Personal Computer - Sharp MZCPU System Bus 0. 0 00 I ZSOA f-' xN w~ Printer t Printer Interface IMZ-SOP5') FD Interface 1 Floppy f-(MZ-SOFIJ Disk I (MZ-SOFB/FBKI Key Board I HD I I

SHARP SERVICE .MANUAt"" .uu .................................................... ~~~~~M~1 ~) PDSM581008·MZ

•

.~ ~

() [FEATURE~

Personal Computer

MZ-80B

Options

MZ·80EU

MZ·80I02

(Expansion Port)

(Universal I/O Card)

MZ-80GMK (Expansion Graphic RAM)

MZ·80FI (Floppy Disk I/O Card)

Optional Peripherals I

MZ·80FBK (Expansion Floppy Disk)

MZ·80FB (Floppy Disk) :J

• The MZ-80B. ste'pped up version of the MZ-80K, is a personal computer with many new functions,

• Using a Z-80 processor (4MHz Version} in the CPU, it is capable of high speed data processing.

• It has a keyboard touch that's ideal for a professional operator and is equipped with a 10 numerical

keys and 10 function keys,

• The cassette-recorder, using an electromagnetic mechanism, can be stopped/started remotely.

Programs and data can be recorded automatically.

• With the optional expansion port, 1/0 card Can be set in the body of the MZ-80B for peripherals

such as a floopy disk, print~r, etc.

SHARP CORPORATION

~-.

r---------Contents---'-----------------.... MZ-BOB

Specifications. , , , , , , , , , . , , , , , , , , , , . , . _ ....... _ ... , ... - - . . .. 1

System configuration and nomenclature of MZ-80B. , , , , ..•. , .... , . - . . .. 3 Configuration of MZ-80B _________________________ . . . . . . . . . . ... 5

Trouble shooting guide. _ ..• _ •. _ .• __ . _ •• : _ •.• ___ • • . . . . . . . . . . • .. 7

CPU board section ••..••..•.••• _ ••••• ~ ••••••• -; •••••.••.••..•. 8

Power supply section ...... '. ' .. .- •• ' ............. , , , , . , , ••••• ' •• 0.' 0' 16 Monitor TV section, . , , ... ', , .. ,o.<:":-;"~". , ~"':', . .-, , ,", ';"~ -~' .:::~:~~~::",,:,"~, ~< . c~· 20

Cassette tape recorder section. , , ~ .•... :;- .. , . , " ........ '-~". , ... , , " -,

Printed wiring board and circuit diagram .•...•. 0" •••••••••••• , •••••

Disassembled view .....•.......•............... , . , .. , , , , , .•.

Packing method ••.. :' •••••....••••..••.••.•. : ••..••••.....•

OPTIONS and OPTIONAL PERIPHERALS

Expansion port MZ-BOEU .............. , ..................... .

Universal I/O card MZ-80102 .................................. .

Expansion graphic RAM MZ-80GMK ............................ .

Floppy disk I/O card MZ-80Fl. ................................ .

Floppy disk MZ·80F8, Expansion floppy disk MZ·80FBK .............. .

Replacement parts list, .. ' ... , ... , ...... , - . ' , .... , .......... .

Caution in Service

'" Maintain the safety []nd protecting ability of the apparatus

after service,

.. High voltage shall not be rised to excess specified level so as to

prevent This apparatus from the extra X·ray radiation.

24

29

45

51

52

55

58

61

67 70

•

•

•

•

•

•

•

•

•

•

• MZ-80B General

CPU LH0080A (Z 80A-CPU) Key Layout Keys 92

Clock 4MHz ASCII Standard, 10 Numerical keys,

Memory ROM 2K bytes Function keys, Cursor control keys, Cassette tape deck control keys

RAM 64K bytes (dynamic RAM) Clock function Built-in

Editor function Cursor control; up, down, right, left,

Display 9" CRT (green display) home, clear.

8 x 8 dot matrix Edit key

1) Characters; 1000 Delete key ~-,--.- --._-- ----

(40 characters x 25 lines) Power supply AC 240V (50Hz)

2) Characters; 2000 Temperature Operating temp; 0° to 35°C (80 characters x 25 lines) Storage temp; _15° to 60°C

----1), 2): software change-over Humidity Lower than 80%

Cassette Standard audio cassette tape Weight Approx_ 16kg Data transfer speed; 1800 bits/sec.

. --- _.-Dimensions Width 45cm

Data transfer system; SHARP PWM Depth 52cm Manual or Automatic control Height 27cm

Sound output 400mW max. (440Hz) _ .. --

• CPU Board Section

CPU LH0080A(Z80A-CPU) 1 pc. Programmable l -- .- . -- counter 8253 1 pc. PlO LH0081 A (Z80A-PIO) 1 pc.

. Programmable ROM IPL 1 pc. 12K bytes) !

Character generator 1 pc, (2K bytes) peripheral 8255 1 pc_ I 1--. interface i RAM Standard; 16K RAM 32 pcs_ --- --- I (64K bytes) Other IC's 40 pcs. I

Video RAM; 1 pc. (2K bytes) I

• Power Supply Section • Graphic RAM (I) PWB Section ------ -

Input AC 240V (50Hz)

~-----

Output 5V

RAM Static RAM; 4 pes. 18K bytes) ---- ---t------------ ._J

Other IC's 17 pes. .J -5V 12V (stabilizing)

12V (non-stabi lizing) - ----

NOTE Specifications and appearance are subject to change without prior notice for improvement. In such a case, the explanation here may be a little different from the product .

-1-

- · • Display Section

l. General specifications 11. Electrical specifications

Size 9" Video output 40Vp-p standard (35Vp-p limit)

Vertical 60Hz (vertical), lS.75kHz (horizontal) Resolution Horizontal *The pattern of the left in Horizontal • the center of the picture Frequency must be clear.

• P~wer source DC 12V, 1.1 A ±1O% Non-linearity Horizontal; ±8% (±14% max.)

distortion Vertical; ±8% (±12% max.) Picture tube E2728B31; 9" 90° deflection

Geometrical Pincushion dist.; 1% {2% max.} explosion proof type

distortion Barrel disl.; 1% (2% max.) Heater; 12V, 7SmA

Trapezoidal dist.; 1% (2% rr,3x.)

1----. Parallelogram dist.;'o (2.5° max.) .'

IC's 2 pes. High voltil<;Je Zero beam; 11.0kV

- I (1O.0kV, min., Transistors 7 pes. I 12.0kV, max.)

----

Diodes 13 pes. Power su pply I DC12.0V, 1.05A (1.2A max.)

-Working range 12V ±10% • Sound output 400mW max. (440 Hz) Scan size Horizontal; 10% (15% max.)

Speaker Bern, round dynamiC type

I Vertical; 10% (15% max.)

(32I2l Horizontal

~-

Control knobs Volume, V -Hold, lock"in range I ±300 Hz (±100Hzlimit)

Contrast, H-Hold, Vertical [ Brightness, Focus lock-in range I -12 Hz (-6 Hzlimit)

~- --

Working 440 Hz (OdB) -10'e to SO°C

Audio frequency I -10dB ±4dB at 100 Hz temperature Characte~istic I -12dB ±4dB at 10kHz

- • I

Sound maxi-

I 400mW at 440 H z

mum output '- ~ ----- --

• Cassette Tape Recorder Section - -

System PWM recording BiaSing DC system

5V ± 5% Erasing DC system Power source 12V ± 5% (stabilizing) • 9.5V'"V16.5V (Non-stabilizing) Playback 667 J1sec. to 333 J1sec.

~- sensitivity (standard)

Semi- 22 transistors Working I _10 o e to +40°C conductors 13 IC, temperature

~~ 9 diodes --

Storage -2SoC to +65°e Tape From C30 to e60 , temperature , ---

Tape speed 4.75 cm/sec. ~- -

Track 2-track monaural type ~ -

Motor Electronic governor motor (12V} L-_~

• I

-2-

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•

•

•

•

The MZ·80B system and expansion thereof are shown in the block diagram 0.1 Fig. 1. The inside of the dotted lines is the constitution of the MZ-808, in which units enclosed in thick-line frames are optional ones. In the expansion port, interface cards can be inserted up to six pieces. The devices outside the dotted lines are optional peripheral devices and user's devices.

Figures 2 and 3 show the front view and rear view of the MZ-80B, identifying the parts with names.

r---------------------i I MZ-80B

I I I I I I I I I I I I I I I I I I I I I I I I I L

I

CRT I Display

I ~ f I

Graphic

RAM CG Rom (RAM 11 8KBI I

'v--- (MZ-80GMKI 32KB 2KB I I

I Graphic Universal c!-RAM 18KB Interface PTR, PTP, etc.

RAM IMZ-SOI021 I 32KB V-RAM

+ Character MODEM 2KS ~ RS-232C Teletvpewriter

Boot Rom ~ I etc.

2KB

IEEE-4SS 1.- IEEE-488 Standard ~~

-" "W Interface I devices CPU °0

I System Bus 0. 00 ZSOA f-'

x N w~ Printer t Printer

Interface IMZ-SOP5')

FD Interface 1 Floppy f- (MZ-SOFIJ Disk

I (MZ-SOFB/FBKI

Key Board

I HD I I I ;<-Interface Hard Disk

Sound Ir- Cassette r f-

MCR

l~ Mark Card Interface Reader

Timer

1.1-Calor

Color Display Intelligent Interface I Terminal

I I

I Color Display

--------- ______________ ---l

Fig_ 1 MZ-80B System and Expansion o Options

D Future Development

-3-

Nonglare ~ _________ + Screen

Special function _____ _ Keys

Main Key Board ______ --:

Brightness _______ ,

Control

Sound Volume Control

Power recePtacle---""

Power Switch ---------i..----

Ground-----------J

r--------------------------------- 9" CRT Display

r------------ Cassette Tape Compartment

!~~~J,~~~?i~i~~ .. -, Cassette tape Counter

~0ii!C=1-.

Fig. 2 Front View of MZ·80B

Fig. 3 Rear View of MZ·80B

Cassette deck ~--- Control Keys

Cursor Control Keys

IPL reset switch

~---"o<,e' Switch

I/O Module Access Window No. 1-6

• •

• •

• •

• I I •

• •

The system diagram of the MZ-80B is shown in Fig. 4. With the CPU and its bus lines in the center, the memorie~ (main memory, boot ROM, V-RAMI, keyboard, cassette recorder, CRT display, clock, reset circuit, and I/O port are arranged, showing the relations with PlO, 8225, 8253, to constitute the MZ-80B.

RESET SWITCH

'IPL RESET SWITCH

FRAME GROUND

-11-

AC

I n POWER SWITCH ~

1 1

POWER UNIT

POWER TC!ITv ONIPL -5V RESET

GROUND

C R E

L-. S

0 E T

A

Z80A CPU

" 4>

CRYSTAL

16 £ 4MHz

OSCILLA-MHZ'l TOR 31.25kHz

Jl

L E D

'IPL RESET " .. " Initial Program Loader RESET

-5-

Main Memol)'

RAM 32k bytes

IPL

ROM 2k bytes

".

RAM 32k bytes

ADDRESS SELECTOR

" r I -,

I1 m ADDRESS BUS

1 11 1

u:

11 IL J I

J ~ T LB S

r-

HAN Z80A-PIO

POK 4> ~

I

KEYBOARD

r--

Fig. 4 r

CHARACTER SPEAKER GENERATOR AUDIO .n RoM 2K bytes r;::::

AMPLIFIER 11

vLj

-" V-RAM l-<-- , CRT DISPLAY - CHARACTER -

:v' 2k bytes I'r OSCILLA· S TOR SHIFT E f=4 L , REGISTER E VIDEO GENE· C V·RAM l- T

, RATOR

GRAPHIC I ------I 0 -" 8k bytes rt 11 T ,

I I 11 11 11 J 1 -= 11 11 11 11 V·RAM

= 11 11 11 P GRAPHIC II . 11 11 , E 8k bytes

ADDRESS BUS R (OPTION) I

=i~ I II1I 11

, P H ,...., E 0

IH III v R P

r A T L I

[)NT BU I 0 v / N

~

0 , !.- ~ ~ P

SHAKE 0

8255 8253 R .

CO Cl C2 T

11 -- ]~~

CASSETTE TAPE CASSETTE TAPE DECK I/O DECK

~-80B System Diagram

I

No. I I

No. 6

•

The system comprises four main units. For quick solution to most operational difficulties, follow the chart below to find which unit is causing

the problem.

Start

Power on

YES

YES

Is the CPU board normal?

YES

YES

End

NO

NO

NO

N9

-7-

Repair the power -supply

circuit.

Repi3ir the monitor TV.

Repair the CPU board.

Repair the cassette recorder.

•

The CPU b~ard is composed of the following six blocks. When it malfunctions, first locate which block is concerned with the malfunctions, and next try to check for its corresponding circuits; the wiring diagrams of every block will

be shown separately.

CPU inoperative

Display block

Cassette recorder block

Keyboard block

Audio block

NO

Clock block

NO

YES

YES

YES

YES

YES

<enoperative YES immediately after >------0-1

power ON,

NO

Check RAM and its peripheral circuits {by usinfj RAM checked,

Check video RAM circuit.

Check IC23 (8255) and its peripheral parts,

Check IC24 (LH0081A) and its peripheral parts.

Check IC23 (8255) and its peripheral P<lrts.

----'

Check IC19 (8253) and its peripheral parts,

Check memory circuit and its peripheral parts,

• Checki~g rnetl1ods()f~~h circuit -,,;

"I, "," .. ,,,' "_ • ",. '" _

:.l.C.By .tbuChinglC package by fingers:c . .•. Ifthey seem too hot by heat gene~atiori;

2.

I(:::--j{ defective" le 'Idad 'is 'hea~'y 'or ~'~mporients are ~ouc~~- '"each' other (ROM and V·RAM are

. ex.~mpted f;~m this checking). e, If.- a circuitry state changes to, an~ther; Sold~ring is- poor, socket contact is impro'per or printed-

wiring is erroneous. By using a synchroscope: • If the relation between input and output of TTL IC is illogical, this means defe.etive IC gate.

• Check if the voltage of TTL IC is as specified: Highle,;el; over 2.4V"Low level; below O .. 5V. • When the signal'is between the high and low levels, is ~here circuit t?uching or !C malfunction?

-8-

, ,

• Display Block

DO -I Bus driver

07 -

AD

Al 1

0 cso SOC

VGAT Whole rever

H

E se

~

I Problem

CSOO

No sync. signal

I

No video signal

wFi-

\ /

Characters displayed but

position abnormal

\ Character generator Vide

-/ Shift

register Sync / ';".,

o signal

. signal

'-----

Video RAM L--

lr Oscillator

V Oisplay controller f------

circuit

Address selector

~ I

Block Diagram around Video RAM

....

.... .... , Check Point . Is the correct signal present at pins 12 and 13 of IC36 ? Yes: Check IC36. No: Check IC42 and I C43 and around them.

(In particular, check if the input of 8MHz, 16MHz and other clocks are correct (Wave form is shown

on page 15.))

Is pin 16 of IC42 at a high level' No: Check IC23. Yes: Proceed to the following.

: Is a video signal present at pin 8 of IC46? Yes: Check IC31, IC33 and IC36. No: Check IC42 and IC43 and around them.

(In particular, check if the input of 8MHz and 16MHz and other clocks are correct (Wave form is

shown on page 15.))

Is the signal at pins 3, 6,10 and 13 of IC37, IC38 and IC39 correct? Yes: Check the address of IC41 and the signals of IC37,

38 and 39 connected to it.

-9-

Position is correct but characters are abnormal

Displayed characters are abnormal

• Keyboard Block

D7

I DO

MI

Al

AD

-\ -----/

B7

I BD

LHO A4

081A A3

I PlO AD

~ I INT lED

Does not accept key entry.

No: Check IC 37, 38, 39, 42 and 43.

Check the common line of IC22, IC41 and IC44 and around the I C22.

Check A, - Ao and D, - Do of 1C45 and IC42.

Key strobe Key board cancelling. signal

Decoder

Block Diagram around Keyborad

,Point

Is key strobe present? Yes: Check keyboard, IC24 and around it.

No: Check IC25, IC27, IC28. IC29 and IC36.

-10 -

If they are normal, check IC24 and

around it.

A3

A2

Al

AO

Peripheral 86

interface 85

18255) B4

C7

C6

C5

C4

1-- -,

b STOP

I

b I p p I

PNL

BLKl

8LK2

P RDATA

P TREADY

b WREADY

I

I

P WDATA

P WRITE

bREW

I o OPEN

I L _____ J

Block Diagram around the Cassette

Condition

~ . --T:-Ch~Ck Point ,I,:

Load is not possible. Is there a signal from pin 6 of le 26?

YES. Check IC23. NO. Check IC26.

Save is not possible. Is there a signal from pin 10 of IC23?

YES. Check IC26. NO: Check IC23.

Motor does not turn. Check IC23.

MOtor does nOt stop. Check IC23.

- 11 -

For cassette

• Clock! Audio Block

07 I

DO

,

-I

IRO Programmable

counter

18253)

CS GO

Al Gl

AD

-cc ',,' " -~;

troblem,. .,;, •..

Clock tunction is

abnormal.

Audio output is

abnormal.

~

31.25kHz 07 I

DO

IRO

IWR

CS

Peripheral interface

182551

PC2 Counter #0, #1, eset signal ,

Al

AD

RESET

Block Diagram around Clock! Audio Block

.'

. ' .... ' " Check Point -

Is there a 31.25kHz signal present at pin 9 of IC19 ? Yes: Check IC19 (8253) and around it.

No: Check IC42 and around it.

Is an output signal present at pin 4 of IC31?

Audio output

.>~;

Yes: Check amplifier section in the display board.

No: Check IC23, IC31

-12 -

• Memory/Reset Circuit Block

AO - A13

Data selector

RAM block

Problem

Picture "panic" when

power is on.

Abnormal action

immediately after end of program due to

BOOT program

Error when program is in RAM

AO-- A10

ROM block

Memory/Reset Circuit

Memory control circuit

07

DO

,Check Point

CPU control bus

A15

1 Al2

Does pin 26 of I C3 go from High to Low when the BOOT

reset SW is pushed?

No: Check IC33

Yes: Proceed the following.

Is pin 15 of IC2 High?

No: Check IC34

Yes: Check address line AO - A15 (ICB, IC10)

Data line DO - 07 (ICll)

Control line (lC7)

IC2, ICS, IC14, IC1B

Is pin 15 of IC2 at Low Level? Yes: Check IC34

No: Check IC2

Check RAM

-13 -

.. How to Use RAM CHECKER

Insert RAM CHECKER into BOOT ROM socket and turn the power on. Then RAM TEST·1 and RAM

TEST-2 will automatically be carried out from RAM address $0000 to address $F FFF as shown below

and.the tested results will be displayed. The checker tests the store by dividing it into two parts of addresses $0000 to $7FFF and $8000 to $FFFF.

Example of the test results (When all RAM'. are normal)

Check RAM (l) block, 16K bytes, RAM (ll) block 16K bytes

1) RAM TEST·1 A writelread test of data $00 and $FF is carried out from address $0000 to $FFFF, and if an error

occurS ERROR is displayed in the 16K bytes unit.

Example of above mentioned display

IOOOOi':: O.K. I .... · Result of writehead test from address $0000 to $3FFF is normal.

,_J _:. '~11'

Example of display when ERROR appearS. I ER:23,5B:00, 01

1........... Write in data was $00 at address $2358 but read·out data was $01.

An error is displayed by the address number at which the error takes place, and the excution of check

is stopped at the address.

2) RAM TEST·2 Write/read test is carried out with the following items_

al Write-in data $00 (From address $0000 to $7FFF) b) Write-in data $FF (From address $0000 to $7FFF) c) Write· in data $00 (From address $7FFF to $0000) d) Write-in data $FF (From address $7FFF to $0000) e) Write-in data $FO and $OF entered alternately (From address $0000 to $7FFF and vice verSa.)

f) Write·in data $00 (From address $8000 to $FFFF) g) Write-in data $FF (From address $8000 to $FFFF) hi Write-in data $00 (From address $FFFF to $8000) i) Write-in data $FF (From address $FFFF to $8000) j) Write-in data $FO and $OF alternately (From address $8000 to $FFFF and vice versa)

Example of ERROR in RAM TEST·2

, .RAM TEST-2 00 FF 00 ER·23FF·01

Test results of a) and b) were normal but in c), although data $00 was written in address $23FF, read-out

data was $01. When ERROR is displayed in the above mentioned RAM TESTs, decide which RAM block is

bad according to the memory address where the error occurs. Then you can decide which RAM is bad in the

RAM block where the error occurs by the bytes pattern of the write-in data and reao-out data. In the above

example, you can tell that it's RAM (I) block by $23FF and that RAM 1 is bad because write-in data is $00

but read-out data is $01. (See Fig. next)

t~' 06 05 04 03 02 01 DO

-------

Write·in date $00 0 0 0 0 0 0 ~Error Read-out data $01 0 0 0 0 0 0 :,: ': l: : .. i to occur

-14-

RAM III RAM 121 RAMlml RAM IIYI

D7 ~'SHARP81 P 16[ P SHAR 24[ P 321

D6 P 71 P 151 P 231 P 311

D5 P 61 P 14/ P 22[ P 30[

D4 P 51 P 131 P 211 P 291

D3 P 4[ P 121 P 20 1 p 281 D2 P 3[ P 11[ P 19 1 P 271

D1 P 21 P 101 P 18 1 P 261

DO ~ 1 I P 91 P 171 P 25 1

• Waveforms of CPU Board

Pin 23 of IC42 Pin 22 of IC43 Pin 20 of IC42 Pin 20 of IC43 -

- -lSMHz 8MHz 4MHz

Pin 19 of IC42 Pin 21 of IC42 Pin 21 of IC43 Pin 19 of IC43

- - - - - -

~ - '-----

2MHz lMHz lMHz

Pin 10 o~ IC42 F'in 12 of IC36 Pin 7 of IC42

J U I

- ,---

16.64ms 64", 64",

Pin 9 of IC19

3L251(Hz

- 15-

~ AC 240V 50Hz ~

•

Filter circuit

r-- Voltage stab;';,er c;rcu;t :

Transformer L Rectifier circuit 1 I-- I--

f-

Voltage stabilizer circuit Rectifier circuit \

Voltage stabiliz.er circuit Rectifier circuit 1

Block Diagram of Power Supply Circuit

• .. • ----.--. --------'_._ • _____ • ______ .0 ____ - __ .. __________ _

+12V

r-+12V

E

+5 ~

-CO -5V

+12V

+5V

'-E

..

•

•

•

•

•

• Trouble Shooting Chart

Problem (1) No voltage at any output terminal. Check primary circuit which includes the transformer.

Problem 12)

Problem (3)

No. -5V.

Is approx. 11 V present on both ends of C201?

Check IC201, C203 aod R201,

No +12V.

NO

NO

Chlt~k t101, F201, D201, C201 and C202.

Check primary circuit which includes T101.

Is voltage at the NO other output ~~~------------------------------------------------__ ___ terminals normal?

Is approx. 24V

When A309 is open, does a O.2Vpp

appear at pin 12of1C301,

Check 0301, Q302 and smoothing circuit,

NO

NO

Check IC3Ql and circuit of IC301.

-17 -

Check F301, nOl, D301. C309. C301, C302 and C304.

Check primary circuit which includes Tl01.

Problem (4) No +5V,

Is voltage at the other output terminals normal?

IS8pprox.14V present at pin 15 of IC4017

NO

NO

When R405 is NO open, does O.2Vpp appear'>='---____ ~

at pin 12 of IC401?

Check Q401, 0402 and smoothing circuit

Problem (5) -5V is abnormally high. Check IC201

Problem (6) +12V is abnormally high.

Check 1C401 and circuit of IC401

Check 0301, 0302 and IC 301.

Problem (7) +5V is abnormally high. Check 0401, 0402 and IC401.

Check F401, T101, D401,C412,C401 - C404, C407

Check primary circuit which includes T101.

•

•

•

•

•

• Waveforms of Power Supply Circuit

1 19PSi - ---,-,

14Vpp

I

Pin (1) of IC301 0301 collector

Pin 7 of IC401 Q401 collector

These are basic waveforms when the load current of +5V 2.SA, +12V 1.25A and -5V 10mA flow from the output terminals.

-19 -

"'i .~

'" o I

u

Audio signal

Video signal

Vertical horizontal sync. signal

+12V ~

Power supplv

..

Contrast

t 1- Audio Video signal amp.

amp. Q2001 IC2002 Q2002 t Brightness Volume

Vert. sync. signal Video signal

Sync. amp. Vert. DSC.

02003 amp'/output

r- amp. IC2001

To Video amp.

t t t To sync. separator

To vert. V·HOLO V·UN V·SIZE

circu'lt To audio V circuit

Horiz. sync. signal

To horizontal circuit To FBT circuit To CRT heater

AFC 02003, t--02004

t

.,

Horiz. Horiz_ Horiz. DSC. I-- drive output 02004 Q2005 02006

~H.HOLO

Block Diagram of Monitor TV Section

~ •

~IIU ~~~ Speaker

V .+. \. DY /

J4>IX CRT

~ \

H~ ,,'I- H 'Do] r- ~

0

~ .-F.B.T

E2728B31 9"

voltage

~ ?

• Trouble Shooting Chart

Problem 1: No picture appears.

No pioture -1 N~ Check CPU board, I NO Check CPU board.

i

Check I Check VR-2002 Check

Only video Check 02001, Q2002 and r raster f-----' L video ~ +12V power r-- input signal. vide0-40V power appears.

YES circuit. supply, supply.

Y~ Neither

L. raster nor picture NO appears.

-1 Check CAT plug. I

W rl Defective CAT. ~.

Check CRT heater.

YES Check high

~ voltage at K, Gl,G2and G3 of CRT.

Problem 2: Sync operation remains ineffective.

Nn Check CPU I Neither

board. r- horizontaJ nor vertical sync.

~.0~e I sync, -~gnal?

operation is ineffective.

-

Only vertical YE S sync. operation

is ineffective.

y Only hOrizontal . sync. operation l. is in.effective.

Problem 3: Raster is too narrow.

NO Chcek V-HOLD VR~

,--~_i_~~_~_~w_i~_~_lt_~~_f_~m_'~_4_' ~~I!, I I~~.:::'·:~:::~·I '" .1 L' _~_~_g_r_~._a_n_d~ of IC2001 (at pin I

YES (".') normal? : Is output

L.....::..:...... .- YESl.. waveform of

IC2001 normal?

Problem 4: No sound comes out.

NO Agalfl set correct program.

Is there YES j audio ~.ignaP

NrO __ --'! Check CPU! L~oilrd. _-__ J I

YES

Is input signal of IC2002 (at pin@1 normal"?

NO

YES

- 21 -

iD2009, D2010 Q2007)

Cheek middle/ YES high voltage

rectification YES (D 2006. D 2009 and n Defective CRT. FBT.!

'-----.

f-- Check AFC, ) 'cl Check J-NO

horizontal . NO FBT circuit. oscill",or and ~

drive output circuit.

~.- ......

Check sync. separation (D2001 and Q2003l.

Check integrating. Circuit (R2030 to R2023, and C2011 toC2013).

Check AFT circuit (Check point CD output of FBT, R2030, C2021 , R2033, R2055 and C2055)

NO Defective IC2001.

YES ,Check deflection coil (C2016L

Chceck VR, I R2050 and I C2043 --.J

NO

Is output signal of IC2002 )-__ /at pin (7)) normal?- YES

Check C2053 and J speaker.

r------------------------------------------------------------------------• Waveforms of Monitor TV Section

Video input signal Video output signal Video output signal

cD @ CID

+ 111111 J~ ,ilL I '1I_' I --

5m, 5m, 5m,

Sy~c. input signal Sync. signal amp_ output Vertical 'SYnc, -;igna;

@) ® CID

lll-lf 'H\ __ J\ nt-~~ IU lV " -

20/1s 20lls 2m,

Vertical oscillator Circuit Vertical output waveform Vertical drive collector waveform

(7) (8) (~

U~ r~ J lt~f i 6Vpp V I lOIT _ L J V T-----'------oy

5m, 1.5V 5m,

Voltage at PlrlCg) of RH-IXOO15 Vertical deflection coil VOltage waveform Vertical linearity circuit waveform

iiJ) rG '0)

l~V T~ ~ ltlV avpp i L

'L... -lJ --- -~ --~ I ---.J

5ms 5ms 5m,

HOflzonti'll sync. sl~nal waveform AFC waveform rBT waveform

jtl Cf; C~

"if n ttL (l ll'~t L __

_ __.-1 'iJ ' 5V

'--- I 5V -"------------- '---- -

~ •

20.us 20" 201-'5 ---------'-----

Horizontal oscillator emitter waveform Horizontal oscillator output waveform Horizontal oscillator waveform .~~--+-~~~~~~----_r----------~----~

.~ 5V lit

tll

OV

-1$

1- \,-7Vpp

-4-5V W

OV

20~s 20}-ls ---------------

Horizontal output pulse

f-_____ -'20~_s ______ +-______ _ Horizontal drive collector waveform

15Vpp

1 20}-lS

AFC pulse

20/.15

Audio input signal

HorizOntal output base waveform

'20

T 160V

@:I

T 8V

@

20}-ls 20}-ls

Middle voltage FBT pulse Video power supply pulse ~---~--~~~~~~-~

20}-ls

Audio output waveform

-23 -

~40V ( ov

I 20/.15 .J

The figures encircled by 0 in the above refer to those of "Wiring Diagram" --"Check Points of Waveforms",

Era ... "'.od _

RIK:Drd _. ___ ~.

DiHftrll",illio" circuit

." r:>---... -------<iH~~~~;, A31D2 A310S

Amp.Clre,'" (In) 1C3101

WDATA (j~------------------------------------"

TAPE

Amp.cireull 11(4) u::ll02

Amp. ci,,:: .. ,,1 llmlter cir""';1 (2/4) )(;3102

W"",,/orm shapinv 13/4) \C3102

BLK2 O--------r-l

AEWbuuo"

J:L GNDO

FF button

db GNDO

Brake .ol~nojd cor.tr"I cuc,,;1 IC3006.IC3011

BLKl O-------.!~-.r__::::-::::::~I Tope di,ec"ol1 conlrol circuit

AEW ()'-----It>-"i __ ~":'=OO='~ ____ J

NS.+I2V

Dri.e mcuil 030\5,03016 03017,0301S

S.+12V

Drive cire"" 03000, 03007 RY2, RY3

NS.+12V

Amp.cilctlil (212) (C3101

RM

Sroke solenoid

Raol mOtor

Panel soleno,d coM'OI Circuit IC3D06.IC3007

Ortv" ci,CUit 03019,03020 03021,03022

PMel .olono;d

SlOP button

S.'I2V

D,i".ei'CuI1 0301 I. 03013

CM

G'DOOO' __ -r-',~~,"~"""=-",, ~---- --------;=~=;--~o--.,O 1114) IC3002 '."oe rotatIon G"D 1:lJ41 IC300!) I ~

STOP ()----------'"i __ ~=-:::= __ j_------------------------I· o.,te<lLon <,,,.U,, S.+12V

EJECT but\om +~V NS.12V

Dr;veci,eun 03012.03014

Block Diagram of Cassette Tape Recorder

-24 -

.. ~ ' .. -

Solenoid ", open """'Ua co"",

CaP'tan mOtOr

MlcrO·,wilch lochoock c.o ... 1te ''',.rlion

. • Trouble Shooting Chart

Problem (1) The tape does not run when the FF/REW button is pushed. (Motor c:joesn't

rotate. 1 YES

l Check r8el motor.

Check motor voltage I

Is +12V present

n Check bu tton 1

between J3005- 7 r...r switch n

l 9 NO NO Check micro-switch

Check +5V, S. Check~~F. REWJ +12V, NS. +12V AND STOP

button switches

(Solenoid doesn't NO Check level of f NO J3004-1. Check har/le work)

Check solenoid ~ av with tape inserted voltage Check Brake

I 5V with tape not in""ted~

Check le .... el of NO

Does +12V appear'" solenoid CN3002~3 Check CPU board YES

between J3005-3 YES Does the av an d 5V ""'-4 and then +4V level change when

Is level of J3003-111 the COunter linkage magnet is turned QV? by hand. YES

si Check level'of

YE IC3011

Problem (2) Tape turns but, program cannot be recorded.

N~ Check CPU board

Does a signal N~ Check CPU come from I- board J3003~1 ?

y'E; Is level of f- ~ Check relay RY1. J3003-5 OV?

Does a signal

Y'E; appear at the f-recording head?

Y'E;' Check recording head.

I ~-

Problem (3) Tape turns, but programs cannot be played back or an error occurs.

NO Check starting

r position of tape

Does a clean wave-N,!?.

With a bad relay form come from f- RYl, does the J3003~2 ? erase head work?

Size of output

y'E; voltage waveform f-of 1/41C 3102.

~----

Low

Y'E;

Improper azimuth adjustment of record/playback head.

- 25-

• Azimuth Adjustment and Head Cleaning

* Azimuth adjustment of record/playback head 1. Connect a synchroscope to pin 8 of IC3102. 2. Load a test tape IlEAC, 3kHz-signal recorded} and play it back. 3. Rotate the azimuth adjusting screw so that the waveform on a synchroscope will be the maximum.

RecordJplayback head

Head cleaning

Head azimuth adjusting screw

Clean the heads, capstan and pinch roller often, to remove dust and tape residue. Foreign material on them

impairs the sound quality of both recording and playback. Open the cassette holder, remove the tape, push the play button and clean them with a soft cloth moistened

in alcohol.

Erase protection To protect a cassette tape from being accidentally erased it was designed with two removable tabs. By removing

tabs recording mechanism does not fUnction when the record button is pushed.

Pinch roller Head

- 26-

.-.. "

(

• Waveforms of Cassette Tape Recorder -

1st stage amp. output waveform

CD

I M

,J °r

vpp

Operational amp. input waveform

@

T, "

1,5Vpp

~ v

Record input waveform --ct)

'fruRillUf -.-~-.--

Operational amp. input waveform Operational amp. input waveform ,

Cl) ®

-L 6mv~ pp 1,BV

T ov

Operational amp. output waveform Output waveform

CID @

-tW' T 4Vpp

~ --

, Record amp. waveform Head input waveform I --I

'® CID

T ,

I 4.8Vpp

1 I - - -' ___ .0-

- 27-

l) / f\ II~

-

The figures encircled byOcorrespond to those of "Wiring Diagram" - "Check Points of Waveforms",

I I , I ,

1 • CPU PWB

2

3

4

8

- 29-

G H J K L .•

Notes: The circuit diagram and printed wiring board subject to change without prior notice.

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NQ04.4PA·B [C_tuPWB)

JJOO2..J

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Early Circuit Diagram

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REW.l.EO 68. J3002·'

R3052 AEV J3002·2

S.+12V 12V

68. J3002-3

A3053 FF FF.lEO

F0335PA·' (LEDPW'S]

Late Circuit Diagram

The "FF" and "REW" display LED circuit was changed with later products. When the cassette PWB is replaced, check the LED PWB circuit. (Adjust the pattern of the LED PWB it the ~ircuit does not conform.)

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10 94A01080BCTAM Guide Roller B AB 11 94AOl180BCTAM Guide Coller AA 12 94A01280BCTAM Head Panf~1 Spr ing AA 13 94ROl380BCTAM Pinch Aotler Arm Ass'y AO

'14 94AOl480BCTAM Drive Unit Ass'y BB 15 94A01580BCTAM Flywheel Capstan AP

~ J \111 ~ .A-® 16 94AOl680BCTAM Flywheel Metal AH 17 94A01780BCTAM Thrust Pressure Spring AA 18 94R01880BCTAM Thrust Pressure AA 19 94A019BOBCTRM F.L DamPf!f AC 20 94A02080BCTRM F L Hold Plate AD 21 94A02180BCTAM Panel Plunger Call Ass' y AW 22 94R022BOBCTAM Plunger AG 23 94A02380BCTAM Plunger Shaft III AB 24 94A02480BCTRM Plunger Lever Ass'y AC 25 94A02580BCTAM Brake Plunger Coil Ass'y AW

1 26 94A026808CTRM RC Lever AC 27 94A02780BCTAM Brake Pin AB 28 94A02880BCTAM Main Motor Ass'y AV

25 29 94A02980BCTAM Motor Pulley- AC 30 94R030BOBCTAM Main Belt AE 31 94A03180BCTRM P.C B. Ass'y AX 37 94A06480KCTAM MOlor AV 38 94A06180KCTAM EraSt! Head AG 39 94A06080KCTAM RIP Head AM

11 . 1 1

71 94A0718PBCTAM Nylon Washer 2.5 x 7 x 0.5 AA 72 94A07280BCTAM Nylon Washer 2.5 x 6 x 0.5

AA I 73 94A07380BCTAM Nylon Washer 1.6 x 3.8 x 0.5 AA 74 LSTPF 2015PAZZ Spring Ass'y AD

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8 Parts-fitted face

,. "~;':I Opposite Side

- 56-

• • Packing Method

Protected Seat (SSAKH0043PAZZ)

PWB Sleeve (SPAKS0028PAZZ)

, ' MZ-8010-2

,

(solder face)

,------Packing Case

(SPAKCOl16PAZZ)

- 57-

Instruction Manual (TiNSE0020PAZZ) English

~~~~Seal x 2

(TSELF0001PAZZ)

Expansion Graphic RAM MZ-80GMK

2

3

4

5

6

7

8

A B c D

• Circuit Diagram

01

CSlO

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OD

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o. o. o. o. 0,

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C13 tCI8 470PF I

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MZ-80GMK

-58 -

GO

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t

2

3

4

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7

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Perspective View

Parts-fitted face

Opposite Side

H.

• Packing Method

Protected Seat (SSAKH0043PAZZ)

PWB Sleeve

(SPAKS0028PAZZ)

MZ-80GMK (solder face)

~---Packing Case (SPAKC0117PAZZ)

-60 -

'----- Seal x 2

(TSELF0001 PAZZ)

•

••

•

•

Floppy Disk 1/0 Card M Z -8 0 F I' · A 8 c o E F G H

• Circuit Diagram

2

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2

3

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-62-

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D Opposite Side

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I I I I I I I

·. __ . __ .. -, .. _- -----

• Explanation of Floppy Controller MB8866

,t Terminal Connection Chart

NC 40 NC

WE 2 39 IRQ

CS 3 38 DRQ

RE 4 37 DD EN

Ao 5 36 WPRT

Al 6 35 iP DALO 7 34 TROO

DAL1 8 33 WF

DAL2 9 32 READY

DAL3 10 FDC 31 WD

DAL4 11 30 WG

DAL5 12 29 TG43

DAL6 13 28 HLD

DAL7 14 27 RAWREAD

STEP 15 26 RCLK

DIRC 16 25 RG

EARLY 17 24 CLK

LATE 18 23 HLT , MR 19 22 TEST

(GND) Vss 20 21 Vcc

Terminal name and explanation of functions

Terminal Terminal Name Symbol I/O Explanation of Functions No.

20 POWER SUPPLY Vss I Ground

21 Vcc I +5V power terminal

19 MASTER RESET MR I With MR = 0, MASTER RESET starts, STR7 bite ( )0 is reset and becomes SCR (01)H, CR (03)H. The restore command is activated with a rise from MR low to high.

Computer Interface

2 I WRITE ENABLE WE I .!!J§ the strobe input terminal only for data write-in to the inner register. With CS = ° and WE = 0, write-in is possible.

3 CHIP SELECT CS I It is the chip selection signal. With CS = 0, the chip is selected and sending and receiving of data with the computer is possible.

4 ! READ ENABLE RE I It is the strobe input terminal for read-out of data in the inner register. With CS = ° and

I RE = 0, read-out is possible.

5 REGISTER SELECT AO I It is the input terminal for selection of the inner register. Selected registers are CR, STR, 6 LINE A1 TR, SCR and DR.

7 DATA ACCESS DALO I/O It is an 8-bite, two-way data input terminal. I LINE l When CS = 1, it is high impedance.

14 --

Signal polarity is reverse. (Negative logic) DAL7

24 CLOCK CLK I It is the input terminal for the 2MHz standard clock: In the case of a mini floppy disk, it is 1MHz. •

-63 -

Terminlt Terminal Name Symbol I/O No.

38 DATA REQUEST DRQ 0

39 INTERRUPT IRQ 0 REQUEST

Floppy Interface

15 STEP STEP 0

16 DIRECTI.ON DIRC 0

17 EARLY EAR>LY 0

. 18 LATE LATE 0

22 TEST TEST I

23 HEAD LOAD HLT I TIMING

25 READ GATE RG 0

26 READ CLOCK RCLK I

27 RAW READ RAW I READ

28 HEAD LOAD HLD 0

29 ITRACK GREATER TG43 0 THAN 43

30 WRITE GATE WG 0

31 WRITE DATA WO 0

32 READY READY I

33 WRITE FAULT WF I

34 TRACK 00 TROO I

35 INDEX PULSE IP I

36 WRITE PROTECT WRPT I

37 DOUBLE DENSITY DDEN I

40 NON CONNECTION NC 1

Explanation of Functions

It is the open drain output and, when DRQ ~ 1, it indicates byte data accumulated in OR in case of read-out. In case of write-in, OR is empty and it indicates a demand for data. DRQ is reset through the function of write-in or 'read-out. Connect a 10Kfl. blew up resistance.

It is the open drain output and with generation of command end, stop or interruption of type IV command, IRQ ~ 1. It is reset with the write-in of the following command or read-out of STR. Blew up resistance is 10Kfl..

The step output generates a step pulse for moving the head. There is 1 pulse for 1 step.

It is the terminal showing the direction 'of head movement. With DIRC ~ 0, the head moves outward and with DIRC - 1 the liead moves inward.

It is the output terminal for write preconvention and .when EARL Y ~ 1 it indicates that serial data output from WO should be shifted faster .

It is the output terminal for write preconvention and when LATE ~ 1 it indicates that serial data output from WO should be shifted slower.

Input terminal used only for chip testing. (When TEST ~ 0, delay due to the inner timer is ignored) The user should connect this terminal to 5V or leave it open.

It is the settle input signal for the head after a head load command (HLD ~ 1). It engages when HLT ~ 1.

With Ru 1, it informs the external data separator of a check of the field only when FDC is 0 (in case of FM) or of the field only when it is 0 or 1 (in case of MFM). It is the signal for takinQ this simultaneouslv.

This is a signal for making a window in the data. It is developed in response to external data flow and is input on the FDC §ide. Related to RAW READ, rising and falling is important but level (high or low) is not important.

This is raw data directly input from the disk drive. It is used when receiving a signal and data is indicated by a negative pulse.

It is the output terminal for controlling whether the head ,is pressed down to the media or not. The head is pressed down to the media when H LD ~ 1. The head is separated when HLD ~ O.

It indicates that the head is positioned from track 44 to 76 when TG43 = 1. It indicates that it is from track 00 to track 43 when TG43 ~ O. This output signal is effective only at the time of read/write commands.

Output indicating that data is being written into the disk. It indicates data write-in when WG = 1.

It is an output for read-in data to the disk. Pulse width for MFM is 250ns and for FM it is 500ns. Both data and address mark are output together at the same time in the case of both FM and MFM.

It indicates that the disk drive is ready for operation when READY = 1 and read/write operations are performed. When READY = 0, it indicates that the disk drive is not ready for operation, read/write operations are not performed and IRQ = 1. Namely, seek is carried out without reference to the READY condition. It indicates the polarity of the READY input is inverted to STR 7.

It is the input for trouble checks during write-in to the disk. It indicates an error during write-in when WF = O. The write command is stopped and the WRITE FAU LT status bite set.

Input indicating whether the head position is in track 00 or not. It indicates track 00 is being checked when TROO ~ O.

Input indicating that the in~x pulse of the disk is being checked. It indicates the index pulse is being checked when IP = O.

Input indicating that write-in to the disk is forbidden. When a write command is started, generally WPRT is sampled and if WPRT = 0 the command is stopped and WR ITE PRO-TECT status bite is set.

This input is for selection of single or double density operation. Double density is selected when DD EN = 0 and single when DDEN = 1.

-64 -

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• Adjustment

Adjust and check the following when exchanging IC7, 20, 26 (74LS123N), TR 1 and their peripherals. When adjusting, add power voltage 5V to TP7 (+5V) and TP9 (DV) and apply 4MHz clock (duty ratio 50%, TTl level) to TP2.

VR 1 Adjustment As shown in Fig. 1, apply a negative pulse with a period of more than 30/1s-50/1s to TP3 (READ DATA). At this time, adjust VR1 so that the width of the negative pulse appearing at TP5 i. 5/1',

~ 10.2-0.4#S

TP3 -{;""s . 'U U. 3D.us ...... 50",s

TP5 # ------------------------,~

Fig. 1

VR2 Adju.tment Apply a negative pulse with a period of 5/1' to TP3 (READ DATA). At this time, adjust VR2 So that the width of the negative pulse appearing at TP4 is IllS.

0.2.-..... 0.4 j..lS

TP3 -- ---.Ml-t====;:::::======:::t --0 4IJ.s

TP4 ----j~1:".=':r------------_t

Fig. 2

VR3 Adjustment Apply a negative pulse with a period of 4/1s to TP3. At this time, adjust VR3 so that the voltage of TP8 is 2.65V. After adjusting, change the period of the negative pulse added to TP3 and check that the VCO output is within a periodic range of 4ps ±l,us.

Adjustment range The following shows the adjustment range for each adjustment.

• VRt adjustment • V R2 adjustment • VR3 adjustment

5/15 ±O.2J15

1J1s ±O.D4/15 2.65V ±O.05V

- 65-... -----------------

• Packing Method

Protected Soot (SSAKH0043PAZZ)'------

PWB Sleeve (SPAKS002BPAZZ)

MZ·80FI (solder face)

"

,-----Packing Case (SPAKC0117PAZZ)

-66 -

'------ Soal x 2 (TSELF0001 PAZZ)

•

•

•

•

.-

j

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-

-

3

-

4

-

5

-

Floppy Disk MZ-80FB Expansion Floppy Disk MZ-80FBK

• For the system of MZ-80B, MZ·80FB/MZ·80FBK m.ch.~nically differ from MZ-80FD/MZ-80FDK (for the system of MZ-80K) in signal connecter on the rear side and power supply circuit. Howeyer, the disk drive are the same as those of the MZ-80FD/MZ-80FDK in circuit design. Use the service manual of the MZ·80FD/MZ-80FDK for service.

A I B I c I

• Power Supply Circuit (PWB Section)

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.-• Disassembled Views

@9)(forMZ-80FB) @(for MZ-80FBK)

@(forMZ-BOFB)

® (for MZ-BOFBK)

\ @

REPLACEMENT PARTS LIST

• NOTES, Be sure to use regular parts tor securing the safety and reliability of the set. Parts marked with" 6 " {D) are impor-

tant for maintaining the safety of the set, 8e sure to replace these parts with specified ones for maintaining the safety and performance of the..set-

MODEL MZ-80B

REF. PART NO. DESCRIPTION CODE REF. PART NO. NO. NO • DESCRIPTION CODE

••• CPU BOARD UNIT SECTION ••• TRANSISTORS AND DIODES

DCPU·OOO9PAZZ Assembled CPU Board Unit Q1

} (Not replacement item) Q2 VS2SC373·G/·l .2SC373G AC Q3

I~JTEGRATED CIRCUITS 01 VHD1S1555//1A lS1555 AA

ROM [)PRQMQOO5PAZZ IPL MB 8516 12K ROM) BM RESISTORS • CG-ROM DPROMOOO6PI\ZZ TMM323D-l 12K ROM) BK RAM RH-iX0145PAZZ D-RAM4116 BE Rl ICl } R2 RH·jXOO70PAZZ SN74LSOON AE IC33

R3 IC2 RH-iX0240PAZZ Gate array (14297) BD R5 IC3 RH-iX0228PAZZ LHOOBOA (CPU) BG RB IC4 RH·iX0104PAZZ SN74LS42N AH RI rC5 } RII-iX0101 PAZZ SN74SQ4N AG R10 VRO-SC2EF102J 1 K ohm 1/4W AA IC18

ICG

) R12

le7 R13 • IC10 f\11-iX0123PALZ SN74LS244N AS R:n

IC16 R34

IC9

1 R3G

JC2l RH-iXOO4QPAZZ SN7t1121N AG R37

ICll } R38

IC22 RH·iX0124PAZZ SN74LS245N AR R4

I Je12

J

R9

RH-iXQQ74PAZ7 SN74LS04N AE R14 VRO-SC2EF331.l 330 ohm 1!4W AA 1C28 RI8 IC32 R8 VRD·SC2EF222J 2.2K ohm 1/4W AA le4D Rll

1 IC13 } R40 VRO-SC2EF472J 4.7K ohm 1/4W AA • RH-iXOO78PAZZ SN74LS32N AF IC20 R15 VRD·SC2I:Fl01J 100 ohm 1/4W 1>.1\ IC14 l Rll

I IC15 rH 1-IX0148PAZL SN74S157N AQ R21

Je17

I R23 VRD·SC2EF221J 220 ohm 1!4W AA

IC35 RH·'XOO75PAZZ SN74LS08N AE R25 IC46 R32 IC19 fH-l-iX0146PAZZ D8253C 8C R16 } IC23 RH-;X0136PAZZ D8255C BA R3b

VRO-SC2EF271J 270 ohm 1/4W AA

IC24 RH-jX0229PAZZ Lf-lOOB1A (PiO) BE n19 IC25 RH-jXOO45PAZZ SN74154N AN R20 lC26 RH-iX0102PAZZ SN74LS14N AM R?2

IC27 } R24 IC29 RH-iX0252PAZZ SN74LS09N AE H26

VRD·SC2EF103J lUK ohm 1!4W AA

IC30 R28 IC31 RH-iXUD3HPA7Z SN7406N AG I IC34 R H-iXaQ79PAZZ SN74LS74AN AG R31 IC36 RH-iX0247PAZZ SN11LS86N AG R39 IC37

) R33 VHD-SC2EF8:2J 8.2K ohm 1/4W IC3B RH-iXOO83PA?Z SN74LS 157N AH RA5 RMPTC1014PAZZ Resistor Array 10K ohm x 7 IC39

RA6 RMPTC1004PALZ Resi5tor /\rray 1 OK ohm x 8 AD IC41 RH-iX0256PAZZ S·RAM. TMM2016p·1 BP IC42 RH-iX0241 PAZZ Gate Array (14298) BD IC43 RH.iX02'12PAZZ Gate Array (14299) BD IC45 RI-I-iX0129PAZZ SN74LS165N AQ

-70-

'REF. NO. PART NO.

CAPACITORS

C3 C5 C7

C10 C12 C14 C16 C18 03 C25 C27 C2a

C2 ) C9 C11 C20 C22 C30. C1 C4 C6 C8 C:13 C15 C17 C19 C21 C26 C28 C31

I C38 C46

I . C49 Cb4 C56 C58

I C65 C69 C70 C!4 [39

C:O ) C43 C4S CSs C57

70

} C53 CfiG C68 C71

RC-K70001 PAZZ

VCSACU1VE104M

VCTYPU1BD104Z

VCOYKU1HM332K

VCEAAU1CW106Y

VCEAAU1CW1Q7Y

VCCSPR 1 H6471 J VCCSPR1 H6331J VCOYKU 1 HMl 02K

MISCELLANEOUS

X'TAL RCRSAQ015PAZZ

MODEL MZ-80B PARTS LIST

DESCRIPTION

0.1MFD.50V

CODE REF. NO.

AE

eNl ~ CN2 f

~~~ } CN1Q

PART NO.

OSOCZ0010PAZZ OSOCZ0011 PAZZ OSOCZ0012PAZZ OSOCZ0022PAZZ

OPLGZ0065PAZZ

OPLGZOOZOPAZZ

DESCRIPTION

24-Pin le Socket 28·Pin le Socket 40·Pin le Socket 16-Pin le Socket 20:Pin Terminal (for RAM

Option)

3-Pin Terminal

leoDE

AF AN AH

AE

AM

AD

CN4 } CNb OPLGZOO67PAZZ 40-Pin Terminal (for Bus'lines) AP

0, lMFD, 35V Tantalum

O.lMFO,12V,Ceramic

O.003JMF-D, 50V, Fjlrll

10Mro, 16V, AluminurTl

lOOMFD, 16V, Alurninum

470PF, bOY, Ceramic

330PF, SOV, Ceramic Q,Q01MFO, 50V, Film

Crystal, 16MHz

AE

AB

AA

AB

AB

AA AA AA

AM

eN6 CN? CNS

CN11 CN12 CN13 CN14

eN15

OPLGZ0048PAZZ OPLGN0303CEZZ OPLGN0403CEZZ

OPLGZ0066PAZZ

OPLGZ005?PAZZ OPLGZ0068PAZ~

OPLGZ0069PAZZ

OPLGZ0078PAZZ

••• MONITOR TV &

12-Pin Terminal (for Cassette) 3-Pin Terminal 4-Pin Terminal (for Pow~r

supply)

20-Pj~ Terminal (for Keyboard) 4-Pin Termin<ll (for LED) 1 D-Pin Terminal (for Graphic) 6-Pin Terminal (for Monitor

TV)

14-Pin Terminal

CASSETTE TAPE RECORDER SECTION •••

-MONITOR TV PWB

DPWB·0221PAZZ

INTEGRATED CIRCUITS

i2001 RH-iX0015T I\ZZ i2002 RH-iX0243PAZZ

Assembled Monitor TV PWB

Unit (Not replacement item)

I-IPC1031H, Vertical deflection LA4200 Suund Amp,

TRANSISTORS AND DIODES

02001 Q2005 02007 02002 02003 02004 02006

} VS2SC121J.C1A

VS2SC 1 b14-/1 E

} VS2SA673·C/1 E

VS2SC681A-R1A

02001 VHD02Z7R5AIIA

02002 } 02006 RH-DX0039TAZZ

D2003 } 02004 VH01N34AIII.1 LJ2Q05

02007 RH-OX0062CEZZ

D2008 } 02011 RH-OX0043TAZZ D2012

D2009 } 02010 VHD05Z20LI11A

D2013 VHD1S1555111A

2SC1213

2SC1514

2$A673

2SC681 A.R

7.5V Zener

S1J1ECT208

IN-34A

RH1

SiR6D

20V Zener

1S1555

-71-

AE

AB AB

AG AC AH AD

AH

AN AK

Ar

AC

AM

AC

AC

AB

AD

AC

AC

AA

,IlEF. NO.

PART NO.

RESISTORS

VRD·SC2EF47OJ RVR·M7003TAZZ

R2001 R2002 R2003

R2oo4 R2020 R2005 R2006 R2007

} VRD·SC2EFI53J

VRD·SC2EFI21J VRC-MT2HG122J RVR·M0036PAZZ

R2008 RVR-84010PAZZ R2009 VRD-SC2EF224J R2010 VRD-SC2,EF472J

R2011 ) R2044 VRDSC2EF473J

~~~i~ 1 VRD-SC2EF102J

R2038 R2013 R2014 R2015 R2016

R2017 ) R2018 R2019

R2021 I R2026' R2053 R2022 R2023

VRC·MT2HG3R3J VRD·SC2EF173J RVR-M7013TAZZ VR D-SC2EFI22J

VRC-MT2HGl R5J

RVR-M7004T AZZ

VRD-SC:;:;>EF331J

vnD-SC2EF123J VRD-SC2EF272J

R2024 VRD-SC2EF103J R2025 RVR-M7052TAZZ R2029 VRD-SC2EF821J R2D30

R2031 ) R2032

R2033 ) A2037 R2034

R1035 ) R2036 R2Q39 R204Q

R2041

R2042 } R2043 R2045 R2046 R2047

R2050 R2051

R2052 } R2054

VRD-SC2EF822J

VRD-SC2EF682J

VR D-SC2EF392J

VRD-SC2EF330J

VRO-SC2EF332J

VRD·ST2EF680J VRO-SC2EF221J VRC-MT2HG56W

VRC-MT2HG330J

VRO-SC2EF154J VRD-SC2EF411J

RVR-B4009PAZZ RVR-A0003PAZZ VRD-ST2EF 120J

VRD-SC2EF104J

R2Q55 VRS-PU3D8222J R2056 VRD-SC2EF101J A20!)7 VRO-ST2EF104J

R2060 VRD-ST2EF273J

CAPACITORS

C2001 } C2039 C2040 C2002 C2003

VCEAAU 1 HW476Y

VCCSPR1H6151J VCEAAU2EW106Y


DESCRIPTION

47 ohm 1/4W Variable Resistor 500 ohm

15K ohm lJ4W

120 ohm 1!4W 1.2K ohm 1/2W Variable Resistor: 500K ohm Variable Resistor 250K ohm 220K ohm 1/41./':1 4.7K ohm-l/4W

47K ohrT11!4W

1 K ohm 1/4W

3.3 ohm 1/2W 27K ohm 1!4W Variable Resistor 50K ohm 1.2K ohm 1/4W

1.5 ohm 1/2W

Variable Resistor 300 ohm

330 ohm 1/4W

12K ohm ?l4W 2.7K ohm 1/4W 10K ohm 1/4W Variable Resistor 20K ohm

820 ohm 1I4W 8.2K ohm 1/4W

6.8K ohm 1/4W

3.9K ohm 1I4W

33 ohm 1/4W

3.3K ohm 1/4W

68 ohm 1!4W 220 ohm 1!4W 56 ohm 1/2W

33 ohm l!2W

15QKohm 1/4W 470 ohm l/4W V<.Jriable Resistor 1 M ohm Variable Resistor 1 OK ohm l20hm 1/4W

lOOK ohrn 1/4W

2_2K ohm 2W

100 ohm 1/4W lOOK ohm 1/4W 27 K ohm 1/4W

47MFD, 50V, Aluminum

150PF, SOV, Ceramic 10MFD, 250V, Aluminum

COOE

AA AC

AA

AA AA AC AD AA AA

AA

AA

AA AA AC AA

AA

AC

AA

AA AA AA AC AA AA

AA

AA

AA

AA

AA AA AA

AA

AA AA AD AD AA

AA

AA

REF. NO.

C2004

C2005 } C2045

C2006) C2031

C2007} C2013 C2008 C2009

C2010

C2011 ) C2012 C2014 C2015 C2016 C2017

C2018 } C2019

C2020} C2036 C2046 C2021 C2022

C2023 ) C2030 C2024 C2025 C2026 C2027 C2028

PART NO.

VCEAAU 1 CW478M

VCEAAU1CW108M

VCDYKU1HM333K

VCEAAU1EW475A

VCEAAU1AW227Y VCEAAUlCW226Y

VCSACU1VE105K

VCQY KU 1 HM332K

RC-EZ0029TAZZ VCEABA 1 CW226M VCEAAU1CW228M RC-EZ0027T AZZ

VCQYKU1HM153K

VCEAAU lCW227Y

VCDYKUIHM683K VCQYKU1HM223K

VCQY KU 1 HM 1 03K

VCEAAU1CW107Y VCQYKU1HM473K VCEAAU 1 EW335Y VCQYKU1HM123J VCQYKU1HM473J

C202g VCCSPR1H6101K

C2032} VCKZPR1HF103P C2043 1

C2033 C2034 C2035 C2037 C2038 C2041 C2042 C2044

C2047 ) C2050 C2048 C2049 C2001

VCDPSC2DA683K VCQPSC2DA333K

VCQPSC2DA 153K VCEAAU2AW227Y VCEAAU2EW105Y VCQYSU2JM 1 04K VCQYSU2JM 103K VCEAAU 1 HW475M

VCKZPR1HF102Z

VCTYPU1BD104Z VCEAAU1EW336Y VCEAAU lCW476Y

DESCRIPTION

4}OOMFD,16V,Aluminum

l.o00MFD,16V.Aluminum

0,033MFD, 50V. FHm

4.7MFD, 25V. Aluminum

220 MFD, ·1 QV, Aluminum 22MFD, 16V, Aluminum

lMFD, 35V, Tantalum

0.0033MFD, 50V. Film

22MFD, 16V, Aluminum 22MFD, 16V, Aluminum 2,200MFO, 16V, Aluminum 10MFD, 25V, Nonpalar Alum.

O.015MFO, SOY, Film

220MFD, 16V, Aluminurn

O.068MFD, SOY, Film 0.022MFO, SOY, Film

O.OlMFO. SOY, Film

100MFD, 16V, Aluminum O.047MFD, 50V. Film 3.3MFD. 25V, Aluminum D.012MFD, 50V. Film O.047MFO. SOY, Film 1 OOPF, SOV, Ceramic

0.01 MF. 50V, Ceramic

O.068MFD, 20DV, Film 0.033MFD, 2DDV, Filrn D.015MFO, 20DV, Film 220MFO.1DOV,Aluminu·m

lMFO: 250V, Aluminum O.lMFD, 630V, Film O.OlMFQ, 630V, Film 4.7MFO, SOY, Aluminum

1 ,OOOPF, 50V, Ceramic

O.lMFO, 12V. Ceramic 33MFD, 25V, Aluminum 47MF 0, l6V, Aluminum

C2052} VCEAAU1CW106Y lOMFO, 16V, Aluminum C2056 C2053 VCEAAU1C.W477M 470MFD, 16V, Aluminum

C2054 VCKYPU2HE103P O.OlMFD, 500V, Ceramic

C2055 VCQPSC2DA 104K 0.1 MFD, 200V, Film

COILS AND TRANSFORMERS

RTRNT0017TAZZ H-Drive Transformer

AH

AD

AB

AB

AB AB

AC

AA

AC AC AF AG

AB

AC

AB AB

AB

AB AB AB AB AB AA

AA

AB AB AB AF AC

•

• AE l AC • AB

AA

AB AB AB

AB

AC

AB AC

AF T2001 AA L\ T2002 AA

RTRNF,2105TAZZ· . FBT , ::> ~~~~:

AA

AC

AA AD

L2001 ACiLZ0057TAZ"L. L2002 RCiLB0031TAZZ

MISCELLANEOUS 1

2 3 4 5 6

PRDAF0147TAZZ PRD~F0107TAZZ

QSOCV0012VAZZ QPLGN0207CEZZ DSOCN009gPAZZ QPLGN0404CEZZ

-72-

H-Line Coil H·Hold Coil

Radiator (for IC2001) Radiator (tor 2 SC681A-R) CRT Socket 2·Pin Plug (tor Speaker) Lead Wire with 6-Pin Socket 4-Pin Plug Ifor Refrection Coil)

AG AG

AB AB AF AA AH AB

•


REF. NO. PART NO.

-CASSETTE TAPE RECORDER DESCRIPTION

PWB DPWB·0184PAZZ

INTEGRATED CIRCUIT

IC3001 } IC3009 RH·;X0038PAZZ

IC3002 } IC3003 RH.;X007. 5PAZZ IC3005 , IC3004 RH-iX0078PAZZ

IC3006 } IC3010 RH·;X0245PAZZ

IC3007 ) [C3011 RH-iX0079PAZZ

IC3008 RH·jX0040PAZZ

IC3101 RH-iX0220PAZZ IC3102 RH-iX0260PAZZ

Assembled Cassette Tape Recorder PWB Unit (Not replacement item)

SN7406N

SN74LS08N

SN74LS32N

SN74LS123N

SN74LS74AN

SN74121N SN75452BP LM374N


03001

I 03005

03007 VS2SC373GTM.l

i 03010 03013

03006 ) 03011 VS2SB7600//·1

03012 VS2SC2562Y /-1

~~gi~ j VS2SC1959Y/_l 03021 03022

03015 ) 03019 VS2SB762P//·l

03018 I 03020 VS2SB7610//·1

03001 } I VHD1S1586//1A

03003

D3004 } 03005 VHD1S188b//1A

03101 } I VHD1S1555//1A

03104

RESISTORS

R3001 ) R3008 VRO·RU2EE393J

R3002 R3007 R3009

R3010 VRD-RU2EE102J R3018 R3019 R3022

2SC373GTM

2SB7600

2SC2562Y

2SC1959Y

2SB762P

2S8761Q

lS1586

lS1885

lS15b5

39K ohm 1/4W

lKohml/4W

CODE REF. NO. PART NO.

R3003 R3005 R3011

I VRO·RU2EE221J R3014 R3037

AG R3040

R3004 } R3006 R3015 R3016· R3017

VRO·RU2EE223J

AE VRD·RU2EE392J

AF

AL VRO-RU2EE10:JJ

AG I AG

~~I

R3021 R3023 R3030

R3031 R3040 R3050

AC

AG

AH

AC

AH

AG

AB

AC

AA

AA

AA

R3020 R3024

R3025 }

R3i29 R3032

VRD·RU2EE333J VRD·RU2EE562J

VRO-RU2EE150J

VRD-SC2EF102J R3033 VRO·SC2EF680J R3034 ) R3045 VRD·RU2EE472J

R3035 ) R3044 VRD-RU2EE 12?J

R3036} R3043 VRD·RU2EE1L1J

R3038 } R3041 VRD-RU2EE222J

R3039 } R3042 VR['),RU2E:E822J

R3101 VRO-SC2EF471J R3102 VRO·SC2EF822J R3103 VRD·SC2EF473J

R3Q16 } VRD.SC2EF271 J R30117 -

~~~~~ } VRD~RU2EE2nJ R3052 VRD-SC2EF681J R3053

R3104 } R311Q

R3111

R3105 R3106

VRD·RlJ2EE681J

VRO-SC2EF472J

VRD-SC2EF224J VRD-ST2HF4JOJ

R3;Ol} R3109 VRD·SC2EF103J

R3115

R3112 VRD-SC2EF 153J

R3113 VRD-SC2EF154J R3114 VRO·SC2EF222J

R3116 } R3118 VRD SC2EF103G R3119 R3117 VRD·SC2EF205G R3120 VRD-SC2EF562G R3121 VRD·SC2EF560G RA3001 RMPTClO06PAZZ RA3002 RMPTC1005PAZZ

-73 -

DESCRIPTION

220 ohm 1/4W

22K ohm 1!4W

3.9K ohm li4W

lOK ohm 1/4W

33K ohm 1!4W 5.6K ohrn 1!4W

150hm li4W

1 K ohm 1!4W 68 ohm 1!4W

4,7K ohm 1/4W

1.7K ohm 1/4W

120 ohm 1!4W

2.2K ohm 1!4W

8.2K ohm 1/4W

470 ohm 1!4W S.2K ohm 1!4W 47K ohm 1!4W

270 ohm 1/4W

2.7K ohm 1!4W

680 ohm 1!4W 680 ohm 1/4W

4.7K ohln 1!4W

220K ohm 1!4W

47 ohm 1/2w

lOK ohm l/4W

15K ohm 1!4W 150Kohrn 1!4W 2.2K ohm 1!4W

lOK ohm (G) 1/4W

2M ohm (G) 1/4W

5.6K ohm (G) 1/4W 56 ohm (G) 1/4W

Resistor Array 2.?K ohm x 6 Resistor Array 10K ohm x 4

CODe

AA

AA

AA

AA

AA AA

AA

AA AA

AA

AA

AA

AA

AA

AA AA All

AA

AA

AA 1111

AA

AA AA

AA

AA AA AA

AA

AA AA AA AC AC


REF. NO. PART NO.

CAPACITORS

C3001 C3002 C3003 C3010 C3011

I C3014

C3004 } C3009. C3005 C3007 C3008 C3017 C3018 C3103 C3006 C3015 C3016 C3019

C3~20 I C3024 C3025 C3026 C3101

C3102 ) C3106 C3107

C3104) C3108 C3105 .

VCTYPUIEDI04Z

VCEALAIAE476M

VCKZPR1HF102P

VCEALA I HW105M VCEALA I HW104M VCEALAIAW107M RC-AZOOOl PAZZ

VCKZPR1HF103P

VCEAAU1CW107Y VCEAAU 1 EW107Y VCOYKU1HM103K

VCQYKU11 IM104K

VCEAAU lCW226Y

VCEAAU lCW476Y

MISCELLANEOUS

RYl I RY3 RRLYJ0028PAZZ

RY2 RRLYJ0027PAZZ

CN3001) CN3002 QPLGZ0020PAZZ

CN3003 QPL. GZ0088PI\ZZ

CN3004 QPl GN0511 CEZZ J300l OSOCN0085PAZZ

J3002 DSOCNOOB6PAZZ

J3003 DSOCN0080PAZZ

J3004 DSOCN0082P AZZ

J3005 DSOCN0081PAZZ

J3006 DSOCN0083PAZZ

DESCRIPTION

0.1 MFD, 25V, Ceramic

47MFD. 10V. Elec-Lytic

0.001 PFD, 50V, Ceramic

lMFD, 50V, Elec-Lytic 0.1 MFD, 50V, Elec-Lytic 100MFD, lOV, Elec-Lytir. 220,uF, 10V, Aluminum

O.OlMFD, 50V, Ceramic

100MFD, 16V, Aluminurn 100MFD, 25V, Alurninurn O.OlMFD, 50V, rilm'

O.lMFD, 50V, r=ilrn



Relay G2V

Relay G2E

3-Pin Tcrrninul

2-Pin Terminal 5-Pin Terminal Lead Wire with 6-Pin Socket

(for Keyboard) Lead Wire with 3-Pin Socket

,tfor LED) Lead Wire with 12-Pin Socket

(for CPU Board) Lead Wire with 6-Pin Socket

(tor Cilssette) Leao Wire with 9-Pin Socket

(for Cassette) Lead Wire with 3-Pjn + l-Pin

Socket Uor Power Supply)

• MONITOR TV & CASSETTE TAPE RECORDER MISCELLANEOUS

. "' 7 '\/BE2728B31/1E 8 VSP0080P-16YA 9 nCiLH4070TAZZ

10 DCABC8173PASA 11 GCABD8173PASA 12 LANGK0282PAZZ

. GRT . Speaker Reflection Coil Monitor TV Cabinet (Front) Monitor TV.Cabinet (Rear)

CRT Mounting Plate

CODE REF. NO.

AB

AB

AA

AB AB AC AF

AA

AB AB AB

AB

AB

AB

AN

AN

AD

AC AC AG

13

14 15 16 17 18 19 20

21 22 23 24 25 26 27 28

29 30 31 32 35 36 37 38 30 40 41 42 43 44 45 46 47 48 49 50 51

AE 52 53

AH 54

AG ob

AG

AF

PART NO.

DANG.QOI6PAZZ

PGUMS1007PAZZ JBTN,0037PASA JBTN-0050PA'SA MSPRC0014PAZZ MARMMOOOl PAZZ LANGK0311PAZZ DSOCN0112PAZZ

GCOVZ0007PAZZ RH·PX0048PAZZ DSOCN0102PAZZ HBDGB3002GESA HBDGB0003PAZZ LHLDF0006PAZZ LHLDW9062CEZZ LHLDW0007PAZZ MSPRTOOII PAZZ

KME KA0002PAZZ

DFTAC0003PASA LANGK0321PAZZ MSPRBQ036PAFJ PDMPOOOO1 PALZ DANG-0014PAZZ LANG K0283PAZZ LANG K0284PAZZ LANG K0285PAZZ LANG K0319PAZZ KCOUB0001PAZZ NBL T L0003PAZZ HDECA0031 PAS A DSOCN0100PAZZ RH-iX0257PAZ7 MCR K~OOOI PAZZ M LOKCOOOl PAZZ LANG K0320PAZZ LSFTZOOOBPAZZ RPLU·QOOI PAZZ MSPRT0002PAFJ DSOCNOl13PAZZ VH01S18R51/1A XPSSP25-10000 DSOCNOOO4PAZZ

LX-BZ0074PAZ7

DESCRIPTION

Monitor TV Cabinet Mountin!l Plate

Rubber Bush Reset Button Reset Button Spring for Reset Button

Arm

Arm Fixing Plate Lead Wire with 2-Pin Socket

(for Speaker) Smoky Panel

LED (for Cassette) Lead Wire with 3-Pin Socket SHARP Badge Badge Holder Wire Holder Wire Holder Spring for CRT earth

Cassette T upe A-ecorder Mechanical Unit

(Aefer to other table for detailed parts)

Flap Flap Fixing Plate Spring Damper Machinical Mounting Plate Mechinical MOlJnting Plate C

Machinical Mounting Plate A Machinical Mounting Plate-B PWB Mounting Plate Counter Counter Belt Decoration Plate Lead Wire with 3·Pin Socket DN6838 (HIC) Crank Lock Lever Lock Lever Fixing Plate Lock Lever Fixing Pin Plunger Coil Lock Lever Spring Lead Wire with 2-Pin Socket lS188b Sprirlg Pin (q, 2.5 x 10) Lead Wire with 5-Pin Socket

Ifor Cassette Head) Screw

••• KEY BOARD UNIT S~CTION * ••

BO AQ AW BB AZ AL

DKEY·0007PAZZ

MISCELLANEOUS

56 DANGK031BPAZZ 57 OSW·POOI6PAZZ

-74 -

Assembled Key Board Unit (Not replacement it8m)

Key Switch Fixing Plate

Push Switch (with LEO)

CODE.

AY

AD AC AC AB AN AB AD

AX AE AF AU AV AB AA AA AB

BR

AU AD AC AE AV AB AC AC AQ AM AB AA 4F AG AD AD AH AD AS AA AF AC AA AD

AA

AY AP

•

•

•

•


PART NO. DESCRIPTION CODE REF. NO. PART NO. OESCRIPTION COOE

69 70 71 72

QSW·POOI7PAZZ QSW-P0018PAZZ QSW·POOI9PAZZ LSTYM0008PAZZ PCUSGOOl QPAZZ

PGiDM0006PAZZ MLEVPQ005PAZZ

OSOCN0107PAZZ DSOCN0108PAZL DSOCN0109PAZZ

HPNLH0067VASA PCQVPG007PAZZ MSPRCOOl5PAZZ

RH·PX0049PAZZ DSOCNOI03PAZZ

Push Switch AE Push Switch AE Push Switch (with cushion) AD Stay for SPACE Key AB Cushion for ,SPACE Key AA Guide for SPACE Key AC Lever for SPACE Key AE Lead Wire with 4-Pin Socket AH Lead Wire with 6-Pin Socket AM lead Wire with 20-Pin Socket AT

Panel

Cover

Spring

LED

Lead Wire with 3-Pin Socket

AU AE AB AE AF

(Refer to separate list for PART NO. of keyboard.)

••• POWER SUPPLY UNIT SECTION •••

[)BOX D0028PAZZ Assembled Power Supply Unit (Not rep!<lcemcnt item)

INTEGRATED CIRCUIT

IC201

IC301) IC401)

RH-iX0231 PAZZ

R H-iX0151PAZZ

FS7905

SG3524N


0301 } Q401 VS2SAnO·Y 1·1 2SA770

Q302 } Q402 VS2SA673·C/l [ 2SA673C

0201 RH-[)XOO39TAZZ \i03C 0301 VHDS2VB101!-1 S2VB10

0302 ) 0303 VHOERB81-004/ ERB81·Q04

0401 VHDS5VB101/·1 S5VBIO

AP

AT

AH

AC

AC AG

AC;

Al

R304 } R404 VRD·SU2EF563J

R306 VRD·ST2EFI53J R307 VR 0·SU2EF332J

R308 ) R407 VRD·SU2EFIOIJ

R405 VRD·SU2EF222J R409 VRD·SU2EF392J

VR301 ) VR401 RVR·MOOIOPAZZ

CAPACITORS

56K ohm l/4W

15Kohrn 1/4W 3.3K ohm 1/4W

100 ohm 1/4W

2.2K ohm 1/4W

3.9K ohm 1/4W

Variable Resistor 1 K ohm

AA

AA AA

AA

AA AA

AC

&CiHe,)'-.'~_;: ", "::',' f-.~-,~" ':".,~",.),,_:c."~:_":", ~;",_",~,~:':4,~Ji:'l)M"..f!~~-'1~--'''t~ ,~~ Rc·Czoi80PAZZ " O.047M'Fb; 251iV';'~'(";" ;.' ,'Aj.l'

6C1Q,2 .,~,;;.: c "",., ,;,.,,_ ,'", ,"_,,',~ .. ;:, -'" ,:,;;,_,,,;...- .. ,_,1'_:"JI~,,,,,'i;':'.~~"i";,~:;;": .. ;';::';' ';";"9t'.~ C201 VCEAAU1CM228M 2,200MFD. 16V, Aluminum AE

C202 VCTYPU 1 ED104Z 0.1 MFD. 25V. Ceramic AB

C305 } C408 VCKYPU1NB104Z O.lMFO,12V,CeriJmic AB

C203 VCEAAU1AM107M 100MFO, 10V, Aluminum AC

C301 I C302

C3rt3 ) C40tJ

C304 ) C407

C306 ) C409 C307

C308! C406 C411

C309 ) C412

C401 }

VCEAAU 1 VM338M

VCQYKU1HM102K

VCEAAU lVM336M

VCDYKU1HM183K

VCEAAU 1 CM338M

VCQYKUIHM103K

RC·DZ0003PAZZ

VCEAAU 1 EM478M

3,300MFD, 35V, Aluminum

O.D01MFD, 50V, Film


O,018MFD, 50V, Film

3.300MFD, 16V, Alurninum

Q,OlMFD, 50V, Film

O.lMFO, lODV, Film

4,700MFD, 25V, Aluminum C4~4 C410 VCEAAU 1 AM688M 6,800MFD, 1 QV. Aluminum

COILS AND TRANSFORMER

6 LlDl, R,RNiooOSPAZZ "

LineCoir l301 ATRNZ0021 PAZZ Choke Coil l401 RTRNZOOO6PAZZ Choke Coil

.6. T1 01 RTRNPOO37PAZZ .. Power Supply Transformer

MISCELLANEOUS

'" SW101,·' QSW.COoOOPAZZ A.C. Switch

AC

AA

AB

AB

AG

AB

AB

AH

AG

'AL AQ

AR Bl'

~:>:AQ 0402 VH OESAC8204·1 ESAC82·Q04 AP 16 SO 101 QSOCAOOO3PAZZ Appliance 'I~ie'i -,'~'. ".,

/7\:. (or VHDSIOSC4M/·l ) 6 Fl0l r ~~~: ~ :~;~~:y;';;:~+,.j AF102 OFS·COOO6P AZZ AO

~~~-, RESISTORS '" F201 , QFS,COOO5PAZZ

'" F301 QFS·COOO3P AZZ 'AD 470 ohm 1!4W AA .6. .F.401} Fuse~ T 3.·i5~~':ih~~''-::>

",", R201 VRO·SU2EF471J " QFS;COOO4PAzZ

~;' ' ,~

R301 I '" F402 ,AD

.,~, __ ._'"C._ ._,,".' R401 VRD-ST2EF472J 4.7K ohm 1/4W AA 75 OFSHAOOOl PAZZ Fuse Holder AA R408 76 OPLGN0303CEZZ 3-Pin Terminal AB R3021 77 QPLGN0103CEZZ l-Pin Terminal AA R402 VR O-SU2EF472J 4.7K ohm 1/4W AA

78 OSOCN0098PAZZ Lead Wire with 4·Pin Socket AF

"'" ) 79 PRDAR0028PAZZ Radiator (A) AV R305 80 PRDAR0029PAZZ Radiator (8) AH R309 VRD·SU2I'F272J 2.7K ohm 1/4W

1 AA 81 PRDAROO30PAZZ Radiator (C) AE

R403 82 PR DAR0031 PAZZ Rildiiltor (D) AH R406 83 PR DAR0032PAZZ Radiator lE) AS

-75 -


84 85 86

PART NO.

GCABAB19SPAZZ GCABB8195PAZZ LANG K0317PAZZ

DESCRIPTION

Cabinet (A) (for Power Supply) Cabinet (8) {for Power Supply)

Radiato( Fixing Metal

CODE

BA AH AC

*** RAM (ill) (N) BLOCK UNIT SECTION ***

DPWB·0246PAZZ

INTEGRATED CIRCUIT

RAM RH-iX0145PAZZ

RESISTORS

Rll } VRD·SC2EF102J R4

CAPACITORS

Cl C3 CS C7 Cl0 C12 C14

C16 C17 C19

C21 J C23 C2 C4 C6 C8 C9 Cll C13 C15 C18 C20 e22.

C24

C25 }

c~o

VCTYPU18Dl04Z

VCTYPU1ED104Z

VCSACU1VE104M

MISCELLANEOUS

CNl } CN2

QPLGZOOBOPAZZ

QSOCZ0022PAZZ

Assembled RAM (m) ([V)

Block Unit (Not replacement item)

D·RAM 4116

1 K ohm 1/4W

O.lMFO, 12V,Ce~amic

U.1MFO, 25V, Ceramic

0.1 MFD, 35V, Tantalum

2O·Pin Terminal

16·Pin le Socket

BE

AA

/\B

I AB

AC

AD

AF

*** GRAPHIC RAM (J) UNIT SECTION ***

DPWB·0288PAZZ Assembled Graphic RAM Unit -(Not replacement item)

REF. NO. PART NO.

INTEGRATED CIRCUIT

RH·;X0265PAZZ

RH·iXQD83PAZZ

leg RH·iXOl04PI\ZZ

ICJlO}

le12 IC13 IC14

IC15

IC16

IC17

ICIS} IC20

IC19

le21

RH-iX0125PAZZ

RH·jX0124PAZZ RH·iXQ129PAZZ RH-iX0181 PAZ? RH.iX0074PAZZ

RH·iXQ127PAZ7

RH·jXOO78PAZZ

RH-iX0075PAZZ RH-iX0070PAZZ

RESISTORS

RI' } VRO-SC2EF102J

R4

R5 VRD-SC2EF470J R6 VRD·SC2EF101J

CAPACITORS

Cl

i CB C8 ClO

I C14 C7 C9 C15

VCTYPU180104Z

VCCSPR1 H6471 J

VCEAAU1 CW107Y VCCSPRl H6221J

MISCELLANEOUS

CNl CN2

DSOCZ0005P AZZ

QPLGZ0085PAZZ

DESCRIPTION

TMM2016 12K. S·RAM)

SN74LS157N

SN74LS42AN

SN74LS93N

SN74LS245N SN74LS165N SN74LS175N SN74LS04N SN74LS107N

SN74LS32N

SN74LS08N SN74LSOON

lK ohm 1!4W

47 ohm, 1!4W 100 ohm, l!4W

0.1 M FO, 12V .. Ceramic

470PF, 50V, Ceramic 100MFD, 16V, Alumiflum 22UPF, 50V, Ceramic

Lead Wire with SO-Pin Socket 10-Pin Plug

*** OTHER SECTION ***

,',

87 88 89 90 91 97 93

97

DCARA8173PASA GCABB8173PASA

DANG-OOl bPAZZ

PFT A·0005PASA PFTA0006PASA LANGK0298PAZZ LX BZ5002BCZZ TLABN0016PAZZ Q r ANN0002PAZZ

GLEGP0007PAZZ LBNDCOOOl PAZZ UBAGS0002PAZZ

oA~C80001PAiz OSW·PQ010PAZZ

Cabinet tomplete Cabinet Complete CPU Bourd Mounting Plate

Rear Cover E Rear Cover F I/O Connector Cover ScrfNII Function Label Frame Ground Terminal

Foot Cord Keeper

Ban AC Coref" Reset Switch

-76-

CODE

BP

AH

AH

AK

AR AQ AM AE

/\G

AF

AE /\E

AA

AA

•

•

AA •

A8

AA AB AA

BE AH

BR BG AX

AQ

AP AC AC AE /\H AB AC AW

•

ART NO.

DSOCN0101PAZZ

T;NSE0023PAZZ T;NSEO024PAZZ

TU'8Z0088PAZZ


DESCRIPTION

Instruction Manual (English)

Instruction Manual (English) I nstruction Manual (English)

Label for MantJal (English)

BB BA AB

For U.K. a label (TLABZ0088PAZZ) snail be stuck on the inside front cover. (as shown below)

Inside front cover of TINSE0022PAZZ

/ I

I I

\ TLABZOOB8PAZZ

ML-dUt:.U .... AH.:s LI:S I

MODEL MZ·80EU

REF. PART NO. DESCRIPTION CODE REF.

PART NO. DESCRIPTION CODE • NO. NO.

INTEGRATED CIRCUIT CN7.S DSOCZOOO6PAZZ Lead Wire with 40-Pin Socket BE (for Bus Line)

ICl ) 201 QSOCN0155PAZZ Lead Wire with 3-Pin Socket AD IC2 RH·iXOO75PAZZ SN74LS08N AE

(for Power Supply) 202 DANG·OO1BPAZZ I/O Code Fixing Metal AO

RESISTOR 203 LRALPOOOl PAZZ Guide R<Jil AF 204 LRALPOOO2PAZZ Guide Rail AE

RAI RMPTC1010P/\ZZ Resistor Army 1 K ohm x 4 AC 205 LRALPOOO3PAZZ Guide Rail AE RA2 RMPTC1011PAZZ Resistor Array 1 K ohm x 5 AC TiNSEOO25PAZZ Reference Card AD

MISCELLANEOUS

CI' } QSOCZOO21PAZZ 44-Pin Socket AW CN6 •

• MZ-80I02 PARTS LIST

MODEL MZ·80I02

REF. PART NO. DESCRIPTION CODE REF. PART NO. DESC R I PTI ON CODE • NO. NO.

INTEGRATED CIRCUIT RESISTORS

ICl ) RI VRO-SC2EF 1 02J 1 K ohm 1/4W AA IC2 RH-iXb190PAZZ. SN74LS266N I\F

RAI -RR-KZQ037PAZZ Resistor"Array 3.3K ohm x 7 AG IC3 RH-iX0104PAZZ SN74LS42N AH IC4 } CAPACITORS IC5

RH·iX0074PAZZ SN74LS04N Ac Cl VCEAAU'CW107Y 100MFD, leV, Aluminium AB IC6

} I RH-iXQ141PAZZ SN74LS125AN AK C2 }

C\I VCTYPU1BD104Z o.lMFD, 12V, Ceramic AB le9

'~1O ) RH-iX0181PALL SN74LS175N AM MISCELLANEOUS IC13

'~'4 } QSOCZOO16PAZZ 14-Pin le Socket RH·iXOO12PAZZ SN7404N AF QSW·DOOOI PAZZ Dip Switch

ICll 301 OPLGZQ081PAZZ 37-Pin Terminal (for Bus Lines)

302 LANG K0296PAZZ 37-Pin Terminal Fixing Metal AF

TiNSEOO20PAZZ Instruction Manual (English) AH

-78-

MZ-80GMK PARTS LIST

MODEL MZ·80GMK

PART NO. DESCRIPTION CODE REF. PART NO. DESCRIPTION NO.

TED CIRCUIT RESISTORS

RI } 1 K ohm 1/4W R2 V R D·SC2E F 1 02J RH~jXOO83PAZZ SN74LS157N AH

R3 V R D~SC2EF470J 47 ohm 1/4W R4 VRD~SC2EF101J 100 ohm 1/4W RH-iX0124PAZZ SN74LS245N AR

RH-iX0125PAZZ SN74LS93N AK CAPACITORS

RH-iX0129PAZZ SN74LS165N AD Cl VCEAAU1CW107Y 100MFD,16V, Aluminum

"' i RH-iX0265PAZZ TMM2016P 12K. S~RAMI BP C;2 C14 VCTYPU 1 BD104Z O.lMFD, 12V, Ceramic

RH-iX0127PAZZ SN74LS107N AG CJ6 RH-iXOO70PAZZ SN71LSOON AE C17 RH-iXOOJ4PAZZ SN74 LS04N AE C13 VCCSPR1H6471J 47QPF, 50 V, Ceramic

C15 VCCSPR1 H622!J 220PF, SO V, Ceramic RH-iXOO78PAZL SN74LS32N AF

Rfl-iX0104PAZZ SN74LS42N AH MISCELLANEOUS

CN! DSOCZOOO7PAZZ Lead Wire with lO-Pin Socket

ODE

AA

AA AA

AB

AB

AA AA

BA

I , , r .

MZ-80FI PARTS LIST

MODEL MZ·80FI

REF. PART NO. DESCRIPTION CODE REF. PART NO. DESCRIPTION 'CODE~ NO. NO.

INTEGRATED CIRCUIT R14 VRD·SC2EF183J 18K ohm 1/4W AA R15

ICl ·RH-iX0128PAZZ SN74LS20N AE R33 } VRD·SC2EF391J 390 ohm 114W AA

IC2 RH-iX0071 PAZZ SN74LS02N AE R17 } IC3 R30 VR D·SC2EF392J 3.9K ohm 114W AA

IC6 R18 VRD·SC2EF681J 680 ohm 1/4W AA

IC11 RH·;X0079PAZZ SN74LS74AN AG R19 V A D·SC2E F 152J 1.5K ohm 1/4W AA

IC19 R20 VAD·SC2EF470J 47 ohm 1/4W AA

IC25 A21 VRD·SC2EF561J 560 ohm li4W AA

le4 I RH-iXOQ74PAZZ A29 VRD·SC2EF103J 10K ohm 1/4W AA

ICll SN74LS04N AE R34 VRO-SC2EF473J 47K ohm 1/4W AA

IC5 RH-iXD124PAZZ SN74LS245N AA R35 VR D·SC2EF223J 22K ohrn 1/4W AA

IC7

} R39 VR D-SC2EF682J 6.8K ohm 1/4W AA

IC20 RH-iX0245PAZZ SN74LS123N AK RRl RMPTC1012PAZZ Resistor Array 4.7K ohm x 8 AD

IC26 RR2 RMPTC1D13PAZZ Resistor Array 150 ohm x 4 AC

IC8 } IC14 RH·;X0181PAZZ SN74LS1l5N AM VRl }

VR3 RVR·ZOO03PAZZ Variable Resistor 1 OK ohm AL

leg RH·iXOO7HPAZZ SN74LS32N AF VR2 RVR-ZOOD2PAZZ Variable Resistor 5Kn AL

lel0 ) IC15 AI1·;XOO70PAZZ SN74LSOON AE CAPACITORS le12

1 IC21 HH-iXD103PAZZ SN7438N AF Cl } le22 ClO VCOSMU1HM102J 1,OOOPF,50V, Film A.C

IC13 A H·iX0262PAZZ MB8866 (FDC) sW C2 VCQSMU1HM151J 150PF, 50V, Film AC

IC16 RH·;X0217PAZZ SN74145N AM C3 VCMZSU 1 HC220G 22PF,50V, AC

IC18 RH·;X0125PAZZ SN74LS93N AK C4 VCOYKU 1 HM472K O,Q047MFD, 50V, Film AA

IC23 RH-iX0102PA?7 SN74LS14N AM C5 VCOSMU1HM301J :mOPF, 50V, Film AC

IC24 RH-iXQ261PAZZ SN74LS51N AE C6 VCOY KU 1 HM223K O.022MFD, 50V, Film AB

C7 VCSACU1CE685K 6.8MFO, 16V, Tantalum AD

TRANSISTORS MJD DIODES CB VCSACUOJE476K 47MFD, 6.3V, Tantalum AF

C9 VCQSMU 1 HM222J 2,200PF, 50V, Film AC

TRl VS2SA1015GI1E 2SA) 015G AB Cll

} TR2

1 I

I VS?SC1815 B-/\ 2SC1815B AB C20 VCSACU 1 VE 1 06lV1 10MFD, 35V, Tantalum AE

TA4 C31

Dl

} C21

) i I VHD1S1586ii·l lS1586 AB 1

D7 C29 I. C3:7 VCTYPU1BD104Z O.lMFD, 12V, Ceramic AD

RESISTDRS 1 C43

Rl VRD-SC2EF101J lOOuhml/IlW AA ! C30 VCEAAU 1 CW107Y 100MFD, 16V, Aluminum AB

R2 R4 MISCELLANEOUS I

RS OSOCZ0012PAZZ llD-Pin le Socket (for MB8116) AH

RlO 401 OPLGZQQ81 PAZZ 37-Pin Terminal UDr Bus Lines) BH

Rll V R O-SC2E FIJ 72J 4.7K ohm 1!4W AA TPl ....... 9 OPLGZOO82PAZZ 9-Pin Terminal (for Test Point' AC

R22 402 LANGK0296PAZl 37-Pin Terminal Fixing Metal AF

I R28 R36 R38

R3 VRO-SC2EF222J 2.2K ohm 1/4W AA R9 R12 • R1J R16 V R D·SC2E r 102J 1 K ohm l//i,W AA R31 R32 R37

-80 -

MZ-80FB/MZ-80FBK,PARTS LIST

PART NO. OESCRIPTION

MODEL MZ-80FB/MZ-80FBK

••• POWER SUPPLY UNIT SECTION •••

DBOXD0029PAZZ

INTEGRATED CIRCUIT

IC1) IC2 RH·iX0151PAZZ

Assembled PO\lVElr Supply unit (Not replacement item)

SG3524


Q301} 0401 VS2SA892///_1 2SA892

0201 VHOS5VB10//_1 S5VB10

0301} 0302 VHDERB81-D04/ 0401 ERB81-004 or RK-14

0402

501 RH-PXOO33PAZZ LED

RESISTORS

R301 } R401

V R 0-ST2E F272J 2.7K ohm 1/4W

R302} R402

VRF-GV3DBR05K 0.05 ohm 2W

R303} R403 VRO-SU2EF563J 56K ohm 1/4W

R304} VRD-SU2EF272J 2.7K ohm 1/4W R404

R305} R405 VRO-SU2EF477J 4.7Kuhm 1/4W

R306} R406 VRO-ST2EF41LJ 4.7K ohm 1/4W R407 R307 VR D-ST2E F 153J 15K ohm 1/4W R308 VRO-SU2EF332J 3.3K ohm 1/4W R300 VRo-ST2EF102J 1 K ohm 1/4W R408 VR D-SU2E F392J 3.9K ohm 1/4W

VR301} VR401 RVR-MOO10PAZZ Vaciable Resistor 1 K ohm

CAPACITORS

~Cl01 J -d.b47MFD,~250V. .o_Cl02 . RC·CZ0180PAZZ

.Li1l8 Cal=?a~it~~_,

CL?,! VCEAI\Ul VM25BY 2,500MFD, 35V, Alurninum

C206) C207 RC-QZOO03PAZZ O.lMFD, 100V, Film

C30'} C401 VCKYPU1NB104Z O.lMFD, 12V, Ceramic

C302 VCQYKUl HM222K O.OO22MFD, 50V, Film =3) C403 VCOYKUl HM183K O.018MFD, !XlV, Film

<::304 VCEAAUl CM338M 3,300MFD, 16V. Aluminurrl

---

REF. PART NO. DESCRIPTION NO.

C305} C406 VCQYKU1HM102K O_OOlMFO, 5OV, Film

C3G6} -:< "

C307 C407 VCSACUl VE106M lOMFO. 35V, Tantalum

S C409 _ ... , .... - "

C308 VCOYKUlIlM682K ·O.OO68MFD, 5OV, Film

C402} C405 VCQYKU1HM332K O.OO33MFD, 5OV. Film

C404 VCEAAUl AM338M 3,300MFD. 10V, Aluminum

COl LS AND TRANSFORMER

AN

AL L3Gl} L402 L401

AT A NZQO)7PAZZ

RTRNZOOO9PAZZ

AG MISCELLANEOUS

AA

OSOCN0065PAZZ AD

OP LGZOO50PAZZ AA 507 PRDAROo21PAZZ

PROAROO22PAZZ AA 509 LANGK0270PAZZ

AA 51 () LANGOO022PAZZ 511 LANGQ0023PAZZ

PSPA KOOO5VAZZ

••• DISK DRIVE

RMEMR0001 PAZ?

9bAF140622-01 AC 95AF 120138-01

95AF 140630-01 95AF120151-01

95AF140640-01 95AF130?46-01

Coil

Coil

Connector Lead Wire with 2-Pin

Connector (for LE 2-Pin Plug (for LEO) Radiation Plate Radiation Plate (for D201)

Switch, Inlet, Filter PWB

PWB Fixing Angle PWB Fixing Angle LED Specer

UNIT SECTION •••

Assembled Disk Drive Unit (Not replacement itern)

Belt PWB Unit Ass'y

I ndex Lamp Ass'y Medium Guide L As~'y (with

Write Protect Sensor, L']lnp) Operation indicator Drive Motor Ass'y

(with Motor Control PWB)

AF ••• OTHER SECTION ••• AB

519 GCABA8121 PASS Cabinet AB 520 GWAKPOOO6PASA Front Frilme

521 LCHSMOO97PASA Chassis (for MZ-BOFB) 522 LCHSMOO9SPASA Chassis (for MZ-80FBK)

AB 523 GLEGROOO1PAZZ Foot

AG 524 TLABZOO2gPAZZ Drive Number Lavel DRIVE 1 (for MZ.sQF B)

-81 -

CODE

AB

AE

AA

AB

AF

AQ

AM

AE

AC AT AD AF

AD AE AA

BA ••

BL BN

AZ RY

SF AR BH BH AB AB

REF. pART NO. NO.

525 TLABZOO33PAZZ

526 TLABZOO34PAZZ

527 TLABZOO35PAZZ

528 LANG FOO17PAZZ

529 LANGFOO23PAZZ

530 LX·BZOO75PAZZ

531 DSOCNOl14PAZZ

532 DSOCN0115PAZZ

533 QTANNOOO2PAZZ DTiPOO46PAZZ OTiP-0047PAZZ

PARTS LIST OESCRIPTION

I Drive Number Label DRIVE 2 AB

REF. NO.

534

PART NO.

LHLDF0015PAZZ

OESCRIPTION

Filter PWB Fixing Holder AC

535 LHLDWO006PAZZ Flat Cable Fixer AD Ifor MZ·80FB) Drive Number Label DRIVE 3 AB 536 LHLDW9003CEZZ Cord Fixer, HW~146 AA

(for MZ-SOFBK) 537 LBNDCOOO3PAZZ Wire Band AB

Drive Number Label DRIVE 4 AB 1 "i538jjlln~P~C;U~S~GiOiiOilOii5iPAiliZIiZ.llijii5IiXI1iiOiiOixiiit1ii·IiO.III •• A,.A. Ifor MZ·80FBK) I'

Drive Fixing Angle AE 539 LX-BZOO67PAFN Screw for Disk Drive AG Front Frame Fixing Angle AM 540 LX-BZOO68PAFN Screw for Disk Drive Fixing AH

Screw (for Flat Cabbie Ass'y) AG Angle

Flat Cable Ass'y Ifor MZ.aOFB)

BP

Flat Cable Ass'y BU Ifor MZ·BOFBK)

Ground Terminal AH Braided Wire (for MZ-80FB) AN Braided Wire (for MZ-80FBKl AN

MZ.aOBH

IA810504KSi

•

•

•

• Printed in Japan

-82-

Personal Computer - Sharp MZCPU System Bus 0. 0 00 I ZSOA f-' xN w~ Printer t Printer Interface IMZ-SOP5') FD Interface 1 Floppy f-(MZ-SOFIJ Disk I (MZ-SOFB/FBKI Key Board I HD I I

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