HCD-GRX2/RX33 US Model Canadian Model HCD-RX33 E Model Australian Model HCD-GRX2 SERVICE MANUAL MINI Hi-Fi COMPONENT SYSTEM MICROFILM HCD-GRX2/RX33 is the tuner, deck, CD and amplifier section in MHC-GRX2/RX33. — Continued on next page — SPECIFICATIONS Model Name Using Similar Mechanism HCD-G101 CD Mechanism Type CX3 Base Unit Type KSM-213BCM Optical Pick-up Type KSS-213B/S-N Model Name Using Similar Mechanism HCD-G101 DECK-A TK20FX-SW943-800 DECK-B TK20FX-SW943-800 CD SECTION TAPE DECK SECTION Tape Transport Mechanism Type AUDIO POWER SPECIFICATIONS: (U.S.A. model only) POWER OUTPUT AND TOTAL HARMONIC DISTORTION: with 6 Ω loads both channels driven, from 70 – 20,000 Hz; rated 25 W per channel minimum RMS power, with no more than 0.9% total harmonic distortion from 250 mW to rated output. Amplifier section North American model Continuous RMS power output 35 W + 35 W (6 Ω at 1 kHz, 10% THD) Other models The following measured at AC 110, 220 V 60 Hz; DIN power output (Rated) 25 W + 25 W (6 Ω at 1 kHz, DIN) Continuous RMS power output (Reference) 30 W + 30W (6 Ω at 1 kHz, 10% THD) The following measured at AC 120, 240 V 60 Hz; DIN power output (Rated) 30 W + 30 W (6 Ω at 1 kHz, DIN) Continuous RMS power output (Reference) 35 W + 35W (6 Ω at 1 kHz, 10% THD) Peak music power output (Reference) 400 W Outputs PHONES (stereo phone jack) : accepts headphones of 8 Ω or more SPEAKER : accepts impedance of 6 to 16 Ω CD player section System Compact disc and digital audio system Laser Semiconductor laser (λ = 780 nm) Emission duration: continuous Laser output Max. 44.6 μW* *This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture. Frequency response 20 Hz – 20 kHz (± 0.5 dB) Wavelength 780 – 790 nm Tape deck section Recording system 4 -track 2 -channel stereo Frequency response 60 – 13,000 Hz (± 3dB), using Sony TYPE Ι cassette Photo : HCD-GRX2
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HCD-GRX2/RX33US Model
Canadian ModelHCD-RX33
E ModelAustralian Model
HCD-GRX2
SERVICE MANUAL
MINI Hi-Fi COMPONENT SYSTEM
MICROFILM
HCD-GRX2/RX33 is the tuner, deck, CDand amplifier section in MHC-GRX2/RX33.
— Continued on next page —
SPECIFICATIONS
Model Name Using Similar Mechanism HCD-G101
CD Mechanism Type CX3
Base Unit Type KSM-213BCM
Optical Pick-up Type KSS-213B/S-N
Model Name Using Similar Mechanism HCD-G101
DECK-A TK20FX-SW943-800
DECK-B TK20FX-SW943-800
CD
SECTION
TAPEDECK
SECTIONTape TransportMechanism Type
AUDIO POWER SPECIFICATIONS:(U.S.A. model only)POWER OUTPUT AND TOTAL HARMONIC DISTORTION:with 6 Ω loads both channels driven, from 70 – 20,000 Hz; rated 25 W perchannel minimum RMS power, with no more than 0.9% total harmonicdistortion from 250 mW to rated output.
Amplifier sectionNorth American modelContinuous RMS power output
35 W + 35 W (6 Ω at 1 kHz, 10% THD)
Other modelsThe following measured at AC 110, 220 V 60 Hz;DIN power output (Rated) 25 W + 25 W (6 Ω at 1 kHz, DIN)Continuous RMS power output (Reference)
30 W + 30W (6 Ω at 1 kHz, 10% THD)
The following measured at AC 120, 240 V 60 Hz;DIN power output (Rated) 30 W + 30 W (6 Ω at 1 kHz, DIN)Continuous RMS power output (Reference)
35 W + 35W (6 Ω at 1 kHz, 10% THD)Peak music power output (Reference)
400 W
OutputsPHONES (stereo phone jack) :
accepts headphones of 8 Ω or moreSPEAKER : accepts impedance of 6 to 16 Ω
CD player sectionSystem Compact disc and digital audio systemLaser Semiconductor laser (λ = 780 nm)
Tape deck sectionRecording system 4 -track 2 -channel stereoFrequency response 60 – 13,000 Hz (± 3dB), using Sony
TYPE Ι cassette
Photo : HCD-GRX2
— 2 —
CAUTIONUse of controls or adjustments or performance of proceduresother than those specified herein may result in hazardousradiation exposure.
Notes on chip component replacement• Never reuse a disconnected chip component.• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing• Keep the temperature of soldering iron around 270˚C
during repairing.• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).• Be careful not to apply force on the conductor when soldering
or unsoldering.
Laser component in this product is capable of emitting radiationexceeding the limit for Class 1.
This appliance is classified asa CLASS 1 LASER product.The CLASS 1 LASERPRODUCT MARKING islocated on the rear exterior.
This cautionlabel is locatedinside the unit.
SERVICING NOTE
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCKOR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostaticbreak-down because of the potential difference generated by thecharged electrostatic load, etc. on clothing and the human body.During repair, pay attention to electrostatic break-down and alsouse the procedure in the printed matter which is included in therepair parts.The flexible board is easily damaged and should be handled withcare.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused onthe disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission,observe from more than 30 cm away from the objective lens.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITHMARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTSLIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESECOMPONENTS WITH SONY PARTS WHOSE PART NUMBERSAPPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTSPUBLISHED BY SONY.
Mass Approx. 7.2 kg (15 lb 14 oz.)Supplied accessories: AM loop antenna (1)
Remote RM-SG5 (1)FM lead antenna (1)
Design and specifications are subject to change without notice.
ATTENTION AU COMPOSANT AYANT RAPPORTÀ LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE ! SUR LESDIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONTCRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NEREMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONYDONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OUDANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
— 3 —
SAFETY CHECK-OUT
After correcting the original service problem, perform the followingsafety checks before releasing the set to the customer:Check the antenna terminals, metal trim, “metallized” knobs, screws,and all other exposed metal parts for AC leakage. Check leakage asdescribed below.
LEAKAGEThe AC leakage from any exposed metal part to earth Ground andfrom all exposed metal parts to any exposed metal part having areturn to chassis, must not exceed 0.5 mA (500 microampers).Leakage current can be measured by any one of three methods.1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use theseinstruments.
2. A battery-operated AC milliammeter. The Data Precision 245digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of aVOM or battery-operated AC voltmeter. The “limit” indicationis 0.75 V, so analog meters must have an accurate low-voltagescale. The Simpson 250 and Sanwa SH-63Trd are examples ofa passive VOM that is suitable. Nearly all battery operateddigital multimeters that have a 2V AC range are suitable. (SeeFig. A)
To Exposed Metal Parts on Set
0.15 µF 1.5 kΩACVoltmeter(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
TABLE OF CONTENTS
1. GENERAL .......................................................................... 4
2. DISASSEMBLY2-1. CD Door ............................................................................. 52-2. CD Mechanism Deck ......................................................... 52-3. Front Panel ......................................................................... 62-4. Main Board and H.P Board ................................................ 62-5. CD Tray .............................................................................. 72-6. CD Decoder Board ............................................................. 72-7. Base Unit ............................................................................ 82-8. Cassette Lid (L)/(R) ............................................................ 8
r (recording)( (play)0 (fast rening)) (fast forward)p 6 (stop/eject)P (pause)
7
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1 2 3 4 5 6
9
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— 5 —
SECTION 2DISASSEMBLY
Two craws
1 Pull out the CD tray and remove the CD door with releasing claws into the direction of arrow.
2 CD door2-1. CD DOOR
Note : Follow the disassembly procedure in the numerical order given.
6 CD mechanism deck
1 Two screws (+B 3 × 8)
3 Two screws (+BVTP 3 × 10)
2 Screw (+PTPWH 3 × 10)
2 Screw (+PTPWH 3 × 10)
4 Flat type wire (CN09) 5 Harness (CN302)
2-2. CD MECHANISM DECK
— 6 —
7 Screw (+PTPWH 3 × 10)
3 Screw (+BVTP 3 × 10) 4 Screw (+BVTP 3 × 10)
5 Two screw (+BVTP 3 × 10)
6 Two screws (+BVTP 3 × 10)
7 Screw (+PTPWH 3 × 10)
8 Screw (+BVTP 3 × 10)
2 Three screws (+BVTP 3 × 10)
1 Connector (CN401)
9 Front panel
HOW TO SET THEPOWER CORD
power cord
1 Harness (CN303)
8 H.P board
2 Harness (CN204)
3 Connector4 Connector (CN202)
5 Connector (CN201)
7 MAIN board
6 Two screws (+KTP 3 × 8)
Craw
2-3. FRONT PANEL
2-4. MAIN BOARD AND H.P BOARD
— 7 —
1 Screw (+P 2.6 × 4)
2 Bracket
4 Bracket
5 Flat type wire (CN06)
3 Screw (+P 2.6 × 4)
6 CD tray
1 Two screws (+BVTP 3 × 10)
2 Two screws (+BVTP 3 × 10)
Two craws
7 CD DECODER board
3 Belt
6 Flat type wire (CN06)
5 Flat type wire (CN01)
4 Connector (CN05)
!º Connector (CN03)
8 Two screw (+BVTP 3 × 10)
9 Sheet
Craw
Craw
2-5. CD TRAY
2-6. CD DECODER BOARD
— 8 —
2 Screw (+PTPWH 2.6 × 8)
3 UD-gear
4 Screw (+PTPWH 2.6 × 8)
5 UD-Cam
8 Spring
7 Spring
6 Spring
1 Two screws (+KTP 3 × 8)9 Base unit
Four craws
Four craws
2 Cassette lid (R)
1 Cassette lid (L)
2-7. BASE UNIT
2-8. CASSETTE LID (L) / (R)
— 9 —
Precaution1. Clean the following parts with a denatured alcohol-moistened
swab:record/playback head pinch rollerserase head rubber beltscapstan idlers
2. Demagnetize the record/playback head with a headdemagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.4. After the adjustments, apply suitable locking compound to the
parts adjusted.5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Measurement
SECTION 3MECHANICAL ADJUSTMENTS
Meter reading40 to 70 g • cm
(0.56 - 0.97 oz • inch)
1 to 5 g • cm(0.01 - 0.07 oz • inch)
55 to 140 g • cm(0.76 - 1.94 oz • inch)
Torque
FWD
FWDback tension
FF/REW
Torque meter
CQ-102C
CQ-102C
CQ-201B
SECTION 4ELECTRICAL ADJUSTMENTS
1. Demagnetize the record/playback head with a headdamagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.3. After the adjustments, apply suitable locking compound to the
parts adjusted.4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.5. The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustmentshould be completed before performing recording circuitadjustment.)
6. The adjustments should be performed for both L-CH and R-CH.
Record/Playback Head Azimuth Adjustment(Deck A, Deck B)
Note: Perform this adjustments for both decks.
Procedure:1. Mode : Playback
DECK SECTION 0 dB=0.775V
TapeP-4-A100WS-48B
Signal10 kHz, –10 dB
3 kHz, 0 dB
Used forAzimuth Adjustment
Tape Speed Adjustment
test tapeP-4-A100(10kHz, –10dB)
SPEAKERterminal (JK501)
level meter
+
–
set
— 10 —
2. Turn the adjustment screw and check output peaks. If the peaksdo not match for L-CH and R-CH, turn the adjustment screwso that outputs match within 2 dB of peak.
3. Mode: Playback
4. After the adjustments, apply suitable locking compound to theparts adjusted.
Adjustment Location:Remove the cassette lid before adjustment (See page 8)
test tapeWS-48B(3kHz, 0dB)
Tape Speed Adjustment (Deck A)
Procedure:1. Mode: Playback
2. Adjust the SFR201 so that the frequency counter reads 3,000Hz ± 90Hz.
Adjustment Location: MAIN board
Sample Value of Wow and flutterW. RMS (JIS) within 0.3%(test tape: WS-48B)
[MAIN BOARD] — Component side —
CN204
L-CHpeak
R-CHpeak
screwposition
outputlevel
within2dB within 2dB
L-CHpeak
screwpositionR-CH
peak
test tapeP-4-A100(10kHz, –10dB)
SPEAKERterminal (JK501)(L-CH)
set
L
R
oscilloscope
SPEAKERterminal (JK501)(R-CH)
Waveform of oscilloscope
in phase 45˚ 90˚ 135˚ 180˚
good wrong
SPEAKERterminal (JK501)
set
frequency counter
+–
SFR201Tape Speed
Adjustment screwsREC/PB head (deck A)or PB head (deck B)
— 11 —
TUNER SECTION 0 dB=1µV
AM Tuning Voltage Adjustment
Procedure:1. Set the reception frequency of the unit to 530 kHz.2. Adjust L105 for 1.2 ± 0.05 V reading on the DC voltmeter.3. Set the reception frequency of the unit to 1,710 kHz.4. Confirm that the voltage reading on the DC voltmeter is within
8.0 ± 0.5 V.
Adjustment Location: MAIN board (See page 12)
AM Tracking Adjustment
Procedure:1. Tune the set to 600 kHz.2. Set the output of AM RF SSG so that the input level of the set
will become 60 dB (µV/m).3. Adjust L104 so that when the waveform on the oscilloscope is
maximum, no noise appears.4. Tune the set to 1,400 kHz.
5. Adjust TC102 so that when the waveform on the oscilloscopeis maximum, no noise appears.
• Repeat the procedures in each adjustment several times, and thetracking adjustment should be finally done by the trimmercapacitors.
Adjustment Location: MAIN board (See page 12)
FM Tuning Voltage Adjustment
DC voltmeter
Procedure :1. Set the reception frequency of the unit to 87.5 MHz.2. Adjust L103 for 1.2 ± 0.05V reading on the DC voltmeter.3. Set the reception frequency of the unit to 108 MHz.4. Confirm that the voltage reading on the DC voltmeter is within
7.8 ± 0.5V.
Adjustment Location: MAIN board (See page 12)
TP1
+
IFGVT
Main board
DC voltmeterMain board
–
FGVT
TP1
+
–
AM RF SSG
loop antenna
set
loop antenna(Supplied accessories)
60 cm AM ANTENNAterminal (TM1)30% amplitude
modulation by400 Hz signal Field strength dB (µV/m) =SSG output level dB (µV/m) –26 dB.
— 12 —
FM Tuned Level Adjustment
set
Procedure:1. Supply a 28 dB 98 MHz signal from the ANTENNA terminal.2. Tune the set to 98 MHz.3. Adjust SFR101 to the point (moment) when the TUNED
indicator will change from going off to going on.
Adjustment Location: MAIN board
FM Tracking Adjustment
Procedure:
1. Tune the set to 90 MHz.2. Adjust L102 so that when the waveform on the oscilloscope is
maximum, no noise appears.3. Tune the set to 106 MHz.4. Adjust TC101 so that when the waveform on the oscilloscope
is maximum, no noise appears.
• Repeat the procedures in each adjustment several times, and thetracking adjustment should be finally done by the trimmercapacitors.
deviation (100%)Output level : 28 dB (at 75 Ω open)
FM ANTENNA terminal(JK101)
75 Ω coaxial
FM ANTENNA terminal (JK101)SPEAKER terminal (JK501)
FM RF SSG
set
oscilloscope
— 13 —
IC03VR02
VR01
R07
IC01
CN12
Focus Gain
Focus Bias
RF Level
CD SECTION
Note:1. CD Block is basically constructed to operate without
adjustment. Therefore, check each item in order given.2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.3. Use an oscilloscope with more than 10MΩ impedance.4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with thefollowing checks.
5. Adjust the focus bias adjustment when optical block is replaced.
Focus Bias Adjustment
RF Level Check
Procedure :1. Connect oscilloscope to test point TP (RF) on CD DECODER
board.2. Turned Power switch on.3. Put disc (YEDS-18) in and playback.4. Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.Note: Clear RF signal waveform means that the shape “◊” can be
clearly distinguished at the center of the waveform.
oscilloscope
level: 1.0 Vp-p
VOLT/DIV: 200 mVTIME/DIV: 500 nS
+0.3–0.2
Adjustment Location: CD DECODER board
Procedure:1. Connect DC voltmeter to test point CN12 (FEO), (VC) on CD
DECODER board.2. Turned Power switch on.3. Put disc (YEDS-18) in and stop.4. Adjust VR01 so that the DC voitmeter reading is 0 ± 20 mV.
Adjustment Location: CD DECODER board
Focus Gain Adjustment (VR02)
This gain has a margin, so even if it is slightly off.There is no problem.Therfore, do not perform this adjusment.Please note that it should be fixed to mechanical center positionwhen you moved and do not know original position.
Adjustment Location
[CD DECODER BOARD] — Component side —
CD DECODERboard
CN12
FEOVC
DC voltmeter
+
–
CD DECODERboard
TP (RF)CN12 (VC)
— 14 —
SECTION 5DIAGRAMS
5-1. CIRCUIT BOARDS LOCATION
SW (C) board
SW (D) board
SW (B) board
DISK board
PANEL board
CD DECODER board
H.P board
SENSOR board
R/P SWITCH board
VR board
AC POWER board
MAIN board
SW (A) board
MOTOR board
MOTOR (6P) (S) board
HCD-GRX2/RX33
5-2. BLOCK DIAGRAMS
— DECK SECTION —
— 15 — — 16 —
HP901PB
HEAD
TAPE B
HRP901REC/PBHEAD
TAPE A
R CHR CH
R CH
PLAY/RECCONTROL
Q203, 205
PLAY/RECCONTROL
DRIVE
Q207
MUTESWITCH
Q216
TAPE A/BSWITCH
Q213
PLAY/RECCONTROL
D209
L201BIAS OSC
BIASOSC
Q218
HE901ERASEHEAD
R CH
1
2
9
3
REC OUT
PB OUT
A/B
5
19
11
10
REC/PBEQ AMP
IC201
TAPE A/B
Q209
MUTE
TAPE ASWITCH
Q214
Q211
Q220REC SWITCH
MUTECONTROLQ
Q217
D205 D203
D202
D212
D210
D211
D210
S201A DECK
S202B DECK
S203PLAY
M
D207D206
M901REC/CAPSTAN
MOTOR
TAPE SPEED
SFR201
+11.5V
D208
SW201REC/PLAY
PLAY
REC
: FM
: CD
• Signal Path
• RCH is omitted
BCD
SECTION
TU L
11
9
Q301
10
ST IND
TU MUTE
DO
CD L
12
CONTROL
3 2
1
CLK
14
DI
15
CE
13
SELECTORIC301
CLK
DI
CE
LINE AMPIC302
75
BASS BOOSTSWITCH
Q307 Q303
MUTE
13 2
7 4
POWER AMPIC501
SPEAKERRELAYDRIVE
Q551
Q553
1
2
6
IC502IC502
RL501
R CH
SPEAKER
PHONES
JK501
JK303
SCOR
SENS
SQSO
XLAT
SQCK
DATA
DI
CLK
CE
STB
26
ST
B
21
CE
22
CLK
23
DI
18
DA
TA
17
SQ
CK
20
XLA
T
19
SQ
SO
51
SE
NS
38
SC
OR
MUTEDRIVE
Q583,584
Q604
MUTE
MUTESWITCH
Q603
CD SYNCSWITCH
Q208
4
TU
MU
TE
24
DI1
48
SY
S R
EC
7
DB
FB
3
SY
ST
EM
MU
TE
2
PO
WE
R
LED DRIVEIC602
2
3
4
36
ALA
TC
H
11
13 LEDDRIVE
DI
CLK
Q208
Q605,606
RESETSWITCH
POWERDOWN DET
Q601
10
RE
SE
T
15
PO
WE
R D
OW
N
Q602
LED602
LED601
Q602
D602
X2
11
X1
12
VR
UP
44
X6014.19MHz
VR
DO
WN
45
VR601ENCODER
PIC
UP
55
PIC
DO
WN
56
TR
AY
OP
EN
59
TR
AY
CLO
SE
60
TU
RN
TA
BLE
58
DIS
C C
OU
NT
57
A B
S02TRAY
OPEN/CLOSEDET
S03DISC
COUNTERDET
S04TURNTABLEOPERATION
DET
S01CD DECKUP/DOWN
DET
3
2
Q601
RM601
REMOTECONTROLRECEIVER
39
RE
MO
TE
64 78
KEYMATRIX
S601-623
P1 P21
100 86
G1 G15. 81 8533 29
KI0 KI4
FLD601FLD DISPLAY
SYSTEM CONTROLLER/FLD DRIVER
IC601
+5.6VREG
Q404
SITCHING
Q406,407
+11.5V(SWITCHED)
+11.5V FILTER
Q402
+7.9VREG
Q403
+7.9V+12VREG
Q401
RECT
D405-408
MUTE
Q585,586
P MUTECONT
Q409
AC OFFDET
Q410
D417
D416
D553
RECT
D401
D409
-12V
-30V
+30V
-27VREG
Q408
-27VVOLTAGEDOUBLER
D414,415
ACIN
PT001
AC3.4V
AC3.4V
1216
ATUNER
SECTION
: PB (DECK A)
: PB (DECK B)
: REC (DECK A)
Q207
Q201
CE
CLK D
I
COUNT
FOK
52
FO
K
53
CO
UN
T
47
FM
ST
IND
HCD-GRX2/RX33
— TUNER/CD SECTION —
— 17 — — 18 —
CE
19
12
5
3
4
2
24
1
PLLIC103
FM
XO
XI
CLK
DI
DO
CE
CLK
DI
DO
OPTICAL PICK-UPBLOCK
APC
Q01
38
+5V
VC
LD
GND
A
C
B
E
F
FOCUSCOIL
F+
F
T+
T
TRACKINGCOIL
33
34
39
36
35
48
APC
FOCUS PHASECOMPENSATION
DECODER
SERIAL/PARALLEL
CONVERTER
FEAMP
RFAMP
IIL
TTL
TTL
IIL
COMAND
VC
TRACKING PHASECOMPENSATION
LD
PD
E
F
PD1
PD2
6
24
23
20
19
22
21
31
25
SENS
RFO
FOK
C OUT
DATA
XLT
CLK
XRST
13FEO TAO
IC03
T.T/TRAY MOTORDRIVER
CD RF/SERVOPROSSESOR
IC01 (1/2)
4
5T IN
3
2
1
VR
PDPD
18
17
20
19
6F IN
22SL IN
13T.T F IN
F+
F
T+
T
SL+
SL
SP+
SP
M
M
MOTOR
M102SLED
MOTOR
M101SPINDOL
EFMDEMO.
XRST
CLVSERVO
DIGITALCLV
D/AI/F
SUB CODEPROSSESOR
CPU I/F
9 11 5 4 7 61
MDP
SE
NS
SC
OR
SQ
SO
SQ
CK
CLO
CK
DA
TA
CLK
XLT
DAT
SE
CN
FOK
RF
SERIALI/F
PWM
PWM 70
69
73
74
NL
L
XTA1
XTA0X701
MU
TE
R-CH
CD DIGITALSIGNAL PROCESSOR
IC04
16
:FM
:CD
• SIGNAL PATH
14
7
8
4
2
1
6
10
DETECTOR
16
OSC
FM75Ω
AM
ANTENNA
JK101
D101
L101FM ANT
L102FM RF
3
1 RF MIX 6
8
FM FRONT ENDIC101
RF IFAMP
Q101CF10110.7MHz
T101 CF10210.7MHz
FM OSCAMP
Q102
D103
L103
L105MW OSC
IF
G
VT
AM/FMTUNING
VOLTAGE
TP1
L104AM ANT
AM RFAMP
Q104
MPX16
FM IF1
OSC23
AFC22AM RF21
FMIF
AF DET18
FMDET
AM/FMIF BUFF
AMOSC
AMMIX
AMDET
SM
ET
20
CF103450kHz
MUTE
AGC
AMIF
DECODER14
L
15R
4
2
T102AM IFT
8FM DET
17MPX VCO
CF10410.7MHz
CF10519kHz
R CH
FM/AM MPXIC102
L.P.F
Q105,106
FMTUNEDLEVEL
PD121
X2017.2MHz
FM B+17
TUB+
B+
Q103
PL
DE
T
13
18AM
OSC/FMSD24B+
7SD
PH
DE
T
11
PH
DE
T
12
14ST/MONO
TU
LE
D
6
13AM/FM
SD
15L CTR
16R CTR
7ST IND
10AM/FM
MUTE
Q109
TU L
ST IND
TU MUTE
DO
AMAIN
SECTION
D5
LD ONSWITCH
Q02LD
PD
F/T COILSL/SP MOTOR
CN12
CN2
ATSC45
FEO1
TEO42
FOCUSTRACKING
37 40FE BIAS EI
RV01
FOCUSGAIN
RV02
14
15
30
31
T.T+
T.T
TR+
TR
M
M
MOTORT/T
MOTORTRAY
21SP IN
29TR F IN
12T.T R IN
28TR T IN
27MUTE IN
IC06
IC01 (2/2)
67
REG
Q119REG I
10REG B
11REG OUT
7VCC
8VCC
+5V
+7.5V
XRST6
SPEED11
CONTRL5SWITCH
Q04
13
14
TR+
TR
7
14
T.T+
T.T
4MUTE
2DATA
3CLOK
1STB
IC02
MOTOR DRIVEREG CONTROL
T.T/TRAY
36
23
14
13
15
16
17
8
25
18
SP
OA
LIMITSWITCH
S05
10
XLA
T
CLOCKGEN.
PWM
PWM 77
78
NR
R
22
XLO
N
13
2IC05
MIX AMP
MUTE
Q311
CD L
SCOR
SENS
SQSO
XLAT
SQCK
DATA
CE
STB
CLK
DI
BMAIN
SECTION
:AM
• RCH is omitted
SFR101
CLK
DI
COUNT
FOK
HCD-GRX2/RX33
— 19 — — 20 — — 21 — — 22 — — 23 —
FM IF REG GND VCC
FM DET
S-CURVE TUNINGDRIVE
LEVELDET
AM/FMIF BUFE
ALC
BUFFER
AMOSC
AMMIX
AMRF AMP
AGC
AM DETAM IF
COMP
FM
AM
MUTE DECORDER
STEREO DRIVE
FF
TRIG
PHASEDET
VCOAM/FMSW
PILOTDET
STEREO SW
3 6 9 122 5 8 111 4 7 10
22 19 16 1323 20 17 1424 21 18 15
OSC/FMSD OSC AFC AM RF SMET AM HPF AF DET MPX VCO MPX IN R OUT L OUT PL DET
FM IF AM MIX REG AM IF GND TU LED ST IND FM DET VCC AM/FM PH DET PH DET
Note on Schematic Diagram:• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolyticsand tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specified.• C : panel designation.• U : B+ Line.• H : adjustment for repair.• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.no mark : FM( ) : REC< > : AM(( )) : PLAY
∗ : Impossible to measure• Waveforms are taken with a oscilloscope.• Circled numbers refer to waveforms.• Signal path.F : FMf : AME : PB (DECK A)a : REC (DECK A)d : PB (DECK B)J : CD
• AbbreviationCND : Canadian AUS : AustralianMX : Mexican SAF : South African
— 57 —
6-4. CASSETTE MECHANISM DECK SECTION
160
161
160
158157
161
154
163
153
154
152
153152
151
SW202
HE901
HRP901
not supplied
not supplied
not supplied
not supplied
not supplied
not suppliednot supplied
notsupplied
not suppliedHP901
SW203
SW204
M901
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
151 9-980-286-01 CAP SCREW 2 × 7.5152 9-980-288-01 A SCREW 2 × 7 (AZIMUTH)153 9-980-287-01 B SCREW 2 × 3154 9-980-276-01 PINCH ROLLER ARM ASSY157 9-980-279-01 SCREW M COLLAR
158 9-980-278-01 MOTOR RUBBER160 9-980-277-01 BELT (W) F161 9-980-281-01 BELT M
* 163 1-759-417-11 DECK, MECHANICALHE901 9-980-284-01 E HEAD (ERASE)HP901 9-980-282-01 P HEAD (PLAY)HRP901 9-980-283-01 RP HEAD (REC/PLAY)M901 9-980-285-01 MOTOR (CAPSTAN/REEL)
HE901 9-980-280-01 E HEAD (ERASE)HP901 9-980-287-01 HEAD (PLAY)HRP901 9-980-279-01 HEAD (REC/PLAY)
M103 X-4948-765-1 MOTOR ASSY (TURN TABLE)M104 X-4948-766-1 MOTOR ASSY (A) (TRAY)M901 9-980-281-01 MOTOR (CAPSTAN/REEL)!PT302 1-431-939-11 TRANSFORMER, POWER (US, CND)!PT302 1-431-961-11 TRANSFORMER, POWER (MX, SAF)
!PT302 1-431-962-11 TRANSFORMER, POWER (AUS)SW202 9-980-270-01 LEAF SWITCH (A DECK)SW203 9-980-270-01 LEAF SWITCH (B DECK)SW204 9-980-271-01 LEAF SWITCH (PLAY)