SERVICE MANUAL Colour Television VIDEO L-AUDIO-R TV/AV F P PT Specifications Power Source . . . . . . . . . AC220-240V, 50/60Hz. Colour System . . . . . . . . PAL (AV input:PAL/NTSC4.43/NTSC/PAL-60Hz) Television System . . . . . . B/G Channel Coverage . . . . .Australia VHF: 0-11, 5A UHF:28-69 CATV: S1-S41, X, Y, Z, Z+1, Z+2 New Zealand VHF: 1-11 UHF:21-69 CATV: S1-S41, X, Y, Z, Z+1, Z+2 Video IF . . . . . . . . . . . . . 38.9MHz Aerial Input Impedance . .75Ω Ext. Terminals Video inputs: Phono jack ✕ 3 (1Vp - p, 75Ω) Audio inputs: Phono jack (R/L) ✕ 3 (436mVrms, more than 40KΩ) Video monitor outputs: Phono jack ✕ 1(1Vp - p, 75Ω) Audio monitor outputs: Phono jack(R/L) ✕ 1 (436mVrms, less than 600Ω) Headphone jack: Mini stereo jack ✕ 1 Sound Output (Music) . . . 7.5W + 7.5W Speakers . . . . . . . . . . . . .6cm ✕ 12cm ✕ 2 pcs. Dimensions . . . . . . . . . . 770(W) ✕ 590(H) ✕ 499(D)mm Weight . . . . . . . . . . . . . . approx. 38.4 Kg Specifications subject to change without notice. Product Code: 1 113 586 18 Original Version Chassis Series: AC2-A C4LY FILE NO. Model No. CP29KX2 Service Ref. No. CP29KX2-00 (Australia) Give complete “SERVICE REF. NO.” for parts order or servicing. It is shown on the rating plate at the cabinet back of the unit. This T.V. receiver will not work properly in foreign countries where the television transmission system and power source dif- fer from the design specifications. Refer to the specification table. 0 7 1 4 8 5 2 3 6 9 ▲ ▼ BASS JXMKL PIC MODE SWAP F -/-- P P Y TV/ A•B CH SCAN TIMER SURROUND P SYSTEM REFERENCE NO. SM5110331
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SERVICE MANUAL Colour Television Model No. …cncms.com.au/SANYO-SMs/Consumer-Electronics/CRT-Television/cp2… · IC Block Diagrams-5-IC201 < IF/Video/Chroma/Def. > QXXAVB488
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Video inputs: Phono jack 3 (1Vp - p, 75Ω)Audio inputs: Phono jack (R/L) 3 (436mVrms, more than 40KΩ)Video monitor outputs: Phono jack 1(1Vp - p, 75Ω)Audio monitor outputs: Phono jack(R/L) 1 (436mVrms, less than 600Ω)Headphone jack: Mini stereo jack 1
Give complete “SERVICE REF. NO.” for partsorder or servicing. It is shown on the rating plateat the cabinet back of the unit.
This T.V. receiver will not work properly inforeign countries where the televisiontransmission system and power source dif-fer from the design specifications. Refer tothe specification table.
1: An isolation transformer should be connected in thepower line between the receiver and the AC linewhen a service is performed on the primary of theconverter transformer of the set.
2: Comply with all caution and safety-related notes pro-vided on the cabinet back, inside the cabinet, on thechassis or the picture tube.
3: When replacing a chassis in the cabinet, always becertain that all the protective devices are installedproperly, such as, control knobs, adjustment coversor shields, barriers, isolation resistor-capacitor net-works etc.. Before returning any television to thecustomer, the service technician must be sure thatit is completely safe to operate without danger ofelectrical shock.
X-RADIATION PRECAUTION
The primary source of X-RADIATION in television receiver is the picture tube. The picture tube is specially con-structed to limit X-RADIATION emissions. For continued X-RADIATION protection, the replacement tube must bethe same type as the original including suffix letter. Excessive high voltage may produce potentially hazardous X- RADIATION. To avoid such hazards, the high voltage must be maintained within specified limit. Refer to this ser-vice manual, high voltage adjustment for specific high voltage limit. If high voltage exceeds specified limits, takenecessary corrective action. Carefully follow the instructions for + B1 volt power supply adjustment, and high volt-age check to maintain the high voltage within the specified limits.
PRODUCT SAFETY NOTICE
Product safety should be considered when a component replacement is made in any area of a receiver.Components indicated by mark in the parts list and the schematic diagram designate components in whichsafety can be of special significance. It is particularly recommended that only parts designated on the parts listin this manual be used for component replacement designated by mark . No deviations from resistancewattage or voltage ratings may be made for replacement items designated by mark .
Chassis Block Diagrams
-3-
V1
L1
R1
V2
L2
R2
FV
3F
L3
FR
3
Vo
Lo
Ro
AV
1
AV
2
Fro
nt
AV
2
AV
Ou
t
IC20
1IF
/Vid
eo/C
hro
ma
TE
LE
TE
XT
BO
AR
D
IC80
1C
PU
Tun
er
IC50
1V
-OU
T
Q43
2H
-OU
TQ
431
H-D
RIV
E
Pcc
Circu
itQ
46
1-Q
46
2
PIC
TU
RE
TU
BE
Q7
21
Q7
01Q
71
1
Vid
eo O
utp
ut
H.V
T4
71
FB
T
DY
C5
15
R5
18
X161
SA
W F
ilter
IC12
00A
V S
W.
IC12
01A
V S
W.
IC35
013D
SU
RR
OU
ND
IC19
20A
UD
IO
CO
NT
RO
LIC
001
AU
DIO
OU
T
6 7 3 52
36
48
34
24
21
12
38
39
20
19
18
27
23
28
30
R G B
BL
K
RG
BB
LK
42
4 7 2
3 13
10
9
23 1 6
101
1
13
1 3913
2 57
10
3
L R
L R
L R
L R
3 S
tere
oA
V1/A
V2
TV
/AV
3D S
urro
und
I2C
Bus
I2C
Bu
s
I2C
Bu
s
Mute
Sp
ea
kers
Headphones
Vid
eo-o
ut
6.5
MH
z5
.5M
Hz
Aeri
al
IF
Band SW
Tu
SIF
-in
Vid
eo-int
Ext
.V
-feedback
V-d
rive
H-d
rive
Vid
eo-o
ut
Syn
c-in
R-o
ut
G-o
ut
B-o
ut
Fro
m: C
PU
AV
SC
ircu
it
Q65
3
Q65
2
IC65
1
Q68
4
Q68
3
5V
12
V
9V
25
V
14
0V
24
V
PO
WE
R S
UP
PLY
CIR
CU
IT
1 2 15
4 11
L/R
L/R
L/RMono
V-o
ut
MAIN SIGNAL PROCESSING CIRCUIT
Following diagrams show the fundamental block diagrams for AC2 chassis and therefore differ slightly from actu-al diagram of each TV set.
This TV set has a built-in power supply protection circuit.It is provided to protect the TV set in case of a power supply circuit malfunctions. When something abnormalityoccurs during TV reception, the TV set goes to the stand-by mode.
When an abnormality occurs during TV reception, it causes pin 24 of the CPU to go continually Low(less than0.75V) for about one second. The CPU detects that this has occurred and outputs the signal from pin 15 toswitch off the power supply lines.
Releasing the protective circuit and restoring power supply
To release the protective circuit and restore power supply, turn the power to the TV set OFF and then ON againvia either the main power switch or the ON-OFF button on the remote control. This will work only if the powersupply trouble was temporary. If there is permanent trouble such as a damaged circuit, power cannot berestored and the circuit will have to be repaired.
Protection Circuit
Service Adjustments Location
-9-
SW601POWERSWITCH
KGL602
PS601
KE
KA
A1901RC PRE-AMP.
D1901 SW1901
SW
1902
Q1902
SW1903 SW1904
C651
Q682
IC651
PROG.+ PROG.- VOL.+ VOL-
Q685Q684
Q686
IC631Q652
Q1901
C804
C656
C652 C654
C653
C685
C644 Q653
C655
F601
TP-EE
R602
L603
Q611
R621
Q612
Q613POWER
SWITCHING
KHC607
Y13 Y12
Q461
Q462
VR
462
C463
C462
C468
R435
C467
T471F.B.T
C471C469
KSC
KQ
C486
L462
C423
C465
C424
C425
C420
C441
C442
L441
L442
Y07
L461
KDY
Q432HORIZ.
OUTPUT
Q527
C527
TP-B
C464
T611CONVERTER
TRANS.
D615
Y14JW17
R645 C645
Q683
C643
C641
C540
JW14
C515
C482
C521
C517
Q431 C514
C434
T431
TP
-AC
K
TP
-ST
S
TP
-SC
L
TP
-SD
T
TP
-GN
D
JW1JW3
JW2KY
JW16
IC501VERT.DEF.
Q540
KCC297
TP-G
TP-V
VR830
Q830
Q831 C830
C835
AU
DIO
IN
PU
T JA
CK
(L)
SW
1905 SW1906
C829
IC801 CPU
Q813
X801 JW28
IC802MEMORY
C828
Q837Q836
Q824
Q360
C351C354
C355
C361C201
C225
KP
JW13
JW12
Q251
X213
X211
C243
C241
L171C206
X361
KCD
KZ
IC202
C122
IC201IF/COLOR DEF.
KSAKSB
Q171
C251
Q190
Q183
Q261
X182
X183KCA
X131Q131 Q135
Q133X133
JW23
KNB KNA
JW21
KZZ
JW24REAR TERMINAL UNIT
KWJW22
A101TUNER TP-A
C102
JW4
JW6
L102
TP-E
C106
KKQ101
Q102Q140
Q137
JW9
C138C172
C177
Q138
X161
JW11
KJ
KLA
KL
C1198
KR
KB
KFC1197
HEADPHONEJACK
K1111
SW
1907
FU
NC
TIO
N
PR
ES
ET
TV
/AV
Selector
VID
EO
IN
PU
T JA
CK
AU
DIO
INP
UT
JA
CK
(R)
JW18
JW27
C809
MAIN BOARD
(F2EA)
NTSC UNIT
SECAM UNIT
TE
LE
TE
XT
UN
IT
SO
UN
D U
NIT
+B POWER SUPPLY CHECKFOCUS ADJ.
SCREEN VR
HORIZONTAL WIDTH ADJ.
Service Adjustments with Replacing Memory IC(IC802)
-10-
Note: The CPU (IC801) and memory IC (IC802) store the service adjustments data and controls data for each circuit.When the Memory IC(IC802) is replaced, some of the service adjustments should be readjusted to obtain thebest performance. The necessary service adjustments are carried out by using the RC handset. Please setup the TV set with following steps [1] to [3].
[1] Initializing Procedure1. Put a new memory IC.2. Turn on the TV set.3. Press and hold the [TV/AV] button on the TV set more than 2 seconds. The following picture appears on the screen.
4. Press the [FUNCTION] button on the TV set while the above On-Screen Display is still on the screen. The followingpicture appears on the screen.
This completes the initialization of memory IC.
Following shows the initialized contents of memory data by this procedure.- Plug & play : No executed- Inhibit data : Cancelled- Ch skip data : Cancelled- Set volume control value to 10/63 steps.- Set all of control values in PERSONAL mode to initial value shown in below table.
Note: When the memory IC replaced, the CPU writes the controls initial value to the replacedmemory IC as shown in below table.
-11-
[2] Required Service AdjustmentsReadjust the following service adjustments.
Adjustments Service Mode No. & ItemHorizontal centre adjustment Item 01, H-PVertical centre adjustment Item 02, V-PVertical size adjustment Item 03, V-SOSD position adjustment Item 04, OSDRF AGC adjustment Item 05, AGCAFT adjustment Item 06, VCOSIF adjustment Item 07, SIFGrey scale adjustment Item 18-24Further adjustment please refer to “Service adjustment-1” on page 13-14.
Following table shows the initial values which have been stored in the CPU ROM, and items for the service adjust-ments.
Notes:+ The initial value that the CPU writes down the CPU ROM data to the memory when replaced the memory IC. TV set
may not operate correctly with this initial value. It is required to set up the fine adjustment for service adjustmentsdescribed in the above.
No. Item Initial value Range Description
01 H-P 8 0~15 Horizontal centre adjustment02 V-P 4 0~7 Vertical centre adjustment03 V-S 80 0~127 Vertical size adjustment04 OSD 1 0~15 OSD position adjustment05 AGC 64 0~127 RF AGC adjustment06 VCO 128 0~255 VCO (AFT) adjustment07 SIF 0 0~3 SIF VCO adjustment08 SELF 0 0~15 SELF-adjusting 09 DLT 2 0~3 DL-time adjustment10 DLF 0 0, 1 DL-fine adjustment11 B-ST 0 0, 1 Black stretch on/off setting12 ABCL 1 0, 1 ABCL adjustment13 AB-G 0 0, 1 ABCL gain adjustment14 TRAP 3 0~3 Trap frequency adjustment15 WBK 0 0, 1 White back setting16 BBK 0 0, 1 Blue back setting17 AFCG 2 0~2 AFC gain adjustment18 RBI 0 0~255 Red bias adjustment19 GBI 0 0~255 Green bias adjustment20 BBI 0 0~255 Blue bias adjustment21 RD 64 0~127 Red drive adjustment22 BD 64 0~127 Blue drive adjustment23 DRV -- -- White balance adjustment24 -- -- -- Y-cut setting
Service mode adjustments table in CPU ROM
Grey scale adjustment
-12-
[Entering to Service Mode]1. Press and hold the [FUNCTION] button on the TV set and press the [1] button on the remote control handset.
Following setting setting items appears on the screen.
2. Select item by pressing the [OFF TIMER] or [MUTE] button on the remote control handset.3. Adjust value by pressing the [VOLUME +] or [VOLUME - ] button on the remote control handset.
To return to normal TV mode, press the [FUNCTION] button on the TV set or on the remote control handset.
[3] Special Function Setting1. Following items should be set up in the special function mode, please refer to “Special Functions” on page 15 for
actual setting up.
- Volume Lock : OFF- Tuning Lock : OFF- AV Start : OFF- Blue Back : OFF- Music Mode : OFF
2. Confirm following system setting by pressing [RECALL] button on the remote control handset.
- Colour system : AUTO- SIF system : S-1
*Note: There may be not available the above function depending on the specification of TV set.
0010010
05 AGC 63
Item No. Item
Read Status
Data value
0010010
23 DRV R 64 B 64
Item No. Item
Read Status
Data value for Red
Data value for Blue
Display for [DRV] White balance adjustment
Display for [AGC] AGC adjustment
Service Mode Adjustments
-13-
(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to normal.(3) Select [H-P] in the service mode.(4) Change value to be optimum horizontal centre position.(5) Exit from the service mode.
(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to normal.(3) Select [V-P] in the service mode.(4) Change value to be optimum vertical centre position.(5) Exit from the service mode.
(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to normal.(3) Select [V-S] in the service mode.(4) Change value to be optimum vertical size.(5) Exit from the service mode.
(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to normal.(3) Select [OSD] in the service mode.(4) Change value to be proper OSD position.(5) Exit from the service mode.
NOTE: Do not attempt this adjustment with weak signal.(1) Tune the receiver to most clearest (or strongest) VHF
station in your area. Set the brightness and contrastcontrols to maximum. Set the colour control to mini-mum.
(2) Select [AGC] in the service mode.(3) Change value until the snow noise just disappears.(4) Exit from the service mode.
(1) Input the SG signal to collector of Q101.SG signal frequency : 38.9MHzSG signal level : 70 dB
(2) connect a short clip between the base of Q101 andground.
(3) Connect oscilloscope to pin 2 of IC201.(4) Select [VCO] in the service mode.(5) Change value until the voltage to be 4.5 ± 1.0V.(6) Exit from the service mode.
(1) Tune the receiver to the clearest station with SystemB/G(5.5MHz) in your area.
(2) Connect DC voltmeter to pin 46 of IC201 and ground.(2) Select [SIF] in the service mode.(3) Change value until the voltage to be about 3.0 V.(4) Exit from the service mode.
Item 07 [SIF] SIF
Item 06 [VCO] AFT
Item 05 [AGC] AGC
Item 04 [OSD] OSD POSITION
Item 03 [V-S] VERTICAL SIZE
Item 02 [V-P] VERTICAL CENTRE
Item 01 [H-P] HORIZONTAL CENTRE
Horizontal centre
Vertical centre
Vertical size
ADJUSTMENT-1Following adjustments should be carried out when the memory IC is replaced. How to enter the service mode andadjust values, please refer to “ Entering to Service mode” on page 12.
(1) Receive the monochrome circular pattern.(2) Set the brightness and colour to normal, contrast to
maximum.(3) Enter to the service mode.(4) Set each value of [RBI], [GBI], [BBI] mode to 0. Set each
value of [RD], [BD] mode to 64.(5) Select next of [DRV] mode to be one horizontal scan-
ning line and turn the screen volume on the FBT toobtain just visible one coloured line.
(6) Press the [1], [2], [5], [6], [9] or [0] button to adjust thebrightness of each colour until a dim white line pro-duced. Please see the control button allocations in thismode.
(7) Select [DRV] mode to enter the white balance adjustingmode.
(8) Press the [3], [4], [-/--] or [RECALL] button alternate-ly to produce normal black and white picture.
(9) Exit from the service mode.(10) Check for proper grey scale tracking at all brightness
levels.NOTE: If the grey scale adjustment is made after picture
tube replacement, check the high voltage.
Items 18-24 GREY SCALE
0
7
1
4
8
5
2 3
6
9
BASS
JXMKL
PIC MODE
SWAP
F
-/--
P P Y
TV/
A•B
CH SCAN
TIMER
SURROUND
P
SYSTEM
-14-
(1) Connect DC meter to TP-B and the ground.(2) Set the brightness and contrast to normal.
Tune the receiver to an active channel and synchro-nized picture.
(3) The B-voltage must be 140 ± 1 volt DC.
(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to maximum.(3) Connect a high voltage probe to anode lead of the pic-
ture tube.(4) The high voltage must be 29KV ± 1KV and less than
32KV at 0 beam current.
NOTE:If the picture tube is replaced, check the high voltage.The horiz. width adjustment affects the high voltage.Therefore, re-check the high voltage.
(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to normal.(3) Adjust VR462 for optimum horizontal width.
HORIZONTAL WIDTH
HIGH VOLTAGE CHECK
B-VOLTAGE SUPPLY CHECK
ADJUSTMENT-2Following adjustments are not required to readjust when replacing the memory IC.
Red Bias -
Red Bias +
Green Bias - Green Bias +
Blue Bias -
Blue Bias +
Press [F] buttonto exit fromservice mode
Red Drive -
Red Drive +
Blue Drive -
Blue Drive +
-15-
Purity and Convergence Adjustment
RED
BLUE
Adjust tabs together tosuperimpose red andblue horizontal line.
Figure- 2 BLUE AND RED LINE MOVEMENT Figure- 3 BLUE/RED AND GREEN MOVEMENT
Adjust tabs together tosuperimpose red/blueand green horizontalline.
Adjust tabs angle to superimposeblue and red vertical line.
Adjust tabs angle to superimposered/blue and green vertical line.
GREEN
BLUE / RED
CAUTION: The Convergence and Purity adjustments have been made at the factory. Readjustmentshould be made only after picture tube or deflection yoke replacement, following the steps below:
PURITY ADJUSTMENT1. Demagnetize the picture tube and receiver using an external
degaussing coil. When replacing picture tube or deflectionyoke, mount deflection yoke and purity-convergence magnetsassembly properly, see figures 1 and 4.
2. Turn Red and Blue guns off and provide only Green raster.Rotate Screen control to fully counterclockwise. Rotate Redand Blue Bias controls fully counterclockwise. Slowly rotateGreen Bias control clockwise to produce Green raster.
3. Loosen the screw holding the Deflection Yoke and remove the3 Rubber Wedges, and slide the Deflection Yoke fully forward.
4. Rotate and spread the Tabs of the two Purity Magnets to cen-tre the vertical green belt in the picture screen. The PurityMagnets are also adjusted to obtain vertical centring of theraster.
5. Slowly slide the Deflection Yoke backward until a uniformgreen screen is obtained.
6. Check the purity of the red and blue screens for uniformity,turn off other colours to check this (use bias controls).Readjust the yoke position if necessary until all screens arepure.
7. Adjust each Bias control and screen control to obtain whiteraster. Refer to Gray Scale Adjustment. If part of the picturescreen is coloured, adjust the Deflection Yoke position forwardor backward slightly.
8. Tighten the mounting screw of the Deflection Yoke. AdjustConvergence next.
CENTRE CONVERGENCE ADJUSTMENT1. Use a dot crosshatch pattern signal.2. Turn Red and Blue guns on and turn off Green gun. Adjust the
angle between the Tabs of the Four Pole Magnet 1 and 2, andsuperimpose the Red and Blue vertical lines in the centre areaof the picture screen. Refer to figure 2.
3. Keeping the mutual angle of the Tabs of the Four Pole Magnetturn them together to superimpose the Blue and Red horizon-tal lines in the centre area of the picture screen. Refer to fig-ure 2.
4. Turn Green gun on and adjust Six Pole Magnet 3 and 4 thatthe Green line superimposed on the Red/Blue lines.This is the same procedure used in steps 2 and 3.Refer to figure 3.
OUTER AREA CONVERGENCE ADJUSTMENTSlightly loosen the screw holding the Deflection Yoke. Adjust theDeflection Yoke to converge the detail in the outer area (left sideand right side) of the picture screen by orbital movement of thefront of the Yoke, then secure the Deflection Yoke in appropriateposition by putting the wedges as illustrated. Tighten screw hold-ing the Deflection Yoke.
RUBBERWEDGE
DEFLECTION YOKE
DEFLECTION YOKEMOUNTING SCREW
Figure 4. Deflection Yoke Movement
SIX-POLEMAGNET TABS FOUR-POLE
MAGNET TABS
ANGLEOF TABS
PURITYMAGNETTABS
43
21
FOCUS GAP(G3-G4)
Figure 1. Purity and Convergence Magnets
MAGNET TABS
ANGLE OF MAGNET TABS
Figure 5. Adjusting Magnet
-16-
C4LYCabinet Parts List
Key No. Part No. Description
Note: Parts order must contain Service Ref. No., Part No., and descriptions.
Ref. No. Part No. Description Ref. No. Part No. Description
Product safety should be considered when a component replacement is made in any area of a receiver. Components indicated by a mark in this parts list and the circuit diagram show components whose value havespecial significance to product safety. It is particularly recommended that only parts specified on the following partslist be used for components replacement pointed out by the mark.
!
Note: Parts order must contain Service Ref. No., Part No., and descriptions. The main PCB unit will be supplied without tuner andflyback transformer. They should be ordered separately.
Read description in the Capacitor and Resistor as follows:
CAPACITORCERAMIC 100P K 50V
Rated Voltage
Tolerance Symbols:Less than 10pFA : Not specified B : ±0.1pF C : ±0.25pFD : ±0.5pF F : ±1PF G : ±2pFR : ±0.25-0pF S : ±0-0.25pF E : +0-1pFMore than 10pFA : Not specified B : ±0.1% C : ±0.25%D : ±0.5% F : ±1% G : ±2%H : ±3% J : ±5% K : ±10%L : ±15% M : ±20% N : ±30%P : +100-0% Q : +30-10% T : +50-10%U : +75-10% V : +20-10% W : +100-10%X : +40-20% Y : +150-10% Z : +80-20%
Material:CARBON........... CarbonMT-FILM............ Metal FilmOXIDE-MT......... Oxide Metal FilmSOLID................ CompositionMT-GLAZE......... Metal GlazeWIRE WOUND...Wire WoundCERAMIC RES.. CeramicFUSIBLE RES....Fusible