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Sanyo C21LB25S Service Manual

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SERVICE MANUAL Colour Television
VIDEO L-AUD IO-R
Specifications
Power Source . . . . . . . . .AC110V-240V, 50Hz / 60Hz
Receiving System . . . . . .PAL (M/M, N/N), NTSC (M/M)
Channel Coverage
Antenna mode VHF: CH02-CH13, UHF: CH14-CH69
CATV mode
VHF band: CH01-CH13, Mid band: CH14-CH22
Super band: CH23-CH36, Hyper band: CH37-CH64
Ultra band: CH65-CH94 and CH100-CH125
Low mid band: CH95-CH99
Video IF . . . . . . . . . . . . .45.75MHz
Aerial Input Impedance . .75Ω
Ext. Terminals
Video inputs: Phono jack
Audio inputs: Phono jack (R/L)
Headphone Jack: Mini stereo jack
Sound Output (RMS) . . . .3W + 3W
Speakers . . . . . . . . . . .5cm x 9cm x 2
Dimensions . . . . . . . . .C21LB25S: 606(W)
C29LK35: 656(W)
Weight . . . . . . . . . . . . .C21LB25S: approx. 21.0 Kg
C29LK35: approx. 32.0 Kg
Specifications subject to change without notice.
C4BE/C4BES/C4CE
MENU
CH
-
+
VOLUME
2 (1Vp - p, 75Ω)
2 (436mVrms, more than 40KΩ)
1
479(H)
483(D)mm
600(H)
496(D)mm
FILE NO.
Model No. C21LB25S
Service Ref. No. C21LB25S-00
VIDEO L-AUD
IO-R
MENU
CH
-
VOLUME
+
Product Code: 1 113 549 04 (C21LB25S)
1 113 550 04 (C29LK35)
Original Version
Chassis Series: LA4-A
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 trans-
mission system and power source differ from
the design specifications. Refer to the specifi-
cation table.
REFERENCE NO.
C29LK35
(Argentina)
C21LB25S-01
C29LK35-00
VIDEO
POWER
AUDIO
MODE
MODE
1
2
3
4
5
6
7
8
9
RECALL
SLEEP
0
MENU
IMAGE
+
-
VOL
VOL
CH
MUTE
DISPLAY
FXMR
SM
5110159

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Table of Contents

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   Summary of Contents for Sanyo C21LB25S

  • Page 1 C29LK35: 656(W) 600(H) 496(D)mm mission system and power source differ from Weight ... . .C21LB25S: approx. 21.0 Kg the design specifications. Refer to the specifi- C29LK35: approx. 32.0 Kg cation table.
  • Page 2: Table Of Contents

    Contents Safety Notice ............... . 2 Chassis Block Diagram .
  • Page 3: Chassis Block Diagram

    Chassis Block Diagrams MAIN SIGNAL PROCESSING CIRCUIT...
  • Page 4: Chassis Block Diagram

    Chassis Block Diagrams SYSTEM CONTROL...
  • Page 5: Ic Block Diagrams

    IC Block Diagrams IC201 < IF/Video/Chroma/Def. > QXXAVB488 AUDIO EXIT AUDIO H OUTPUT AUDIO DIRECT AF DC H-OSC BLACK PEAK B-Y IN R-Y IN SIF IN DEFLECTION HI VCC X TAL 3.58 X TAL 4.43 IF OUT VIDEO VIDEO COLOUR APC IDENT FILTER IF APC KILLER FILTER...
  • Page 6 IC Block Diagrams IC001 < Audio AMP. > LA4600 Standby Standby SW Ch1 input Pre- Output Input drive Ch1 output amplifier amplifier amplifier Large signal Small signal TSD protector amplifier Pre- Output drive Input Ch2 output amplifier amplifier amplifier Ch2 Input Ripple filter Pop noise prevention block Filter...
  • Page 7: Ic Block Diagrams

    IC Block Diagrams IC3401 < MTS Decoder, Audio Control & Switch> UPC1851BCU Power Supply Analog Ground Volume Control Block L-channel Offset Absorption 2.2µF R-channel Offset Absorption 0.022µF L-channel Capacity of R-channel Capacity of High Frequency Tone Control Block High Frequency Band Width Band Width R-channel Capacity of Low Frequency...
  • Page 8: Service Adjustments With Replacing Memory Ic(ic802)

    Service Adjustments with Replacing Memory IC(IC802) 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 the best performance.
  • Page 9 Service Adjustments with Replacing Memory IC(IC802) [2] Service Adjustments-1 Following table shows the initial values which have been stored in the CPU ROM, and items for the service adjustments. Service mode adjustments table in CPU ROM Item Initial value Range Description 00~15 Horizontal centre adjustment...
  • Page 10 Service Adjustments with Replacing Memory IC(IC802) [Entering to Service Mode] Press and hold the MENU button on the TV set and press the 2 button on the remote control handset. Following setting items appears on the screen. ME NU Display for [H-P] Horizontal centre adjustment Read Status of Read Status STEREO IC...
  • Page 11 Service Adjustments with Replacing Memory IC(IC802) Item 01 [H-P] HORIZONTAL CENTRE Item 05 [AGC] AGC NOTE: Do not attempt this adjustment with weak signal. (1) Receive the monochrome circular pattern. (1) Tune the receiver to most clearest (or strongest) VHF (2) Set the brightness and contrast to normal.
  • Page 12 Service Adjustments with Replacing Memory IC(IC802) Items 18-24 GREY SCALE (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 Item-18 RBI, 19 GBI, 20 BBI mode to 00. Set each value of Item-21 RD, 22 BD mode to 64. (5) Select Item-24 mode to be one horizontal scanning line and turn the screen volume on the FBT to obtain just visible one coloured line.
  • Page 13 Service Adjustments with Replacing Memory IC(IC802) [3] Service Adjustments-2 Following table shows the initial values of MTS Adjustment which have been stored in the CPU ROM. Item Initial value Range INPUT LEVEL 00~63 STEREO VCO 00~63 FILTER 00~63 LOW SEPARATION 00~63 HIGH SEPARATION 00~63...
  • Page 14: Input Level

    Service Adjustments with Replacing Memory IC(IC802) SOUND LEVEL ADJUSTMENT TP-317 MAIN BOARD 1. Connect a signal generator to TP-301(- side of C3407) on the Main Board and the ground. Signal output=300Hz, 150mVrms. 2. Connect a DC Volt-Meter to TP-317( + side of C3437) and the ground.
  • Page 15: Filter

    Service Adjustments with Replacing Memory IC(IC802) TP-317 MTS FILTER ADJUSTMENT MAIN BOARD 1. Connect a signal generator to TP-301(- side of C3407) and the ground. Signal output=15.734KHz, 100mVrms. 2. Connect a DC Volt-Meter to TP-317( + side of C3437) and the ground.
  • Page 16: Sap Vco

    Service Adjustments with Replacing Memory IC(IC802) TP-317(R) 5. Adjust level of 300Hz at TP-317 (+ side of C3437) to Minimum leakage become minimum level by pressing the VOLUME(+/ -) button on the remote control or TV set. 300Hz 6. Select “HI SEPARATION” by pressing the CHANNEL UP/DOWN button on the remote control or TV set.
  • Page 17: Menu

    Service Adjustments with Replacing Memory IC(IC802) [4] Service Adjustment-3 FINE TUNING This adjustment is used to do a fine tuning of the channels with poor reception after they have been stored by the auto- matic tuning. This function is available for one channel only and the fine-tuned channel is memorized into IC802 (EEPROM). Press and hold the MENU button on the TV set and press the 4 or MENU button on the remote control handset to enter to the service mode.
  • Page 18: Service Adjustments

    Service Adjustments Following adjustments are not required to readjust when replacing the memory IC. MAIN BOARD F.B.T. T401 Q432 HORIZ. OUT FOCUS VR (Upper side) FOCUS ADJUSTMENT (1) Receive the monochrome circular pattern. (2) Set the brightness to normal and contrast to maximum. (3) Adjust the focus control on the F.B.T.
  • Page 19: Purity And Convergence Adjustment

    Purity and Convergence Adjustment CAUTION: The Convergence and Purity adjustments have been made at the factory. Readjustment should be made only after picture tube or deflection yoke replacement, following the steps below: PURITY ADJUSTMENT 8. Tighten the mounting screw of the Deflection Yoke. 1.
  • Page 20: Cabinet Parts List

    610 288 9192 CABINET FRONT 645 040 1107 BADGE,SANYO 610 273 5185 CABINET BACK 610 288 9505 LABEL RATING (Service Ref. No. C21LB25S-00) 610 288 9833 LABEL RATING (Service Ref. No. C21LB25S-01) 645 029 2590 ASSY,REMOCON FXMR 610 273 0173 RC-BATTERY LID...
  • Page 21: Cabinet Parts List

    COIL SPRING 610 288 9260 DEC IND 610 288 9178 BUTTON UNITED 610 288 9215 CABINET FRONT 645 040 1107 BADGE,SANYO 610 270 3153 CABINET BACK 610 288 9512 LABEL RATING 645 029 2590 ASSY,REMOCON FXMR 610 273 0173 RC-BATTERY LID...
  • Page 22: Chassis Electrical Parts List

    Chassis Electrical Parts List C4BE Service Ref. No. C21LB25S-00 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 have special significance to product safety.
  • Page 23 C4BE Ref. No. Part No. Description Ref. No. Part No. Description 405 002 0308 TR 2SA1037K T146 R IC611 410 326 4901 IC STR-F6654 LF1351 405 002 0407 TR 2SA1037K T146 S IC631 409 172 8102 IC SE130NH 405 002 6706 TR 2SA1179-M6-TB IC651 409 241 5407...
  • Page 24 C4BE Ref. No. Part No. Description Ref. No. Part No. Description C3413 403 049 0008 ELECT 1U M 403 232 1409 CERAMIC 220P K C3414 403 090 3607 TA-SOLID 10U K C614 403 138 9905 POLYESTER 470P J C3416 403 049 0008 ELECT 1U M 403 276 9102...
  • Page 25 C4BE Ref. No. Part No. Description Ref. No. Part No. Description R108 401 026 1307 CARBON 27K JA 1/6W R3422 401 024 6700 CARBON 100 JA 1/6W R109 401 162 3005 MT-GLAZE 22K JA 1/10W R3440 401 256 3805 MT-GLAZE 1.5K JA 1/10W R1101 401 007 7601...
  • Page 26: Filter

    C4BE Ref. No. Part No. Description Ref. No. Part No. Description R684 401 150 5905 MT-GLAZE 10K JA 1/10W D009 407 099 5808 ZENER DIODE MTZJ7.5A R685 401 012 5708 CARBON 1K JA 1/4W 407 057 6304 ZENER DIODE RD7.5EB1 R686 401 012 7009 CARBON...
  • Page 27 C4BE Ref. No. Part No. Description Ref. No. Part No. Description D613 407 006 0100 DIODE ERA91-02 405 066 9903 TR 2SC2688(1)-K D614 407 099 7000 ZENER DIODE MTZJ15B 405 067 0008 TR 2SC2688(1)-L 407 054 5805 ZENER DIODE RD15EB2 405 067 0107 TR 2SC2688(1)-M D615...
  • Page 28: Chassis Electrical Parts List

    C4BES Chassis Electrical Parts List Service Ref. No. C21LB25S-01 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 have special significance to product safety.
  • Page 29 Chassis Electrical Parts List C4CE Service Ref. No. C29LK35-00 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 have special significance to product safety.
  • Page 30 C4CE Ref. No. Part No. Description Ref. No. Part No. Description 405 002 0308 TR 2SA1037K T146 R INTEGRATED CIRCUIT 405 002 0407 TR 2SA1037K T146 S IC001 409 389 4607 IC LA4600 405 002 6706 TR 2SA1179-M6-TB IC191 409 241 5407 IC BA178M05T 405 002 6904 TR 2SA1179-M7-TB...
  • Page 31 C4CE Ref. No. Part No. Description Ref. No. Part No. Description C3404 403 050 6600 ELECT 3.3U M C608 404 073 5106 CERAMIC 470P K 250V C3406 403 166 1605 NP-ELECT 4.7U M 404 073 3300 CERAMIC 470P M 250V C3407 403 049 9803 ELECT...
  • Page 32 C4CE Ref. No. Part No. Description Ref. No. Part No. Description R003 401 256 0408 MT-GLAZE 12K JA 1/10W R261 401 162 3104 MT-GLAZE 3.3K JA 1/10W R004 401 256 0309 MT-GLAZE 820 JA 1/10W R262 401 025 7409 CARBON 220 JA 1/6W R006...
  • Page 33 C4CE Ref. No. Part No. Description Ref. No. Part No. Description R608 402 000 8305 SOLID 5.6M KA 1/2W T611 652 000 1053 TRANS,POWER,PULSE R609 402 000 8305 SOLID 5.6M KA 1/2W R611 401 069 4501 OXIDE-MT 68K JA COIL R612 401 007 2903 CARBON...
  • Page 34 C4CE Ref. No. Part No. Description Ref. No. Part No. Description D491 407 124 6404 DIODE ERA18-04 645 006 4708 JACK,PHONE D3.6 407 007 6606 DIODE ES1 K1111 645 002 0568 TERMINAL,BOARD 407 124 5506 DIODE RMPG06G PS602 408 013 3801 TH PTH451C262BF140M270 D501 407 005 7308...
  • Page 35 C4CE Ref. No. Part No. Description Ref. No. Part No. Description RESISTOR R701 401 152 3206 MT-GLAZE 330 JA 1/10W R703 401 162 3609 MT-GLAZE 470 JA 1/10W R704 401 065 4604 OXIDE-MT 12K JA R705 401 009 1508 CARBON 2.7K JA 1/2W R711...
  • Page 36 A14800 /Nov. /’00 /150 SI NEWSAN S. A. Una empresa del grupo SANYO Electric Co. Printed in Japan...

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C29lk35

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