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Sanyo C21LF37 Service Manual
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Sanyo C21LF37 Service Manual

Sanyo C21LF37 Service Manual

Colour television
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SERVICE MANUAL Colour Television
Specifications
Power Source . . . . . . . . .AC220V, 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 input: Phono jack
Audio input: Phono jack (R/L)
Video monitor output: Phono jack
Audio monitor output: Phono jack (L/R)
Headphone Jack: Mini stereo jack
Sound Output (RMS) . . . . 3W + 3W
Speakers . . . . . . . . . . . . 5cm x 9cm x 2 pcs.
Dimensions
. . . . . . . . . . 597(W)
Weight . . . . . . . . . . . . . . approx. 21.8 Kg
Specifications subject to change without notice.
C7SE
2 (1Vp - p, 75Ω)
2 (436mVrms, more than 40KΩ)
1(1Vp - p, 75Ω)
1(436mVrms, less than 600Ω)
1
484(H)
481(D)mm
POW ER
Product Code: 111376404
Original Version
Chassis Series: LA5-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.
FILE NO.
Model No. C21LF37
(Argentina)
Service Ref. No. C21LF37-00

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Summary of Contents for Sanyo C21LF37

  • Page 1 FILE NO. SERVICE MANUAL Colour Television Model No. C21LF37 (Argentina) Service Ref. No. C21LF37-00 POW ER Specifications Product Code: 111376404 Power Source ..AC220V, 50Hz / 60Hz Receiving System ..PAL (M/M, N/N), NTSC (M/M)

  • 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 Diagrams SYSTEM CONTROL...

  • Page 5: Ic Block Diagrams

    IC Block Diagrams IC201 < IF/Video/Chroma/Def. > LA76818A Audio Output SIF Input FM Output/Selected SIF APC Filter Audio Output SIF Output PIF AGC Ext. Audio Input RF AGC Output PIF Input1 APC Filter VCO Coil 1 PIF Input 2 VCO Coil 2 IF Ground VCO Filter IF Vcc...
  • Page 6 IC Block Diagrams IC201 <IF System Block Diagram> LA76818A...
  • Page 7 IC Block Diagrams IC1201 <VIDEO SW > IC501 < Vertical Output > IC002 < Audio AMP. > LA42052-E LA7016 LA78040N-E, TDA9302H STANDBY OUTPUT Thermal Protection INPUT AMP. OUTPUT AMP. INPUT 2 N.C. INPUT 1 N.C. OUT1 Pump CONTROL INPUT REF AMP. THERMAL POWER PROTECTION...

  • Page 8: Service Adjustments

    Service Adjustments General This set has an On-screen Service Menu system included in the CPU that allows remote operation for most of the service adjustments. IC802 (EEPROM) Replacement When IC802 (EEPROM) is replaced, IC801 (CPU) will automatically write the initial reference data into IC802 for basic TV operation. However, the bus data should be checked and some bus data should be set up before attempting the service adjustments.
  • Page 9 Service Adjustments On-screen Service Menu Following table shows the initial values which have been stored in the CPU ROM, and items for the service adjustments. When IC802 (EEPROM) is replaced, check the bus data to confirm they are the same as below. The shaded menu should be checked and be set up or readjusted according to the procedures described in the following pages.
  • Page 10 Service Adjustments Item Initial value Range Description COOP 00~07 Colour Killer Y-APF 00, 01 Y-APF Select DEEM 00, 01 De-emphasis TC V-LVL 00~07 Video Level FMLVL 00~31 FM Level TTEST 00~07 Trap Test IFOM-S 00, 01 Over Mod. SW IFMN-S 00, 01 Audio Monitor SW, Monitor/FM IFTRPS...
  • Page 11 Service Adjustments Important Notice: Do not attempt to adjust service adjustments not listed on below otherwise it may cause loss of performance and for correct operation. Item 01 [RFAGC] AGC Item 04 [V-SIZ] VERTICAL SIZE NOTE: Do not attempt this adjustment with weak signal. 1.
  • Page 12 Service Adjustments Items 16-23 GREY SCALE (1) Receive a 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-16 RBIAS, 17 GBIAS, 18 BBIAS mode to 00. Set each value of Item-19 RDRIV, 21 BDRIV mode to 63, 20 GDRIV to 07.
  • Page 13 Service Adjustments Service Adjustment-2 (MTS Adjustment) 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 HIGH SEPARATION 00~63 LOW SEPARATION 00~63 1. Enter the Service Menu While pressing the MENU button on the televi- sion, press the Number Key 3 on the remote control unit.
  • Page 14 Service Adjustments SOUND LEVEL ADJUSTMENT 1. Connect a signal to the antenna terminal with audio signal TP-317(pin-38 of IC3401) of 1KHz at 100% modulated. 2. Connect a DC Volt-Meter to TP-317 ( pin-38 of IC3401) and the ground. 3. Switch the TV set on, and set the Surround OFF. Press and hold the MENU button on the TV set, and JP3405 press “3”...

  • Page 15: Service Adjustment

    Service Adjustments 6. Select “HI SEPARATION” by pressing the Cursor or CHANNEL UP/DOWN button on the remote control or TV set. INPUT LEVEL HI SEPARATION LOW SEPARATION ADJUST: - /+ CHOOSE: EXIT : MENU Minimum leakage TP-318 (L) 7. Adjust the level of 4KHz at TP-318 (pin-39 of IC3401) to become minimum level by pressing the Cursor + / - or VOLUME + / - button on the remote control or TV set.

  • Page 16: Protection Circuit

    Service Adjustments Service Adjustment-4 HORIZ. WIDTH AND HIGH VOLTAGE CHECK FOCUS ADJUSTMENT Horizontal Width Adjustment 1. Receive a monochrome circular pattern. 1. Receive the monochrome circular pattern. 2. Set the brightness and contrast to maximum. 2. Set the brightness to normal and contrast to maximum. 3.

  • Page 17: 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. Adjust 1.

  • Page 18: Cabinet Parts List

    LATCH PUSH,7.9X6.9BK 655 000 6936 LATCH PUSH,7.9X6.9BK 610 319 9597 DEC SHEET-C7SE 610 319 2673 CABINET FRONT-C7SE 645 040 1107 BADGE,SANYO*53.5X12L53.5 610 319 2741 CABINET BACK-C7SA 610 318 1424 LABEL RATING-C7SE 645 072 9782 ASSY,REMOCON JXMTF 610 297 9879 RC-BATTERY LID-JXMTA...

  • Page 19: Chassis Electrical Parts List

    Chassis Electrical Parts List C7SE 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 20 C7SE Ref. No. Part No. Description Ref. No. Part No. Description 405 014 4618 TR 2SC2412K T146 S 405 163 1612 TR 2SC2812N-L6-TB0 405 015 8724 TR 2SC2812-L6-TB 405 163 1711 TR 2SC2812N-L7-TB0 405 015 8922 TR 2SC2812-L7-TB 405 173 9813 TR 2SC3928A1R 405 163 1612 TR 2SC2812N-L6-TB0...
  • Page 21 C7SE Ref. No. Part No. Description Ref. No. Part No. Description INTEGRATED CIRCUIT 404 084 8707 ELECT 0.47U M IC002 409 569 1907 IC LA42052-E C138 403 284 4324 CERAMIC 0.022U K C171 403 155 2131 CERAMIC 1500P K IC1201 409 018 7603 IC LA7016 IC201...
  • Page 22 C7SE Ref. No. Part No. Description Ref. No. Part No. Description C3439 404 089 6401 NP-ELECT 4.7U M C652 403 052 8523 ELECT 1000U M C358 403 049 0018 ELECT 1U M 404 088 6709 ELECT 1000U M 404 084 8806 ELECT 1U M C654...
  • Page 23 C7SE Ref. No. Part No. Description Ref. No. Part No. Description R1014 401 105 0732 MT-GLAZE 100K JA 1/16W R3402 401 105 2726 MT-GLAZE 220 JA 1/16W R1015 401 105 5925 MT-GLAZE 560 JA 1/16W R3406 401 105 0732 MT-GLAZE 100K JA 1/16W R1021 401 105 0534...
  • Page 24 C7SE Ref. No. Part No. Description Ref. No. Part No. Description R641 401 024 7430 CARBON 10K JA 1/6W R881 401 105 4136 MT-GLAZE 3.3K JA 1/16W R642 401 027 0329 CARBON 47K JA 1/6W R882 401 105 4136 MT-GLAZE 3.3K JA 1/16W R643 401 025 4626...
  • Page 25 C7SE Ref. No. Part No. Description Ref. No. Part No. Description D467 407 013 4326 DIODE 1S2076A-TD 407 012 4416 DIODE 1SS133 T-77 408 009 3204 DIODE 1N4148 TP 408 009 3204 DIODE 1N4148 TP D468 407 013 4326 DIODE 1S2076A-TD D694 407 149 0817 DIODE 1SS355-TE-17...
  • Page 26 C7SE Ref. No. Part No. Description Ref. No. Part No. Description COIL 406 000 3605 TR 2SC3620(LB-SAN-1) Q711 405 041 6507 TR 2SC2621-D-RA L701 645 007 9863 INDUCTOR,220U K 405 041 6705 TR 2SC2621-E-RA DIODE TR 2SC2688(1)-K TR 2SC2688(1)-L D741 407 012 4416 DIODE 1SS133 T-77 TR 2SC2688(1)-M...
  • Page 27 -27-...
  • Page 28 Nov./’04 NEWSAN S. A. Una empresa del grupo SANYO Electric Co.
  • Page 29 =12K SERVICE Rated wattage (1/2W) W: Wire wounding may be some components or partial circuit differences between the C21LF37-00 C: Solid actual chassis and the circuit diagram. REF. NO. 9. Parts specified with "X" are not installed in this model.
  • Page 30 Waveforms & Voltages CRT BOARD (Component Location) (On the Main Board) 1AA4B10E6900B IC002 (AUDIO AMP.) Pin-1 8.9V 1.6V 1.6V 5.8V 11.7V 17.7V 9.0V N.C. Q701 R741 B-OUT D741 10 GND N.C. 9.0V N.C. D742 J702 Q701-L D754 IC1201 (VIDEO SW) Q711 L700 Q721...

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