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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 . . 75
Ext. Terminals
Video inputs: Phono jack
Audio inputs: Phono jack
Speaker . . . . . . . . . . . . . 5cm
Sound Output (Music) . . . 2.0W
Dimensions . . . . . . . . . 496(W)
Weight . . . . . . . . . . . . . approx. 16.7Kg
Specifications subject to change without notice.
F5TT
VIDEO
AUDIO
MENU
CH
2(1Vp - p, 75
2 (436mVrms, more than 40K
9cm
2
464(H)
472(D)mm
-
+
VOL
Product Code: 1 113 378 15
Original Version
Chassis Series: LC1-B
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. C20LB87B
(Argentina)
Service Ref. No. C20LB87B-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
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Table of Contents
Related Manuals for Sanyo C20LB87B
Summary of Contents for Sanyo C20LB87B
- Page 1 FILE NO. SERVICE MANUAL Colour Television Model No. C20LB87B (Argentina) Service Ref. No. C20LB87B-00 VIDEO POWER AUDIO MODE MODE RECALL SLEEP MENU IMAGE MUTE DISPLAY VIDEO AUDIO MENU FXMR Specifications Product Code: 1 113 378 15 Power Source ..AC220V, 50Hz / 60Hz Receiving System .
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Page 2: Table Of Contents
Contents Safety Notice ............... . 2 Chassis Block Diagram . -
Page 3: Chassis Block Diagram
Chassis Block Diagrams MAIN SIGNAL PROCESSING CIRCUIT HORIZ. AUDIO-IN EXT. VERT. VIDEO-IN EXT. VIDEO-IN INT. VIF/SIF AUDIO-OUT... - Page 4 Chassis Block Diagrams SYSTEM CONTROL...
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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: Protection Circuit
IC Block Diagrams IC001 < Audio AMP. > LA4285 1000 F DC VOL POWER OUT INT/EXT 0.1 F 100 F PRE GND 10 F 47 F DC VOL D. C POWER GND IC501 < Vertical Output > LA7840 THERMAL PUMP PROTECTION LA7840 LA7841... -
Page 7: 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 8 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 9 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. MENU Display for [H-P] Horizontal centre adjustment Read Status 00100100 Item No.
- Page 10 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 11 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 12 Service Adjustments with Replacing Memory IC(IC802) [3] Service Adjustment-2 FINE TUNING This adjustment is used to do a fine tuning of the channels with poor reception after they have been stored by the automatic tuning.This function is available for one channel only and the fine-tuned channel is memorized into IC802 (EEPROM).
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Page 13: Service Adjustments
Service Adjustments Following adjustments are not required to readjust when replacing the memory IC. MAIN BOARD FOCUS ADJUSTMENT +B POWER SUPPLY 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. for the best focus on the screen centre. -
Page 14: 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 15: Cabinet Parts List
SPRING 610 269 9166 DEC IND 610 269 8930 BUTTON UNITED 610 270 7229 CABINET FRONT 645 040 1107 BADGE,SANYO 610 269 6585 CABINET BACK 610 297 1699 LABEL RATING 645 029 2590 ASSY,REMOCON FXMR 610 273 0173 RC-BATTERY LID... -
Page 16: Chassis Electrical Parts List
F5TT Chassis Electrical Parts List 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 17 F5TT Ref. No. Part No. Description Ref. No. Part No. Description 405 163 1602 TR 2SC2812N-L6-TB0 Q861 405 134 5905 TR 2SA1037AK-T146-R 405 163 1701 TR 2SC2812N-L7-TB0 405 147 2205 TR 2SA1037AK-S-T146 Q261 405 134 5905 TR 2SA1037AK-T146-R 405 002 0308 TR 2SA1037K T146 R 405 147 2205 TR 2SA1037AK-S-T146...
- Page 18 F5TT Ref. No. Part No. Description Ref. No. Part No. Description C152 403 157 2901 CERAMIC 47P J 404 071 4507 CERAMIC 470P K 400V C171 403 048 1907 ELECT 0.22U M C613 403 056 8103 POLYESTER 1000P K C172 403 049 0008 ELECT 1U M...
- Page 19 F5TT Ref. No. Part No. Description Ref. No. Part No. Description R142 401 162 2909 MT-GLAZE 220 JA 1/10W R453 401 024 7004 CARBON 1K JA 1/6W R144 401 256 7506 MT-GLAZE 390 JA 1/10W R454 401 024 7400 CARBON 10K JA 1/6W R145...
- Page 20 F5TT Ref. No. Part No. Description Ref. No. Part No. Description R838 401 162 3708 MT-GLAZE 4.7K JA 1/10W D191 408 008 2406 DIODE 1N4148 R839 401 255 6500 MT-GLAZE 100 JA 1/10W 407 013 4306 DIODE 1S2076A R840 401 255 6500 MT-GLAZE 100 JA 1/10W D1910...
- Page 21 F5TT Ref. No. Part No. Description Ref. No. Part No. Description 407 007 7801 DIODE EU2Z 405 067 0107 TR 2SC2688(1)-M D634 407 009 8905 DIODE RU3M 406 000 3605 TR 2SC3620(LB-SAN-1) D635 407 009 8905 DIODE RU3M Q751 405 134 5905 TR 2SA1037AK-T146-R D641 407 099 5600...
- Page 22 8. This circuit diagram covers a basic or representative chassis only. There W: Wire wounding Rated wattage (1/2W) POSISTER may be some components or partial circuit differences between the SERVICE C20LB87B-00 C: Solid Q,R,S RESISTOR actual chassis and the circuit diagram. REF. NO.
- Page 23 Waveforms & Voltages (On the Main Board) IC201 (IF/VIDEO/CHROMA) :: Pin-1: GND 4.5V 0.4V 5.3V 1.0V 1.5V 1.5V 4.9V 10: 4.6V 0.6V 2.4V 4.7V 5.4V 5.1V 4.4V 2.5V 19: 2.3V 2.4V 4.1V 8.6V 2.5V 2.6V 5.2V 4.8V 1.0V 28: 2.6V 3.4V 2.5V 2.7V...
- Page 24 NEWSAN S. A. Una empresa del grupo SANYO Electric Co. Sep. /’01...