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Sanyo CM21AF8 Service Manual

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SERVICE MANUAL Colour Television
Specifications
Power Source . . . . . . . . .AC110-240V, 50/60Hz.
Colour System . . . . . . . .PAL, SECAM, NTSC4.43, NTSC, PAL-60Hz
Television System . . . . . .B/G, D/K, K', M/M
Channel Coverage . . . . .VHF: E2-E12, R1-R12, K1-K9, A2-A13, J1-J12
UHF: 21-69, A14-A69, J13-J62
CATV: S1-S41, X, Y, Z, Z+1, Z+2
Video IF . . . . . . . . . . . . . 38.0MHz
Aerial Input Impedance . . 75Ω
Ext. Terminals
Video inputs: Phono jack
S-Video input
Audio inputs:Phono jack (R/L)
Video monitor outputs: Phono jack
Audio monitor outputs: Phono jack(R/L)
(436mVrms, Impedance less than 600Ω)
Headphone jack: Mini stereo jack
Speakers ......... 5cm
12cm
Sound Output (Music) . . . 3W + 3W
Dimensions
. . . . . . . . . . 587(W)
Weight . . . . . . . . . . . . . .approx. 21.8 Kg
Specifications subject to change without notice
C2GR/C2GRA
-
+
P
2 (1.0Vp-p, impedance 75Ω)
1 (Din 4 pin, Separate Y/C Signals Input)
2 (436mVrms, impedance more than 40KΩ)
1 (1.0Vp-p, 75Ω)
1
1
2
458(H)
486(D)mm
FILE NO.
Model No. CM21AF8
Service Ref. No. CM21AF8-00
TIMER
TV/AV
1
2
3
4
5
6
7
8
9
0
-/--
P
MENU
ZOOM
P
VSM
SWAP
CH SCAN
P
P
ASM
SURROUND
A•B
BBE
BASS
JXMLB
Product Code:
1 113 514 13 (CM21AF8)
1 113 514 33 (CM21AF8A)
Original Version
Chassis Series: FC1-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
transmission system and power source
differ from the design specifications. Refer
to the specification table.
REFERENCE NO.
CM21AF8A
(Middle East)
CM21AF8A-00
SM
5110141

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Summary of Contents for Sanyo CM21AF8

  • Page 1 Specifications Product Code: Power Source ..AC110-240V, 50/60Hz. 1 113 514 13 (CM21AF8) Colour System ..PAL, SECAM, NTSC4.43, NTSC, PAL-60Hz 1 113 514 33 (CM21AF8A) Television System ..B/G, D/K, K’, M/M Channel Coverage .

  • 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. > 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 IC281 < SECAM > M52325AP IC3401 <BBE> QBA3880AFS 0.1µF BAND 24 DETL BELL auto 2 auto 1 DETR BANDGAP CVBS BELL 22 DEFL DEFR FILTER 21 VCC – -(B-Y) OUTPUT BELL SECAM HI MID BELL ref. EMPHASIS 20 VCAL IDENT VCAR...
  • Page 7 IC Block Diagrams IC001A < Sound Output > LA4270 LA4270 Thermal Shutdown Over Voltage Ripple Filter...

  • Page 8: Service Adjustments

    Service Adjustments B-VOLTAGE SUPPLY CHECK MAIN BOARD C641 HORIZONTAL WIDTH ADJUSTMENT FOCUS ADJUSTMENT FOCUS ADJUSTMENT HORIZONTAL WIDTH ADJUSTMENT (1) Receive the monochrome circular pattern. (1) Tune receiver to an active channel. (2) Set the brightness to normal and contrast to maximum. (2) Adjust H-Width Control (VR462) for proper width.

  • Page 9: 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 10 Service Adjustments with Replacing Memory IC(IC802) [2] Required Service Adjustments Readjust the following service adjustments. Adjustments Service Mode No. & Item Horizontal centre adjustment Item 01, H-P Vertical centre adjustment Item 02, V-P Vertical size adjustment Item 03, V-S RF AGC adjustment Item 05, AGC AFT adjustment Item 06, VCO...
  • Page 11 Service Adjustments with Replacing Memory IC(IC802) [Entering to Service Mode] Press and hold the MENU button on the TV set and press the [1] button on the remote control handset. Following setting items appears on the screen. Display for [H-P] Horizontal centre adjustment Read Status TIMER TV/AV...

  • Page 12: Service Mode Adjustments

    Service Mode Adjustments Following adjustments should be carried out when the memory IC is replaced. How to enter the service mode and adjust values, please refer to “ Entering to Service mode” on page 11. Item 01 [H-P] HORIZONTAL CENTRE Item 06 [VCO] AFT (1) Receive the monochrome circular pattern.

  • Page 13: Protection Circuit

    Service Mode Adjustments Items 23-24 GREY SCALE (1) Receive the monochrome circular pattern. (2) Set the brightness and colour to normal, contrast to TIMER TV/AV Red Drive - Red Bias + maximum. (3) Enter to the service mode. Red Bias - Red Drive + (4) Select No.

  • 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: Mechanical Disassemblies

    Mechanical Disassemblies CHASSIS REMOVAL CABINET BACK REMOVAL 1. Remove cabinet back. 1. Refer to Figure 1, remove 8 screws. 2. Discharge the picture tube anode (2nd anode lead) to the dag 2. Pull off cabinet back and remove. coating (picture tube grounding lead). 3.

  • Page 16: Cabinet Parts List

    Cabinet Parts List C2GR/C2GRA Note: Parts order must contain Service Ref. No., Part No., and descriptions. Model CM21AF8 & CM21AF8A MONITOR AV1 INPUT AUDIO S-VIDEO (MONO) ANT. 75Ω VIDEO TIMER TV/AV -/-- MENU ZOOM SWAP CH SCAN SURROUND A•B BASS JXMLB Key No.

  • Page 17: Chassis Electrical Parts List

    Chassis Electrical Parts List C2GR/C2GRA Model CM21AF8/CM21AF8A 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 18 C2GR/C2GRA Ref. No. Part No. Description Ref. No. Part No. Description 405 014 4608 TR 2SC2412K T146 S 405 006 1707 TR 2SA933S-Q 405 015 8704 TR 2SC2812-L6-TB 405 006 1806 TR 2SA933S-R 405 015 8902 TR 2SC2812-L7-TB Q191 405 134 5905 TR 2SA1037AK-T146-R Q140 405 134 5905...
  • Page 19 C2GR/C2GRA Ref. No. Part No. Description Ref. No. Part No. Description Q612 405 058 0208 TR 2SC3807-R-CTV-YA IC1201 409 051 2702 IC TC4052BF-TP1 Q613 405 096 7702 TR 2SC4430-L-YB IC1401 409 479 3206 IC MM1188XS 405 096 7603 TR 2SC4430-M-YB IC1501 409 051 2900 IC TC4053BF-TP1...
  • Page 20 C2GR/C2GRA Ref. No. Part No. Description Ref. No. Part No. Description C1307 403 157 6602 CERAMIC 470P K C3082 403 149 9208 CERAMIC 0.01U Z C1308 403 051 0607 ELECT 4.7U M C3084 403 086 2300 NP-ELECT 1U M C1309 403 051 0607 ELECT 4.7U M...
  • Page 21 C2GR/C2GRA Ref. No. Part No. Description Ref. No. Part No. Description 403 179 3207 POLYESTER 0.015U J R1036 401 027 9005 CARBON 82K JA 1/6W C616 403 246 9507 CERAMIC 1200P K R105 401 105 7909 MT-GLAZE 0.000 ZA 1/16W C617 403 060 8403 POLYESTER...
  • Page 22 C2GR/C2GRA Ref. No. Part No. Description Ref. No. Part No. Description R182 401 105 3406 MT-GLAZE 27K JA 1/16W R422 401 017 2801 CARBON 27K JA 1/4W R184 401 105 1006 MT-GLAZE 1.2K JA 1/16W R423 401 022 4104 CARBON 68K JA 1/4W R185...
  • Page 23 C2GR/C2GRA Ref. No. Part No. Description Ref. No. Part No. Description R685 401 025 8208 CARBON 22K JA 1/6W TRANSFORMER R686 401 012 7009 CARBON 10K JA 1/4W T431 610 000 1077 DRIVE TRANS R687 401 019 1901 CARBON 3.9K JA 1/4W 610 223 1656 DRIVE TRANS...
  • Page 24 C2GR/C2GRA Ref. No. Part No. Description Ref. No. Part No. Description 407 175 2905 ZD 02CZ12Z(TE85R) D351 407 099 6003 ZENER DIODE MTZJ9.1B D1081 407 071 0005 ZENER DIODE DZD12X-TA 407 057 9701 ZENER DIODE RD9.1EB2 407 071 0104 ZENER DIODE DZD12Y-TA D352 407 063 8903 ZENER DIODE MTZJ5.6C...
  • Page 25 C2GR/C2GRA Ref. No. Part No. Description Ref. No. Part No. Description D633 407 127 9402 DIODE EL1Z 408 000 4309 TH PTH451C312BD140N290 D634 407 009 8905 DIODE RU3M SW1901 645 003 4701 SWITCH,PUSH 1P-1TX1 D635 407 009 8905 DIODE RU3M 645 019 4887 SWITCH,PUSH 1P-1TX1 D642...
  • Page 26 C2GR/C2GRA Ref. No. Part No. Description Ref. No. Part No. Description CAPACITOR C703 403 157 6602 CERAMIC 470P K C705 403 157 6602 CERAMIC 470P K C707 403 157 6602 CERAMIC 470P K C708 403 077 2807 CERAMIC 1000P Z C732 403 044 1703 ELECT...
  • Page 27 SANYO Electric Co., Ltd. A14800 /July/’00 /300 SI Printed in Japan...

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Cm21af8aCm21af8-00Cm21af8a-00

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