Sanyo CM21KX81 Service Manual

Colour television

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SERVICE MANUAL Colour Television

TV/AV MENU

VIDEO

L-AUD IO-R

TIMER

TV/AV

-/--

BASS

A B

SURROUND

CH SCAN

SWAP

PIC MODE

JXMYA

Specifications

Power Source . . . . . . . . . AC110-240V, 50Hz/60Hz.

Colour System . . . . . . . . PAL/SECAM/NTSC4.43/NTSC/PAL-60Hz

Television System . . . . . . B/G, D/K, K', I, 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 ✕ 2 (1Vp - p, 75Ω)

Audio inputs: Phono jack (L/R) ✕ 2(436mVrms, more than 40KΩ)

Video monitor outputs: Phono jack ✕ 1(1Vp - p, 75Ω)

Audio monitor outputs: Phono jack (L/R) ✕ 1(436mVrms, less than 600Ω)

Sound Output (RMS) . . . . 5W + 5W

Speaker . . . . . . . . . . . . . 6 cm ✕ 12 cm ✕ 2 pcs.

Dimensions . . . . . Model CM21KX81/A: 625 (W) ✕ 460.5 (H) ✕ 384 (D)mm

Model CM21LX81/A: 645 (W) ✕ 465 (H) ✕ 484 (D)mm

Model CM21MX81/A: 645 (W) ✕ 465 (H) ✕ 484 (D)mm

Weight

. . . . . . . . Model CM21KX81/A: approx. 21.2 Kg

Model CM21LX81/A, CM21MX81/A: approx. 20.8 Kg

Specifications subject to change without notice.

C4VW/C4VWA/C5RR/C5RRA/C6YR/C6YRA

VIDEO

L-AUD IO-R

TV/AV MENU

FILE NO.

Model No. CM21KX81

Service Ref. No. CM21KX81-00

VIDEO

L-AUD IO-R

TV/AV MENU

Product Code: 111358217

Original Version

Chassis Series: AC5-G1

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

specification table.

REFERENCE NO.

CM21KX81A

CM21LX81

CM21LX81A

CM21MX81

CM21MX81A

(Middle East)

CM21KX81A-00

CM21LX81-00

CM21LX81A-00

CM21MX81-00

CM21MX81A-00

(CM21KX81)

111358247

(CM21KX81A)

111368013

(CM21LX81)

111368033

(CM21LX81A)

111368713

(CM21MX81)

111368733

(CM21MX81A)

5110573

Table of Contents

Summary of Contents for Sanyo CM21KX81

Page 1 Speaker ... . . 6 cm ✕ 12 cm ✕ 2 pcs. Dimensions ..Model CM21KX81/A: 625 (W) ✕ 460.5 (H) ✕ 384 (D)mm This T.V. receiver will not work properly in Model CM21LX81/A: 645 (W) ✕...
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. > LA76818 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> LA76818...
Page 7: Service Information
IC Block Diagrams IC501 < Vertical Output > LA78040/TDA9302H Thermal Protection Pump IC3701 < Audio Control / Surround > NJW1142MP SR-FIL MONa TONE Ha TONE La LINEa OUT a IN 1a IN 2a VOL 2 TONE VOL 1 IN 3a NJRC IIC BUS IN 4a...
Page 8: Service Adjustments With Replacing Memory Ic(Ic802)
TV /AV ME NU Model CM21LX81/A Model CM21KX81/A CM21MX81/A Press and hold for more than 2 seconds Press the PROGRAMME UP on the TV set while the above On-Screen Display is still on the screen. The following picture appears on the screen.
Page 9 Service Adjustments with Replacing Memory IC(IC802) 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 DATA INITIAL DATA INITIAL ITEM RANGE SETUP DESCRIPTION ITEM RANGE...
Page 10 Service Adjustments with Replacing Memory IC(IC802) DATA INITIAL DATA INITIAL ITEM RANGE SETUP DESCRIPTION ITEM RANGE SETUP DESCRIPTION DATA DATA TUNER Tuner Option 0~255 ROM Correction AV123 AV1/AV2/AV3 Option, 0=AV only, 0~255 ROM Correction 1=AV1, AV2, 2~3=AV1, AV2,AV3 0~255 ROM Correction 88 OPT POS Programme number Option, 0~255...
Page 11: Service Adjustments With Replacing Memory Ic (Ic802)
RF AGC TV /AV ME NU Item No. Data value Item Model CM21LX81/A Model CM21KX81/A CM21MX81/A Select item by pressing the TIMER (Item No. UP) or SOUND MUTE (Item No. DOWN) button on the remote control handset. TIMER ...92➔93➔94➔95➔96..01 01➔02➔03➔04➔05..96...
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 05 [V-SCO] V-S CORRECTION Item 01 [RF AGC] AGC NOTE: Do not attempt this adjustment with weak signal.
Page 13 Service Mode Adjustments Items 14-17, 19-21 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-14 RBIAS, 15 GBIAS, 16 BBIAS, 17 RDRIV and 19 BDRIV mode to 64. (5) Select Item-20 mode to be one horizontal scanning line and turn the screen volume on the FBT to obtain just visible one coloured line.
Page 14: Service Adjustments
Service Adjustments Following adjustments are not required to readjust when replacing the memory IC. B-VOLTAGE SUPPLY CHECKING HIGH VOLTAGE CHECK (1) Connect DC meter to TP-B and the ground. Note: +B (+130V) Voltage Check and Grayscale Adjustment (2) Tune the receiver to an active channel and synchro- must be completed before attempting High Voltage Check.
Page 15: Special Function
(Pre-set) is not possible. The Channel Swapping function also is not possible. TUNING LOCKED Model CM21LX81/A Model CM21KX81/A CM21MX81/A (3) Music Mode setting When Music Mode is ON, Programme position from “91” to “99” Select an item of the special functions by pressing the and “0”...
Page 16: 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 17: Cabinet Parts List
Cabinet Parts List Note: Parts order must contain Service Ref. No., Part No., and descriptions. Model CM21KX81/A INPUT OUTPUT ANT. 75Ω TV/A V MENU TV/AV TIMER VIDE O L-AU DIO-R -/-- BASS SURROUND CH SCAN SWAP MENU PIC MODE JXMYA Key No.
Page 18 610 305 7361 CABINET FRONT-C5RA (ENGLISH + ARABIC) 610 305 7477 GRILLE SPEAKER-C5RA 610 309 4823 SIMPLIFIED INST_C5JR 645 040 4672 BADGE,SANYO*43.5X10L43.5 (SPANISH + RUSSIAN) 645 041 7269 BADGE,SANYO*43.5X10L43.5 610 305 7385 CABINET BACK-C5RA 610 310 1118 LABEL RATING-C5RR (MODEL CM21LX81)
Page 19: Cabinet Parts List
610 310 8476 CABINET FRONT-C6YG (ENGLISH + ARABIC) 610 305 7415 DEC SPEAKER-C5RA 610 309 4823 SIMPLIFIED INST_C5JR 645 040 4672 BADGE,SANYO*43.5X10L43.5 (SPANISH + RUSSIAN) 645 041 7269 BADGE,SANYO*43.5X10L43.5 610 305 7385 CABINET BACK-C5RA 610 311 4736 LABEL RATING-C6YR (MODEL CM21MX81)
Page 20: Chassis Electrical Parts List
C6YR Chassis Electrical Parts List Model CM21KX81/A, CM21LX81/A, CM21MX81/A 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 21 C6YR Ref. No. Part No. Description Ref. No. Part No. Description Q613 405 181 4609 TR 2SK3264 405 015 8902 TR 2SC2812-L7-TB Q614 405 006 6504 TR 2SA984-E 405 173 9803 TR 2SC3928A1R 405 006 6702 TR 2SA984-F 405 173 9902 TR 2SC3928A1S Q615 406 000 6804...
Page 22 C6YR Ref. No. Part No. Description Ref. No. Part No. Description C1002 404 084 8905 ELECT 10U M C234 403 215 2201 CERAMIC 0.01U K 403 049 4204 ELECT 10U M C243 403 215 2201 CERAMIC 0.01U K C1007 404 087 1606 ELECT 0.1U M C244...
Page 23 C6YR Ref. No. Part No. Description Ref. No. Part No. Description C432 403 075 7101 CERAMIC 1000P K 500V 403 045 1504 ELECT 1000U M C433 403 076 3102 CERAMIC 3900P K 500V C645 404 088 6600 ELECT 2200U M C434 404 087 6007 ELECT...
Page 24 C6YR Ref. No. Part No. Description Ref. No. Part No. Description R124 401 105 0603 MT-GLAZE 10K JA 1/16W R423 401 022 4104 CARBON 68K JA 1/4W R125 401 105 3406 MT-GLAZE 27K JA 1/16W R424 401 024 7004 CARBON 1K JA 1/6W R130...
Page 25 C6YR Ref. No. Part No. Description Ref. No. Part No. Description R682 401 025 8208 CARBON 22K JA 1/6W L171 645 049 3379 TRANS,OSC,38MHZ R683 401 105 6100 MT-GLAZE 560K JA 1/16W 645 054 0271 TRANS,OSC,38MHZ R684 401 105 0603 MT-GLAZE 10K JA 1/16W L431...
Page 26 C6YR Ref. No. Part No. Description Ref. No. Part No. Description 407 012 4406 DIODE 1SS133 D662 407 007 7405 DIODE EU1 407 013 4306 DIODE 1S2076A D663 407 005 4505 DIODE DS442X 407 013 7109 DIODE 1S2473 408 008 2406 DIODE 1N4148 D3701 407 005 4505...
Page 27 C6YR Ref. No. Part No. Description Ref. No. Part No. Description 610 311 8949 ASSY,PWB,CRT C5RA 1AA0B10S1240B TRANSISTOR Q701 405 041 6507 TR 2SC2621-D-RA 405 041 6705 TR 2SC2621-E-RA 405 066 9903 TR 2SC2688(1)-K 405 067 0008 TR 2SC2688(1)-L 405 067 0107 TR 2SC2688(1)-M Q703 405 041 6507...
Page 28 A14800/Nov./’03/30 BB SANYO Electric Co., Ltd. Printed in Japan...
Page 29 N: Metalized carbon Kind (M.carbon) 8. This circuit diagram covers a basic or representative chassis only. There S: Oxied metalized CM21KX81/A-00 W: Wire wounding may be some components or partial circuit differences between the Rated wattage (1/2W) POSISTER...
Page 30 CRT BOARD (Component Location) Waveforms & Voltages (On the Main Board) R713 Q701 IC001 (AUDIO AMP.) R719 (B-OUT) R711 L702 Q701A Pin-1 12.7V 5.9V 5.9V 6.8V 1.5V 1.5V 0.4V 5.9V 5.9V R712 IC201 (IF/VIDEO/CHROMA) Pin-1 2.3V 2.2V 2.5V 2.2V 2.9V 2.9V 5.0V 2.5V...

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Sanyo CM21KX81 Service Manual

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