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SERVICE MANUAL Colour Television
VIDEO
AUDIO
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 inputs: Phono jack
Audio inputs: Phono jack
Sound Output (RMS) . . . . 2W
Speakers . . . . . . . . . . . 5 cm x 9 cm x 2 pcs.
Dimensions . . . . . . . . . 496 (W)
Weight . . . . . . . . . . . . . approx. 17.4 Kg
Specifications subject to change without notice.
F3BH
NOBLEX
NOBLEX
-
+
MENU
CH
2 (1Vp - p, 75Ω)
2 (436mVrms, more than 40KΩ)
463 (H)
471 (D) mm
NOBLEX
FILE NO.
Model No. 20TC661
Service Ref. No. 20TC661-00
Product Code: 111325907
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.
(Argentina)
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Summary of Contents for Noblex 20TC661
- Page 1 NOBLEX FILE NO. SERVICE MANUAL Colour Television Model No. 20TC661 (Argentina) Service Ref. No. 20TC661-00 NOBLEX NOBLEX VIDEO AUDIO MENU Specifications Product Code: 111325907 Power Source ..AC220V, 50Hz / 60Hz Receiving System ..PAL (M/M, N/N), NTSC (M/M)
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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... - Page 4 Chassis Block Diagrams SYSTEM CONTROL...
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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 IC001 < Audio AMP. > LA42052-E 30KΩ 300Ω POWER FILTER INPUT IC501 < Vertical Output > LA78040N, TDA9302H Thermal Protection Pump...
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Page 8: Service Adjustments
This set has an On-screen Service Menu system includ- ed in the CPU thar allows remote operation for most of the service adjustments. Service Adjustment-1 NOBLEX NOBLEX 1. Enter the Service Menu While pressing the MENU button on the televi- sion, press the Number Key 2 on the remote control unit. - 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. Item Initial value Range Description RFAGC 00~63 RF AGC adjustment H-PHA 00~31 H-PHASE adjustment (50Hz) V-POS 00~63 Vertical position adjustment (50Hz)
- 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 Item 01 [RFAGC] AGC Item 12 [OSDHP] OSD POSITION NOTE: Do not attempt this adjustment with weak signal. (1) Receive a monochrome circular pattern. (1) Tune the receiver to most clearest (or strongest) VHF (2) Set the brightness and contrast to normal. station in your area.
- Page 12 R423A C432 R432 Q432-H6 C355 R433 JP476 Q432-H7 C465 R435H2 R355 C433 C465A C434 L462H2 T471-H3 T471-H2 T471-H1 C442-H1 C424-H1 NOBLEX Q432-H3 C423-H2 C425-H1 T471 T471-H4 Q432-H2 (FBT) F.B.T. T471-H5 Q432-H1 T471A Q432 C442-H3 1AV0U10B22200 T471-H6 H-OUT T471-H7 JXMMA C442-...
- Page 13 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). NOBLEX NOBLEX 1. Enter Service Menu...
- Page 14 Service Adjustments Service Adjustment-3 FOCUS ADJUSTMENT HIGH VOLTAGE CHECK (1) Receive the monochrome circular pattern. Note: +B (+130V) Voltage Check and Grayscale Adjustment (2) Set the brightness to normal and contrast to maximum. must be completed before attempting High Voltage Check. (3) Adjust the focus control on the F.B.T.
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Page 15: 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 16: Cabinet Parts List
SPRING-HKG-S6KL 610 260 6317 DEC INLAY-F3BA 610 260 6676 BUTTON UNITED-F3BC 610 260 7192 ASSY,CABINET FR-F3BC 610 291 9189 BADGE NOBLEX-C4CA 610 260 4917 CABINET BACK-F3BB 610 315 5210 LABEL RATING-F3BH 645 042 8968 ASSY,REMOCON JXMMA 610 288 0397 RC-BATTERY LID... -
Page 17: Chassis Electrical Parts List
Chassis Electrical Parts List F3BH 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 F3BH Ref. No. Part No. Description Ref. No. Part No. Description Q613 405 171 4107 TR 2SK2647 405 151 8705 TR 2SC536NG-NPA Q625 405 013 6801 TR 2SC2274-E 405 020 7501 TR 2SC945A-PA 405 013 7006 TR 2SC2274-F 405 020 7709 TR 2SC945A-QA Q641 406 000 6804...
- Page 19 F3BH Ref. No. Part No. Description Ref. No. Part No. Description 409 172 1509 IC MC78M05CT C433 403 076 3102 CERAMIC 3900P K 500V 409 320 5700 IC UPC78M05AHF C434 403 051 3103 ELECT 47U M IC801 410 527 1907 IC LC863440W-53Z0-TLM C441 403 346 6901...
- Page 20 F3BH Ref. No. Part No. Description Ref. No. Part No. Description 403 041 8804 ELECT 10U M R222 401 105 0504 MT-GLAZE 1K JA 1/16W C665 403 043 0202 ELECT 220U M R223 401 105 0504 MT-GLAZE 1K JA 1/16W C681 403 040 5408 ELECT...
- Page 21 F3BH Ref. No. Part No. Description Ref. No. Part No. Description R615 401 025 7409 CARBON 220 JA 1/6W R841 401 105 5301 MT-GLAZE 4.7K JA 1/16W R616 401 025 4606 CARBON 18K JA 1/6W R842 401 105 5301 MT-GLAZE 4.7K JA 1/16W R619 401 016 1508...
- Page 22 F3BH Ref. No. Part No. Description Ref. No. Part No. Description D1908 407 149 0807 DIODE 1SS355-TE-17 407 057 2801 ZENER DIODE RD6.2EB3 D1909 407 149 0807 DIODE 1SS355-TE-17 D662 407 099 5600 ZENER DIODE MTZJ6.8A D1910 407 206 5608 ZENER DIODE UDZS-TE-1710B 408 047 8605 ZENER DIODE MTZJ6.8A...
- Page 23 F3BH Ref. No. Part No. Description Ref. No. Part No. Description 405 041 6507 TR 2SC2621-D-RA COIL 405 041 6705 TR 2SC2621-E-RA L701 645 001 4826 INDUCTOR,180U K 405 066 9903 TR 2SC2688(1)-K DIODE 405 067 0008 TR 2SC2688(1)-L 405 067 0107 TR 2SC2688(1)-M D741 407 012 4406...
- Page 24 NOBLEX July/’04...
- Page 25 12 X 10 =12K SERVICE Rated wattage (1/2W) W: Wire wounding 20TC661-00 may be some components or partial circuit differences between the C: Solid actual chassis and the circuit diagram. REF. NO. 9. Parts specified with "X" are not installed in this model.
- Page 26 Waveforms & Voltages CRT BOARD (Component Location) (On the Main Board) 1AA4B10E6900B IC001 (AUDIO AMP.) Pin-1 1.1V 0.7V 0.7V 0.7V 14.8V Q701 R741 B-OUT D741 D742 J702 IC201 (IF/VIDEO/CHROMA) Q701-L D754 Q711 Pin-1 2.3V 2.2V 2.7V 1.7V 2.9V 2.9V 5.0V 2.3V L700 Q721...
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