Noblex 21TC647 Service Manual

Hide thumbs

Table Of Contents

Table of Contents

Quick Links

Download this manual

NOBLEX

SERVICE MANUAL Colour Television

Specifications

Power Source . . . . . . . . .AC110V-240V, 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 (R/L)

Headphone Jack: Mini stereo jack

Sound Output (RMS) . . . .3W + 3W

Speakers . . . . . . . . . . .5cm

Dimensions . . . . . . . . .Model 21TC647: 606 (W)

Model 29TC649: 656 (W)

Weight . . . . . . . . . . . . .Model 21TC647: approx.

Model 29TC649: approx.

Specifications subject to change without notice.

C4BA/C4BAS/C4CA

NO BL EX

2 (1Vp - p, 75Ω)

2 (436mVrms, more than 40KΩ)

9cm

483(H)

496(H)

NO BL EX

Product Code: 1 113 549 00 (21TC647)

Original Version

Chassis Series: LA4-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

479(D)mm

foreign countries where the television trans-

600(D)mm

mission system and power source differ from

the design specifications. Refer to the specifi-

cation table.

FILE NO.

Model No. 21TC647

29TC649

(Argentina)

Service Ref. No. 21TC647-00

21TC647-01

29TC649-00

1 113 550 00 (29TC649)

Table of Contents

Need help?

Do you have a question about the 21TC647 and is the answer not in the manual?

Questions and answers

Summary of Contents for Noblex 21TC647

Page 1 Model 29TC649: 656 (W) 496(H) 600(D)mm mission system and power source differ from Weight ... . .Model 21TC647: approx. the design specifications. Refer to the specifi- Model 29TC649: approx. cation table.
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. > 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 IC001 < Audio AMP. > LA4600 Standby Standby SW Ch1 input Pre- Output Input drive Ch1 output amplifier amplifier amplifier Large signal Small signal TSD protector amplifier Pre- Output drive Input Ch2 output amplifier amplifier amplifier Ch2 Input Ripple filter Pop noise prevention block Filter...
Page 7: Ic Block Diagrams
IC Block Diagrams IC3401 < MTS Decoder, Audio Control & Switch> UPC1851BCU Power Supply Analog Ground Volume Control Block L-channel Offset Absorption 2.2µF R-channel Offset Absorption 0.022µF L-channel Capacity of R-channel Capacity of High Frequency Tone Control Block High Frequency Band Width Band Width R-channel Capacity of Low Frequency...
Page 8: 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 9 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 10 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 of Read Status STEREO IC...
Page 11 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 12 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 13 Service Adjustments with Replacing Memory IC(IC802) [3] Service Adjustments-2 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 STEREO VCO 00~63 FILTER 00~63 LOW SEOARATION 00~63 HIGH SEPARATION 00~63...
Page 14 Service Adjustments with Replacing Memory IC(IC802) SOUND LEVEL ADJUSTMENT TP-317 MAIN BOARD 1. Connect a signal generator to TP-301(- side of C3407) on the Main Board and the ground. Signal output=300Hz, 150mVrms. 2. Connect a DC Volt-Meter to TP-317( + side of C3437) and the ground.
Page 15 Service Adjustments with Replacing Memory IC(IC802) TP-317 MTS FILTER ADJUSTMENT MAIN BOARD 1. Connect a signal generator to TP-301(- side of C3407) and the ground. Signal output=15.734KHz, 100mVrms. 2. Connect a DC Volt-Meter to TP-317( + side of C3437) and the ground.
Page 16 Service Adjustments with Replacing Memory IC(IC802) TP-317(R) 5. Adjust level of 300Hz at TP-317 (+ side of C3437) to Minimum leakage become minimum level by pressing the VOLUME(+/ -) button on the remote control or TV set. 300Hz 6. Select “HI SEPARATION” by pressing the CHANNEL UP/DOWN button on the remote control or TV set.
Page 17: Service Adjustments With Replacing Memory Ic (Ic802)
Service Adjustments with Replacing Memory IC(IC802) [4] Service Adjustment-3 FINE TUNING This adjustment is used to do a fine tuning of the channels with poor reception after they have been stored by the auto- matic tuning. This function is available for one channel only and the fine-tuned channel is memorized into IC802 (EEPROM). Press and hold the MENU button on the TV set and press the 4 or MENU button on the remote control handset to enter to the service mode.
Page 18: Service Adjustments
Service Adjustments Following adjustments are not required to readjust when replacing the memory IC. MAIN BOARD F.B.T. T401 Q432 HORIZ. OUT FOUCUS VR (Upper side) FOCUS 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.
Page 19: 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 20: Cabinet Parts List
610 288 9277 DEC CONTROL SHEET 610 288 9185 CABINET FRONT 610 287 9384 BADGE NOBLEX 610 273 5185 CABINET BACK 610 288 9482 LABEL RATING (Service Ref. No. 21TC647-00) 610 288 9826 LABEL RATING (Service Ref. No. 21TC647-01) -20-...
Page 21: Cabinet Parts List
610 277 8403 BUTTON UNITED 610 290 3089 INSTRUCTIONS MANUAL 610 104 2505 LATCH PUSH 610 288 9277 DEC CONTROL SHEET 610 288 9208 CABINET FRONT 610 287 9384 BADGE NOBLEX 610 288 9222 CABINET BACK 610 288 9499 LABEL RATING -21-...
Page 22: Chassis Electrical Parts List
C4BA Chassis Electrical Parts List Service Ref. No. 21TC647-00 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 23 C4BA Ref. No. Part No. Description Ref. No. Part No. Description 405 002 0308 TR 2SA1037K T146 R IC611 410 326 4901 IC STR-F6654 LF1351 405 002 0407 TR 2SA1037K T146 S IC631 409 172 8102 IC SE130NH 405 002 6706 TR 2SA1179-M6-TB IC651 409 241 5407...
Page 24 C4BA Ref. No. Part No. Description Ref. No. Part No. Description C3413 403 049 0008 ELECT 1U M 403 232 1409 CERAMIC 220P K C3414 403 090 3607 TA-SOLID 10U K C614 403 138 9905 POLYESTER 470P J C3416 403 049 0008 ELECT 1U M 403 276 9102...
Page 25 C4BA Ref. No. Part No. Description Ref. No. Part No. Description R108 401 026 1307 CARBON 27K JA 1/6W R3422 401 024 6700 CARBON 100 JA 1/6W R109 401 162 3005 MT-GLAZE 22K JA 1/10W R3440 401 256 3805 MT-GLAZE 1.5K JA 1/10W R1101 401 007 7601...
Page 26 C4BA Ref. No. Part No. Description Ref. No. Part No. Description R684 401 150 5905 MT-GLAZE 10K JA 1/10W D009 407 099 5808 ZENER DIODE MTZJ7.5A R685 401 012 5708 CARBON 1K JA 1/4W 407 057 6304 ZENER DIODE RD7.5EB1 R686 401 012 7009 CARBON...
Page 27 C4BA Ref. No. Part No. Description Ref. No. Part No. Description D613 407 006 0100 DIODE ERA91-02 405 066 9903 TR 2SC2688(1)-K D614 407 099 7000 ZENER DIODE MTZJ15B 405 067 0008 TR 2SC2688(1)-L 407 054 5805 ZENER DIODE RD15EB2 405 067 0107 TR 2SC2688(1)-M D615...
Page 28: Chassis Electrical Parts List
C4BAS Chassis Electrical Parts List Service Ref. No. 21TC647-01 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 29 Chassis Electrical Parts List C4CA Service Ref. No. 29TC649-00 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 30 C4CA Ref. No. Part No. Description Ref. No. Part No. Description 405 002 0308 TR 2SA1037K T146 R INTEGRATED CIRCUIT 405 002 0407 TR 2SA1037K T146 S IC001 409 389 4607 IC LA4600 405 002 6706 TR 2SA1179-M6-TB IC191 409 241 5407 IC BA178M05T 405 002 6904 TR 2SA1179-M7-TB...
Page 31 C4CA Ref. No. Part No. Description Ref. No. Part No. Description C3404 403 050 6600 ELECT 3.3U M C608 404 073 5106 CERAMIC 470P K 250V C3406 403 166 1605 NP-ELECT 4.7U M 404 073 3300 CERAMIC 470P M 250V C3407 403 049 9803 ELECT...
Page 32 C4CA Ref. No. Part No. Description Ref. No. Part No. Description R003 401 256 0408 MT-GLAZE 12K JA 1/10W R261 401 162 3104 MT-GLAZE 3.3K JA 1/10W R004 401 256 0309 MT-GLAZE 820 JA 1/10W R262 401 025 7409 CARBON 220 JA 1/6W R006...
Page 33 C4CA Ref. No. Part No. Description Ref. No. Part No. Description T431 652 000 0704 TRANS,DRIVE R608 402 000 8305 SOLID 5.6M KA 1/2W T611 652 000 1053 TRANS,POWER,PULSE R609 402 000 8305 SOLID 5.6M KA 1/2W R611 401 069 4501 OXIDE-MT 68K JA COIL...
Page 34 C4CA Ref. No. Part No. Description Ref. No. Part No. Description D491 407 124 6404 DIODE ERA18-04 645 006 4708 JACK,PHONE D3.6 407 007 6606 DIODE ES1 K1111 645 002 0568 TERMINAL,BOARD 407 124 5506 DIODE RMPG06G PS602 408 013 3801 TH PTH451C262BF140M270 D501 407 005 7308...
Page 35 C4CA Ref. No. Part No. Description Ref. No. Part No. Description RESISTOR R701 401 152 3206 MT-GLAZE 330 JA 1/10W R703 401 162 3609 MT-GLAZE 470 JA 1/10W R704 401 065 4604 OXIDE-MT 12K JA R705 401 009 1508 CARBON 2.7K JA 1/2W R711...
Page 36 Oct./’00...

This manual is also suitable for:

29tc649 21tc647-00 21tc647-01 29tc649-00 1 113 549 00 1 113 550 00

Noblex 21TC647 Service Manual

Quick Links

Need help?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Noblex 21TC647

Summary of Contents for Noblex 21TC647

This manual is also suitable for:

Table of Contents