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SERVICE MANUAL   Colour Television   

Product Code: 111354912

Original Version

Chassis Series: LA5-A

C4BP

FILE NO.

Model No. 21TC657

Service Ref. No. 21TC657-00

(Argentina)

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.

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 

2 (1Vp - p, 75

)

Audio inputs: Phono jack (R/L) 

2 (436mVrms, more than 40K

)

Headphone Jack: Mini stereo jack 

1

Sound Output (RMS)  . . . . 3W + 3W
Speakers   . . . . . . . . . . . 5 cm x 9 cm x 2 pcs.
Dimensions   . . . . . . . . . 606 (W) 

479 (H) 

483 (D)mm 

Weight  . . . . . . . . . . . . . approx. 21.0 Kg 

Specifications subject to change without notice.

NOBLEX

NOBLEX

1AV0U10B22200

JXMMA

POWER

AUDIO

 MODE

VIDEO M

ODE

5

9

6

3

0

2

8

7

4

1

SURROUND

MENU

VOL

VOL

CH

CH

NOBLEX

IMAGE 

DISPLAY

MUTE

SLEEP

REC

ALL

SOUND

NOBLEX

Summary of Contents for 21TC657

Page 1: ...ystem 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...

Page 2: ...eiver is the picture tube The picture tube is specially con structed to limit X RADIATION emissions For continued X RADIATION protection the replacement tube must be the same type as the original incl...

Page 3: ...42 FM OUTPUT EXT VIDEO IN K1001 K1002 REAR AVIN FRONT AVIN VIDEO VIDEO A L A L A R A R 19 20 21 R G B K1921 12 8 AC POWER CIRCUIT CONVERTER TRANS 130V MAIN HIGH 20V AUDIO 12V MAIN LOW 24V VERT 9V IC20...

Page 4: ...Chassis Block Diagrams 4 SYSTEM CONTROL QXXAVC479P 15 C CAPTION IN...

Page 5: ...MP V C VCC 5V 46 47 48 49 50 A2C PLL 51 52 53 54 Audio Output FM Output Selected Audio Output PIF AGC RF AGC Output PIF Input1 PIF Input 2 IF Ground IF Vcc FM Filter AFT Output Bus Data Bus Clock ABL...

Page 6: ...it Amp 54 10p SIF In Sound BPF VCO Coil VCO COIL1 VCO COIL2 48 49 VIF VCO Chroma Counter B N INV IF Ident OSC C D Amp SIF Sys 2bit pre scaller SIF VCO 500K BPF SIF APC Filter 1K 0 01u 1000p 53 LIM AMP...

Page 7: ...4 LSOUT L 3 LSOUT R VOL R VOLUME RIGHT CHANNEL INPUT 43 44 TREBLE OUT R 41 47 TREBLE FILTER L 45 2 BASS FILTER L 40 SURRTC 38 TVOUT R 39 TVOUT L 36 37 AUX2 L Left channel external input FEXT2 INPUT P...

Page 8: ...Adjustments Press the CHANNEL UP or CHANNEL DOWN button on the remote control handset to select the desired service menu item you want to adjust Use the VOLUME or to adjust the data The or button will...

Page 9: ...ateral line 23 DRV Brightness and dark of White balance adjustment 24 B YD 10 00 15 B Y DC Level 25 R YD 10 00 15 R Y DC Level 26 B YND 0 16 15 Difference value of NTSC B Y DC Level 27 R YND 0 16 15 D...

Page 10: ...00 00 01 Adjustment of AFC Gain Gate RF 66 VSURF 00 00 01 Adjustment of Vertical Sync Separation Sensitivity RF 67 CDMRF 00 00 07 Vertical Count Down Loop Adjustment RF 68 AFCAV 00 00 01 Adjustment of...

Page 11: ...nd contrast to maximum 3 Select Item No 04 V SIZ in the service mode 4 Change value to be optimum vertical size 5 Exit from the service mode 1 Receive a monochrome circular pattern 2 Set the brightnes...

Page 12: ...e adjustment is made after picture tube replacement check the high voltage Items 16 23 GREY SCALE Service Adjustments E E B 3 3 T471 H1 T471 H2 T471 H4 T471 H5 T471 H6 T471 H7 T471 H10 T471 R449 D485...

Page 13: ...OOSE EXIT MENU 2 Service Adjustments Press the CHANNEL UP or CHANNEL DOWN button on the remote control handset to select the desired service menu item you want to adjust Use the VOLUME or to adjust th...

Page 14: ...18 JP002 J150 R031 C042 C041 R006 J119 C005 R005 J121 R003 J122 C004 J125 J126 R029 J127 J128 J129 J130 R019 J028 JP652 J139 J143 J141 R662 J142 R036 D1001 JP029 J132 R528 D653 R1907 J075 JW1 JW4 C652...

Page 15: ...tored in memory Service Adjustment 3 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...

Page 16: ...egative lead to ground and connect lead to anode of picture tube 2 Tune receiver to an active channel and confirm TV is operating properly 3 The high voltage must be 14 21KV 1KV 20 21 25KV 1KV 29 26 5...

Page 17: ...lours to check this use bias controls Readjust the yoke position if necessary until all screens are pure 7 Adjust each Bias control and screen control to obtain white raster Refer to Gray Scale Adjust...

Page 18: ...10 610 315 5265 LABEL RATING C4BP 11 645 042 8968 ASSY REMOCON JXMMA 12 610 288 0397 RC BATTERY LID 13 645 004 3925 ANTENNA CONVERTER 645 005 0251 ANTENNA CONVERTER 610 316 0931 INSTRUCTION MANUAL C4...

Page 19: ...ould 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 sig...

Page 20: ...02 TR 2SC2812N L6 TB0 405 163 1701 TR 2SC2812N L7 TB0 405 173 9803 TR 2SC3928A1R 405 173 9902 TR 2SC3928A1S Q681 405 011 8401 TR 2SC1740S Q 405 011 8500 TR 2SC1740S R 405 011 8609 TR 2SC1740S S 405 01...

Page 21: ...0V C232 403 260 2904 MT COMPO 0 33U J 50V C233 403 045 1504 ELECT 1000U M 25V C240 403 215 2201 CERAMIC 0 01U K 50V C243 403 215 2201 CERAMIC 0 01U K 50V C244 403 051 3103 ELECT 47U M 50V C245 403 086...

Page 22: ...ISTOR R003 401 026 3905 CARBON 330 JA 1 6W R006 401 026 8108 CARBON 4 7 JA 1 6W R019 401 007 7601 CARBON 150 JA 1 2W R029 401 007 7601 CARBON 150 JA 1 2W R031 401 027 5205 CARBON 680 JA 1 6W R033 401...

Page 23: ...RBON 22 JA 1 4W R620 401 010 4802 CARBON 470K JA 1 2W R621 401 010 4802 CARBON 470K JA 1 2W R622 401 019 9600 CARBON 47 JA 1 4W R623 401 026 4902 CARBON 330K JA 1 6W R624 402 001 8502 FUSIBLE RES 10 J...

Page 24: ...55 TE 17 D1910 407 206 5608 ZENER DIODE UDZS TE 1710B D249 407 099 6003 ZENER DIODE MTZJ9 1B D352 407 063 8705 ZENER DIODE MTZJ5 1C 407 056 9801 ZENER DIODE RD5 6EB1 D421 407 099 7208 ZENER DIODE MTZJ...

Page 25: ...1 E RA 405 066 9903 TR 2SC2688 1 K 405 067 0008 TR 2SC2688 1 L 405 067 0107 TR 2SC2688 1 M Q711 406 000 3605 TR 2SC3620 LB SAN 1 405 041 6507 TR 2SC2621 D RA 405 041 6705 TR 2SC2621 E RA 405 066 9903...

Page 26: ...406 DIODE 1SS133 D752 407 012 4406 DIODE 1SS133 D753 407 012 4406 DIODE 1SS133 D754 407 012 4406 DIODE 1SS133 MISCELLANEOUS K701 645 026 2005 SOCKET CRT 8P 652 001 0321 SOCKET CRT 8P 652 001 1465 SOCK...

Page 27: ...27...

Page 28: ...July 04 NOBLEX...

Page 29: ...GQBZ 1 16GJ 100KAZ KK 5600 GQBZ 1 16 GJ1MAZ PM4 7LBZA 1 16GJ220AZ 1 16GJ220AZ KK 0 022 GQBZ KK 4700 GQBZ EM0 1 LBWA KK4700 GQBZ EM0 1 LBWA 1 16GJ 62KAZ EM0 47 LBWA 16EM47 LBWA EM4 7 LBWA 16EM 100 EM4...

Page 30: ...R1907 J075 JW1 JW3 JW4 D1901 R423 C652 J051 D512 R831 J090 D861 D646 R830 VR462 J140 R602A C033 JP030 JP441 JP3402 L441A C465A PS601 R602 H3 IC002 IC001 J013 C355 J152 JP003 J008 J155 J151 JP004 JP00...

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