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SERVICE MANUAL    Colour Television   

Product Code: 13007604
                        13007605

Original Version

Chassis Series: LA6-A

BC2E

 FILE NO.

Model No.  C21LF41
                 C21LF41B

Service Ref. No. C21LF41-00
                           C21LF41B-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 speci-
fication 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

Aerial Input Impedance  . .  75
Input Terminals
    AV1 (Video): Phono jack 

 1

฀฀฀฀

AV1 (Audio): Phono jack (R/L) 

 1 set 

    AV2 (Video): Phono jack 

 1 

฀฀฀฀

AV2 (Audio): Phono jack (R/L) 

 1 set 

Output Terminals
    Video Monitor Output: Phono jack 

 1

฀฀฀฀

Audio Monitor Output: Phono jack (R/L) 

 1 

    Headphone Jack: Mini stereo jack 

 1

Sound Output (RMS) . . . .  3W + 3W
Speakers  . . . . . . . . . . .  5cm x 9cm x 2 pcs.
Dimensions  . . . . . . . . .  596(W) X 493(H) X462(D) mm 
Weight  . . . . . . . . . . . . .  approx. 22 Kg 

Specifications subject to change without notice.

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POWER

Summary of Contents for C21LF41

Page 1: ...r 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 Aerial Input Impedance 75 Input Terminals AV1 Video Phono jack 1 AV1 Audio Phono jack R L 1 set AV2 Video Phono jack 1 AV2 Audio...

Page 2: ...xit from the Service Menu Press the MENU button to turn off the Service Menu display The data which is set in the service mode is stored into the memory IC automatically Service Mode Display Service Adjustment 1 1 Enter the Service Menu While pressing the MENU button on the television press the Number Key 2 on the remote control unit The Service Menu now appear IC802 EEPROM Replacement When IC802 ...

Page 3: ...ZE adjustment 60Hz 10 VSC60 0 16 15 Difference value of Vertical S compensation 60Hz 11 VLI60 0 16 15 Difference value of Vertical linearity adjustment 60Hz 12 OSDHP 37 01 255 OSD horizontal remark position 13 OSDC 04 00 07 OSD Contrast 14 V SCP 03 0 7 V SIZE COMP 15 SBIAS 31 00 127 Sub Bias adjustment 16 RBIAS 00 00 255 Red Bias adjustment 17 GBIAS 00 00 255 Green Bias adjustment 18 BBIAS 00 00 2...

Page 4: ... 54 DEEM 00 00 01 De emphasis TC 55 V LVL 06 00 07 Video Lvel 56 STRAP 04 00 07 S Trap Adjust 57 IFOM S 00 00 01 OVER MODURATION SW 58 IFMN S 00 00 01 AUDIO MONITOR SW MONITOR OR FM 59 IFTRPS 00 00 01 IC built in SIF TRAP SW ON OFF 60 OVMLVL 08 00 15 OVER MOD LEVEL 61 VBSW 00 00 01 VBLK SW 62 FBTS 00 00 01 FBPBLK SW 63 HBLKL 05 00 07 H Blanking Control Left 64 HBLKR 03 00 07 H Blanking Control Rig...

Page 5: ... Gain 86 VSHIFT 02 0 15 V SHIFT 87 CTRAP 04 0 7 C TRAP ADJUST 88 CBPF 00 0 3 C BPF ADJUST 89 C KILL 00 0 1 C_KILL ON 90 G YAMP 08 0 15 G Y AMP 91 B YDPM 0 16 15 Difference value of PALM B Y DC Level 92 R YDPM 0 16 15 Difference value of PALM R Y DC Level 93 YTH 00 0 3 Y TH 94 YGAIN 00 0 3 Y Gain 95 RWIDTH 00 0 3 R Width 96 ROFSET 00 0 3 R Offset 97 BWIDTH 00 0 3 B Width 98 BOFSET 00 0 3 B Offset 9...

Page 6: ... in the service mode 4 Change value to be optimum vertical centre position 5 Exit from the service mode Item 04 V SIZ VERTICAL SIZE 1 Receive a monochrome circular pattern 2 Set the brightness and 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 brightness and ...

Page 7: ... each colour until a dim white line produced Please see the control button alloca tions in this mode 7 Select Item 23 DRV mode to enter the white balance adjusting mode 8 Press the 7 Red Drive RECALL Red Drive 8 Green Drive or 0 Green Drive button 9 Blue Drive or SLEEP TIMER Blue Drive alternately to produce normal black and white picture 9 Exit from the service mode 10 Check for proper grey scale...

Page 8: ...ce 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 increase or decrease the data sequentially 3 Exit from the Service Menu Press the MENU button to turn off the Service Menu display The data which is set in the service mode is stored into the memo...

Page 9: ...button STEREO SEPARATION ADJUSTMENT 1 Connect an oscilloscope Probe A to TP 317 pin 38 of IC3401 and the ground Probe B to TP 318 pin 39 of IC3401 and the ground 2 Turn on the TV set and receive the multi sound programme 3 Press and hold the MENU button on the TV set and press 3 button on the remote control transmitter to enter the service mode 4 Select LOW SEPARATION by pressing the CHANNEL UP DO...

Page 10: ...vision press the 4 or MENU button on the remote control unit The Service Menu now appear 2 Service Adjustments Press and hold the VOLUME or VOLUME button on the remote control handset or TV set to make fine tuning adjustment Press and hold the VOLUME button for higher frequency tuning and press and hold the VOLUME for lower frequency tuning Entering the Service Menu Exit from the Service Menu MENU...

Page 11: ...es to the stand by mode When an abnormality occurs during TV reception it causes pin 23 of the CPU to go continually Low voltage for about one second The CPU detects that this has occurred and outputs the signal from pin 36 to switch off the power supply lines Releasing the protective circuit and restor ing power supply To release the protective circuit and restore power supply turn the power to t...

Page 12: ...r colours 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 Adjustment If part of the picture screen is coloured adjust the Deflection Yoke position for ward or backward slightly 8 Tighten the mounting screw of the Deflection Yoke Adjust Convergence next CENTRE ...

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