Service Manual
Page 2
... no possibility of the picture tube or high voltage circuitry and;also, under certain conditions, may produce radiation in current solid state TV receivers is regulating correctly. 5. The chassis in the glass material. It is essential that it is the picture tube. Disconnect AC...that Xradiation is to locate the cause of the picture tube including the lead in this receiver employs integral implosion protection. 2. 20LK31M 20LK61M IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be checked periodically. 3. To prevent electrical shock use a picture tube other ...
... no possibility of the picture tube or high voltage circuitry and;also, under certain conditions, may produce radiation in current solid state TV receivers is regulating correctly. 5. The chassis in the glass material. It is essential that it is the picture tube. Disconnect AC...that Xradiation is to locate the cause of the picture tube including the lead in this receiver employs integral implosion protection. 2. 20LK31M 20LK61M IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be checked periodically. 3. To prevent electrical shock use a picture tube other ...
Service Manual
Page 4
...VOLUME UP/DOWN (+) Increases sound. (-) Decreases sound. • In menu mode, changes or selects the TV adjustments. 20LK31M 20LK61M LOCATION OF USER'S CONTROL Front Panel 20LK31M LK 20LK61M LK VIDEO/AUDIOIN TERMINALS VIDEO/AUDIOIN TERMINALS POWER Press → On. Press again → Off. Press... again → Off. FLASHBACK Returns to external video input mode. TV Infrared Transmitter Window INPUT Press → ...
...VOLUME UP/DOWN (+) Increases sound. (-) Decreases sound. • In menu mode, changes or selects the TV adjustments. 20LK31M 20LK61M LOCATION OF USER'S CONTROL Front Panel 20LK31M LK 20LK61M LK VIDEO/AUDIOIN TERMINALS VIDEO/AUDIOIN TERMINALS POWER Press → On. Press again → Off. Press... again → Off. FLASHBACK Returns to external video input mode. TV Infrared Transmitter Window INPUT Press → ...
Service Manual
Page 5
...tuned in step 5, the circuit must be obtained, check circuitry for normal picture and sound. 3. Apply 120V AC using an external DC supply, TV must be as specified checks should be on PWB-A, wired into one side of the horizontal oscillator does not stop in test signal. 3. Now make... verify that the voltmeter reads 21.3 ±1.5V. 5. Allow for warm up and adjust all customer controls for malfunctioning components. 20LK31M 20LK61M Note: INSTALLATION AND SERVICE INSTRUCTIONS (1) When performing any adjustments to resistor controls and transformers use non-metallic screwdrivers or...
...tuned in step 5, the circuit must be obtained, check circuitry for normal picture and sound. 3. Apply 120V AC using an external DC supply, TV must be as specified checks should be on PWB-A, wired into one side of the horizontal oscillator does not stop in test signal. 3. Now make... verify that the voltmeter reads 21.3 ±1.5V. 5. Allow for warm up and adjust all customer controls for malfunctioning components. 20LK31M 20LK61M Note: INSTALLATION AND SERVICE INSTRUCTIONS (1) When performing any adjustments to resistor controls and transformers use non-metallic screwdrivers or...
Service Manual
Page 6
Follow the steps below whenever the service adjusment is switched on and enters the service mode. Now, the TV set is required. Service number selection. Press CH UP/DOWN button to select the adjustment item and VOL UP/DOWN to adjust the data number ... RETURN PREVIOUS Figure A: Adjustment Categories Press CH UP/DOWN button for each categories. (OSD disturbance can be erased by VOL UP or VOL DOWN. 20LK31M 20LK61M For adjustments of this series such as window 1. While pressing the Vol-up and Ch-up buttons at the sametime, plug the AC cord into...
Follow the steps below whenever the service adjusment is switched on and enters the service mode. Now, the TV set is required. Service number selection. Press CH UP/DOWN button to select the adjustment item and VOL UP/DOWN to adjust the data number ... RETURN PREVIOUS Figure A: Adjustment Categories Press CH UP/DOWN button for each categories. (OSD disturbance can be erased by VOL UP or VOL DOWN. 20LK31M 20LK61M For adjustments of this series such as window 1. While pressing the Vol-up and Ch-up buttons at the sametime, plug the AC cord into...
Service Manual
Page 7
... 04 0C 00 0F 01 07 SERVICE POSITION F14 F15 F16 F17 F18 F19 F20 F21 F22 F23 F24 F25 F26 ADJUST ITEM OSD CONT SHARPNESS FLT SYS KILLER OP PRE SHOOT CORING DC REST BS START BS GAIN ABL START R/B ANGLE H BLK R H BLK L RANGE 00-03 00-3F 00-07... 00 08 03 06 Holding down both the Vol-up /Ch-down buttons on the TV set in the service mode for more than 2 seconds will automatically write the above initial values into IC2101. Table - 20LK31M 20LK61M Below are the ranges and initial values for each adjustment and in IC2101. Holding down...
... 04 0C 00 0F 01 07 SERVICE POSITION F14 F15 F16 F17 F18 F19 F20 F21 F22 F23 F24 F25 F26 ADJUST ITEM OSD CONT SHARPNESS FLT SYS KILLER OP PRE SHOOT CORING DC REST BS START BS GAIN ABL START R/B ANGLE H BLK R H BLK L RANGE 00-03 00-3F 00-07... 00 08 03 06 Holding down both the Vol-up /Ch-down buttons on the TV set in the service mode for more than 2 seconds will automatically write the above initial values into IC2101. Table - 20LK31M 20LK61M Below are the ranges and initial values for each adjustment and in IC2101. Holding down...
Service Manual
Page 8
...good local channel. 2. Make sure the customer color control is set to oscilloscope probe between TP855 and ground of it's range. 3. Video Level (TV Det Video Level) Adjustment 1. Receive a good local channel. 2. Receive a good local channel. 2. Connect to center position. 3. Select the service...sure the customer brightness control is set the data value to "01" to obtain normal color level. 9. Select another channel. 20LK31M 20LK61M Ë SERVICE ADJUSTMENT RF AGC Adjustment 1. Select the service adjustment "S12" and reset data to turn off the luminance signal (Y-...
...good local channel. 2. Make sure the customer color control is set to oscilloscope probe between TP855 and ground of it's range. 3. Video Level (TV Det Video Level) Adjustment 1. Receive a good local channel. 2. Receive a good local channel. 2. Connect to center position. 3. Select the service...sure the customer brightness control is set the data value to "01" to obtain normal color level. 9. Select another channel. 20LK31M 20LK61M Ë SERVICE ADJUSTMENT RF AGC Adjustment 1. Select the service adjustment "S12" and reset data to turn off the luminance signal (Y-...