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Service Hints.
Service Position for E-Board
1. Remote the back cover.
2. Stand the TV set as shown in fig. 7.
3. Remove the A-Board from the TV set by pulling the main board out as shown in figure 7.
2. Stand the TV set as shown in fig. 7.
3. Remove the A-Board from the TV set by pulling the main board out as shown in figure 7.
Fig.7
Factory mode adjustment :
How To Set : To set the Factory mode, press Volume 0 dac on the TV and Timer Setting 30min
on the remote control and press Volume (-) Down button on the TV together press
recall on the remote control.
CHK should appear on right of TV screen.
To move from CHK1 to CHK2 mode, etc, please follow below rotation :
recall on the remote control.
CHK should appear on right of TV screen.
To move from CHK1 to CHK2 mode, etc, please follow below rotation :
To Set Self-Check : Press the volume down button on TV than press the off timer button on
remote control.
Pull out this way
Adjustment for White Balance
Preparation :
1. Receive the white balance pattern and aging should have been performed over 30 minutes.
2. Set the picture menu to to DYNAMIC NORMAL.
3. Degause the CRT face.
4. Fix the CRT colour analyzer receiver unit to CRT face.
1. Receive the white balance pattern and aging should have been performed over 30 minutes.
2. Set the picture menu to to DYNAMIC NORMAL.
3. Degause the CRT face.
4. Fix the CRT colour analyzer receiver unit to CRT face.
Adjustment of Low Light.
1. Adjustment Sub Bright, so that Y = 6.3 +- 1.0nit.
2. Adjust R-CUT OFF, so that X = 0.235 +- 0.01nit.
3. Adjust G-CUT OFF, so that y = 0.235 +- 0.01nit.
2. Adjust R-CUT OFF, so that X = 0.235 +- 0.01nit.
3. Adjust G-CUT OFF, so that y = 0.235 +- 0.01nit.
Adjustment of High Light.
1. Adjust Sub Bright, so that Y = 270 nit.
2. Adjust R-Drive, so that X = 0.265 +- 0.01nit.
3. Adjust B-Drive, so that y = 0.265 +- 0.01nit.
2. Adjust R-Drive, so that X = 0.265 +- 0.01nit.
3. Adjust B-Drive, so that y = 0.265 +- 0.01nit.
Adjustment for CRT CUT OFF.
Preparation :
1. Connect ocilloscope probe to TPL7.
2. Screen VR min.
3. Set the data Sub Bright , Bright.
4. In service Mode at ‘Bright’ dac press [5] in factory mode to enter vertical line and adjust by
volume down or up button.
5. Adjust “Screen VR” until 1-H Line appears.
1. Connect ocilloscope probe to TPL7.
2. Screen VR min.
3. Set the data Sub Bright , Bright.
4. In service Mode at ‘Bright’ dac press [5] in factory mode to enter vertical line and adjust by
volume down or up button.
5. Adjust “Screen VR” until 1-H Line appears.
130V
0V
Adjustment Procedure
Item / Preparation
Adjustment Procedure
+B Voltage
1. Operate the TV set.
Confirm the DC voltage at the indicated test points,
as follow :
as follow :
2. Set control as follow :
TPA 12 : 141.2 +- 0.8V
TPA 21 : 215 +- 15V
Brightness ..... minimum
TPA 11 : 8 +- 1V
Contrast ........ minimum
TPA 10 : 5 +- 1V
RF AGC
1. Receive a colour bar signal at an
1. Select “RF AGC” indication in CHK 2, on Screen
RF level of 64(+0-1)dBU with 75
by remote control at factory mode.
loaded.
2. Connect digital multimeter to RF AGC
2. Connect digital multimeter to RF AGC
2. Set RF AGC by using remote control volume (+)
at Tuner.
or volume (-) button until voltage AGC at Tuner
reach 2.7 +- 0.1V.
3. Increase RF signal strenght by 2dB, confirm
AGC at Tuner voltage drop.
reach 2.7 +- 0.1V.
3. Increase RF signal strenght by 2dB, confirm
AGC at Tuner voltage drop.
High Voltage
1. Receive the crosshatch pattern.
1. Connect a DC voltage meter to TPA 12
and confirm the +B voltage is 141.2 +- 0.8V.
and confirm the +B voltage is 141.2 +- 0.8V.
2. Set to 0 Beam .
2. Connect a high frequency voltmeter to heater and
Screen VR ..... minimum
confirm that voltage reads 6.3+- 0.24 (VRMS).
Contrast ....... minimum
3. Normalize the brightness and contrast.
Item / Preparation
Adjustment Produre
Connect oscilloscope probe to TPA32
(R-OUT) with 10Kohm series resistor.
Connect a short jumper between TPA 10
(R-OUT) with 10Kohm series resistor.
Connect a short jumper between TPA 10
1. Adjust Sub-Tint so that No.2,3 and 4 becomes
and TPA 20.
level waveform is similiar to Fig. 10.
Press Main Menu and Set system to
2. Confirm phase at Tint is changes more than
Use AV-NTSC (3.58MHz).
+/- 30 by Tint control.
DYNAMIC ....... Normal
3. Confirm that colour level is maximum when
colour DAC is adjusted to maximum position.
colour DAC is adjusted to maximum position.
Note:Use Remote control only when adjusting user mode
to Sub-Tint.
0.5a
a
7 8 9 10
1 2 3 4 5 6
Fig. 10
Ω
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