Adjustment Procedure
Item / Preparation
Adjustment Procedure
+B Voltage
1. Operate the TV set.
Confirm the DC voltage at the indicated test points,
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. 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.
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.
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
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.
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