Panasonic TC-21Z88RB - Page 7

Item / Preparation Adjustment Procedure
+B Voltage Confirm the DC voltage at the indicated test points,
as
:
1.
Operate the TV set.
TPA 12 : 140.5 ± 1.5V
2.
Set control as follows :
TPA 11 : 8 ± 1V
Brightness ........... minimum
TPA 10 : 5 ± 1V
Contrast .............. minimum TPA 21 : 215 ± 15V
RF AGC
1.
Receive a colour bar signal at an RF
level of 69 +1-2 dBU with 75 loaded.
1.
Select “RF AGC” indication in CHK2, on Screen
by
control at factory mode.
2.
Connect digital multimeter to RF
AGC at Tuner.
2.
Set RF AGC by using remote control Volume (+)
or
(-) button until voltage AGC at Tuner reaches 2.6 ±
0.1V
TPA 15 (Tuner point).
3.
Increase RF signal strength by 2dB, confirm AGC
at
voltage drop.
High Voltage
1.
Receive the crosshatch pattern.
1.
Connect a DC voltage meter to TPA 12 and
confirm
voltage is 140.5 ± 1.5V.
2.
Set to 0 Beam.
Screen VR .......... minimum
2.
Connect a high frequency voltmeter to heater and
confirm
that voltage reads 6.0 ± 0.24 (VRMS).
Contrast .............. minimum
3.
Normalize the brightness and contrast.
Item / Preparation Adjustment Procedure
NTSC TINT COLOUR
Connect a short jumper between TPA
10 and TPA 20.
Press Main Menu and set system to
use AV-NTSC (3.58 MHz).
DYNAMIC ................. Normal
Channel CLR Set ..... STD
1.
Adjust Sub-Tint so that No. 2, 3 and 4 becomes
level
waveform is similar to Fig. 3.
2.
Confirm phase at Tint is changes more than ± 30
by
control.
3.
Confirm that colour level is maximum when
colour
adjusted to maximum position.
Note: Use remote control only when adjusting
user
Sub-Tint.
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