Video Level Adjustment - Panasonic TC-17LA1 Service Manual

TC-17LA1 / TC-20LA1
8.4.

Video level adjustment

Test Point Location
8.4.1. NTSC picture RF
Remote control transmitter
RF signal
Oscilloscope
· · · · Receive 75% color bar signal
· · · · Enter the adjustment mode and adjust the amplitude level of each signal in the following steps.
1. Y signal
With [VOLUME+/-] buttons of the remote control transmitter, adjust the value appearing below YGAIN indication so that the
value below MAX indication becomes B8.
2. B-Y signal (TP238)
With [VOLUME+/-] buttons of the remote control transmitter, adjust the value appearing below B-Y indication so that the
amplitude (white-blue) at TP238 becomes 0±0.03V.
3. R-Y signal (TP236)
With [VOLUME+/-] buttons of the remote control transmitter, adjust the value appearing below R-Y indication so that the
amplitude (white-red) at TP236 becomes 0±0.03V.
Measuring instrument
TP236~TP239 (GND) :R
TP237~TP239 (GND) :G
TP238~TP239 (GND) :B
Connection
ASPECT : 4:3
PIC MODE : STANDARD
BACK LIGHT: +30
AI PICTURE : OFF
20
Mode