Initialization Pulse Adjust; Printed Circuit Board) Exchange - Panasonic TH-50PZ850U Service Manual

8.1.2.

Initialization Pulse Adjust

1. Input the White signal to plasma video input.
2. Set the picture controls as follows.
Picture menu : Vivid
Normal : Set
Aspect : Full
3. Connect Oscilloscope to TPSC1 (SC).
Check the voltage (T2) at 100 us period on the down slop.
8.1.3. P.C.B. (Printed Circuit Board) exchange
8.1.3.1. Caution
1. To remove P.C.B. , wait 1 minute after power was off for discharge from electrolysis capacitors.
8.1.3.2. Quick adjustment after P.C.B. exchange
Adjust the following voltages with the multimeter.
P.C.B.
P Board Vsus
SC Board Vad
SS Board Ve
A, D Board White balance and Sub brightness for NTSC, PAL, HD, PC and 625i signals
*See the Panel label.
Caution:
Absolutely do not reduce Vsus below Ve not to damage the P.C.B.
Test point
T2 TPSC1 (SC)
Name Test Point
TPVSUS (SS)
TPVAD (SC)
TPVE (SS)
Volume
VR16602 (SC) 250 V ± 10 V
Voltage
Vsus ± 2V
-140V ± 1V
Ve ± 1V
27
Level
Volume
VR251 (P) *
VR16600 (SC)
VR16000 (SS) *
Remarks