Panasonic TC-54PS14 Service Manual - Page 26

Initialization Pulse Adjust, P.C.B. Printed Circuit Board exchange, 1.3.1., Caution, 1.3.2., Quick

Page 26 highlights

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 100μs period on the down slop. Test point T2 TPSC1 (SC) Volume VR16601 (SC) Level 250 V ± 10 V 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 SC Board A Board Name Test Point Voltage Volume Vsus TPVSUS (SS) Vsus ± 2V VR251 (P) * Vad TPVAD (SC) - 175V ± 2V VR16600 (SC) 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. Remarks 26

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26
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
μ
s 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.
*See the Panel label.
Caution:
Absolutely do not reduce Vsus below Ve not to damage the P.C.B.
Test point
Volume
Level
T2
TPSC1 (SC)
VR16601 (SC)
250 V ± 10 V
P.C.B.
Name
Test Point
Voltage
Volume
Remarks
P Board
Vsus
TPVSUS (SS)
Vsus ± 2V
VR251 (P)
*
SC Board
Vad
TPVAD (SC)
- 175V ± 2V
VR16600 (SC)
A Board
White balance and Sub brightness for NTSC, PAL, HD, PC and 625i signals