Sony PFM42V1 Triage & Troubleshooting Manual page 33

YDT
Board
&
Drive
ICs
Ysus
Scan
Board
YDB
Board
&
Drive
ICs
XL address Board
YDT
Board
&
Drive
ICs
Ysus
Scan
Board
YDB
Board
&
Drive
ICs
XL address Board
PDP-04
1
between Ysus & YDT/YDB boards .
Check VS and 5V power supplies to
Zsus
Scan
Ysus board.
Board
Check for screen Priming
Replace G-board (Volatge (s) NG)
Replace Ysus (Priming NG)
Replace Control Board (Priming OK )
XR address Board
Control Board
Pixelization & Black Areas In Video
1
power supply voltages (VS & 5V) to
Zsus board are secure .
Zsus
Scan
Confirm Flex cable connections
Boar
d
between Zsus board and Panel .
XR address Board
No Video – Black Raster
st
– Check Flex cable connections
st
– Confirm connections and
FWD42PV1 Troubleshooting
nd
2 – Check connections rd
3
between Ysus and Control
connections to Zsus board .
boards are secure .
Connections & Voltages OK
Replace Zsus (connections &
A) Replace Ysus
voltages OK)
B) Replace Control board
nd
2 –
A) Replace Zsus board (all connections
and voltages OK )
B) Replace G-board (voltages NG)
C) Replace Plasma Panel (Flex cable NG)
– Check all voltages and
32