Sony PFM42V1 Triage & Troubleshooting Manual page 42

Address
Board
YDT
Board
&
Drive
ICs
Ysus
Scan
Board
YDB
Board
&
Drive
ICs
Address
Board
Address
Board
YDT
Board
&
Drive
ICs
Ysus
Scan
Board
YDB
Board
&
Drive
ICs
Address
Board
PDP-04
Address Address Address
Board Board Board
Xsus
Scan
Board
Address Address Address
Board Board Board
Control Board
Address Address Address
Board Board Board
Xsus
Scan
Board
Address Address Address
Board Board Board
No Video – Black Raster
st
1 – Check Flex cable connections
between Ysus & YDT/YDB boards .
Check VS and 5V power supplies to
Ysus board .
Check for screen Priming
Replace G-board (Volatge(s) NG)
Replace Ysus (Priming NG)
Replace Control /XL Board (Priming
OK )
Pixelization & Black Areas In Video
st
1 – Confirm connections and
power supply voltages (VS & 5V) to
Zsus board are secure .
Confirm Flex cable connections
between Zsus board and Panel .
FWD50PX1 Troubleshooting
nd
2 – Check connections rd
3 – Check all voltages and
between Ysus and Control
connections to Xsus board .
boards are secure .
Connections & Voltages OK
Replace Xsus (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)
41