Sony PFM42V1 Triage & Troubleshooting Manual page 49

YDT
Board
&
Drive
ICs
Ysus
Scan
Board
YDB
Board
&
Drive
ICs
XL address Brd
YDT
Board
&
Drive
ICs
Ysus
Scan
Board
YDB
Board
&
Drive
ICs
XL address Brd
YDT
Board
&
Drive
ICs
Ysus
Scan
Board
YDB
Board
&
Drive
ICs
XL address Brd
PDP-04
Zsus
Scan
Board
XC address Brd XR address Brd
Zsus
Scan
Board
XC address Brd XR address Brd
Zsus
Scan
Board
XC address Brd XR address Brd
No Video (Vertical Black Bar) 1/3 of screen
st
1 – Confirm secure connections
between XR and Control Boards .
Note: This same symptom can occur due to a defective XC board .
Follow the same step listed above for the XL -board to troubleshoot a
possible defective XC board .
Single Vertical Black Line (right side of screen )
st nd
1 – Confirm secure 2 – Check the drive ICs on
connections between XR and the flex cables between the XR
Control Board . and Panel for physical damage .
Replace Panel Assembly for
defective flex cable ICs
Single Vertical Black Line (left side of screen )
st nd
1 – Confirm secure 2 – Check the drive ICs on
connections between XL and the flex cables between the XL
Control Board . and Panel for physical damage .
Replace Panel Assembly for
defective flex cable ICs
NOTE: This same type of symptom can occur due to a defective
XC board . The single black line will occur in the center of the
screen above the XC board .
FWD50PX2 Troubleshooting
nd rd
2 – Confirm 5V and VA 3 – Replace boards in the
voltages to XR board. following order .
A) Replace XR-Board
B) Replace Control Board
rd
3 – Replace XR board
rd
3 – Replace XL board
48