Service manual

Page 18
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825
V. PWB Level Troubleshooting
Use the Symptom/Cause information below to aid troubleshooting to the PCB level. While this method will not be
100% accurate, checking all items listed in the Symptom column will increase the probability of a successful
diagnosis. Symptoms can also be caused by poor or mis-seated connections beween the related PWB’s.
Symptom Most Likely Other Possibility
Video Problems. All signals bad
except PC Input is OK
PWB-DM
PWB-Terminal-1 or 2
PWB-FMT
Video Problems, all Inputs & Menu
bad. Audio OK
PWB-FMT
Analog Tuning problems. External
Inputs & Di
g
ital OK
PWB-SIGNAL PWB-TERMINAL-2
Analog Tuning & External Inputs
Problems. Di
g
ital OK
PWB-FMT
Digital Tuning problems. Analog OK PWB-SIGNAL PWB-DM
Analog & Digital Tuning Problems.
External Inputs OK
PWB-SIGNAL
External Input Problems. Tuning
OK
PWB-TERMINAL-1 PWB-TERMINAL-2
No S
y
nc PWB-FMT
Digital noise, lines or artifacts in
picture
PWB-FMT Optical Engine
Card Reader Problems Memor
y
Card Reader PWB-DM
1394 Problems PWB-DM
Audio Problems. Speakers, Monitor
A/V 1 & Audio 2 Bad
PWB-SIGNAL
Audio Problems. Speakers, Monitor
A/V 1 Bad. Audio 2 Good
PWB-DM PWB-SIGNAL
Audio Problems. Speakers Bad.
Monitor A/V 1 & Audio 2 Good
PWB-SIGNAL
PWB-SPEAKER<L><R>
PWB-DM
Power LED blinking constantly.
Won't power on.
PWB-DM
Control problems PWB-DM
Control problems
(
Front Panel
)
PWB-Control
Control problems (Remote) Remote or PWB-Preamp
PWB-Preamp connectors
reversed.
IR Output problems, both
j
acks PWB-TERMINAL-2 PWB-DM
No Power. Status LED Red. Error
Code 41
PWB-POWER
DVI connection between
Chassis & En
g
ine