Mitsubishi Electric WD-52531, Service Manual, Page: 20 / 63

Page 20
MODEL: WD-52531 / WD-62531 / WD-62530
Lamp Control
Block Diagram
Lamp Troubleshooting
Flow Chart
• Install Lamp Cover with no Lamp
• Monitor Ballast spark gap.
• Press "POWER'
• Spark gap arc?
Press
"POWER"
KA Connector
(1~4)=3.3V?
(7~8)=18V?
Ballast
DC Supply?
Replace
Lamp
• H for 5 sec.
• L for 10 sec.
• H for 1 sec>
• Stays Low
PL (1 to 5)=340V
FB pin 3=5vs
Replace
Ballast
• H for 4 sec.
• L for 10 sec.
• Repeats
several times
Replace
Lamp
Install Lamp
& Lamp Cover
Check
Ballast
Striking
Replace
Lamp
Check
LAMP-EN
(FC pin 23)
Yes
No
Yes
Pulses
No
No Pulse
Pulses
Yes
Yes
Check
Engine
Power
Check
PWB-SIGNAL
OK
Lamp Lights
then goes out
Lamp does
not Light
Check Cable
Connections
DVI, FC &
CN101
Circuit
Problem
OK
OK
PB Connector
(1~2)=18V?
Replace
PWB-POWER
No
Check
PWBs Signal & Interface
Yes
Code 34
Code 34
Code 66
Code 66
Code 66
Code 66
Code
66
Code
66
Code 34
Code 34