Mitsubishi WD-57833 Service Manual page 30

MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657
WD-Y577 / WD-Y657 / WD-57833 / WD-65833 / WD-73833
Lamp Troubleshooting Flow Chart
• Install Lamp Cover with no Lamp
• Override Lamp Switch
• Monitor Ballast spark gap.
• Press "POWER'
• Spark gap arc?
Code 66
Code 66
Yes
Ballast
DC Supply?
Yes
PL (1to5)=340V
FB pin 3=5vs
No
Check
PWB-POWER
PE Connector
ENG-PWR
Pins 1 & 2=12V
(PD-17)
Code 66
Code 66
Replace
PWB-MAIN
Lamp Lights
then goes out
Lamp does
not Light
Check
Ballast
Striking
Yes
Replace
Lamp
• H for 5 sec.
• L for 10 sec.
• H for 1 sec>
• Stays Low
Code 57
Code 57
Replace
Ballast
Check
Engine
Power
Check Path
Open
DVI pin 20
Q7A03/Q7A05
FB pin 4
Page 30
Replace
Lamp
Code 34
Code 34
Check Cable
No
Connections
DVI, FB & CJ1
Press
"POWER"
Check
Pulses
Pulses
LAMP-EN
(FB pin 4)
No Pulse
Code 66
Code 66
NG
Check
PWB-POWER
Code 61
Code 61
OK
OK
OK
Circuit
Problem
Install Lamp
& Lamp Cover
• H for 4 sec.
• L for 10 sec.
• Repeats
several times
Yes
Replace
Lamp
Replace
Engine