SECTION 2
SERVICING DIAGRAMS
1. TROUBLE SHOOTING
2-1
CAUSE
Power is not on
Power off during use
Lamp is not on
No image
CHECK POINT
Flat cable of Power supply
(disconnect PJ701)
PJ701(connect PJ701)
LED Display
Lamp
"No Signal" OSD message
Test Point
TP-R
TP-G
TP-B
CHEK ITEM
Standby voltage
(See page 2-4)
Standby voltage
Lighting pattern
Any damage inside
or not
Indicated or not
Signal shape
JUDGE
(NG)
→
Power supply is NG.
(OK)
→
Check next step.
(NG)
→
Main PCB is NG,
or any cable connection is NG.
See 2-2
(Damaged)
→
Change with new lamp.
(Not Damaged)
→
Check Lamp cover, PJ11 or
lamp power supply.
However, even if the lamp has
no damage, there is the case it
has trouble also.
(Indicated)
→
RGB/Video terminal is NG,
or Main PCB is NG.
(Not Indicated)
→
Check next step.
(Correct)
→
LCD panel is NG,
or PJ851/PJ901/PJ951 is NG.
(Incorrect)
→
Main PCB is NG.
ATTENTION
LED displays various error pattern. (See 2-2)
Be careful because the same error occurs in the bad contact of the cable as well.
LED error combination display always show the latest error.
