Troubleshooting; Led Display; Servicing Diagrams - Toshiba TLP-T50M Service Manual

1. TROUBLESHOOTING

SYMPTOM
Power is not on
Power off during use
Lamp is not on
No image
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.
SECTION 2

SERVICING DIAGRAMS

CHECK
Flat cable of Power supply
(disconnect PJ1)
PJ1(connect PJ1)

LED Display

Lamp
"No Signal" OSD message
Measurring terminals
TP-R
TP-G
TP-B
INSPECT
Standby voltage
(See page 2-2)
Standby voltage
Lighting pattern
Any damage inside
or not
Indicated or not
Waveform
2-1
RESULT
(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 or lamp
power supply.
There is a possibility that the
lamp may not show visible
damage, but may be still be
defective. Test with known good
lamp.
(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.