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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.
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Summary of Contents for Toshiba TLP-T50
- Page 1 SECTION 2 SERVICING DIAGRAMS 1. TROUBLESHOOTING SYMPTOM CHECK INSPECT RESULT (NG) → Power supply is NG. Flat cable of Power supply Standby voltage (disconnect PJ1) (See page 2-2) (OK) → Check next step. Power is not on (NG) → Main PCB is NG, PJ1(connect PJ1) Standby voltage or any cable connection is NG.
- Page 2 2. LED DISPLAY (Problems Shown on LED Indicator Combination) Status of Indicator Light Error Cord Cause and Trouble Solution TEMP LAMP Standby-power is not on Check the power unit. > There's a problem with (OFF) (OFF) (OFF) (OFF) Check the connector. the power unit or system microcomputer.