Toshiba TLP-T50 User manual

2-1
SECTION 2
SERVICING DIAGRAMS
1. TROUBLESHOOTING
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.
SYMPTOM
Power is not on
Power off during use
Lamp is not on
No image
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
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.

2-2
2. LED DISPLAY (Problems Shown on LED Indicator Combination)
TEMP
(OFF)
(OFF)
(OFF)
(OFF)
(Orange)
(RED)
(OFF)
(OFF)
(OFF)
(OFF)
(RED)
LAMP
(OFF)
(RED)
(RED
flashing)
(Orange
flashing)
(OFF)
(OFF)
(OFF)
(OFF)
(OFF)
(OFF)
(OFF)
ON
(OFF)
(RED)
(RED)
(RED)
(RED)
(RED)
(RED)
(RED)
(RED)
(RED)
(RED)
Cause and Trouble
Standby-power is not on
> There's a problem with
the power unit or
system microcomputer.
The lamp went out
during use or the lamp
will not switch on
> The bulb has reached the
end of it's life.
The power turns off
> Trouble with the Lamp
cover
The power turns off or
does not come on
> The inside is too hot, or
the projector has been
working in an area of
high temperature.
Error Cord
04: Near the Lamp housing
05: Near the Intake fan
The power turns off or
does not come on
> Trouble with the cooling
fans.
Error Cord
06: Fan (PJ352) PBS
07: Fan (PJ353) Intake
1 (B)
08: Fan (PJ354) Exhaust
11: Fan (PJ355) Intake
2 (RG)
The power turn off or
does not come on
> There's a problem with
the sensor PC board or
main PC board.
Solution
Check the power unit.
Check the connector.
Check the main PC board.
Change new lamp.
There may also be trouble in
ballast power supply.
The lamp cover is not properly
attached. Unplug the power cord
and reattach the lamp cover.
Place the projector correctly
so the intake and exhaust
fan's holes are not covered.
Turn the projector off, and
leave it for a while, and turn
it on again.
Clean the air filter.
Check the each cooling fan.
Check the sensor PC board.
Check the main PC board.
Check the connector (PJ001,
PJ201)
Status of Indicator Light
FAN
(OFF)
(OFF)
(GREEN)
(OFF)
(GREEN)
(GREEN)
(Orange)
(RED)
(Orange
flashing)
(RED
flashing)
(RED)
00
01
02
03
04
05
06
07
08
09
10
NOTE
In each mode shown with this color, the projector returns to the standby mode after error indication for about
2 minutes.
Error
Cord
No.