Toshiba TLP-T50 Manual de usuario

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)

(Orange)

(RED)

(OFF)

(RED)

LAMP

(OFF)

(RED)

(RED

flashing)

(Orange

flashing)

(OFF)

(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)

(GREEN)

(OFF)

(GREEN)

(Orange)

(RED)

(Orange

flashing)

(RED

flashing)

(RED)

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.

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