TROUBLESHOOTING GUIDE

THE PICTURE DOES NOT

APPEAR

Does backlight shine?

No

Is CD7005 connected ? No

Connected CD7005

Yes

Yes

Is the signal pin 16 and 18 of IC7001 ?

Yes

Is the voltage at pin 20 of IC7001 12V ?

Yes

No

No

Check IC7001 and peripheral circuit.

Check F7001.

Is CD2804 connected?

Yes

No

Connected CD2804.

No

Is there voltage at pins 1,2,3 and 16,17 of CP2804 5V?

Yes

Is there signal at pins

7,9,10,12,13,22,23,25,26 Yes and 28 of CP2804?

No

Change DIGITAL PCB.

Check Q3009 and peripheral circuit.

Change V2801(PANEL).

E-3

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Image 53
Toshiba 15LV505 service manual Picture does not Appear