Service manual

TROUBLESHOOTING GUIDE
THE PICTURE DOES NOT
APPEAR
Does backlight shine?
Is CD2801 connected?
Connect CD2801
Is CP7001 and
CP7002 connected?
Connect CP7001 and
CP7002.
Yes
No
No No
Yes
Is the voltage at pins
13, 15 of IC7001 8.3V?
Yes
No
Check IC7001 and
peripheral circuit.
E-3
Is there signal at pins 7,
9, 10, 12, 13, 22, 23, 25,
26 and 28 of CP2804?
Change V2801(PANEL).
Change DIGITAL PCB.
No
Yes
Yes
Yes
No
Check Q3008 and peripheral
circuit.
Is there voltage at pins
1, 2, 3, 16 and 17 of
CP2804 5V?
E-3