Toshiba 19DV550P Service Manual page 50

THE PICTURE DOES NOT
APPEAR
Does backlight shine?
Yes
Is CD7204 connected?
Yes
Is there voltage at pins 1,2
and 16 of CP7200 5V?
Yes
Is there signal at pins
5,6,7,8,10,11,12,13,14,
15,19,20,21,23,24,25,
26,28,29,30 of CP7200
No
Change MAIN PCB.
TROUBLESHOOTING GUIDE
No
Is CD7005,CD7006
connected ?
Is the signal pin 16
and18 of IC7001 ?
Is the voltage at pin
20 of IC7001 12V ?
No
Connected CD7204.
No
Check Q3810 and peripheral
circuit.
Yes
No
Yes
No
Yes
No
Yes
E-3
Connected CD7005,CD7006
Check IC7001 and
peripheral circuit.
Check F7001.
Change V7201(PANEL).
19DV550P/19DV551P