Philips DVP721VR - Page 15

3-5
NO 5VT.
Check or Replace
the D118
Is the Vcc(5.3V) sup-
plied to Q163 Emittor?
Check or Replace
the Q163
Is the Q164 Base
“H”?
NO
NO
Check the TIMER “H”
signal from µ-com
YES
YES
YES
No 3.3V. (TO DVD)
Check or Replace
the D111
Check the PWR CTL
H” signal from µ-com
Is there about 3.7V
at the IC152 pin1?
Is there about 3.3V~5V
at the IC154 pin4?
Check the IC152
Replace
NO
NO
YES
YES
YES
No 12VA (To Cap, Drum Motor )
Check or Replace
D110.
Is the Vcc(13V) sup-
plied to C123?
Is the D117/D115
Normal?
NO
Check the
D117/D115.
NO
YES
YES
Check or Replace
the Cap / Drum
YES
No REG 12VT
Check or Replace
the D110.
Is the Vcc(13V) supplied
to Q156 Collector?
Is the Vcc(13V) sup-
plied to Q156 Base?
NO
NO
Check the TIMER “H”
signal from µ-com
Check the 33V
Line
YES
YES
YES
Check or Replace
the Q156.
YES