Philips DVP721VR - Page 16

3-6
No 8V (TO DVD)
Is there about 13V
at the IC151 pin1?
YES
Is there about 3.3V~5V
at the IC151 pin4?
YES
Check the IC151
and Replace.
YES
Check or Replace
the D110.
NO
NO
Check the PWR CTL“H”
signal from µ-com
No 24V
Is the Vcc(24V) supplied
to Q153 Emitter?
YES
Is the Q154 Base
‘H’?
YES
Check or Replace
the Q153.
YES
Check or Replace
the D106.
NO
NO
Check the PWR CTL“H”
signal from µ-com
No 33VT
Is the Vcc(33V) supplied
to Q161 Emitter?
YES
Is the Q173 Base
‘H’?
YES
Check or Replace
the Q161.
YES
Check or Replace
the D113.
NO
NO
Check the TIMER CTL“H”
signal from µ-com