Philips DVDR3320V/01 Service Manual page 21

VCR ELECTRICAL TROUBLESHOOTING GUIDE
No 28V (HSR)
NO
Is the Vcc(30V) supplied
to Q120 Collector?
YES
NO
Is the Vcc(30V) sup-
plied to Q120 Base?
YES
NO
Is the Vcc(33V) supplied
to Q121 Collector?
YES
Check or Replace
the Q120
Check or Replace
the D129
Check or Replace
the ZD153
Check the 'HSR "H"
signal from µ-com
Check or Replace the
Q121/Q122 & 33V line
3-7