Philips DVP721VR Service Manual page 100

MECHANISM TROUBLESHOOTING GUIDE
C.
Auto Stop operates.
(PLAY/CUE/REV)
Does the pinch roller attached to
the Capstan shaft turn in opera-
tion of the Play/Cue/Rev.
YES
Does the T/UP or the supply
reel pulse occur?
YES
Check the Syscon, µ-com.
D.
No cassette loading is done.
Insert the cassette.
YES
Is operation of the lever
assembly S/W normal?
YES
Does output of the CST IN S/W
change?
(In insertion of the REC tape:
"L"_"H"_ "L")
(In insertion of the REC preven-
tion tape:
"L"_ "H"_ "L"_ "H")
YES
Check the Syscon circuit.
Check the assembly mode.
Check the spring pinch.
Is output of the DFG, DPG
normal?
NO
YES
NO
Check the Servo, Syscon.
Replace the reel sensor.
NO
Check the holder assembly CST.
NO
Is the CST IN S/W normal?
YES
NO
Check the Syscon circuit.
NO
Replace the drum motor.
NO
Replace the CST IN S/W.
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