10
TROUBLE SHOOTING GUIDE
C. SERVO/SYSCON CIRCUIT
C-1. FRONT KEYS
C-2. PICTURE IN PB MODE
Front keys do not operate
correctly
YES
Is +5.1V supplied to pin18
of IC501?
NO
Check power module
YES
Is +5.1V supplied to the
emitter of Q502?
NO
Check u-com, JP053 and
JP059
YES
Is +5.1V input at pin41 of
IC501?
NO
Check Q502 and circuit
YES
Check IC501
PB picture is not good
NO
Adjust tracking
YES
Noise appears although
adjusting tracking?
NO
Noise appears although
Change cassette tape
YES
Check and re-adiust the
path of DECK
YES
Is CTL pulse output at
pin1 of IC505?
NO
AC HEAD's height is
normal and there is not
dust?
NO
Adjust the head height
and remove dust
YES
YES
YES
Is CTL pulse input at
pin29 of IC501?
NO
Check C556, C533 and
D505
Check IC505 and adjacent
circuit
YES
The voltage of IC501's
pin18 is not changing?
NO
Check power module
YES
Check IC501
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Summary of Contents for DV-S103A Series
Page 33: ...32 PRINTED CIRCUIT BOARD 1 PCB MAIN All manuals and user guides at all guides com...
Page 34: ...33 PRINTED CIRCUIT BOARD 2 PCB POWER SMPS All manuals and user guides at all guides com...
Page 40: ...39 EXPLODING VIEWS PARTS LIST 1 PACKING AS All manuals and user guides at all guides com...