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Thoubleshooting
No Front (SET) operation
REF+/-, +5V, -28V power
is supplied to FJP1?
12MHz oscillation (FY1)?
Reset working in
FIC1(Micom) 12pin?
soldering is OK?
Operational waveform is
in FIC3(FLT) pin ?
Keys of STOP, PLAY, OPEN
If the problem persists:
Check after replacing Front.
Check other parts for normal Front operation
5-4
Yes
Yes
Yes
FIC1(Micom)
Yes
missing
Yes
work normally?
Yes
No
Check power status
No
Check FXTAL peripheral circuit
No
Check reset peripheral circuit of FIC2
No
Check FIC1(Micom) soldering
No
Check FU1(Micom) peripheral circuit
Check S/W interface. Check
No
communication status with main Micom
Check FR pins 34,13,12,11,10,8
7,6,26
Samsung Electronics
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