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12. Troubleshooting
Loading Emergency
DECK Housing close
YES
Is Loading normal? STOP
NO
IC401~5 (VS_D) NO
CHECK IC501 MICOM OUT
4.8V?
YES
IC401-25 (VCC1) NO
CHECK IC401
4.5V?
YES
Changing Loading Motor
Samsung Electronics 12-1
Troubleshooting
Drum Does Not Rotate
NO
IC401-16 3V? CHECK IC501 MICOM
YES
NO NO CHECK
IC401-60 is VS normal? Is DRUM error OUT normal?
R5108, R5107, C518, C519
YES
CHECK Q702, L717
IC401 is Drum U, V, W NO
CHECK IC401
Waveform
YES
Changing Drum Motor
12-2 Samsung Electronics
Troubleshooting
Capstan Does Not Rotate
NO
IC401-2 3V? CHECK IC501 MICOM
YES
NO Is CAPSTAN error OUT NO CHECK
IC401-44 is VS
normal? normal? IC501-ALL CAP PWM
YES
CHECK Q701, L719
IC401 is CAP U,V,W NO
CHECK IC401
normal?
YES
Changing CAP MOTOR
Samsung Electronics 12-3
Troubleshooting
VIDEO MISSING
IN DVC CAMERA
CHECK COLOR BAR NO
WHEN 12CH DATA CHANGE CHANGE DSP6 (ICM01)
to 01H in Camera Control
MODE
YES
CP14 is CCD OUT NO
CHANGE CAMERA
normal?
YES
IC301-1, 19 NO REPAIR IC201 AND THE
is Y, C signal
AROUND THE CIRCUIT
normal?
YES
IC301-9, 14 NO
is Y, C signal REPAIR IC301
normal?
YES
CHECK FFC VCR MAIN NO
CHANGE THE FFC
TO JACK BOARD
YES
Is VIDEO in/out NO CHANGE THE VIDEO
Terminal normal? in/out JACK
YES
END OF REPAIR
12-4 Samsung Electronics
Troubleshooting
VIDEO MISSING
IN PLAY MODE
NO
Q111 is Envelop CHECK THE HEAD OF DRUM
signal normal?
YES
IC301-1, 19 Is Circuit
NO NO REPAIR THE
is Y,C signal around IC101,
normal? IC201 normal? IC101, IC201
YES YES
Repair the IC501 (MICOM)
IC301-9, 14 NO
Is Y,C signal
normal?
REPAIR THE IC301
YES
Is FFC VCR MAIN NO
to JACK board CHANGE THE FFC
normal?
YES
Is Video in/out NO CHANGE THE VIDEO
Terminal normal? IN/OUT JACK
YES
END OF REPAIR
Samsung Electronics 12-5
Troubleshooting
NO POWER
NO
IN FUSE (FUSE23, FUSE67) REPLACE FUSE
NORMAL?
YES
NO CHECK THE CIRCUITRY
IC701-28~31 3V? AROUND THE MICOM
YES
Q701~Q708-4,5
NO CHECK L704, L706, L708, L710,
is the output vlotage output
when power is L712, L714, L717, L719
supplied?
YES
Q701~Q708-2 NO
is the output vlotage output CHECK L701, L702
when power is
supplied?
YES
Q701~Q708-1 NO
is the output vlotage output CHANGE TR
when power is
supplied?
YES
REPLACE IC701
12-6 Samsung Electronics
Troubleshooting
NO AUDIO OUTPUT
CHECK MIC CELL
AND HARNESS
YES
NO CHECK THE CONSTANT AND
IC601 is input normal?
WRONG SOLDERING
YES
NO CHECK THE CONSTANT AND
IC601 is output normal?
WRONG SOLDERING
YES
Is Speak Connector, NO REPAIR THE CONNECTOR,
FPC, Harness normal? FPC, HARNESS
YES
NO CHECK THE CONSTANT,
IC201 is AUDIO VCO
Normal? WRONG SOLDERING AND POWER
YES
CHECK AUDIO POWER
(L601, L602, L603, L604)
Samsung Electronics 12-7
Troubleshooting
MEMO
12-8 Samsung Electronics