Page 1
Samsung Electronics 5 Ð 1
5. Troubleshooting
When troubleshooting, make sure the disc is not dirty or warped.
Check all connection bettween VCD PCB and main PCB
Check all supply voltage (+8V,-8V,+5V,-5V)
5-1 No Video.(Video CD)
YES
YES
YES
YES
YES
YES
Check for C-Sync Signal
at pin 95 of VIC100
Check for waveform at
pin10 of VIC3
(Freg: 13.5MHz)
Check VIC3
or Replace
Check if waveform at pin 5,7.9
of VIC101 is varying when
playing VCD disc
NO
NO
NO
NO
NO
NO
Check VIC101 or
Replace
Check for video signal at
pin2 of NIC101
Check VIC4 or
Replace VIC4
Check for video signal at
pin7 of VIC5
Check VIC5
or Replace
Check VQ4,5
AND VCE23,24
Replace
Check Pattern or
SMD Type parts.
A
Page 2
Samsung Electronics
5 Ð 2
5-2 No digital sound(VCD1.1,VCD2.0,CD,LD DIGITAL)
YES
YES
YES
YES
Check for 16 MHz Clock waveform
at pin8 of VIC3
Check VCW1
Check for voltage at pin27 of
VIC105 is OV when power
is turned on
Check for signal at pin1,2,3
of AIC104
Check for audio signal at
pin13,16 of AIC104
B
Check VCW2
See “No Video”
Replace
NO
NO
NO
NO
Page 3
5 Ð 3Samsung Electronics
5-3 No analog audio(LD Analog)
YES
YES
Check for audio signal
at pin4,15 of VIC6
NO
NO
Replace
Check for audio signal
at pin5,7 of VCW4
B
Check Connection
between VCD and
MAIN PCB
Check Pattern
Check MAIN PCB
O.K
Page 4
Samsung Electronics
5 - 4
O
Check for audio sound with
STANDARD mode
X
See “No Sound”
O
Check for signal at
pin2,3,4 of AIC108
X
Check Connection between
VCD and MAIN PCB
Check AIC108 or Replace
5-4 Voice cansel and change does not work
Page 5
Samsung Electronics
5 - 5
YES
YES
YES
Check if signal at SW1,
SW2 of DCW1
(LOW OR HIGH)
Check CD Tray swich
Check pattern from
MIC1 to DRIC1 and
MICOM
Check for signal
pin5,6 of DRIC1
(PIN5:LOW,PIN6:HIGH)
Check for waveform at
pin2,10 of DRIC1
Check DRIC1
Check flate cable and
CD Tray Motor
NO
NO
NO
5-5 Disc change Does Not Work
¡¡
ÿ
CAUSION : You must connect a wire from Tray to unit. If not , unit will be troubled.
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