Samsung DV4620V, DV5620 Troubleshooting

Samsung Electronics 6 Ð 1

6. 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)

6-1 No Video.(Video CD)

YES

YES

YES

YES

YES

YES

Check for C-Sync Signal

at pin 7 of MIC1

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 MIC1

Check MIC1 or
Replace

Check for video signal at

pin7 of VIC11

Check VIC11
or Replace

Check VQ4,6

and VCE23,24

Replace

Check Pattern or
SMD Type parts.

A

Samsung Electronics

6 Ð 2

6-2 No digital sound(VCD1.1,VCD2.0,CD,LD DIGITAL)

YES

YES

YES

YES

Check for 16 MHz Clock waveform

at pin4 of AIC100

Check VCW1

Check for voltage at pin27 of

AIC100 is OV when power

is turned on

Check for signal at pin1,2,3

of AIC100

Check for audio signal at

pin13,16 of AIC100

B

Check VCW1

See “No Video”

Replace

NO

NO

NO

NO