Samsung DV7620 Troubleshooting

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

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