Samsung DW21G5VDX/XEF, Service Manual, Page: 26 / 82

Troubleshooting 5-10
Samsung Electronics
Check DIC1,MIC1 peripheral short
Check 27MHz oscillating part.
Replace SIC1
DVD play error
'NO DISK'appers
afrer pick-up moves up and
down twice at power on?
27MHz clock is
input in DIC1-14?
Yes
Yes
Yes
Yes
No
Signals are output
from SIC1-42,44?
Yes
No
ZIC1 peripheral soldering
and short check.
Check the connection between
pin 1 in PCNS1 and pin 3 in ZIC5
Check the connection between
pin 6 in ZIC4 and pin 129 in ZIC1
Check the soldering of ZIC1
DVD Video output error
Pin of VDD-2.5&
VDD-3.3 in ZIC1 has
normal level?
27MHz clock is
input is normal at
pin 159 in ZIC1?
Yes
No
Anlog output is
normal at pin133 in
ZIC?
Yes
Check the connection between
pin 133 in ZIC1 and ICD302
Check the connection between
ICD302 and emitter of ICD105
Check the connection between
pin23 in ICD601 and pin in ICD302
No
Analog signals are
inputted normally
pin7 in ICD302
Yes
No
Power is normal
at pin16 in ICD302?
Yes
No
No
Check IC202-5,6 and IC701-8
No
Pin 1 in ICD302
is in low stste?
Yes
Check the soldering of ICD302
No Output level is normal
at pin10,14,15(Y signal)and
pin12,13(C signal) in ICD302?
Yes