Samsung RB17AS-NS, RB17AS Troubleshooting
5 Troubleshooting
5-1 No Power
Does proper DC 12 V appear at
DC jack connected to CN117?
Yes
Does proper DC 5 V appear at
Pin 1 of IC118?
Yes
Does proper DC 12V appear at
Pin 2 of IC109?
Yes
Does proper DC 3.3 V appear at
Pin 1 of IC120?
No
Check SMPS PCB and Adapter.
No
Check IC118.
No
Check IC109.
No
Check IC120.
Yes
Does proper DC 2.5 V appear at
Pin 3 of IC120?
Yes
Check IC122.
RB17AS/RB17NS 5-1
No
Check IC120.
5 Troubleshooting
5-2 No Video (PC Signal)
Power indicator is green.
Does the signal appear at
Pin 7, 15, 22, of IC134?
Yes
Does the clock pulse appear at
Pin 115, 117 of IC134?
Yes
Does the clock pulse appear at
output of RA100 ~ RA105?
Yes
Does the clock pulse appear at
Pin 37 ~ 48 of IC106?
No
No
No
No
Check R490, R491, R492,
C437, C439, C441.
Check IC134 and related circuit of IC134.
Check related circuit of IC119.
Check IC106 and related circuit of IC106.
Yes
Does the clock pulse appear at
output of FT105 ~ 114?
Yes
Replace LCD Panel.
5-2 RB17AS/RB17NS
No
Replace FT105 ~ FT114.
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