Samsung HT-BD1255 Service Manual page 55

4-1-11 Disc skips or freezing
Disc skips or freezing
All Media
(BD/DVD/CD) NG?
Only BD NG?
Only DVD NG?
Only CD NG?
Change the MAIN PCB
Samsung Electronics
No
Yes
Yes
No
No
No
Check Power
PiC1 (3.3V), L1112 (1.2V),
IC23 (5V)?
Yes
Check the clock at
X-TAL1 25MHz?
 Refer to image of
Yes
Fig. 4-14.
Change the MAIN PCB
Check U100's phreperial part
Q3 Emitter
Voltage check
Q2: DVD, Q1:CD
4V ~ 6.5?
 Refer to image of
Yes
Fig. 4-15.
RFIP Check?
Signal level OK?
BD: over 400mV
DVD: over 200mV
CD: over 200mV
 Refer to image of
Fig. 4-16.
Yes
Change the MAIN PCB
Troubleshooting
No
SMPS Check
No
like soldering etc.
No
Change the DECK
No
Change the DECK
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