Samsung HT-BD1255 - Page 55

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