BDP-S2100 - Sony DVD Service Manual (repair manual). Page 55

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BDP-S2100
6-3
6-2. Power (System) Flow
AC IN
Check the output voltages from the power 
supply block.
CN201 pin 1: +12V (UNSW12V)
CN201 pin 2: +12V (FE_UNSW12V) 
No
Yes
Check the fuses
Have any of the below fuses blown?
MB board: PS201, 
PS202
No
Check the following power control signals
while the power is ON
PCONT1#
: MB board
R288, R205,R243
Yes
Check Voltage lines that are not output are  
shorted to GND
No
Failure of power supply IC ->
Replace the MB board.
Check that the harness has been inserted 
properly. If there is no problem,  
power supply block 
NG
.
 Blown fuses --> Replace the MB board
Yes
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