BDP-S5000ES - Sony DVD Service Manual (repair manual). Page 127

IFD Board Flow

Is each voltage supplied to CN101?

No

Replace power block

See interface diagram_CN101 for voltage
values

䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭Yes

Each voltage is not supplied to CN102 during
P-ON

No

Replace IC402 microcomputer

See interface diagram_CN102 for voltage
values

䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭Yes

PS101, 102, 103 and 501 are not open

No

Remove the IFD board and check the
following for short circuits. Are there any short
circuits?

No

CN102 pin 1 㹤 GND, Pins (3-5) 㹤 GND
C119 㹤 GND
CN502 pin 5 㹤 GND

䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭Yes

䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭Yes

If C119 is short-circuited, replace IC102,103
and 501, then replace IC link. Otherwise,
reaplce IFD board.

Signals below (PCONT) are Hi (2.5V or
higher) during P-ON

No

Replace IC402 microcomputer

IC101 pin 1
IC102 pin 7
IC103 pin 7
IC104 pin 1
IC501 pin 1

䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭䇭  Yes

Check the voltages below and replace IC that
are NG
IC101 pin 4: 3.3V
IC102 pin 3: 3.3V
IC103 pin 3: 1.55V
IC104 pin 5: 5V
IC501 pin 1: 11.7V/ 9.0V/ 7.1V

䊶PS102 is open 㹢 MB board is faulty.
Replace it, and then replace PS102.
䊶PS103 is open 㹢 If there is a short circuit
within MB board, replace MB board, and then
replace PS103. If there is a short circuit within
VP board, go 

to VP Board Flow

.

䊶PS501 is open 㹢

To AU Board Flow