Sony BDP-S500 (serv.man2) Service Manual ▷ View online
5-11
Flowchart No.3
FL display tube does not light
Is 5V voltage supplied to connector CN100 17pin
on FL board? (If the voltage is 5V, go to “No”)
Is 0V voltage supplied to connector CN100 10pin
on FL board?
Press the DIMMER button. If not improved, check/replace the FL
board flexible cable (MAIN
h
FL).
If not improved by replacement, replace the Main board.
FL board flowchart 2
No
Check/replace the FL board flexible cable (MAIN
h
FL).
If not improved by replacement, replace the Main board.
No
Check/replace the FL board flexible cable (MAIN
h
FL).
If not improved by replacement, replace the Main board.
No
Are STB, CLK and DIN signals input to connector
CN100 2, 4, 5 pins on FL board?
CN100 5pin STB
CN100 2pin CLK
CN100 4pin DATA
Yes
Yes
Yes
Operation & Display Section
5-12
Flowchart No.4
LED does not light up
5V voltage supplied to connector CN100 15pin, 17pin on
FL board?
No
Check/replace the FL board flexible cable (MAIN
h
FL).
If not improved by replacement, replace the Main board.
No
Check/replace the FL board flexible cable (MAIN
h
FL).
If not improved by replacement, replace the Main board.
3.3V voltage supplied to connector CN100 on
FL board?
CN100 24pin Power button
CN100 26pin Blue HD
CN100 12pin HD
CN100 11pin HDMI
Does the LED on FR board light up?
No
Check LED peripheral parts on FL board.
Yes
Yes
Yes
Symptom improved if FR board is replaced?
Yes
Check LED peripheral parts on FR board.
CN100 10pin FL OFF
If faulty, replace the FL board.
No
Replace the FL board flexible cable (FL
h
FR).
If faulty, replace the FR board.
Operation & Display Section
5-13
Is each power supplied to Audio board?
CN001 24pin -12V
CN001 22pin +12V
CN001 20pin +6V
CN001 18pin +3V
Yes
Yes
Yes
No
No
No
Check the power circuits on Audio board
Replace the Main board
IC003 INPUT pin 12V
IC002 INPUT pin 12V
IC001 INPUT pin -12V
Check the outputs of each Reg IC
IC003 OUTPUT pin 5V
IC002 OUTPUT pin 10V
IC001 OUTPUT pin -10V
Check the output of IC006, 007, 008
Check the output and peripheral circuits of IC009,
010, 011
Check the circuits on input side of IC001, 002, 003
Check the circuits on output side of IC001, 002, 003
Audio Section
5-14
Flowchart No.1
FL Section
Key 0 is inactive
Key 1 is inactive Flowchart.
Is about 5V present in CN100 28pin without pressing a key?
Check 5V line, R124 periphery and conductors on the FL board.
If faulty, replace the FL board.
Yes
Yes
Does the potential of CN100 28pin (Key 0) change to
around 1.4V when CN102 4pin and 5pin are short-circuited?
No
Check resistance of resistors on Key1 line.
Also, check peripheral conductor patterns and FFC.
If faulty, replace the FR board.
Yes
No
No
Key 0 is inactive Flowchart.
Key 0 line is broken.
No
Yes
Does the potential of CN100 28pin (Key 0) change
to around 4.3V when Power button is pressed?
No
Check the resistors and conductors on Key 0 line.
Key 1 is inactive
Is about 5V present in CN100 8pin without pressing a key?
Check 5V line, R120 periphery and conductors on the FL board.
If faulty, replace the FL board.
Yes
Yes
Does the potential of CN100 8pin (Key 1) change
when CN101 4pin and 6pin are short-circuited?
No
Check the resistors and conductors on Key 1 line.
If faulty, replace the FL board.
Check resistance of resistors on Key1 line.
Also, check peripheral conductor patterns and FFC.
If faulty, replace the FR board.
Yes
No
Click on the first or last page to see other BDP-S500 (serv.man2) service manuals if exist.