Sony BDP-S300 - Blu-Ray Disc Player, Service Manual

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5-10
Flowchart No.2
Disabled key operation
No
Symptom improved if FR board is replaced?
Yes
Replace the FR board
No
Check/replace the FL board flexible cable (MAIN h FL).
If not improved by replacement, replace the Main board.
Symptom improved if FL board flexible cable (FLR-011) is
replaced?
FL board flowchart 2
Yes
Replace the FL board flexible cable (FLR-011)
Are the specified voltages output to connector CN100
8 and 28 pins on FL board when each button is pressed?
Power
Pause
Stop
Previous
Next
Open/Close
Play
Key0=28pin: 4.06~4.49 [V]
Key1=8pin: 2.13~2.35 [V]
Key1=8pin: 2.78~3.07 [V]
Key1=8pin: 0.72~0.80 [V]
Key1=8pin: 1.36~1.50 [V]
Key0=28pin: 1.36~1.50 [V]
Key1=8pin: 3.43~3.79 [V]
Yes
No
Reference: Relation between buttons and voltages
KEY
KEY0 KEY1
Specified voltages [v]
SPEC CENTER
PLAY
0 0
OPEN/CLOSE
0.72~0.80 0.76
PAUSE
NEXT
1.36~1.50 1.43
PREVIOUS
2.13~2.35 2.24
P_ON
STOP
2.78~3.07
3.43~3.79
4.06~4.49 2.92
3.61
4.27
Operation & Display Section