Sony BDP-S500 (serv.man2) Service Manual ▷ View online
5-15
FL tube does not light
Is about 5V applied to F100?
Go to “FL tube switch periphery check”
Yes
Yes
Is about -24V applied to JL106?
No
Check the FL tube DD converter peripheral circuits.
If faulty, replace the FL board.
Is 5V applied to IC100 43pin?
No
Check the 5V line on FL board.
Yes
Yes
Does the IC100 5pin oscillate?
No
Replace the IC100.
If not effective, replace the FL board.
Yes
Are the pulses input to IC100 7, 8, 9 pins?
No
Replace the FL-MAIN FFC.
If not effective, replace the Main board.
Yes
Check the wiring between FL tube and IC100.
If OK, replace the IC100.
If not effective, replace the FL board.
No
Flowchart No.2
FL Section
Reference: Relation between buttons and voltages
KEY
KEY0
KEY1
Specified voltages [v]
SPEC
CENTER
PLAY
00
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
5-16
FL tube switch periphery check
Is the potential of Q106 1, 2, 3 pins 5V?
Check the 5V line on FL board.
(for disconnection, GND short, etc.)
Yes
Is the potential of Q106 4pin around 0V?
No
No
No
Is the CN100 10pin voltage 5V?
Replace the Q106
Yes
Yes
R132 is open. pattern is broken, or
short with other pattern
Replace the FL-MAIN FFC.
If not effective, replace the Main board
No
10pin of CN100 becomes 0V when Dimmer button on
remote controller is pressed several times
Yes
Normal just under effect of Dimmer
Flowchart No.3
FL Section
5-17
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