Read JBL BD 100 (serv.man2) Service Manual online
No audio output
refer to <
NO +32V
output
>
Check 32v(BD100 is 20V)
voltage on AM P board is
normal
voltage on AM P board is
normal
Check the signals of I2S
(XP11 Pin 1,2,3,4,5,7)
Check the connect line is OK
Yes
No audio output
Trouble shooting chart
Yes
NO
NO
Check U 801’s output(U801
pin4,8,12,) is right, check the
signal of Valid (R774 )is high
pin4,8,12,) is right, check the
signal of Valid (R774 )is high
Yes
Check
U7
is outpu
t
is,C12,A12,B12,C11,D11,D12,
NO
Yes
Check AMP IC
U710/U711/U712 is right
U710/U711/U712 is right
Replace U710/U711/U712
NO
Replace the speaker
5- 2
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