JBL BD 100 (serv.man2) Service Manual ▷ View 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
Remote control does not work
Go
Yes
Yes
Yes
Remote control
does not work
does not work
NO
Replace the battery for remote
controller
controller
Check whether the remote
controller’s
controller’s
battery
is
exhausted or not.
Check the IR601 is r ight
output
output
Check the connect line is OK
No
Trouble shooting chart
Replace IR601
5- 3
Can’t read disc or can’t open the disk door
I
Yes
Check the co nnection 4pin cable from the
main board
main board
Can’t read disc or can’t
open the disk door
open the disk door
Check 45pin and 8pin
cable from main board
connection to the l oader is
cable from main board
connection to the l oader is
normal
Replace the loader
NO
GO
Check whether the
DVD loader running is
normal
DVD loader running is
normal
Fix the connection the 45pin cable or
8pin cable.
8pin cable.
NO
Yes
Trouble shooting chart
Check if U11 (pin2) voltage
is normal (about 9V)
Fix R946/R947 or check
U11 (pin3)
voltage is OK (about 12V)
NO
Check R203/R205 are normal
(the voltage between two
(the voltage between two
resistance is 1.5V
Yes
Fix or Replace R203/R205
Yes
5- 4
No video display
Check ifR188 is on
Go
No
No Video display
Add R188
Replace the main board
Yes
Check If L456 is on
No
Add L456
Trouble shooting chart
5- 5
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