Atec AV32OPD - Sound Related Troubles

- Sound Related Troubles
There is NO SOUND.
Re
p
lace Power Board
Replace CHASSIS (VBC3002) BOARD
Replace Speaker
Check Power of Sound supply.
Check J701 9,10 24V in VCB4430
BOARD
Check Output of Speaker:
Check if there is output
signal of PIN(1) in VCB4430
board
J41, J42.
Fail
Pass
Pass
Check Power of Sound supply:
Check U502, PIN(33) 12V in
VCB4430 BOARD.
Check
12
VofL
701
(
Inductor
)
POWER BOARD REF.
CN401 PIN(1) 5V,
PIN(5) INV ON, PIN(9&10)
12V are OK?
Fail
Check CHASSIS (VBC3002) BOARD
Fail
Check CHASSIS (VBC3002) BOARD
Fail
Pass
Pass
Pass