Alesis BassFire 60 Service Manual page 16

3. Audio normal but not display
Connect signal to front
penal INPUT jack.
OK
Display and relative
components damaged or
short circuit disconnection
OK
Replace with proper one
OK
DONE
4. Display improperly
Check DC voltage
+/-15V, 5V,3.3V and
display
failure
Fix voltage problems
replace display with
proper one
OK
DONE
Only when feed signal to
rear penal AUX INPUT
jack unit will has audio
output
OK
Check DC voltage
+/-15V, 5V,3.3V
normal or not
Fix the voltage
problems.
OK
Change U8 on MAIN
NO
PCB.
OK
CPU and relative
component damaged.
YES
Replace with proper one
OK
NO