Cd-Backup Mode Analyze - Alesis CD-TWIN Service Manual

1.4.2 CD-BACKUP mode Analyze

Step 2
Power on
use surveying
instruments to check
voltage
measure voltage
whether correct
YES
use oscilloscope to
measure X1 whether
correct shock
YES
LCD Display whether
correct
YES
System Boot
whether correct
YES
System Check
whether correct
Finish repair
fixed question:
NO
check power circuit
fixed question:
NO
check crystal circuit
fixed question:
NO check LCD / MPU /
CPLD...ect circuit
fixed question:
NO
check MPU relate circuit
fixed question:
NO check IDE device relate
circuit
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