Casio AP-10 - Troubleshooting Common Issues; Troubleshooting No Power

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Check fuse F101.
Is F101 blown up?
Check fuse F102.
Is F102 blown up?
Is voltage 14 V AC?
Is voltage VC 17 V DC?
Is voltage VDD + 5 V DC?
Does signal NMI vary
as Fig 1?
Does signal POWER vary
as Fig 1?
Measure output voltage of
transformer T101.
Replace MA1M PCB.
Replace PS2M PCB.
• Check power switch.
• Check position of voltage
selector.
Is it OK ?
Replace T101.
Set voltage selector at proper
positon.
(A)
No
No
No
Yes
Replace F101.
Replace F102.
Yes
Yes
No
No
No
Yes
Yes
Yes
Yes
No
Fig 1
Yes
No
Switch ON
VDD voltage
Signal NMl
Signal POWER
0.9 sec
TROUBLESHOOTING
1. No power