No power supply (Front LED does not light up) and no power-up even is turned on (Front LED light up to blue)
Yes
No
No
Yes
No
Yes
No
Yes
Replace F7502 when the fuse is brown.
Connect the harness and Cable properly.
Connect the AC cord and turn on the power.
Is the AC cord connected?
Are the harness and Cable connected
properly?
No
Connect the harness and Cable properly.
Are the harness and Cable connected
properly?
Is the voltage of C7528 approx. 168V?
Are F7502 normal?
Yes
No
Is the main unit normal?
Yes
No
Yes
Check the rectifier circuit of UR12V
Does AC-CTRL (pin9 of SC7501) become High (approx. 3.3V)?
Are UR12V supplied?
Turn on the power again,and check if
the unit works normally.
Check if L7501,TH7501 and D7527 are normal.
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