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No power supply (Front LED does not light up) and no power-up even is turned on (Front LED light up to blue)
Is the AC cord connected?
Yes
Are the harness and Cable connected
properly?
Yes
Are F7502 normal?
Yes
Is the voltage of C7528 approx. 168V?
Yes
Are UR12V supplied?
Yes
Are the harness and Cable connected
properly?
Yes
Turn on the power again,and check if
the unit works normally.
TROUBLESHOOTING TABLE
No
Connect the AC cord and turn on the power.
No
Connect the harness and Cable properly.
No
Replace F7502 when the fuse is brown.
No
Check if L7501,TH7501 and D7527 are normal.
No
Does AC-CTRL (pin9 of SC7501) become High (approx. 3.3V)?
Check the rectifier circuit of UR12V
No
Connect the harness and Cable properly.
45
Yes
Is the main unit normal?
LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U
No
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