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2
Is the signal level at R224
a few tens or hundreds VAC?
Yes
Resolder R224 and J201.
1
3
Voltage at Pin 4 of U205
= 1.5~1.9 VDC ?
Yes
Is the signal level
across C122
a few tens or
hundreds VAC ?
Yes
Resolder C232.
Yes
Does it work well?
Yes
No
Redownload software.
Does it work well?
No
Resolder
R226, C240
No
Resolder C122
Redownload software.
No
Does it work well?
Yes
1
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4. TROUBLE SHOOTING
No
Yes
Change the main board.
Change
the main board.
No
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