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4. Trouble shooting
Power can not be turned on (LED is not light)
Is the input voltage
applied to the AC/DC
Power unit ?
(PESW1 4, 6)
applied to pins7,11(PSD3)
of the Signal PWB ?
Signal PWB
Picture is displayed. But no sound
Are
Voltage
applied to pins 4(PSD3)
of the Signal PWB ?
Are
signals
there
Speaker ?
Speaker
Yes
Are
Voltage
Yes
7 : +5.6V
11 : +4.4V
9 : GND
Yes
4 : 14V
5 : GND
on
Yes
No
AC inlet
Power switch
No
AC/DC
Power unit
No
AC/DC
Power unit
No
Signal PWB
4
AC Fuse
F911 10A250V
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