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