No output (2 channels)
Check
whether power
supply of each channel
is normal
Check
whether mute
circuit signal is
normal
Check
whether power
amplifier board XS8 has
signal output
Check
whether voltage
of power board R100 is
normal
Change relay
Refer to troubleshooting
for "power not on”
Check whether MIC holder
is normal, and check mute
circuit
Check
signal board N104
power supply
Check power supply
Check
whether signal
board
12V voltage
is normal
±
Change N104
Check power circuit
Change signal board N107
N
N
N
N
N
N
Change VD113
N
Y
Y
Y
Y
Y
Y
3. Troubleshooting process doe “No output (2 channels)”is shown as in the figure 3.3.2.3:
Y
Figure 3.3.2.3 Troubleshooting flow chart for “No output (2 channels)”
Check
whether signal
board capacitor C119
C121 have signal
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