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FLOW CHART NO.1
No sound from whole unit
check if speaker is ok
Yes
check if public circuit of whole unit
AMP circuit is ok
Yes
check if power supply circuit of whole
unit is ok
Yes
check staic noisy circuit CPU circuit and change components
FLOW CHART NO.2
no sound from radio
check if output of radio is normal
Yes
check radio controlled circuit
Yes
check if power supply of radio is
normal
Yes
check if radio circuit components of around
it is normal
FLOW CHART NO.3
no sound from DVD
check if DVD output is normal
Yes
check if DVD controlled circuit is ok
Yes
check if the related components of DVD
signal channel tie wires
Yes
change Decoder board
No
check and change speaker and output wire
No
No
No
check public circuit and circuit of power supply
No
check and change the related components of radio controlled circuit
No
check and change related components of power supply circuit
No
No
No
No
socket is normal
Troubleshooting
check radio tube and periphery circuit
check and change transormer of power supply and
power commutate circuit
check and change components of around it
check public circuit power supply circuit and change related
components
check and change the related components of DVD
controlled circuit
check and change the related components of DVD
tie wires
socket
9-1
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