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TROUBLE SHOOTING FLOW CHART
1. POWER CIRCUIT
When changing the parts which are broken first, remove the power plug from the socket and then discharge the voltage
across the terminals of C806. (Use an external K
Ω
resistance)
When check the primary circuit , use the oscilloscope isolated properly (Use the isolated transformer) and connect
GND to the primary GND, however it is not necessary to isolate the oscilloscope when check the secondary circuit.
A. CHECKING THE PRIMARY CIRCUIT
No output Voltage.
NO
NO
Prepare the oscilloscope
connected the isolated
Transformer.
Check L801.
Check M801 Power Module,
D801
YES
YES
YES
YES
YES
Check F801 Fuse.
Is voltage applied to D801?
Is voltage applied to the
terminals of C806?
Check the Secondary circuit