Daewoo DV-K11WZ-PB/A, Service Manual

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3. TROUBLE SHOOTING FLOW CHART
POWER CIRCUIT
• When change the parts which are out of order, first, remove the power plug from the socket and then discharge the
voltage across between both terminals of C807. (Use an external scores of K
Ω
resistance)
• When check the primary circuit by using the oscilloscopes insulate the oscilloscope surely. (Use the isulating
transformer) and must connect GND into the primary GND), (But there is no connection when check the secondary
circuit).
• When change SM801(POWER MODULE), check FUSE and Cement resistance surely.
5
YES
NO
NO
YES
YES
YES
YES
Prepare the instrument
connecting the insulating trans.
Check F801 FUSE
Is voltage applied to D801?
Is voltage applied to the
both terminals of C807?
Check power module
Check D801, L801
Check R802
NO output Voltage