Daewoo DV-F46/26N Service Manual

Contents

Daewoo DV-F46/26N Service Manual Manual pdf 16 page image

SECTION 3. TROUBLE SHOOTING FLOW CHART3-1. POWER CIRCUIT• When change the parts which are out of order, first, remove the power plug from the socket and then discharge thevoltage across between both terminals of C807. (Use an external scores of KΩ 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 IC801, check FUSE and Cement resistance surely.13Prepare the instrumentconnecting the insulating trans.Is F801 fuse opened?Have the noise been heardin the trans?Is the value of registorR806 (0.68 ) normal?Check L801, D801 and C806.NONOYESYESYESNONOYESYESNO output Voltage.A. CHECKING THE PRIMARY CIRCUIT.Change F801.YESChange.NOYESIs voltage applied to D801?AABIs the power trans normal?