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SECTION 4.
TROUBLE SHOOTING FLOW CHART
4-1. 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 C807 (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.
No output Voltage.
Prepare the oscilloscope connected
the isolated transformer
YES
Check F801 Fuse.
YES
Is voltage applied to D801?
YES
Is voltage applied to the
terminals of C807?
YES
Is voltage applied to the Q801 base?
YES
Is voltage output from pin
#
of
IC801?
YES
Check R806, D802, R807,
R808, R809, DZ801
YES
Check the Secondary circuit
YES
Check L801, L802
Check R802, D801
Check R803, R804, R805, C811
Check Q802
YES
NO
NO
NO
YES
A. CHECKING THE PRIMARY CIRCUIT.
Содержание DV-K882SY-AN
Страница 68: ...SECTION 8 CIRCUIT DIAGRAM 8 1 CONNECTION DIAGRAM 66 ...
Страница 69: ...8 2 POWER CIRCUIT 67 ...
Страница 70: ...8 3 LOGIC CIRCUIT 68 ...
Страница 71: ...8 4 MAIN CIRCUIT 69 ...
Страница 72: ...8 5 VIDEO CIRCUIT 70 ...
Страница 73: ...8 6 HEAD AMP CIRCUIT 71 ...
Страница 74: ...8 7 SECAM CIRCUIT 72 ...
Страница 75: ...8 8 Hi Fi AUDIO CIRCUIT 73 ...
Страница 76: ...8 9 PIF CIRCUIT 74 ...
Страница 77: ...8 10 IF MODULE CIRCUIT 75 ...
Страница 78: ...8 11 A V SCART CIRCUIT 76 ...
Страница 79: ...8 12 OSD CIRCUIT PDC CIRCUIT 77 ...
Страница 80: ...8 13 REMOCON CIRCUIT 78 ...