
FLOW CHART
19
SECTION 4.
TROUBLESHOOTING FLOW CHART
4-1. P
OWER
C
IRCUIT
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 1K
Ω
(2W) 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.
Prepare the oscilloscope
connected the isolated
transformer
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
Check F801 Fuse.
Is voltage applied to D801?
Is voltage applied to the
terminals of C807?
Is 5.7 voltage applied to
IC11 control pin
Check the secondary circuit
No output Voltage.
Check T11 :
#
~
^
pin,
L12 and IC11
Is varation between 5.7V
and 4.8V at IC11 control pin
Check L801, L802
Check R803, D801
Содержание DV-K*04W Series
Страница 71: ...CIRCUIT DIAGRAMS 68 SECTION 9 CIRCUIT DIAGRAM 9 1 CONNECTION DIAGRAM DV K884W K484W K284W ...
Страница 72: ...CIRCUIT DIAGRAMS 69 9 2 POWER CIRCUIT DIAGRAM DV K884W K484W K284W ...
Страница 73: ...CIRCUIT DIAGRAMS 70 9 3 SYSCON AND LOGIC CIRCUIT DIAGRAM ...
Страница 74: ...CIRCUIT DIAGRAMS 71 9 4 PIF CIRCUIT DIAGRAM DV K884W K484W K284W ...
Страница 75: ...CIRCUIT DIAGRAMS 72 9 5 IF MPX MODULE CIRCUIT DIAGRAM DV K884W K484W K284W ...
Страница 76: ...CIRCUIT DIAGRAMS 73 9 6 VIDEO AUDIO CIRCUIT DIAGRAM DV K884W K484W K284W ...
Страница 77: ...CIRCUIT DIAGRAMS 74 9 7 Hi Fi PRE AMP CIRCUIT DIAGRAM DV K884W K484W K284W ...
Страница 78: ...DISASSEMBLY 79 SECTION 11 DISASSEMBLY 11 1 PACKING ASS Y ...
Страница 79: ...DISASSEMBLY 80 11 2 FRONT PANEL ASSEMBLY ...