27
TROUBLESHOOTING
2. Front Circuits
No VFD Letter Display or Broken
Letter
-15V obtained at F(+), -19.5V at
F(-)?
+5V obtained at IC710 pin #1,
#44?
-24V obtained at IC710 pin #16,
#17?
Input signal obtained at IC710 pin
#12, #13, #15?
Pulse output at IC710 pin #14?
Check POWER circuit
Check POWER circuit
Check POWER circuit
Check IC 710
Check IC 710
NO
YES
YES
YES
YES
NO
NO
NO
NO
Oscillation at IC710 pin #2,
#4?
YES
1.5V obtained at R760 when POWER switch is
pushed? 3V obtained at R761 when OPEN switch
is pushed? 4V obtained at R762 when PAUSE
switch is pushed?
Check communication line with
DVD B/D
Check communication line
between IC710 and VFD
YES
NO
Check wire connection between P710
and P900
Check IC 710
NO
Check SW900, SW901
NO Problem
YES
NO Problem
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Summary of Contents for DQD-6100D
Page 6: ...5 CIRCUIT DIAGRAM VIDEO All manuals and user guides at all guides com a l l g u i d e s c o m...
Page 7: ...6 CIRCUIT DIAGRAM AUDIO All manuals and user guides at all guides com...
Page 8: ...7 CIRCUIT DIAGRAM VFD JOG All manuals and user guides at all guides com...
Page 9: ...8 CIRCUIT DIAGRAM ETC All manuals and user guides at all guides com...
Page 10: ...9 CIRCUIT DIAGRAM VCR_INT DVD All manuals and user guides at all guides com...
Page 12: ...11 CIRCUIT DIAGRAM CPU ZR36703 DVD All manuals and user guides at all guides com...
Page 13: ...12 CIRCUIT DIAGRAM MPEG DECODER All manuals and user guides at all guides com...
Page 48: ...47 DISASSEMBLY All manuals and user guides at all guides com...
Page 49: ...48 DISASSEMBLY All manuals and user guides at all guides com...
Page 50: ...49 DISASSEMBLY All manuals and user guides at all guides com...
Page 51: ...50 DISASSEMBLY All manuals and user guides at all guides com a l l g u i d e s c o m...
