26
TROUBLESHOOTING
1. POWER circuit
✓
Caution
You must use insulated trance during the first part test of POWER circuit.
No POWER
POWER cord/fuse is OK?
Voltage connected at D801?
Voltage connected at L804?
Switching wave at T801 pin
#6,7,8?
D821, D822, D823, D824, D825,
D826, D827 are OK?
Exchange POWER code/fuse
Check L801,L802
Check Q801
Exchange inferior ITEM
Check IC801, IC802
NO
YES
YES
YES
YES
NO
NO
NO
NO
+5V obtained at IC802 base and
+2.5V obtained at emitter?
YES
+12V obtained at Q823 drain and +5V
obtained at Q824 drain?
Check D803,D804,D805
+3.3V obtained at Q821, Q822 base when
POWER OFF "H"?
YES
NO
Check Q823, Q824, Q821, Q822 and
neighboring ITEM
Check L812, L822
NO
Check DVD PCB
NO
Содержание DQD-2100D
Страница 5: ...4 CIRCUIT DIAGRAM POWER SUPPLY SCHEMATIC DIAGRAM DQD 6100 220V ...
Страница 6: ...5 CIRCUIT DIAGRAM VIDEO ...
Страница 7: ...6 CIRCUIT DIAGRAM AUDIO ...
Страница 8: ...7 CIRCUIT DIAGRAM VFD JOG ...
Страница 9: ...8 CIRCUIT DIAGRAM ETC ...
Страница 10: ...9 CIRCUIT DIAGRAM VCR_INT DVD ...
Страница 11: ...10 CIRCUIT DIAGRAM ATAPI DVD ...
Страница 12: ...11 CIRCUIT DIAGRAM CPU ZR36703 DVD ...
Страница 13: ...12 CIRCUIT DIAGRAM MPEG DECODER ...
Страница 46: ...45 COMPONENTS LOCATION GUIDE ON PCB BOTTOM VIEW ...
Страница 47: ...46 JOG COMPONENTS LOCATION GUIDE ON PCB BOTTOM VIEW M P E G ...
Страница 48: ...47 DISASSEMBLY ...
Страница 49: ...48 DISASSEMBLY ...
Страница 50: ...49 DISASSEMBLY ...
Страница 51: ...50 DISASSEMBLY ...