12
TROUBLESHOOTING
B. Playback picture doesn’t appear
YES
YES
Is Y signal output at IC301
pin#46?
Is Y signal input at IC301
pin#43?
Is Video signal output at IC301
pin#61?
Check and Replace IC301.
Check PCB Pattern.
Playback picture doesn’t
appear.
Is Envelope output at IC301
pin#79?
NO
NO
YES
Check Sync separate circuit
and OSD circuit
Is 5V obtained at IC301
pin#91?
Is SW Pulse input at IC301
pin#70?
Is 5V obtained at IC301
pin#21, 57?
Check POWER 5V.
Check IC601 pin#18.
Check and Replace HEAD.
Check POWER 5V.
YES
NO
NO
Does X301(3.58MHz) oscillate?
Check Pattern.
NO
NO
NO
YES
NO
NO
YES
YES
YES
YES
Replace X301.
Is Video signal output at IC301
pin#65?
Check IC301 pin# 62.68,69,70.
NO
YES
Summary of Contents for DV6T811N-LT
Page 27: ...26 WAVEFORMS 15 9 P201 2 2 AUDIO 2 1 AUDIO Mono 2 2 AUDIO HI Fl Q901 collector...
Page 29: ...28 CIRCUIT DIAGRAM 1 POWER SUPPLY SCHEMATIC DIAGRAM 120V ONLY 5...
Page 30: ...29 CIRCUIT DIAGRAM 2 PO W ER SUPPLY SCH EM ATIC DIA G RA M DV D CO M BO FREE 5...
Page 31: ...30 CIRCUIT DIAGRAM 3 VIDEO AUDIO SCHEMATIC DIAGRAM...
Page 32: ...CIRCUIT DIAGRAM 4 SERVO SYSCON SCHEMATIC DIAGRAM 31...
Page 33: ...CIRCUIT DIAGRAM 5 DIGITAL AUDIO SCHEMATIC DIAGRAM 32...
Page 34: ...CIRCUIT DIAGRAM 6 Hi Fi SW CIRCUIT DIAGRAM 33...
Page 35: ...CIRCUIT DIAGRAM 7 INPUT AUTPUT SCHEMATIC DIAGRAM 34...
Page 36: ...CIRCUIT DIAGRAM ATATI 35...
Page 37: ...CIRCUIT DIAGRAM 36...
Page 38: ...CIRCUIT DIAGRAM CPU 37...
Page 39: ...CIRCUIT DIAGRAM DECODER 38...
Page 40: ...39 PCB CIRCUIT BOARD 1 1 VCR MAIN 6...
Page 41: ...PCB CIRCUIT BOARD 1 2 POWER 40...
Page 42: ...PCB CIRCUIT BOARD 1 3 LOGIC 41...
Page 43: ...PCB CIRCUIT BOARD 2 1 DVD MAIN A 42...
