11
TROUBLESHOOTING
G. DRUM Motor stops
H. CAPSTAN doesn’t rotate
CAPSTAN doesn’t rotate.
Is 14V voltage obtained at P603
pin#2?
YES
NO
NO
NO
YES
YES
Is Capstan PWM fit to IC 601
pin#77?
Is 3.2V voltage obtained at
P603 pin#5?
Is 2~3V voltage obtained at
P603 pin#9?
Check P603 Connector and
Capstan Motor.
Check 14V.
(Q856,Q857,Q852)
Check Capstan FG
(IC 601 #87).
Check R665, R664, R663,
R666, C665.
Check R661, R667, C664.
DRUM Motor stops.
Is 13V voltage obtained at
P603 pin#8?
YES
NO
NO
NO
YES
YES
Is DRUM PWM fit to IC 601
pin#76?
Is 1.2V voltage obtained at
P603 pin#12?
Check Capstan Motor and
DRUM Motor.
Check ON/OFF 13V
(D851, Q856).
Check DRUM PG/FG
(IC 601 #90).
Check R657, R658,C661,C668.
NO
Summary of Contents for DV6T712D
Page 27: ...26 WAVEFORMS 15 9 P201 2 2 AUDIO 2 1 AUDIO Mono...
Page 29: ...28 CIRCUIT DIAGRAM 1 POWER SUPPLY SCHEMATIC DIAGRAM PAL COMBO...
Page 30: ...29 CIRCUIT DIAGRAM 2 AV CIRCUIT DIAGRAM...
Page 31: ...30 3 SERVO SYSCON SCHEMATIC DIAGRAM CIRCUIT DIAGRAM...
Page 32: ...31 4 DIGITAL AUDIO SCHEMATIC DIAGRAM CIRCUIT DIAGRAM...
Page 33: ...32 5 HI FI SW CIRCUIT DIAGRAM CIRCUIT DIAGRAM...
Page 34: ...33 CIRCUIT DIAGRAM 6 IF MPX PDC INPUT OUTPUT SCHEMATIC DIAGRAM...
Page 35: ...34 PCB CIRCUIT BOARD 1 1 VCR MAIN...
Page 36: ...35 PCB CIRCUIT BOARD 1 2 POWER...
Page 37: ...36 PCB CIRCUIT BOARD 1 3 LOGIC...
Page 39: ...38 INSTRUMENT DISASSEMBLY FIG 3 C PANEL FRONT DISASSEMBLY...
Page 40: ...39 INSTRUMENT DISASSEMBLY FIG 4 D LOGIC PCB DISASSEMBLY...
Page 41: ...40 INSTRUMENT DISASSEMBLY FIG 5 E DECK AND MAIN PARTS DISASSEMBLY...
Page 42: ...41 INSTRUMENT DISASSEMBLY FIG 6 F MAIN PCB DISASSEMBLY...
Page 43: ...42 INSTRUMENT DISASSEMBLY FIG 7 G MAIN CHASSIS DISASSEMBLY...
