21
TROUBLESHOOTING
Is playback audio signal output
at IC252 pin#3,13?
Is 12V obtained at IC252
pin#16?
Replace IC252.
NO
IC601 pin#31 is L, pin#21 is
L?
Check IC601.
NO
Is there playback audio signal
at IC251 pin#16,17?
Replace IC251.
NO
Is there Audio at IC252
pin#1,12?
Check signal flow circuit
from IC251 to IC252.
NO
Check POWER circuit.
NO
YES
YES
C at Q904 is L or H?
Check MUTE circuit.
H
L
YES
YES
YES
Check OutputJACK.
B. No Hi-Fi playback audio (PLAY MODE)
Is there A.SW signal at IC251
pin#41?
Check A.SW at IC601 pin#19.
NO
Is about 3.5V obtained at
IC252 pin#9, 10?
Check R646, R647, R911,
R913
NO
YES
Summary of Contents for DV6T112D
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 ...
