
2. SYSTEM CIRCUIT
6
TROUBLESHOOTING
No LED display.
Is 5V obtained at IC701
pin #9, 25?
Oscillation at IC701 pin #1?
Specific GRID/SEG doesn’t
function.
Check R705, L601.
Exchange IC701.
Check IC 701 pin #22~24, 27,
28, 30, 31.
Check IC 701 pin #10~12, 14~21.
NO
YES
YES
NO
NO
GRID output at PORT of
IC701?
YES
SEG output at PORT of IC701?
Exchange IC601.
YES
A. LED DISPLAY
NO
Содержание DV6T112D
Страница 27: ...26 WAVEFORMS 15 9 P201 2 2 AUDIO 2 1 AUDIO Mono ...
Страница 29: ...28 CIRCUIT DIAGRAM 1 POWER SUPPLY SCHEMATIC DIAGRAM PAL COMBO ...
Страница 30: ...29 CIRCUIT DIAGRAM 2 AV CIRCUIT DIAGRAM ...
Страница 31: ...30 3 SERVO SYSCON SCHEMATIC DIAGRAM CIRCUIT DIAGRAM ...
Страница 32: ...31 4 DIGITAL AUDIO SCHEMATIC DIAGRAM CIRCUIT DIAGRAM ...
Страница 33: ...32 5 HI FI SW CIRCUIT DIAGRAM CIRCUIT DIAGRAM ...
Страница 34: ...33 CIRCUIT DIAGRAM 6 IF MPX PDC INPUT OUTPUT SCHEMATIC DIAGRAM ...
Страница 35: ...34 PCB CIRCUIT BOARD 1 1 VCR MAIN ...
Страница 36: ...35 PCB CIRCUIT BOARD 1 2 POWER ...
Страница 37: ...36 PCB CIRCUIT BOARD 1 3 LOGIC ...
Страница 39: ...38 INSTRUMENT DISASSEMBLY FIG 3 C PANEL FRONT DISASSEMBLY ...
Страница 40: ...39 INSTRUMENT DISASSEMBLY FIG 4 D LOGIC PCB DISASSEMBLY ...
Страница 41: ...40 INSTRUMENT DISASSEMBLY FIG 5 E DECK AND MAIN PARTS DISASSEMBLY ...
Страница 42: ...41 INSTRUMENT DISASSEMBLY FIG 6 F MAIN PCB DISASSEMBLY ...
Страница 43: ...42 INSTRUMENT DISASSEMBLY FIG 7 G MAIN CHASSIS DISASSEMBLY ...
Страница 44: ...43 INSTRUMENT DISASSEMBLY FIG 8 ...