12
TROUBLESHOOTING
3. VIDEO circuit
EE screen doesn’t appear.
Is Video signal input at IC301
pin#48,50,52,54?
Is 5V obtained at IC301 pin#24,
42, 55, 72, 91?
Is signal input at IC302
pin#1,5,12,13,14,15?
Check LINE JACK and IF circuit.
Check DVD circuit.
Check POWER 5V.
Check LINE JACK and IF circuit.
Check DVD circuit.
NO
A. EE screen doesn’t appear
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
YES
NO
Is signal input at IC601 pin#50?
Check PCB Pattern.
Is signal output at IC302 pin#3?
Check IC302 pin#16VCC. Check
IC302 pin#9,10,11(control DC)
Is signal output at IC601 pin# 52?
Check IC604 pin#3(C sync).
Is signal output at IC301
pin# 62, 63?
Check VCC of IC301 and
pin #68,69.
Check RF Output.
Check LINE.
Is signal input at IC301 pin# 56?
YES
Check PCB Pattern.
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...
