13
TROUBLESHOOTING
12
TROUBLESHOOTING
3. VIDEO circuit
A. EE screen doesnÕt appear
EE MODE Picture NG
Is Video signal input at
IC301 pin#48,50,52,54?
Is 5V supplied at
pin#42,55,72,91of IC301?
Is C.S, DATA, CLOCK signal
input pin#67,68,69 of IC301?
Check IF and SCART JACK.
Check POWER circuit.
Check IC501
pin #58,66,67
NO
YES
YES
NO
NO
YES
Is signal output from pin#65 of
IC301?
YES
NO
Check IC301
pin#62 Q-V Sync.
Is signal input into pin#13
of P100?
YES
NO
Check PCB Pattern.
Is signal output from pin#1
of P100?
YES
NO
Check MPEG circuit.
Is signal output at IC301
pin#61?
YES
NO
Check PCB Pattern.
Is signal input at IC301
pin#56?
Check RF Output.
Check PCB Pattern & LINE
out.
YES
YES
Check IC301.
NO
B. Playback picture doesnÕt appear
1) No VCR Playback Picture
YES
YES
Is Y SIGNAL output at IC301
pin#46?
Is VIDEO SIGNAL output at IC301
pin#65?
Check and Replace IC301.
PB video signal missing.
Is Envelope output from IC301
pin#79?
NO
NO
Same as EE MODE check.
Is 5V supplied at IC301 pin#91?
Is SW Pulse input at IC301
pin#70?
Is 5V obtained at IC301 pin#24,
42,55,72,91?
Check POWER 5V.
Check IC501 pin#18.
Clean head or Replace head.
Check POWER 5V.
NO
NO
Check PATTERN
NO
YES
YES
YES
YES
YES
YES
NO
Does X301(4.43MHz)
oscillate?
Is Y SIGNAL input at IC301
pin#43?
NO
Check PATTERN
YES
NO
Replace X301.
NO
Check and replace IC301.
Summary of Contents for DF-8100
Page 5: ...7 TROUBLESHOOTING 6 TROUBLESHOOTING B Digital Board...
Page 16: ...28 CIRCUIT DIAGRAM 1 SERVO SYSCON SCHEMATIC DIAGRAM DVDR VCR...
Page 17: ...29 CIRCUIT DIAGRAM 2 AV IC SCHEMATIC DIAGRAM DVDR VCR...
Page 18: ...30 CIRCUIT DIAGRAM 3 Hi Fi SW IN OUT CIRCUIT SCHEMATIC DIAGRAM DVDR VCR...
Page 19: ...31 4 ADC DAC VIDEO AMP CIRCUIT DIAGRAM...
Page 20: ...32 CIRCUIT DIAGRAM 5 PIF CIRCUIT DIAGRAM...
Page 21: ...33 CIRCUIT DIAGRAM 6 FRONT PART SCHEMATIC DIAGRAM...
Page 22: ...34 CIRCUIT DIAGRAM 7 POWER SUPPLY SCHEMATIC DIAGRAM...
Page 23: ...35 CIRCUIT DIAGRAM 8 8602 CODEC...
Page 24: ...36 CIRCUIT DIAGRAM 9 TERMINATION...
Page 25: ...37 CIRCUIT DIAGRAM 10 DDR SDRAM...
Page 26: ...38 CIRCUIT DIAGRAM 11 RST AV ELINK CONNECTOR...
Page 27: ...39 CIRCUIT DIAGRAM 12 FLASH ATAPI...
Page 28: ...40 CIRCUIT SCHEMATICS 13 1394 PHY...
Page 29: ...41 CIRCUIT SCHEMATICS 14 POWER CONNECTOR...
Page 30: ...42 CIRCUIT SCHEMATICS 15 VIDEO DECORDER SAA7115...
Page 31: ...43 PCB CIRCUIT BOARD 1 MAIN PCB...
Page 32: ...44 PCB CIRCUIT BOARD 2 FRONT PANEL PCB...
Page 33: ...45 PCB CIRCUIT BOARD 4 MPEG PCB 3 POWER PCB...
Page 34: ...47 INSTRUMENT DISASSEMBLY 46 INSTRUMENT DISASSEMBLY...
Page 43: ...686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA DAEWOO ELECTRONICS Corp...
