25
TROUBLESHOOTING
E. No NORMAL Auido in record/playback mode(Check in REC mode)
No Normal Audio in
record/playback mode
Is there recording signal at
IC251 pin#21?
Check signal flow circuit.
YES
NO
NO
Signal at IC251 pin#21 is
transferred to IC301 pin#13,15,17?
Collect signal at Q203 is
70KHz, about 70Vp_p?
Check IC251.
YES
YES
Check Q202..
NO
Check P202 pin#2, 4, 8 and
A/C HEAD.
YES
REC 'H' BASE voltage at
Q201 is 5V?
Check IC601 pin#22.
NO
YES
IC251 pin#2, 3,
IC251 pin#6, 7,
IC251 pin#10, 11,
IC251 pin#4,5
IC251 pin#8, 9.
Is there Audio signal?
Check IC101(MPX) Block.
Check Input AV1 JACK.
Check Input AV-F JACK.
Check ICD01(DVD) Block.
Check Input AV2 JACK.
NO
Summary of Contents for SD-8100
Page 1: ...SERVICE MANUAL SD 8100...
Page 27: ...27 WAVEFORMS 15 9 P201 2 2 AUDIO 2 1 AUDIO Mono...
Page 29: ...29 CIRCUIT DIAGRAM 1 POWER SUPPLY SCHEMATIC DIAGRAM PAL DVD COMBO FREE...
Page 30: ...30 CIRCUIT DIAGRAM 2 AV CIRCUIT DIAGRAM...
Page 31: ...31 3 SERVO SYSCON SCHEMATIC DIAGRAM CIRCUIT DIAGRAM...
Page 32: ...32 4 DIGITAL AUDIO SCHEMATIC DIAGRAM CIRCUIT DIAGRAM...
Page 33: ...33 5 HI FI SW CIRCUIT DIAGRAM CIRCUIT DIAGRAM...
Page 34: ...34 CIRCUIT DIAGRAM 6 IF MPX PDC INPUT OUTPUT SCHEMATIC DIAGRAM...
Page 35: ...35 CIRCUIT DIAGRAM ATATI...
Page 36: ...36 CIRCUIT DIAGRAM VCR INT...
Page 37: ...37 CIRCUIT DIAGRAM CPU...
Page 38: ...38 CIRCUIT DIAGRAM DECODER...
Page 39: ...39 PCB CIRCUIT BOARD 1 1 VCR MAIN...
Page 40: ...40 PCB CIRCUIT BOARD 1 2 POWER...
Page 41: ...41 PCB CIRCUIT BOARD 1 3 LOGIC...
Page 42: ...42 PCB CIRCUIT BOARD 2 1 DVD MAIN A...
Page 43: ...43 PCB CIRCUIT BOARD 2 2 DVD MAIN B...
Page 45: ...45 INSTRUMENT DISASSEMBLY FIG 3 C PANEL FRONT DISASSEMBLY...
Page 46: ...46 INSTRUMENT DISASSEMBLY FIG 4 D LOGIC PCB DISASSEMBLY...
Page 47: ...47 INSTRUMENT DISASSEMBLY FIG 5 E DECK AND MAIN PARTS DISASSEMBLY...
Page 48: ...48 INSTRUMENT DISASSEMBLY FIG 6 F MAIN PCB DISASSEMBLY...
Page 49: ...49 INSTRUMENT DISASSEMBLY FIG 7 G MAIN CHASSIS DISASSEMBLY...