52
TROUBLESHOOTING(VCR)
E. No NORMAL AUDIO playback in record/playback mode(Check in REC mode)
No Normal Audio playback in
record/playback mode
Are there Audio signal at IC251
pin#6~9?
Is there recording signal at
IC251 pin#21?
Check DTT CVBS
Check Input AV JACK.
Check signal flow circuit.
YES
NO
NO
NO
Signal at IC251 pin#21 is transferred to
IC301 pin#13,15,17?
At C222 is about 70Vp-p at
70KHz?
Check IC251.
YES
YES
Check Q203.
NO
Check P201 pin#2, 4, 8 and A/C
HEAD.
YES
REC (H) BASE voltage at Q206
is 5V?
Check IC501 pin#21.
NO
YES
Summary of Contents for DSI-9100
Page 5: ...4 SCHEMATIC DIAGRAM ...
Page 6: ...5 SCHEMATIC DIAGRAM ...
Page 7: ...6 SCHEMATIC DIAGRAM ...
Page 8: ...7 SCHEMATIC DIAGRAM ...
Page 9: ...8 SCHEMATIC DIAGRAM MPEG STI5518 ...
Page 10: ...9 SCHEMATIC DIAGRAM MPEG CIMAX ...
Page 11: ...10 SCHEMATIC DIAGRAM MPEG MEMORY 27M ...
Page 12: ...11 SCHEMATIC DIAGRAM MPEG VIDEO ...
Page 13: ...12 SCHEMATIC DIAGRAM MPEG AUDIO ...
Page 14: ...13 SCHEMATIC DIAGRAM MPEG POWER RS 232 VCR CON ...
Page 15: ...1 Block Diagram 14 CIRCUIT INFORMATION MPEG ...
Page 24: ...23 CIRCUIT INFORMATION MPEG EMI Interface Timing ...
Page 59: ...58 PCB CIRCUIT BOARD 1 MAIN PCB Circuit Board ...
Page 60: ...59 PCB CIRCUIT BOARD 2 MPEG PCB Circuit Board ...
Page 61: ...60 INSTRUMENT DISASSEMBLY 1 PACKING ASS Y ...
Page 62: ...61 INSTRUMENT DISASSEMBLY 2 FRONT PANEL ASSEMBLY 1 7H32D ...
Page 63: ...62 INSTRUMENT DISASSEMBLY 2 4J32D ...
Page 64: ...63 INSTRUMENT DISASSEMBLY 3 SET TOTAL DISASSEMBLY ...
Page 76: ...686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA DAEWOO ELECTRONICS Corp ...