45
TROUBLESHOOTING(VCR)
B. Playback picture doesn t appear
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
NO
YES
YES
YES
YES
YES
YES
NO
Does X301(4.43MHz)
oscillate?
Is Y SIGNAL input at IC301
pin#43?
NO
YES
NO
NO
Check PATTERN
Replace X301.
Check PATTERN
Check and replace IC301.
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 ...