2. SYSTEM CIRCUIT
6
TROUBLESHOOTING
No VFD display.
Is 5V obtained at IC701 pin#13?
Is -24V obtained at IC701 pin#30?
Oscillation at IC701 pin #8?
Is -24V, -20V obtained at F-,
F+?
Specific GRID/SEG doesn t function.
Check D721.
Check POWER circuit at -24V.
Check IC701.
Check IC 701 pin #31~42.
Check IC 701 pin #14~29.
NO
YES
YES
YES
YES
NO
NO
NO
NO
GRID output at PORT of IC701?
YES
SEG output at PORT of IC701?
Check POWER circuit at F-, F+.
Exchange IC501.
YES
A. VFD DISPLAY
NO
Summary of Contents for DCR-9130 SERIES
Page 36: ...35 CIRCUIT DIAGRAM 1 POWER SUPPLY SCHEMATIC DIAGRAM VCR DVD COMBO RECEIVER PAL...
Page 37: ...36 CIRCUIT DIAGRAM 2 SERVO SYSCON CIRCUIT DIAGRAM COMBO RECEIVER PAL...
Page 38: ...37 CIRCUIT DIAGRAM 3 A V CIRCUIT DIAGRAM...
Page 39: ...38 4 HiFi SW INPUT CIRCUIT DIAGRAM CIRCUIT DIAGRAM...
Page 40: ...39 CIRCUIT DIAGRAM 5 Hi Fi PI F SCHEMATIC DIAGRAM COMBO RECEIVER PAL...
Page 41: ...40 CIRCUIT DIAGRAM 6 DIGITAL AUDIO VIDEO SCHEMATIC DIAGRAM COMBO RECEIVER PAL...
Page 42: ...41 CIRCUIT DIAGRAM 7 RECEIVER FRONT PART SCHEMATIC DIAGRAM...
Page 43: ...42 CIRCUIT DIAGRAM 8 DIGITAL AMP SCHEMATIC DIAGRAM PAL...
Page 44: ...43 PCB CIRCUIT BOARD 1 1 LOGIC PCB CIRCUIT BOARD...
Page 45: ...44 PCB CIRCUIT BOARD 1 2 AMP PCB CIRCUIT BOARD...
Page 46: ...45 PCB CIRCUIT BOARD 1 3 MAIN PCB CIRCUIT BOARD...
Page 47: ...46 PCB CIRCUIT BOARD 1 4 POWER PCB CIRCUIT BOARD...
Page 49: ...48 INSTRUMENT DISASSEMBLY Fig 4 LOGIC PCB Removal Fig 3 Panel Front Removal...
Page 50: ...49 INSTRUMENT DISASSEMBLY Fig 5 DECK LOADER POWER BOARD Removal...
Page 51: ...50 INSTRUMENT DISASSEMBLY Fig 6 Main Board Removal...
Page 52: ...51 INSTRUMENT DISASSEMBLY Fig 7 Chassis Main Removal...
Page 53: ...52 INSTRUMENT DISASSEMBLY...
Page 66: ...686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA DAEWOO ELECTRONICS Corp...
