III –
28
3.6
Power Supply PCBs
[ 1 ]
Low-voltage power supply PCB
The low-voltage power supply uses the switching regulation system to generate DC power
(+5V and +24V) from a commercial AC power supply for the driver circuits. The +5V source
is fed to the logic, control panel, sensors, CCD unit, etc.; the 24V source is fed to the motors,
solenoid, fans, LED array, and the high-voltage power supply PCB.
The low-voltage power supply also feeds AC power to the heater of the fixing unit.
Low-voltage Power Supply Circuit
Heater
Circuit
Thermal
Fuse
Lightning
Surge
Absorber
Feedback
Line
Filter
Fuse
Rectifier
Switching
Circuit
24V
Detector
5V
Regulation
Circuit
24V
5V
FU lamp
(Heater)
(Driver circuits)
Содержание MFC 4550
Страница 5: ...CHAPTER I GENERAL DESCRIPTION ...
Страница 14: ...CHAPTER II INSTALLATION ...
Страница 15: ...CONTENTS 1 INSTALLING THE UPDATE DATA TO THE FACSIMILE EQUIPMENT II 1 ...
Страница 18: ...CHAPTER III THEORY OF OPERATION ...
Страница 49: ...CHAPTER IV DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Страница 81: ...CHAPTER V MAINTENANCE MODE ...
Страница 89: ...V 7 Scanning Compensation Data List 200 dpi ...
Страница 133: ...CHAPTER VI ERROR INDICATION AND TROUBLESHOOTING ...
Страница 163: ...MAIN 8 8 FAX3550 3650 8000P 8200P MFC4550 6550MC 7550MC MFC9000 9500 A ...
Страница 185: ...D CONTROL PANEL 1 2 ...
Страница 187: ...E POWER SUPPLY 120 V Low voltage power supply ...
Страница 188: ...E POWER SUPPLY 200 240 V Low voltage power supply European versions ...
Страница 189: ...E POWER SUPPLY 200 240 V Low voltage power supply Asian versions ...
Страница 190: ...E POWER SUPPLY High voltage power supply ...
Страница 191: ...Sept 98 5X52012 Printed in Japan ...