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IV –
18
1.14 High-voltage Power Supply PCB and Fan 1
(1)
Remove the screw and the insulation film.
(2)
While pressing down the high-voltage power supply PCB, slightly shift it to the front of
the machine.
(3)
Slightly lift up the high-voltage power supply PCB and disconnect the following four
things:
• Relay–high-voltage flat cable (12-pin)
• Eraser harness (4-pin)
• Fan harness (3-pin)
• Drum grounding harness (2-pin)
NOTE: The fan harness and the drum grounding harness pass through the slot below
the fan motor film.
(4)
Take out the fan 1.
Drum grounding
harness
(Front)
Relay–high-voltage flat cable
High-voltage power supply PCB
Eraser harness
Fan motor film
Fan 1
Main cover
(placed upside
down)
Fan harness
Paper ejection
sensor
Insulation film
■
Reassembling Notes
•
Before reinstalling the high-voltage power supply PCB, check the high-voltage contacts
for any toner particles, paper dust or dirt, and clean them out.
•
When reassembling the above parts, make sure that the harnesses are routed on the
main cover as illustrated in Section 1.23.
•
Once the fan motor film is removed, you are recommended to use a new film.
•
When setting the fan 1, be careful with the installation direction. The name plate should
be face-up (when the equipment is placed upside down).
Summary of Contents for MFC 4550
Page 5: ...CHAPTER I GENERAL DESCRIPTION ...
Page 14: ...CHAPTER II INSTALLATION ...
Page 15: ...CONTENTS 1 INSTALLING THE UPDATE DATA TO THE FACSIMILE EQUIPMENT II 1 ...
Page 18: ...CHAPTER III THEORY OF OPERATION ...
Page 49: ...CHAPTER IV DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 81: ...CHAPTER V MAINTENANCE MODE ...
Page 89: ...V 7 Scanning Compensation Data List 200 dpi ...
Page 133: ...CHAPTER VI ERROR INDICATION AND TROUBLESHOOTING ...
Page 163: ...MAIN 8 8 FAX3550 3650 8000P 8200P MFC4550 6550MC 7550MC MFC9000 9500 A ...
Page 185: ...D CONTROL PANEL 1 2 ...
Page 187: ...E POWER SUPPLY 120 V Low voltage power supply ...
Page 188: ...E POWER SUPPLY 200 240 V Low voltage power supply European versions ...
Page 189: ...E POWER SUPPLY 200 240 V Low voltage power supply Asian versions ...
Page 190: ...E POWER SUPPLY High voltage power supply ...
Page 191: ...Sept 98 5X52012 Printed in Japan ...