2.Precautions for Maintenance
WARNING
• Always remove the power plug from the wall outlet before starting machine disassembly. ...............
• Always follow the procedures for maintenance described in the service manual and other related
brochures. .......................................................................................................................................
• Under no circumstances attempt to bypass or disable safety features including safety mechanisms
and protective circuits. .....................................................................................................................
• Always use parts having the correct specifications. ..........................................................................
• Always use the thermostat or thermal fuse specified in the service manual or other related bro-
chure when replacing them. Using a piece of wire, for example, could lead to fire or other serious
accident. ..........................................................................................................................................
• When the service manual or other serious brochure specifies a distance or gap for installation of a
part, always use the correct scale and measure carefully. ................................................................
• Always check that the copier is correctly connected to an outlet with a ground connection. .............
• Check that the power cable covering is free of damage. Check that the power plug is dust-free. If it
is dirty, clean it to remove the risk of fire or electric shock. ..............................................................
• Never attempt to disassemble the optical unit in machines using lasers. Leaking laser light may
damage eyesight. ...........................................................................................................................
• Handle the charger sections with care. They are charged to high potentials and may cause electric
shock if handled improperly. ............................................................................................................
CAUTION
• Wear safe clothing. If wearing loose clothing or accessories such as ties, make sure they are
safely secured so they will not be caught in rotating sections. ..........................................................
• Use utmost caution when working on a powered machine. Keep away from chains and belts. ........
• Handle the fixing section with care to avoid burns as it can be extremely hot. ..................................
• Check that the fixing unit thermistor, heat and press rollers are clean. Dirt on them can cause
abnormally high temperatures. ........................................................................................................
Summary of Contents for DF-420
Page 3: ...Revision history Revision Date Replaced pages Remarks ...
Page 4: ...This page is intentionally left blank ...
Page 10: ...This page is intentionally left blank ...
Page 11: ...First Edition DP 420 ...
Page 17: ...3MX 1 1 4 This page is intentionally left blank ...
Page 21: ...3MX 1 2 4 This page is intentionally left blank ...
Page 65: ...3MX 1 5 10 This page is intentionally left blank ...
Page 69: ...3MX 2 1 4 This page is intentionally left blank ...
Page 82: ...First Edition PF 420 ...
Page 87: ...3MH 1 1 3 1 1 3 Machine cross section Figure 1 1 2 Machine cross section Paper path ...
Page 88: ...3MH 1 1 4 This page is intentionally left blank ...
Page 94: ...3MH 1 2 6 This page is intentionally left blank ...
Page 128: ...3MH 1 4 12 This page is intentionally left blank ...
Page 136: ...3MH 1 5 8 This page is intentionally left blank ...
Page 142: ...3MH 2 2 4 This page is intentionally left blank ...
Page 146: ...3MH 2 3 4 This page is intentionally left blank ...
Page 149: ...First Edition DF 420 ...
Page 151: ...3MJ This page is intentionally left blank ...
Page 155: ...3MJ 1 1 4 This page is intentionally left blank ...
Page 159: ...3MJ 1 2 4 3 Remove the tape from the process table Figure 1 2 4 Tape Process table ...
Page 175: ...3MJ 1 5 4 This page is intentionally left blank ...
Page 181: ...3MJ 2 1 6 This page is intentionally left blank ...
Page 185: ...3MJ 2 2 4 This page is intentionally left blank ...
Page 192: ...First Edition JS 420 ...
Page 194: ...3MK This page is intentionally left blank ...
Page 196: ...3MK 1 1 2 1 1 2 Parts names Figure 1 1 1 1 2 1 Job separator tray 2 LED ...
Page 197: ...3MK 1 1 3 1 1 3 Machine cross section Figure 1 1 2 Machine cross section Paper path ...
Page 198: ...3MK 1 1 4 This page is intentionally left blank ...
Page 212: ...3MK 2 2 2 This page is intentionally left blank ...
Page 215: ...First Edition FAX System R ...
Page 217: ...3MZ This page is intentionally left blank ...
Page 227: ...3MZ 1 2 4 This page is intentionally left blank ...
Page 285: ...3MZ 1 6 2 This page is intentionally left blank ...
Page 287: ...3MZ 2 1 2 This page is intentionally left blank ...
Page 293: ...3MZ 2 2 6 This page is intentionally left blank ...
Page 295: ...3MZ 2 3 2 This page is intentionally left blank ...
Page 296: ......