2-54
Service Manual
4060-xxx
Hot fuser service check
Error Code 923: Indicates the fuser is too hot during printing or when the printer is idle.
Error code 924: Indicates an open circuit has been detected in the fuser thermistor circuit.
Note: Check the fuser sub error codes to help diagnose between a 923 and 924 error.
CAUTION: The fuser may be hot, use caution before removing or servicing.
CAUTION: There is a danger from hazardous voltage in the area of the printer where you
are working. Unplug the printer before you begin, or use caution if the printer must receive
power in order to perform the task.
FRU
Action
1
Fuser cover assembly
(assembly includes
thermistor and thermal
fuses)
Check for damage to the thermistor assembly. If damage is found,
replace the fuser top cover assembly. If no damage is found, check
the resistance of the thermistor between pins J6-1 and J6-2 on the
cable.
• HOT < 10K ohms
• COLD = approximately 450K ohms
If the resistance is incorrect, replace the fuser top cover assembly. If
the resistance is correct, check each pin of J6 to ground. If there is
continuity, replace the fuser cover assembly. See
“Fuser cover
removal” on page 4-25
.
2
Fuser assembly
Check for continuity between J6-1 and J1-2 and between J6-2 and
J1-3. If incorrect, replace the fuser assembly. If correct, go to step 3.
3
Fuser to system board DC
cable
Check the continuity of the cable. If incorrect, replace the cable. If
correct, go to step 4.
4
System board
Measure the voltage on J14-3 on the system board. The voltage
should change from approxi2.5 V dc with the thermistor cold
to approxi1.6 V dc when the thermistor is hot. If incorrect,
replace the system board. If correct, go to step 5.
5
Fuser hot roll
Fuser hot roll bearings
Fuser backup roll bearings
Fuser backup roll
Fuser mechanical parts
Examine the fuser assembly for signs of overheating or damage.
Check the hot roll and backup roll for signs of excessive toner, label
glue, labels, or other contaminants. If problems are found, replace the
fuser assembly.
Summary of Contents for T630 - Printer - B/w
Page 13: ...Laser notices xiii 4060 xxx Japanese Laser Notice ...
Page 14: ...xiv Service Manual 4060 xxx Korean Laser Notice ...
Page 34: ...1 16 Service Manual 4060 xxx ...
Page 218: ...4 64 Service Manual 4060 xxx ...
Page 236: ...6 2 Service Manual 4060 xxx ...
Page 238: ...7 2 Service Manual 4060 xxx Assembly 1 Covers ...
Page 240: ...7 4 Service Manual 4060 xxx Assembly 2 Frame 1 5 2 1 3 4 3 4 8 6 7 ...
Page 252: ...7 16 Service Manual 4060 xxx Assembly 9 Paper feed alignment 3 2 1 4 ...
Page 258: ...7 22 Service Manual 4060 xxx Assembly 12 Drives Main drive and developer drive 3 2 4 1 7 6 5 ...
Page 260: ...7 24 Service Manual 4060 xxx Assembly 13 Hot roll fuser 3 7 5 2 6 4 1 5 8 7 9 ...
Page 262: ...7 26 Service Manual 4060 xxx Assembly 14 Transfer charging 3 2 4 1 5 6 7 9 10 8 ...
Page 264: ...7 28 Service Manual 4060 xxx Assembly 15 Electronics power supplies 3 7 5 2 6 4 1 ...
Page 266: ...7 30 Service Manual 4060 xxx Assembly 16 Electronics card assemblies 3 1 4 5 6 9 2 4 7 8 10 ...
Page 268: ...7 32 Service Manual 4060 xxx Assembly 17 Electronics shields ...
Page 270: ...7 34 Service Manual 4060 xxx Assembly 18 Cabling diagrams 1 3 1 2 4 5 6 7 8 7 4 ...
Page 272: ...7 36 Service Manual 4060 xxx Assembly 19 Cabling diagrams 2 HVPS LVPS 3 5 4 1 2 6 ...
Page 276: ...7 40 Service Manual 4060 xxx Assembly 21 250 sheet paper tray ...
Page 278: ...7 42 Service Manual 4060 xxx Assembly 21 cont 250 sheet paper tray ...
Page 280: ...7 44 Service Manual 4060 xxx Assembly 22 500 sheet paper tray ...
Page 282: ...7 46 Service Manual 4060 xxx Assembly 22 cont 500 sheet paper tray ...
Page 284: ...7 48 Service Manual 4060 xxx Assembly 23 Duplex option 1 ...
Page 286: ...7 50 Service Manual 4060 xxx Assembly 24 Envelope feeder 3 11 7 13 5 9 2 10 6 4 12 8 14 1 ...
Page 288: ...7 52 Service Manual 4060 xxx Assembly 25 Output expander ...
Page 290: ...7 54 Service Manual 4060 xxx Assembly 25 cont Output expander ...
Page 292: ...7 56 Service Manual 4060 xxx Assembly 26 High capacity output expander ...
Page 296: ...7 60 Service Manual 4060 xxx Assembly 27 5 bin mailbox ...
Page 298: ...7 62 Service Manual 4060 xxx Assembly 27 cont 5 bin mailbox ...
Page 300: ...7 64 Service Manual 4060 xxx Assembly 28 High capacity feeder 1 ...
Page 320: ...7 84 Service Manual 4060 xxx Assembly 38 StapleSmart finisher 4 1 ...
Page 344: ...I 20 Service Manual 4060 xxx ...
Page 345: ......