SC Code Descriptions
SM 4-9
B286/B289
Tr
ouble
-
shooting
546 A Fusing
Temperature
Errors
The machine detected that the fusing
temperature was fluctuating out of
range for more than 60 sec. (7
readings detected temperature
fluctuating more than ±20
o
C)
!
Thermistor connection loose,
disconnected, defective
!
Hot roller thermistor not positioned
correctly
!
Fusing lamp connections loose,
disconnected, defective
!
MCU
defective
547 D Zero-Cross Signal Errors
This error occurs if the machine fails
to detect 50/60 Hz on the power
supply line.
Note
: The zero-cross signal from the
ac power supply generates a trigger
pulse to control the power supply of
power. (It automatically detects 50/60
Hz.)
!
Check that the frequency of the
power supply to the machine is
correct
!
PSU
defective
!
MCU
defective
551 A Pressure roller center thermistor error 1
During the hot roller temperature
control sequence, or while the hot
roller and pressure roller were
rotating, the pressure roller center
thermistor measured a value
higher than 3.3V 10 consecutive
times at 600 ms intervals.
!
Pressure roller center thermistor not
positioned properly
!
Pressure roller center thermistor
connector loose, broken, defective
!
Pressure roller center thermistor
defective
!
MCU
defective
Summary of Contents for B286
Page 1: ...B286 B289 SERVICE MANUAL 003165MIU...
Page 2: ......
Page 3: ...B286 B289 SERVICE MANUAL...
Page 4: ......
Page 5: ...B286 B289 SERVICE MANUAL 003165MIU...
Page 6: ......
Page 8: ......
Page 10: ......
Page 12: ......
Page 27: ......
Page 29: ......
Page 34: ......
Page 35: ...INSTALLATION...
Page 36: ......
Page 117: ...PREVENTIVE MAINTENANCE...
Page 118: ......
Page 127: ...REPLACEMENT AND ADJUSTMENT...
Page 128: ......
Page 186: ...Boards B286 B289 3 58 SM 9 Remove the shield cover A x12 10 Remove A MCU x4 x1 B IPU x4...
Page 198: ...Others B286 B289 3 70 SM 4 Remove the cooling fan D x 1 x 3...
Page 216: ......
Page 217: ...TROUBLESHOOTING...
Page 218: ......
Page 269: ...SERVICE TABLES...
Page 270: ......
Page 507: ...DETAILS...
Page 508: ......
Page 511: ...Overview SM 6 3 B286 B289 Details 6 1 2 MECHANICAL COMPONENT LAYOUT...
Page 526: ...Image Processing B286 B289 6 18 SM Text Mode...
Page 529: ...Image Processing SM 6 21 B286 B289 Details Patched Original Mode...
Page 530: ...Image Processing B286 B289 6 22 SM Generation Mode...
Page 552: ...Development B286 B289 6 44 SM Toner End Recovery Flow Chart...
Page 613: ...SPECIFICATIONS...
Page 614: ......