Brother International MFC 8500 Service Manual - Page 139

[ 2 ] Error codes shown in the \, Engine PCB error. - error 71

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Page 139 highlights

[ 2 ] Error codes shown in the "MACHINE ERROR X X " message Error Code X X (Hex.) ( 71 ( 72 ( 73 ( 74 ( 75 ( 76 ( 77 ( 78 ( 79 ( 7A ( 7B ( 7C ( 7D ( 80 ( 82 ( 83 ( 84 ( 85 ( 86 ( 88 ( A1 ( A2 ( A3 ( A4 Error factor Polygon motor does not synchronize with the reference clock. ) Cannot detect Beam Detect signal. ) No toner cartridge loaded. ) Toner empty. ) In-casing temperature error. ) Heater harness disconnected or broken. Or heater thermistor harness disconnected or broken when the power is turned on, the front cover is opened and closed, or the machine exits from the sleep mode. ) Power turned off and on at the occurrence of error 76 or 78. ) Heater thermistor short-circuited. Or heater thermistor harness disconnected or broken when the machine is on standby. ) In-casing temperature sensor harness disconnected or broken. ) Main motor does not synchronize with the reference clock. ) ASIC error on the main PCB. ) Engine PCB error. ) Abnormal discharge of the corona wire detected by the toner sensor. ) Paper size setting error. ) Paper feeding error. ) Paper jam. The registration sensor, 2nd registration sensor, and/or manual insertion sensor remains ON.) Paper jam. The paper ejection sensor remains ON. ) No paper cassette loaded. ) No 2nd paper cassette loaded. ) Paper jam. Even after the registration sensor has gone OFF, the paper ejection sensor still stays OFF.) Front cover opened. ) Document too long to scan. ) Document not detected by the document rear sensor. ) 50% or more faulty of white level data. ) Error codes in parentheses do not appear in the "MACHINE ERROR X X", since those errors are displayed as messages described in "[ 1 ] Error messages on the LCD." In the maintenance mode (Function code 82), those error codes may be displayed. VI - 5

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VI
- 5
[ 2 ]
Error codes shown in the "MACHINE ERROR
X X
" message
Error Code
X X
(Hex.)
Error factor
( 71
Polygon motor does not synchronize with the reference clock. )
( 72
Cannot detect Beam Detect signal. )
( 73
No toner cartridge loaded. )
( 74
Toner empty. )
( 75
In-casing temperature error. )
( 76
Heater harness disconnected or broken. Or heater thermistor harness
disconnected or broken when the power is turned on, the front cover is
opened and closed, or the machine exits from the sleep mode. )
( 77
Power turned off and on at the occurrence of error 76 or 78. )
( 78
Heater thermistor short-circuited. Or heater thermistor harness disconnected
or broken when the machine is on standby. )
( 79
In-casing temperature sensor harness disconnected or broken. )
( 7A
Main motor does not synchronize with the reference clock. )
( 7B
ASIC error on the main PCB. )
( 7C
Engine PCB error. )
( 7D
Abnormal discharge of the corona wire detected by the toner sensor. )
( 80
Paper size setting error. )
( 82
Paper feeding error. )
( 83
Paper jam.
The registration sensor, 2nd registration sensor, and/or manual
insertion sensor remains ON.)
( 84
Paper jam.
The paper ejection sensor remains ON. )
( 85
No paper cassette loaded. )
( 86
No 2nd paper cassette loaded. )
( 88
Paper jam.
Even after the registration sensor has gone OFF, the paper
ejection sensor still stays OFF.)
( A1
Front cover opened. )
( A2
Document too long to scan. )
( A3
Document not detected by the document rear sensor. )
( A4
50% or more faulty of white level data. )
Error codes in parentheses do not appear in the "MACHINE ERROR X X
", since those errors are
displayed as messages described in "[ 1 ] Error messages on the LCD."
In the maintenance mode
(Function code 82), those error codes may be displayed.