Sharp MX-6500N / MX-7500N (serv.man21) Service Manual ▷ View online
MX-7500N TROUBLESHOOTING 7 – 8
F0
82
Finisher lower tray fan abnormality (FNFAN104)
PCU
○
83
Finisher paper guide motor section abnormality (FNM120)
PCU
○
84
Finisher grip section abnormality (FNM117)
PCU
○
85
Booklet finisher detection trouble
PCU
○
86
Finisher discharged paper hold motor section abnormality (FNM114)
PCU
○
90
Communication trouble between the stacker second series and the
downstream units
downstream units
PCU
○
91
Stacker second series offset unit abnormality
PCU
○
92
Stacker second series front side jogger abnormality
PCU
○
93
Stacker second series rear side jogger abnormality
PCU
○
94
Stacker second series lead edge jogger abnormality
PCU
○
95
Stacker second series stack tray abnormality
PCU
○
F1
00
Finisher - PCU PWB communication error
PCU
○
21
Abnormality of relay unit fan motor inside the machine (FDCM)
PCU
○
50
Main unit - Finisher combination error
PCU
○
60
Communication trouble between peripheral devices (Inserter detection)
PCU
○
64
No. 1 pickup motor trouble
PCU
○
65
No. 2 pickup motor trouble
PCU
○
66
No. 1 lift motor trouble
PCU
○
67
No. 2 lift motor trouble
PCU
○
90
Communication trouble between the decurler and the downstream units.
PCU
○
96
Decurler transport motor abnormality (DCM100)
PCU
○
97
Decurler unit fan 1 (Upper cooling fan) abnormality (DCFAN100)
PCU
○
98
Decurler unit fan 2 (Lower cooling fan) abnormality (DCFAN103)
PCU
○
99
Decurler unit fan 3 (Transport motor cooling fan) abnormality (DCFAN101)
PCU
○
F2
22
Discharge lamp trouble (K)
PCU
○
23
Discharge lamp trouble (C)
PCU
○
24
Discharge lamp trouble (M)
PCU
○
25
Discharge lamp trouble (Y)
PCU
○
39
Process temperature sensor trouble
PCU
○
40
Toner density sensor trouble (K)
PCU
○
41
Toner density sensor trouble (C)
PCU
○
42
Toner density sensor trouble (M)
PCU
○
43
Toner density sensor trouble (Y)
PCU
○
45
Color image density sensor trouble
PCU
○
49
LSU thermistor trouble
PCU
○
50
K drum phase sensor trouble
PCU
○
51
CL drum phase sensor trouble (C)
PCU
○
52
CL drum phase sensor trouble (M)
PCU
○
53
CL drum phase sensor trouble (Y)
PCU
○
58
Temperature/humidity sensor trouble (HUD_M/TH_M)
PCU
○
64
Toner supply operation trouble (K)
PCU
○
65
Toner supply operation trouble (C)
PCU
○
66
Toner supply operation trouble (M)
PCU
○
67
Toner supply operation trouble (Y)
PCU
○
F2
70
Improper toner cartridge detection (K)
PCU
○
71
Improper toner cartridge detection (C)
PCU
○
72
Improper toner cartridge detection (M)
PCU
○
73
Improper toner cartridge detection (Y)
PCU
○
74
Toner cartridge CRUM error (K)
PCU
○
75
Toner cartridge CRUM error (C)
PCU
○
76
Toner cartridge CRUM error (M)
PCU
○
77
Toner cartridge CRUM error (Y)
PCU
○
78
Registration/BK image density sensor trouble
PCU
○
79
Temperature thermistor of transfer unit trouble
PCU
○
91
High density process control high voltage error (K)
PCU
○
92
High density process control high voltage error (C)
PCU
○
93
High density process control high voltage error (M)
PCU
○
94
High density process control high voltage error (Y)
PCU
○
A0
After-transfer discharge lamp open trouble (K)
PCU
○
A1
After-transfer discharge lamp open trouble (C)
PCU
○
A2
After-transfer discharge lamp open trouble (M)
PCU
○
A3
After-transfer discharge lamp open trouble (Y)
PCU
○
F3
12
Paper feed tray 1 lift operation trouble
PCU
○
22
Paper feed tray 2 lift operation trouble
PCU
○
32
Main body cassette 3 lift trouble
PCU
○
42
Main body cassette 4 lift trouble
PCU
○
FF
00
Double feed detection trouble (PCU)
PCU
○
Trouble code
Trouble content
Trouble
detection
Mechanism
Option
Electricity
FAX
Supply
Main
code
code
Sub
code
MX-7500N TROUBLESHOOTING 7 – 9
H2
00
Thermistor open trouble (TH_UM_AD2)
PCU
○
01
Non-contact thermistor lower main detection thermistor open
(TH_LM1_AD2)
(TH_LM1_AD2)
PCU
○
02
Non-contact thermistor upper sub detection thermistor open
(TH_US1_AD2)
(TH_US1_AD2)
PCU
○
03
Non-contact thermistor upper main compensation thermistor open
(TH_UM_CS)
(TH_UM_CS)
PCU
○
04
Non-contact thermistor lower main compensation thermistor open
(TH_LM1_AD1)
(TH_LM1_AD1)
PCU
○
05
Non-contact thermistor upper sub compensation thermistor open
(TH_US1_AD1)
(TH_US1_AD1)
PCU
○
06
Upper edge section thermistor open (TH_US2)
PCU
○
07
Lower edge section thermistor open (TH_LM2)
PCU
○
H3
00
Fusing section high temperature trouble (TH_UM)
PCU
○
01
Fusing section high temperature trouble (TH_LM)
PCU
○
02
Fusing section high temperature trouble (TH_US)
PCU
○
H4
00
Lower main thermistor differential input abnormality (TH_LM1)
PCU
○
01
Fusing section low temperature trouble (TH_LM)
PCU
○
02
Fusing section low temperature trouble (TH_US)
PCU
○
30
Upper main thermistor differential input abnormality (TH_UM)
PCU
○
31
Lower main thermistor differential input abnormality (TH_LM1)
PCU
○
32
Upper sub thermistor differential input abnormality (TH_US1)
PCU
○
H5
01
5 times continuous POD1 not-reach jam
PCU
○
H7
10
Recovery error from low fuser temp. (TH_UM_AD2)
PCU
○
11
Recovery error from low fuser temp. (TH_LM)
PCU
○
L1
00
Scanner feed trouble
SCU
○
L2
11
Lamp cooling fan motor trouble
SCU
○
L3
00
Scanner return trouble
SCU
○
L4
02
Paper feed motor trouble
PCU
○
03
Fusing motor trouble
PCU
○
06
Transfer unit lift trouble
PCU
○
07
Transfer belt motor trouble
PCU
○
08
Waste toner transport motor lock
PCU
○
16
Fusing pressure release trouble
PCU
○
17
Drum motor lock trouble (K)
PCU
○
L4
18
Drum motor lock trouble (C)
PCU
○
19
Drum motor lock trouble (M)
PCU
○
20
Drum motor lock trouble (Y)
PCU
○
25
2nd transfer belt motor trouble
PCU
○
28
Sub power source cooling fan motor
MFP
○
30
Controller fan motor
MFP
○
31
Paper exit cooling fan F trouble
PCU
○
32
Power source cooling fan 1 trouble
PCU
○
34
LSU cooling fan trouble
PCU
○
35
Paper exit exhaust fan trouble
PCU
○
36
Fusing cooling fan trouble
PCU
○
39
Machine ventilation fan (R)
PCU
○
40
Ozone fan motor 1 trouble
PCU
○
41
Ozone fan motor 2 trouble
PCU
○
42
Ozone fan motor 3 trouble
PCU
○
43
Paper exit cooling fan R trouble
PCU
○
44
Power source cooling fan 2 trouble
PCU
○
48
ADU transport cooling fan motor F trouble
PCU
○
49
ADU transport cooling fan motor R trouble
PCU
○
57
Toner bottle cooling fan motor trouble
PCU
○
60
Fusing pressure roller cooling fan motor F trouble
PCU
○
61
Fusing pressure roller cooling fan motor R trouble
PCU
○
63
2nd transfer belt skew correction motor trouble
PCU
○
L6
10
Polygon motor trouble
PCU
○
L8
01
Full wave signal detection error
PCU
○
02
Full wave signal error
PCU
○
11
AC Cord 2 (power for fusing) full wave not detected
PCU
○
12
AC Cord 2 (power for fusing) full wave signal width abnormality
PCU
○
20
Communication error of MFPC PWB/SCN mother board
MFP
○
PC
-
Personal counter not detected
MFP
○
U1
01
Battery trouble
MFP
○
Trouble code
Trouble content
Trouble
detection
Mechanism
Option
Electricity
FAX
Supply
Main
code
code
Sub
code
MX-7500N TROUBLESHOOTING 7 – 10
U2
00
MFP EEPROM read/write error
MFP
○
05
Erroneous detection of account management data
MFP
○
11
MFPC PWB EEPROM counter check sum error
MFP
○
30
MFPC PWB and PCU PWB manufacturing No. data inconsistency
MFP
○
40
SD card system storage data area error
MFP
○
41
HDD system storage data area error
MFP
○
42
Machine adjustment data (system storage data area) error
MFP
○
50
HDD user authentication data check sum error
MFP
○
60
Watermark check error
MFP
○
80
SCU PWB EEPROM read/write error
SCU
○
81
SCU PWB EEPROM check sum error
SCU
○
90
PCU PWB EEPROM read/write error
PCU
○
91
PCU PWB EEPROM check sum error
PCU
○
U5
00
Document feed unit communication error
SCU
○
16
Document feed unit fan trouble
SCU
○
30
Document feed unit tray lift up trouble
SCU
○
31
Document feed unit tray lift down trouble
SCU
○
U6
09
LCC lift motor trouble
PCU
○
20
LCC control PWB - PCU PWB communication error
PCU
○
21
LCC transport motor trouble
PCU
○
22
LCC 24V power abnormality
PCU
○
23
A3 LCC tray descending trouble (Reverse winding detection) (A3 LCC)
PCU
○
24
A3 LCC tray lock detection trouble
PCU
○
29
LCT1 lift trouble
PCU
○
33
LCT2 reverse winding detection trouble
PCU
○
34
LCT2 lock detection trouble
PCU
○
39
LCT2 lift trouble
PCU
○
43
LCT3 reverse winding detection trouble
PCU
○
44
LCT3 lock detection trouble
PCU
○
49
LCT3 lift trouble
PCU
○
51
LCC - Main unit combination trouble
PCU
○
53
Communication trouble between LCT’s
PCU
○
54
Option installation combination trouble
PCU
○
63
Manual feed tray descending trouble
PCU
○
68
Manual feed tray paper feed position abnormality
PCU
○
69
Manual feed tray lift trouble
PCU
○
73
LCT4 reverse winding detection trouble
PCU
○
74
LCT4 lock detection trouble
PCU
○
79
LCT4 lift trouble
PCU
○
80
Relay unit transport motor trouble
PCU
○
81
Power unit cooling fan motor trouble
PCU
○
82
EEPROM trouble
PCU
○
83
Room temperature thermistor breakdown
PCU
○
84
Room humidity thermistor breakdown
PCU
○
85
Transport motor 1 trouble (2 series)
PCU
○
86
24V power trouble (2 series)
PCU
○
87
Power unit cooling fan motor trouble (2 series)
PCU
○
88
EEPROM trouble (2 series)
PCU
○
89
Room temperature thermistor breakdown (2 series)
PCU
○
90
Room humidity thermistor breakdown (2 series)
PCU
○
U7
50
MFPC PWB - Vendor machine communication error
MFP
○
51
Vendor machine error
MFP
○
U9
01
Touch panel trouble
SCU
○
UC
02
CPT - ASIC error
SCU
○
12
CPT - ASIC abnormal trouble (DSPF detection)
SCU
○
20
DOCC ASIC error
SCU
○
30
Anti-copy MODULE trouble (DSPF detection)
SCU
○
Trouble code
Trouble content
Trouble
detection
Mechanism
Option
Electricity
FAX
Supply
Main
code
code
Sub
code
MX-7500N TROUBLESHOOTING 7 – 11
G. Details of error codes and countermeasures
A0-01
PCU PWB ROM error
A0-02
SCU PWB ROM error
A0-04
Scanner expansion PWB (ACU)
(ACRE) ROM error
(ACRE) ROM error
A0-10
Color profile error
UE
10
LCT1 suction fan motor trouble
PCU
○
11
LCT1 exhaust fan motor trouble
PCU
○
12
LCT1 warm air heater thermistor open
PCU
○
13
LCT1 warm air heater thermistor low temperature trouble
PCU
○
14
LCT1 warm air heater thermistor high temperature trouble
PCU
○
15
LCT1 warm air outlet port thermistor open
PCU
○
16
LCT1 warm air outlet port thermistor low temperature
PCU
○
17
LCT1 warm air outlet port thermistor high temperature
PCU
○
20
LCT2 suction fan motor trouble
PCU
○
21
LCT2 exhaust fan motor trouble
PCU
○
22
LCT2 warm air heater thermistor open
PCU
○
23
LCT2 warm air heater thermistor low temperature trouble
PCU
○
24
LCT2 warm air heater thermistor high temperature trouble
PCU
○
25
LCT2 warm air outlet port thermistor open
PCU
○
26
LCT2 warm air outlet port thermistor low temperature
PCU
○
27
LCT2 warm air outlet port thermistor high temperature
PCU
○
30
LCT3 suction fan motor trouble
PCU
○
31
LCT3 exhaust fan motor trouble
PCU
○
32
LCT3 warm air heater thermistor open
PCU
○
33
LCT3 warm air heater thermistor low temperature trouble
PCU
○
34
LCT3 warm air heater thermistor high temperature trouble
PCU
○
35
LCT3 warm air outlet port thermistor open
PCU
○
36
LCT3 warm air outlet port thermistor low temperature
PCU
○
37
LCT3 warm air outlet port thermistor high temperature
PCU
○
40
LCT4suction fan motor trouble
PCU
○
41
LCT4 exhaust fan motor trouble
PCU
○
42
LCT4 warm air heater thermistor open
PCU
○
43
LCT4 warm air heater thermistor low temperature trouble
PCU
○
44
LCT4 warm air heater thermistor high temperature trouble
PCU
○
45
LCT4 warm air outlet port thermistor open
PCU
○
46
LCT4 warm air outlet port thermistor low temperature
PCU
○
47
LCT4 warm air outlet port thermistor high temperature
PCU
○
Trouble code
Trouble content
Trouble
detection
Mechanism
Option
Electricity
FAX
Supply
Main
code
code
Sub
code
Detail
MFP
Cause
The firmware version-up is not completed properly by
interruption of the power during the version-up
operation, etc. PCU PWB trouble.
interruption of the power during the version-up
operation, etc. PCU PWB trouble.
Check & Remedy
Use SIM49-1 to perform the firmware version-up
procedure again.Replace the PCU PWB.
procedure again.Replace the PCU PWB.
Detail
MFP
Cause
The firmware version-up is not completed properly by
interruption of the power during the version-up
operation, etc. SCU PWB trouble.
interruption of the power during the version-up
operation, etc. SCU PWB trouble.
Check & Remedy
Use SIM49-1 to perform the firmware version-up
procedure again.
Replace the SCU PWB.
procedure again.
Replace the SCU PWB.
Trouble content
Detail
MFP
Cause
Scanner expansion PWB (ACU) (ACRE) ROM data
error.
An error occurs during firmware upgrading for some
reasons.
error.
An error occurs during firmware upgrading for some
reasons.
Check & Remedy
Perform firmware upgrading again.
Trouble content
Color profile error
Detail
MFP
Cause
The content of the color profile is abnormal.
Combination error between the MFPC PWB firmware
and the color profile
Combination error between the MFPC PWB firmware
and the color profile
Check & Remedy
Upgrade the firmware collectively.
Replace the MFPC PWB.
Replace the MFPC PWB.
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