MX-6240N, MX-7040N (serv.man26). Section 7 Troubleshooting - Updated November 2012 - Sharp Copying Equipment Service Manual (repair manual). Page 8

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MX-7040N  TROUBLESHOOTING  7 – 8
F1
15
Finisher paper exit tray lift operation trouble (FTLM)
PCU
19
Finisher alignment operation trouble F (FFJM)
PCU
20
Finisher alignment operation trouble R (FRJM)
PCU
21
Abnormality of relay unit fan motor inside the machine (FDCM)
PCU
22
Finisher rear edge assist motor trouble (FASM)
PCU
23
Finisher shutter trouble (FSHC)
PCU
30
Finisher - Saddle unit communication trouble
PCU
31
Finisher saddle motor trouble (Saddle stitch finisher) (FSFOM)
PCU
32
Communication error between the finisher and the punch unit 
(Saddle stitch finisher)
PCU
33
Punch unit shift operation trouble (FPSM)
PCU
34
Punch operation trouble (FPNM)
PCU
37
Finisher data backup RAM error
PCU
38
Punch data backup RAM error
PCU
41
Saddle paper positioning operation trouble (FPPM)
PCU
42
Saddle guide motor trouble (FSGM)
PCU
43
Saddle alignment operation trouble (FSJM)
PCU
44
Saddle staple motor R trouble (FSRSTM)
PCU
45
Saddle staple trouble (FSFSTM)
PCU
46
Saddle pushing plate motor trouble (FSLGM)
PCU
50
Main unit - Finisher combination error
PCU
51
Saddle sensor connection trouble
PCU
52
Finisher micro switch trouble
PCU
60
Communication trouble between peripheral devices (Inserter detection)
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
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
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
Trouble 
code
Trouble content
Trouble 
detection Mechanism Option Electricity FAX Supply
Main 
code
Sub 
code
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