MX-M350N, MX-M350U, MX-M450N, MX-M450U (serv.man8). Trouble Codes - Sharp Copying Equipment Service Manual (repair manual). Page 2

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MX-M350/M450 N/U  TROUBLE CODES  11 - 2
F1
36 Console finisher punch 
timing sensor trouble
With Console 
Finisher 
installed
PCU
37 Console finisher backup 
RAM trouble
With Console 
Finisher 
installed
PCU
38 Console finisher punch 
backup RAM trouble
With Console 
Finisher 
installed
PCU
39 Console finisher punch dust 
sensor trouble
With Console 
Finisher 
installed
PCU
40 Console finisher punch 
power interruption trouble
With Console 
Finisher 
installed
PCU
80 Finisher power abnormality
With Finisher 
installed
PCU
Mail-bin stacker power 
abnormality
With Mail bin 
stacker 
installed
PCU
81 Console finisher transport 
motor abnormality
With Console 
Finisher 
installed
PCU
87 Finisher staple rotation motor 
trouble
With Finisher 
installed
F2
00 Toner control sensor open/
sensor trouble
PCU
02 Toner supply abnormality
PCU
04 Improper cartridge (life cycle 
error, etc.)
PCU
05 CRUM error
PCU
06 CRUM ID error
PCU
39 Process thermistor trouble
PCU
F3
12 Machine no. 1 tray lift-up 
trouble
PCU
22 Machine tray 2 lift-up trouble Multi-
purpose tray
PCU
F6
00 Communication trouble (ICU 
detection) between ICU and 
FAX
When the 
Fax board is 
installed
ICU
01 FAX expansion flash memory 
abnormality (ICU detection)
When the 
Fax board is 
installed
ICU
04 FAX modem operation 
abnormality
When the 
Fax board is 
installed
FAX
20 FAX write protect cancel
When the 
Fax board is 
installed
FAX
21 Combination abnormality of 
the TEL/LIU PWB and the 
FAX soft switch
When the 
Fax board is 
installed
FAX
97 FAX-BOX skating trouble
When the 
Fax board is 
installed
FAX
98 Combination error of the 
FAX-BOX destination 
information and the machine 
destination information
When the 
Fax board is 
installed
FAX
F7
01 FAX board EEPROM read/
write error
When the 
Fax board is 
installed
FAX
H2
00 Thermistor open (HL1)
PCU
01 Thermistor open (HL2)
PCU
Trouble 
codes
Contents
Remark
Trouble 
detection
H3
00 Fusing section high 

temperature trouble (HL1)
PCU
01 Fusing section high 

temperature trouble (HL2)
PCU
H4
00 Fusing section low 

temperature trouble (HL1)
PCU
01 Fusing section low 

temperature trouble (HL2)
PCU
H5
01 5-time continuous POD1 not-
reaching jam detection
PCU
L1
00 Scanner feed trouble
When the 
scanner is 
installed
SCANNER
L3
00 Scanner return trouble
When the 
scanner is 
installed
SCANNER
L4
01 Main motor lock detection
PCU
02 Drum motor lock detection
PCU
30 Controller fan motor lock 
detection
L6
10 Polygon motor lock detection
PCU
L8
01 No fullwave signal
PCU
02 Full wave signal width 
abnormality
PCU
U1
01 FAX battery abnormality
With FAX 
board 
installed
Controller
02 RTC read abnormality 
(common with FAX, on ICU 
PWB)
When the 
Fax board is 
installed
ICU
U2
00 EEPROM read/write error 
(ICU)
Controller
11 Counter check sum error 
(ICU)
Controller
12 Adjustment value check sum 
error (ICU)
Controller
22 SRAM memory check sum 
error (ICU)
ICU
23 SRAM memory individual 
data check sum error (ICU)
50 HD section individual data 
check sum error (ICU)
80 EEPROM read/write error 
(Scanner)
When the 
scanner is 
installed
SCANNER
81 Memory check sum error 
(Scanner)
When the 
scanner is 
installed
SCANNER
90 EEPROM read/write error 
(PCU)
PCU
91 Memory check sum error 
(PCU)
PCU
U6
00 Desk/LCC communication 
trouble
With Paper 
feed desk 
installed
PCU
01 Desk/LCC No. 1 tray lift-up 
trouble
With Paper 
feed desk 
installed
PCU
02 Desk No. 2 tray/LCC1 lift-up 
trouble
With Paper 
feed desk 
installed
PCU
03 Desk No. 3 tray/LCC2 lift-up 
trouble
With Paper 
feed desk 
installed
PCU
10 Desk/LCC transport motor 
trouble
With Paper 
feed desk 
installed
PCU
Trouble 
codes
Contents
Remark
Trouble 
detection
Display
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