MX-1800N (serv.man16). Section 8 - Self Diagnostics Trouble Codes - Sharp Copying Equipment Service Manual (repair manual). Page 16

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MX-1800N  SELF DIAG AND TROUBLE CODE  8 – 16
 
F2-70
Toner cartridge improper cartridge
detection (BLACK)
 
F2-71
Toner cartridge improper cartridge
detection (CYAN)
 
F2-72
Toner cartridge improper cartridge
detection (MAGENTA)
 
F2-73
Toner cartridge improper cartridge
detection (YELLOW)
 
F2-74
Toner cartridge CRUM error (BLACK)
 
F2-75
Toner cartridge CRUM error (CYAN)
 
F2-76
Toner cartridge CRUM error 
(MAGENTA)
 
F2-77
Toner cartridge CRUM error 
(YELLOW)
Trouble content
Improper data are detected in the CRUM contents 
when the normal CRUM of the cartridge is 
detected.
Section
PCU
Case 1
Cause
An improper cartridge is inserted. Toner cartridge 
trouble
Check and 
remedy
Replace the toner cartridge. 
Trouble content
Improper data are detected in the CRUM contents 
when the normal CRUM of the cartridge is 
detected.
Section
PCU
Case 1
Cause
An improper cartridge is inserted. Toner cartridge 
trouble
Check and 
remedy
Replace the toner cartridge. 
Trouble content
Improper data are detected in the CRUM contents 
when the normal CRUM of the cartridge is 
detected. 
Section
PCU
Case 1
Cause
An improper cartridge is inserted. Toner cartridge 
trouble
Check and 
remedy
Replace the toner cartridge. 
Trouble content
Improper data are detected in the CRUM contents 
when the normal CRUM of the cartridge is 
detected. 
Section
PCU
Case 1
Cause
An improper cartridge is inserted. Toner cartridge 
trouble
Check and 
remedy
Replace the toner cartridge.
Trouble content
CRUM cannot be read or written.
Section
PCU
Case 1
Cause
Connection trouble or disconnection of the 
connector and the harness between the PCU and 
the toner cartridge.
Check and 
remedy
Check the connector and the harness between the 
PCU and the toner cartridge.
Case 2
Cause
CRUM trouble
Check and 
remedy
Replace the toner cartridge.
Case 3
Cause
Control PWB (PCU) trouble
Check and 
remedy
Replace the PCU PWB.
Trouble content
CRUM cannot be read or written.
Section
PCU
Case 1
Cause
Connection trouble or disconnection of the 
connector and the harness between the PCU and 
the toner cartridge.
Check and 
remedy
Check the connector and the harness between the 
PCU and the toner cartridge.
Case 2
Cause
CRUM trouble
Check and 
remedy
Replace the toner cartridge.
Case 3
Cause
Control PWB (PCU) trouble
Check and 
remedy
Replace the PCU PWB.
Trouble content
CRUM cannot be read or written.
Section
PCU
Case 1
Cause
Connection trouble or disconnection of the 
connector and the harness between the PCU and 
the toner cartridge.
Check and 
remedy
Check the connector and the harness between the 
PCU and the toner cartridge.
Case 2
Cause
CRUM trouble
Check and 
remedy
Replace the toner cartridge.
Case 3
Cause
Control PWB (PCU) trouble
Check and 
remedy
Replace the PCU PWB.
Trouble content
CRUM cannot be read or written.
Section
PCU
Case 1
Cause
Connection trouble or disconnection of the 
connector and the harness between the PCU and 
the toner cartridge.
Check and 
remedy
Check the connector and the harness between the 
PCU and the toner cartridge.
Case 2
Cause
CRUM trouble
Check and 
remedy
Replace the toner cartridge.
Case 3
Cause
Control PWB (PCU) trouble
Check and 
remedy
Replace the PCU PWB.
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