Sharp Mx 2300n Service Manual
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MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 12 E7-50 Engine connection trouble E7-55 PWB information sum error (Engine detection) E7-60 Controller connection trouble (Engine detection) E7-61 Controller connection trouble (Engine) E7-62 Controller connection trouble (Scanner) E7-65 PWB information sum error (Control- ler detection) E7-70 Scanner connection trouble E7-75 PWB information sum error (Scanner detection) E7-80 Communication trouble between the controller and the scanner Trouble content Unknown PWB identification information is detected in the PCU PWB. Section PCU Case 1 Cause A PWB which is incompatible with the machine specifications is connected. Check and remedy1) Replace the PCU PWB. 2) Replace the LSU PWB. Case 2 Cause A firmware which is incompatible with the machine specifications is used. Check and remedyCheck the kind and the version of the firmware. Trouble content EEPROM PWB information sum error Section PCU Case 1 Cause 1) EEPROM device error 2) EEPROM device contact failure 3) Device access error due to noises Check and remedyReplace the PCU PWB. Trouble content Unknown PWB kind information is detected in the MFPcnt PWB. A PWB/firmware which is not compatible with the machine specifications is connected. Section MFP Case 1 Cause Controller PWB trouble Check and remedyReplace the controller PWB. Case 2 Cause A firmware which is not compatible with the machine specifications is applied. Check and remedyCheck the kind and the version of the firmware. Trouble content MFPcnt PWB connection trouble Compatibility trouble between the controller and the engine Section MFP Case 1 Cause Combination trouble of the controller PWB and the engine Check and remedyCheck the controller PWB. Check the combination between the controller PWB and the engine. Trouble content Controller connection trouble Compatibility trouble between the controller and the scanners Section MFP Case 1 Cause Combination trouble between the controller PWB and the engine Check and remedyReplace the controller PWB. Check the combination between the controller PWB and the engine. Trouble content EEPROM PWB information sum error Section MFP Case 1 Cause 1) EEPROM device trouble 2) EEPROM device contact failure 3) Device access error due to noises Check and remedyReplace the MFPcnt PWB. Trouble content Unknown identification information is detected in the SCU PWB. Section SCU Case 1 Cause SCU PWB trouble Check and remedyReplace the SCU PWB. Case 2 Cause A firmware which is incompatible with the machine specifications is connected. Check and remedyCheck the kind and the version of the firmware. Trouble content EEPROM PWB information sum error Section SCU Case 1 Cause 1) EEPROM device trouble 2) EEPROM device contact failure 3) Device access error due to noises Check and remedyReplace the scanner control PWB. Trouble content Communication trouble between the MFP and the scanner MFP detection Communication establishment error/Framing/Parity/ Protocol error Section MFP Case 1 Cause SCU PWB connector connection trouble Check and remedyCheck the connector connection between the SCU PWB and the MFPcnt PWB. Case 2 Cause Harness trouble between the SCU PWB and the MFPcnt PWB Check and remedyCheck the harness between the SCU PWB and the MFPcnt PWB. Case 3 Cause Broken connector pin of the SCU PWB mother board Check and remedyCheck grounding of the machine.
MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 13 E7-90 Communication trouble between the controller and the engine EE-EC Auto developer adjustment trouble (The sample level for every rotation is other than 128 ± 10). EE-EL Auto developer adjustment trouble (overtoner error) EE-EU Auto development adjustment trouble (Under-toner abnormality) F1-00 Finisher communication trouble (Machine side detection) F1-02 Saddle finisher transport motor trou- ble F1-03 Finisher paddle motor trouble (MX- FNX2), finisher swing motor trouble (MX-FNX1) F1-08 Finisher stapler shift motor trouble F1-10 Finisher staple motor abnormality Trouble content Communication trouble between the MFP and the PCU (MFP detection) Communication establishment error/Framing/Parity/ Protocol error Section MFP Case 1 Cause PCU PWB connector connection trouble Check and remedyCheck the connector connection between the PCU PWB and the MFPcnt PWB. Case 2 Cause Harness trouble between the PCU PWB and the MFPcnt PWB Check and remedyCheck the harness between the PCU PWB and the MFPcnt PWB. Case 3 Cause Broken connector pin of the PCU PWB mother board Check and remedyCheck grounding of the machine. Trouble content Auto developer adjustment trouble (The sample level for every rotation is other than 128 ± 10.) Section PCU Case 1 Cause Toner density sensor trouble, charging voltage/ developing voltage trouble, toner density trouble, developing unit trouble, PCU PWB trouble Check and remedyUse SIM25-2 to execute the auto development adjustment. Trouble content The sample level is 76 or below, or the control voltage is 208V or above. Section PCU Case 1 Cause Toner density sensor trouble, charging voltage/ developing voltage trouble, toner density trouble, developing unit trouble, PCU PWB trouble Check and remedyUse SIM25-2 to execute the auto development adjustment. Trouble content The sample level is 178 or above, or the control voltage is 51V or below. Section PCU Case 1 Cause Toner density sensor trouble, charging voltage/ developing voltage trouble, toner density trouble, developing unit trouble, PCU PWB trouble Check and remedyUse SIM25-2 to execute the auto development adjustment.Trouble content Communication line test error when turning on the power or after canceling an exclusion simulation. Communication error with the finisher Section PCU Case 1 Cause Malfunction due to noises Check and remedyTurn OFF/ON the power to cancel. Case 2 Cause PCU finisher connector or harness connection error or disconnection Check and remedyCheck the connector and harness in the communication line. Case 3 Cause Finisher control PWB trouble Check and remedyReplace the finisher control PWB. Case 4 Cause Control PWB (PCU) trouble Check and remedyReplace the PCU PWB. Trouble content Transport drive motor trouble Section PCU Case 1 Cause Motor lock, motor RPM abnormality, motor overvoltage, saddle finisher control PWB trouble Check and remedyUse SIM3-3 to check the operation of the transport motor (FFM). Replace the finisher control PWB. Trouble content Paddle motor operation trouble (MX-FNX2) Swing motor operation trouble (MX-FNX1) Section PCU Case 1 Cause Motor lock, motor RPM abnormality, motor overvoltage, finisher control PWB trouble Check and remedyUse SIM3-3 to check the operation of the motor (FPM/ FSWM). Replace the finisher control PWB. Trouble content Stapler shift motor operation trouble Section PCU Case 1 Cause Motor lock, motor RPM abnormality, motor overvoltage, finisher control PWB trouble Check and remedyUse SIM3-3 to check the operation of the staple motor (FSM). Replace the finisher control PWB. Trouble content Staple operation trouble Section PCU Case 1 Cause Motor lock, motor RPM abnormality, motor overvoltage, saddle finisher control PWB trouble Check and remedyUse SIM3-3 to check the operation of the staple motor (FFSM). Replace the finisher control PWB.
MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 14 F1-11 Finisher bundle process motor abnormality F1-15 Finisher tray lift motor abnormality F1-19 Finisher pre-alignment motor abnor- mality F1-20 Finisher after-alignment motor abnor- mality F1-21 Finisher fan motor abnormality (MX- FNX1), Finisher interface fan motor abnormality (MX-FNX2) F1-31 Finisher folding sensor trouble (MX- FNX2) F1-32 Communication trouble between the finisher and the punch unit (MX-FN2) F1-33 Finisher punch shift motor trouble F1-34 Finisher punch motor trouble F1-35 Finisher punch side registration sen- sor trouble (MX-FNX2) Trouble content Bundle process motor trouble Section PCU Case 1 Cause Motor lock, motor RPM abnormality, motor overvoltage, finisher control PWB trouble (MX-FNX2) Check and remedyUse SIM3-3 to check the operation of the bundle process motor (FAM). Replace the finisher control PWB. Trouble content Lift motor trouble Section PCU Case 1 Cause Motor lock, motor RPM abnormality, motor overvoltage, finisher control PWB trouble Check and remedyUse SIM3-3 to check the operation of the tray lift motor (FLM/FTLM). Replace the finisher control PWB. Trouble content Pre-alignment motor trouble Section PCU Case 1 Cause Motor lock, motor RPM abnormality, motor overvoltage, saddle finisher control PWB trouble Check and remedyUse SIM3-3 to check the operation of the pre- alignment motor (FFJM). Replace the finisher control PWB. Trouble content After-alignment motor trouble Section PCU Case 1 Cause Motor lock, motor RPM abnormality, motor overvoltage, finisher control PWB trouble Check and remedyUse SIM3-3 to check the operation of the after- alignment motor (FRJM). Replace the finisher control PWB. Trouble content Cooling fan motor trouble (MX-FNX1) Interface transport fan motor trouble (MX-FNX2) Section PCU Case 1 Cause Motor lock, motor RPM abnormality, motor overvoltage, finisher control PWB trouble Check and remedyUse SIM3-3 to check the operation of the fan motor (FFAM/FJFM). Replace the finisher control PWB. Trouble content Sensor input value abnormality Section PCU Case 1 Cause Sensor breakage, harness disconnection, finisher control PWB trouble (MX-FNX2) Check and remedyUse SIM3-2 to check the operation of the sensor (FFPD). Replace the finisher control PWB.Trouble content Finisher and punch unit communication trouble (MX- FNX2) Section PCU Case 1 Cause Malfunction due to noises Check and remedyCancel by turning OFF/ON the power. Case 2 Cause Connector/harness connection error or disconnection between the finisher and the punch unit Check and remedyCheck the connector and the harness in the communication line. Case 3 Cause Finisher control PWB trouble (MX-FNX2) Check and remedyReplace the finisher control PWB. Case 4 Cause Control PWB (PCU) trouble Check and remedyReplace the control PWB (PCU) trouble Trouble content Punch shift motor operation abnormality Section PCU Case 1 Cause Motor lock, motor RPM abnormality, motor overvoltage, finisher control PWB trouble, punch control PWB trouble (MX-FNX2) Check and remedyUse SIM3-3 to check the operation of the punch shift motor (FPSM). Replace the finisher punch unit (Replace the punch control PWB.). Trouble content Punch motor operation abnormality Section PCU Case 1 Cause Motor lock, motor RPM abnormality, motor overvoltage, finisher control PWB trouble, punch control PWB trouble (MX-FNX2) Check and remedyUse SIM3-3 to check the operation of the punch motor (FPNW). Replace the finisher punch unit (Replace the punch control PWB.). Trouble content Sensor input value abnormality Section PCU Case 1 Cause Sensor breakage, harness disconnection, saddle finisher control PWB trouble (MX-FNX2), punch control PWB trouble (MX-FNX2) Check and remedyUse SIM3-2 to check the operation of the punch section sensor (FPSHPD/FPSD1-4). Replace the finisher punch unit (Replace the punch control PWB.).
MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 15 F1-36 Finisher punch registration sensor trouble (MX-FNX2) F1-37 Finisher backup RAM trouble F1-38 Finisher punch backup RAM trouble (MX-FNX2) F1-39 Finisher punch dust sensor trouble (MX-FNX2) F1-40 Saddle finisher punch power interruption trouble (MX-FNX2) F1-50 Finisher incompatibility trouble F2-39 Process thermistor trouble F2-40 Toner empty sensor abnormality (BLACK) F2-41 Toner empty sensor abnormality (CYAN) Trouble content Sensor input value abnormality Section PCU Case 1 Cause Sensor breakage, harness disconnection, saddle finisher control PWB trouble (MX-FNX2), punch control PWB trouble (MX-FNX2) Check and remedyUse SIM3-2 to check the operation of the punch timing sensor (FPTD). Replace the finisher punch unit (Replace the punch control PWB.). Trouble content Backup RAM data garbled Section PCU Case 1 Cause Finisher control PWB trouble, malfunction due to electrical noises Check and remedyReplace the finisher control PWB. Trouble content Punch unit backup RAM data garbled Section PCU Case 1 Cause Punch control PWB trouble, malfunction due to electrical noises Check and remedyReplace the punch control PWB. Trouble content Punch dust sensor detection trouble Section PCU Case 1 Cause Sensor breakage, harness disconnection, finisher control PWB trouble (MX-FNX2), punch control PWB trouble (MX-FNX2) Check and remedyUse SIM3-2 to check the operation of the sensor punch dust sensor (FPDD). Replace the finisher control PWB or the punch control PWB. Trouble content When the punch unit power interruption is detected. Section PCU Case 1 Cause Harness disconnection, punch control PWB trouble Check and remedyUse SIM3-3 to check the operation punch motor (FPNW). Replace the finisher punch unit (Replace the punch control PWB.). Trouble content Detection of finisher incompatible with MX-2700**/ 2300** Section PCU Case 1 Cause Connection of the AR-F13, etc. which is incompatible with MX-2700**/2300** is detected. Check and remedyConnect the MX-FNX1/MX-FNX2. Trouble content Process thermistor open Section PCU Case 1 Cause Process thermistor harness connection trouble Check and remedyCheck the connection of the harness, connector of the process thermistor. Case 2 Cause Process thermistor trouble Check and remedyCheck the connection of the process thermistor. Case 3 Cause PCU PWB trouble Check and remedyCheck the PCU PWB. Trouble content Toner empty sensor output abnormality. Sample level 25 or less or 231 or above. Section PCU Case 1 Cause The connector is not installed. Check and remedyCheck the connection of the connector harness to the PCU PWB. Check the connection of the toner empty sensor. Case 2 Cause Connector harness trouble Check and remedyCheck the harness disconnection. Case 3 Cause Cartridge trouble Check and remedyCheck the cartridge connection. Trouble content Toner empty sensor output abnormality. Sample level 25 or less or 231 or above. Section PCU Case 1 Cause The connector is not installed. Check and remedyCheck the connection of the connector harness to the PCU PWB. Check the connection of the toner empty sensor. Case 2 Cause Connector harness trouble Check and remedyCheck the harness disconnection. Case 3 Cause Cartridge trouble Check and remedyCheck the cartridge connection.
MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 16 F2-42 Toner empty sensor abnormality (MAGENTA) F2-43 Toner empty sensor abnormality (YELLOW) F2-44 Black exclusive image density sensor trouble (Transfer belt surface reflection ratio abnormality) F2-45 Color exclusive image density sensor trouble (Calibration plate surface reflection ratio abnormality) F2-49 LSU thermistor trouble F2-50 K phase sensor sensing trouble Trouble content Toner empty sensor output abnormality. Sample level 25 or less or 231 or above. Section PCU Case 1 Cause The connector is not installed. Check and remedyCheck the connection of the connector harness to the PCU PWB. Check the connection of the toner empty sensor. Case 2 Cause Connector harness trouble Check and remedyCheck the harness disconnection. Case 3 Cause Cartridge trouble Check and remedyCheck the cartridge connection. Trouble content Toner empty sensor output abnormality. Sample level 25 or less or 231 or above. Section PCU Case 1 Cause The connector is not installed. Check and remedyCheck the connection of the connector harness to the PCU PWB. Check the connection of the toner empty sensor. Case 2 Cause Connector harness trouble Check and remedyCheck the harness disconnection. Case 3 Cause Cartridge trouble Check and remedyCheck the cartridge connection. Trouble content The transfer belt surface is scanned by the image density sensor before starting the process control, and adjust the sensor gain so that the output is kept at a certain level. However, the output is not within the specified range though the senor gain is adjusted. Section PCU Case 1 Cause Image density sensor trouble, harness connection trouble between PCU PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble, calibration plate solenoid operation trouble Check and remedyUse SIM44-2 to execute the process control sensor gain adjustment. If ERROR is displayed, check the sensor, the harness, the calibration plate solenoid operation for any trouble. If the adjustment is completed, check the transfer belt surface state. Trouble content The calibration plate surface is scanned by the image density sensor before starting the process control, and adjust the sensor gain so that the output is kept at a certain level. However, the output is not within the certain level though the senor gain is adjusted. Section PCU Case 1 Cause Image density sensor trouble, harness connection trouble between PCU PWB and the image density sensor, image density sensor dirt, calibration plate dirt, calibration plate solenoid operation trouble Check and remedyUse SIM44-2 to execute the process control gain adjustment. If ERROR is displayed, check the sensor and the harness. If the adjustment is completed, check the calibration plate solenoid operation. Trouble content The detection temperature is out of the range of 5°C to 55°C. Section PCU Case 1 Cause LSU thermistor harness connection trouble Check and remedyCheck the connection of the LSU thermistor harness and connector. If the trouble cannot be removed, replace the LSU thermistor or the PCU PWB. Case 2 Cause LSU thermistor trouble, PCU PWB trouble Check and remedyCheck the PCU PWB. If the trouble cannot be removed, replace the LSU thermistor or the PCU PWB. Trouble content Detection is made by interruption of light in the sensor section of the projection rib on the drum drive gear to control the BK drum phase. The detection signal cannot be acquired and phase control cannot be made. Section PCU Case 1 Cause Sensor connector connection trouble Check and remedyCheck the sensor connector connection. Case 2 Cause Dirt on the sensor light emitting section, or installation trouble Check and remedyCheck for dirt on the sensor or check the installation state. Case 3 Cause Drum drive gear upper rib breakage, sensor trouble Check and remedyIf there is no trouble in the rib, replace the sensor. (Use SIM30-1 DHPD_K to check interruption or transmission of light.)
MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 17 F2-51 CL phase sensor sensing trouble F2-58 Process humidity sensor trouble F2-64 Toner supply abnormality (BLACK) F2-65 Toner supply abnormality (CYAN) F2-66 Toner supply abnormality (MAGENTA) F2-67 Toner supply abnormality (YELLOW) F2-70 Toner cartridge improper cartridge detection (BLACK) Trouble content Detection is made by interruption of light in the sensor section of the projection rib on the drum drive gear to control the phases of all the color drums. The detection signal cannot be acquired and phase control cannot be made. Section PCU Case 1 Cause Sensor connector connection trouble Check and remedyCheck the sensor connector connection. Case 2 Cause Dirt on the sensor light emitting section, or installation trouble Check and remedyCheck for dirt on the sensor or check the installation state. Case 3 Cause Drum drive gear upper rib breakage, sensor trouble Check and remedyIf there is no trouble in the rib, replace the sensor. (Use SIM30-1 DHPD_CL to check interruption or transmission of light.) Trouble content Process humidity sensor open Section PCU Case 1 Cause Process humidity sensor harness connection trouble Check and remedyCheck the harness and connector connection of the process humidity sensor. Case 2 Cause Process humidity sensor trouble Check and remedyCheck the process humidity sensor. Case 3 Cause PCU PWB trouble Check and remedyCheck the PCU PWB. Trouble content Toner end with the remaining quantity of 50% or more. The toner supply time exceeds 3 times as much as the specified time. Section PCU Case 1 Cause Toner motor section connector harness trouble Check and remedyCheck the connector connection of the toner motor section. Check the connector harness (TM) connection to the main PWB. Case 2 Cause Toner motor and toner density sensor trouble Check and remedyCheck the toner density sensor output. (SIM25-1) Check that the toner transport pipe is not clogged between the toner cartridge and the developing unit. Replace the toner cartridge (CRUM) if necessary. If replacement of the toner cartridge (CRUM) does not clear the trouble, check the developing unit.Trouble content Toner end with the remaining quantity of 50% or more. The toner supply time exceeds 3 times as much as the specified time. Section PCU Case 1 Cause Toner motor section connector harness trouble Check and remedyCheck the connector connection of the toner motor section. Check the connector harness (TM) connection to the main PWB. Case 2 Cause Toner motor and toner density sensor trouble Check and remedyCheck the toner density sensor output. (SIM25-1) Check that the toner transport pipe is not clogged between the toner cartridge and the developing unit. Replace the toner cartridge (CRUM) if necessary. If replacement of the toner cartridge (CRUM) does not clear the trouble, check the developing unit. Trouble content Toner end with the remaining quantity of 50% or more. The toner supply time exceeds 3 times as much as the specified time. Section PCU Case 1 Cause Toner motor section connector harness trouble Check and remedyCheck the connector connection of the toner motor section. Check the connector harness (TM) connection to the main PWB. Case 2 Cause Toner motor and toner density sensor trouble Check and remedyCheck the toner density sensor output. (SIM25-1) Check that the toner transport pipe is not clogged between the toner cartridge and the developing unit. Replace the toner cartridge (CRUM) if necessary. If replacement of the toner cartridge (CRUM) does not clear the trouble, check the developing unit. Trouble content Toner end with the remaining quantity of 50% or more. The toner supply time exceeds 3 times as much as the specified time. Section PCU Case 1 Cause Toner motor section connector harness trouble Check and remedyCheck the connector connection of the toner motor section. Check the connector harness (TM) connection to the main PWB. Case 2 Cause Toner motor and toner density sensor trouble Check and remedyCheck the toner density sensor output. (SIM25-1) Check that the toner transport pipe is not clogged between the toner cartridge and the developing unit. Replace the toner cartridge (CRUM) if necessary. If replacement of the toner cartridge (CRUM) does not clear the trouble, check the developing unit. 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 remedyReplace the toner cartridge.
MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 18 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 remedyReplace 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 remedyReplace 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 remedyReplace 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 remedyCheck the connector and the harness between the PCU and the toner cartridge. Case 2 Cause CRUM trouble Check and remedyReplace the toner cartridge. Case 3 Cause Control PWB (PCU) trouble Check and remedyReplace 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 remedyCheck the connector and the harness between the PCU and the toner cartridge. Case 2 Cause CRUM trouble Check and remedyReplace the toner cartridge. Case 3 Cause Control PWB (PCU) trouble Check and remedyReplace 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 remedyCheck the connector and the harness between the PCU and the toner cartridge. Case 2 Cause CRUM trouble Check and remedyReplace the toner cartridge. Case 3 Cause Control PWB (PCU) trouble Check and remedyReplace 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 remedyCheck the connector and the harness between the PCU and the toner cartridge. Case 2 Cause CRUM trouble Check and remedyReplace the toner cartridge. Case 3 Cause Control PWB (PCU) trouble Check and remedyReplace the PCU PWB.
MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 19 F2-78 Registration exclusive image density sensor trouble (Transfer belt surface reflection ratio abnormality) F2-80 Half tone process control 1st patch reference value trouble (BLACK) F2-81 Half tone process control 1st patch reference value trouble (CYAN) F2-82 Half tone process control 1st patch reference value trouble (MAGENTA) F2-83 Half tone process control 1st patch reference value trouble (YELLOW) F2-84 Half tone process control 2nd patch reference value trouble (BLACK) Trouble content The transfer belt surface is scanned by the image density sensor before starting the registration, and adjust the sensor gain so that the output is kept at a certain level. However, the output is not within the specified range though the senor gain is adjusted. Section PCU Case 1 Cause Image density sensor trouble, harness connection trouble between PCU PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble, calibration plate solenoid operation trouble Check and remedyCheck the sensor and the harness. Check the calibration plate solenoid operation and the transfer belt surface state. If the trouble is not cleared, replace the image sensor exclusively used for registration, replace the transfer belt, replace the calibration plate, replace the solenoid, or replace the PCU PWB according to the check result. Trouble content The low-density rising point or the high-density saturation point cannot be calculated because of a calculation error in the primary approximation formula of the sensor output ratio for the LSU PWM value obtained from the first step patch print result when executing the half tone process control in BLACK. Section PCU Case 1 Cause Image density sensor trouble, harness connection trouble between PCU sub PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble Check and remedyUse SIM44-2 to execute the process control gain adjustment. If ERROR is displayed, check the sensor and the harness. If the adjustment is completed, check the drum surface state and the belt surface state. Trouble content The low-density rising point or the high-density saturation point cannot be calculated because of a calculation error in the primary approximation formula of the sensor output ratio for the LSU PWM value obtained from the first step patch print result when executing the half tone process control in CYAN. Section PCU Case 1 Cause Image density sensor trouble, harness connection trouble between PCU sub PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble Check and remedyUse SIM44-2 to execute the process control gain adjustment. If ERROR is displayed, check the sensor and the harness. If the adjustment is completed, check the drum surface state and the belt surface state. Trouble content The low-density rising point or the high-density saturation point cannot be calculated because of a calculation error in the primary approximation formula of the sensor output ratio for the LSU PWM value obtained from the first step patch print result when executing the half tone process control in MAGENTA. Section PCU Case 1 Cause Image density sensor trouble, harness connection trouble between PCU sub PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble Check and remedyUse SIM44-2 to execute the process control gain adjustment. If ERROR is displayed, check the sensor and the harness. If the adjustment is completed, check the drum surface state and the belt surface state. Trouble content The low-density rising point or the high-density saturation point cannot be calculated because of a calculation error in the primary approximation formula of the sensor output ratio for the LSU PWM value obtained from the first step patch print result when executing the half tone process control in YELLOW. Section PCU Case 1 Cause Image density sensor trouble, harness connection trouble between PCU sub PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble Check and remedyUse SIM44-2 to execute the process control gain adjustment. If ERROR is displayed, check the sensor and the harness. If the adjustment is completed, check the drum surface state and the belt surface state. Trouble content The low-density section output is greater than the middle-density section output when connecting the low-density section approximation formula and the middle-density section approximation formula (formula of the sensor output ratio for the LSU PWM value) from the second step patch print result when executing the half tone process control in BLACK. Section PCU Case 1 Cause Image density sensor trouble, harness connection trouble between PCU sub PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble, transfer belt cleaning trouble Check and remedyUse SIM44-2 to execute the process control gain adjustment. If ERROR is displayed, check the sensor and the harness. If the adjustment is completed, check the drum surface state and the belt surface state.
MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 20 F2-85 Half tone process control 2nd patch reference value trouble (CYAN) F2-86 Half tone process control 2nd patch reference value trouble (MAGENTA) F2-87 Half tone process control 2nd patch reference value trouble (YELLOW) F2-92 High-density process control density correction error (CYAN) F2-93 High-density process control density correction error (MAGENTA) F2-94 High-density process control density correction error (YELLOW) F3-12 Main unit tray 1 lift-up trouble Trouble content The low-density section output is greater than the middle-density section output when connecting the low-density section approximation formula and the middle-density section approximation formula (formula of the sensor output ratio for the LSU PWM value) from the second step patch print result when executing the half tone process control in CYAN. Section PCU Case 1 Cause Image density sensor trouble, harness connection trouble between PCU sub PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble Check and remedyUse SIM44-2 to execute the process control gain adjustment. If ERROR is displayed, check the sensor and the harness. If the adjustment is completed, check the drum surface state and the belt surface state. Trouble content The low-density section output is greater than the middle-density section output when connecting the low-density section approximation formula and the middle-density section approximation formula (formula of the sensor output ratio for the LSU PWM value) from the second step patch print result when executing the half tone process control in MAGENTA. Section PCU Case 1 Cause Image density sensor trouble, harness connection trouble between PCU sub PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble Check and remedyUse SIM44-2 to execute the process control gain adjustment. If ERROR is displayed, check the sensor and the harness. If the adjustment is completed, check the drum surface state and the belt surface state. Trouble content The low-density section output is greater than the middle-density section output when connecting the low-density section approximation formula and the middle-density section approximation formula (formula of the sensor output ratio for the LSU PWM value) from the second step patch print result when executing the half tone process control in YELLOW. Section PCU Case 1 Cause Image density sensor trouble, harness connection trouble between PCU sub PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble Check and remedyUse SIM44-2 to execute the process control gain adjustment. If ERROR is displayed, check the sensor and the harness. If the adjustment is completed, check the drum surface state and the belt surface state.Trouble content The patch density value is not in the range of the density correction reference density value (STD value) ±30% at the upper limit or the lower limit bias voltage when executing the high density process control. Section PCU Case 1 Cause Image density sensor trouble, harness connection trouble between PCU PWB-image density sensor, dirt on image density sensor, transfer belt cleaning trouble Check and remedy1) Use SIM44-2 to execute the process control sensor gain adjustment. 2) If an error occurs, check the sensors and the harnesses. 3) If the adjustment of 1) is completed, check the drum surface state, the belt surface state, etc. Trouble content The patch density value is not in the range of the density correction reference density value (STD value) ±30% at the upper limit or the lower limit bias voltage when executing the high density process control. Section PCU Case 1 Cause Image density sensor trouble, harness connection trouble between PCU PWB-image density sensor, dirt on image density sensor, transfer belt cleaning trouble Check and remedy1) Use SIM44-2 to execute the process control sensor gain adjustment. 2) If an error occurs, check the sensors and the harnesses. 3) If the adjustment of 1) is completed, check the drum surface state, the belt surface state, etc. Trouble content The patch density value is not in the range of the density correction reference density value (STD value) ±30% at the upper limit or the lower limit bias voltage when executing the high density process control. Section PCU Case 1 Cause Image density sensor trouble, harness connection trouble between PCU PWB-image density sensor, dirt on image density sensor, transfer belt cleaning trouble Check and remedy1) Use SIM44-2 to execute the process control sensor gain adjustment. 2) If an error occurs, check the sensors and the harnesses. 3) If the adjustment of 1) is completed, check the drum surface state, the belt surface state, etc. Trouble content LUD1 does not turn ON within the specified time. Section PCU Case 1 Cause LUD1 sensor trouble, harness connection trouble between PCU PWB, the lift-up unit, and the paper feed unit. Check and remedyCheck the harness and the connector of LUD1. Case 2 Cause Tray 1 lift-up motor trouble Check and remedyCheck the lift-up unit.
MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 21 F3-22 Main unit tray 2 lift-up trouble H2-00 Non-contact thermistor detection thermistor open (TH_UM_AD2) H2-01 Lower thermistor open (TH_LM) H2-02 Sub thermistor open (TH_US) H2-03 Non-contact thermistor compensation thermistor open (TH_UM_AD1) H3-00 Fusing section high temperature trouble (TH_UM) H3-01 Fusing section high temperature trou- ble (TH_LM) H3-02 Sub thermistor fusing section high temperature trouble (TH_US) Trouble content LUD2 does not turn ON within the specified time. Section PCU Case 1 Cause LUD2 sensor trouble, harness connection trouble between PCU PWB, the lift-up unit, and the paper feed unit. Check and remedyCheck the harness and the connector of LUD2. Case 2 Cause Tray 2 lift-up motor trouble Check and remedyCheck the lift-up unit. Trouble content Thermistor open Section PCU Case 1 Cause Thermistor trouble, control PWB trouble, fusing section connector connection trouble, AC power source trouble, fusing unit not-installed Check and remedyCheck the harness and the connector from the thermistor to the control PWB. Trouble content Thermistor open Section PCU Case 1 Cause Thermistor trouble, control PWB trouble, fusing section connector connection trouble, AC power source trouble, fusing unit not-installed Check and remedyCheck the harness and the connector from the thermistor to the control PWB. Trouble content Thermistor open Section PCU Case 1 Cause Thermistor trouble, control PWB trouble, fusing section connector connection trouble, AC power source trouble, fusing unit not-installed Check and remedyCheck the harness and the connector from the thermistor to the control PWB. Trouble content Thermistor open Section PCU Case 1 Cause Thermistor trouble, control PWB trouble, fusing section connector connection trouble, AC power source trouble Check and remedyCheck the harness and the connector from the thermistor to the control PWB. Trouble content The fusing temperature inside the PWB exceeds the specified level. Section PCU Case 1 Cause Thermistor trouble, control PWB trouble, fusing section connector connection error, AC power source trouble Check and remedy1) Use SIM5-2 to check blinking of the heater lamp. 2) If it blinks normally, check the thermistor and the harness. Check the control PWB thermistor input circuit section. 3) If the heater lamp keep lighting, check the AC PWB and the control PWB lamp control circuit. 4) Use SIM14 to cancel the trouble. Trouble content The fusing temperature inside the PWB exceeds the specified level. Section PCU Case 1 Cause Thermistor trouble, control PWB trouble, fusing section connector connection error, AC power source trouble Check and remedy1) Use SIM5-2 to check blinking of the heater lamp. 2) If it blinks normally, check the thermistor and the harness. Check the control PWB thermistor input circuit section. 3) If the heater lamp keep lighting, check the AC PWB and the control PWB lamp control circuit. 4) Use SIM14 to cancel the trouble. Trouble content The fusing temperature inside the PWB exceeds the specified level. Section PCU Case 1 Cause Thermistor trouble, control PWB trouble, fusing section connector connection error, AC power source trouble Check and remedy1) Use SIM5-2 to check blinking of the heater lamp. 2) If it blinks normally, check the thermistor and the harness. Check the control PWB thermistor input circuit section. 3) If the heater lamp keep lighting, check the AC PWB and the control PWB lamp control circuit. 4) Use SIM14 to cancel the trouble.