OKI C3530

Paper jam occurred immediately after turning on the printer. (1st tray)

Confirmation Items	Confirmation Tasks	Action at NG
Check paper-feeding route condition
Paper-feeding route inside the front unit	Open the front cover, and check whether the paper jam occurred during the route.	Remove the jammed paper.
Check the mechanical parts' condition
Check the sensor lever of the entry sensor 1 and 2.	Check whether there is something abnormal about the form of sensor lever and its movement.	Replace the sensor lever with a new one.
Check the electrical parts' condition
Check the condition of sensor signal detection.	By using the switch scanning test function of the maintenance utility, check whether the sensor signal has been normally detected.	Replace the main board (M32 PCB) or front sensor board (MIP PCB) or the connecting cable with new one.
Check the output level of entry sensor 1 and 2.	Check the following signals of FSNS connector of main board (M32 PCB). 2pin: entry sensor 1 3pin: entry sensor 2 Operate and adjust the sensor lever in order to check the above signal level.	Replace the front sensor board (MIP PCB) with a new one.
Check the power supply of front sensor board (MIP PCB).	Check the power supply of 5V of CN connector of front sensor board (MIP PCB). 1pin: 5V power supply 5pin: 0VLConfirmation Items	Replace the connecting cable with a new one.

Paper jam occurred immediately after paper feeding. (1st tray)

Confirmation Items	Confirmation Tasks	Action at NG
Check paper- feeding route condition
Paper-feeding route inside the front unit	Check whether the paper jam occurred during the route.	Remove the jammed paper
Check the mechanical parts' condition
Check the sensor lever of the entry sensor 1 and 2.	Check whether there is something abnormal about the form of sensor lever and its movement.	Replace the sensor lever with a new one.
Check the motor operation
Paper feed motor	By using the motor clutch test function of the maintenance utility, check whether paper feed motor operates normally.	Replace the main board (M32 PCB) or paper feed motor with new one.
Paper feed motor driver	Pull the HOP connector of main board (M32 PCB) out, check the following resistance value on the cable side. SEVERAL MΩ Between 1pin-FG SEVERAL MΩ Between 2pin-FG SEVERAL MΩ Between 3pin-FG SEVERAL MΩ Between 4pin-FG	Replace the main board (M32 PCB) with a new one.
Check the connection
Check the cable connection.	By visual inspection, please check whether incompletely connection and oblique insertion of connector or defective cable assembly exists	Connect the cable normally.Replace the cable with a new one.
Paper feed motor cable	Check whether wire gnawing occurred during assembly of equipment. Pull the HOP connector of main board (M32 PCB) out, check the followings on the cable connector. Short circuit between 1pin-FG Short circuit between 2pin-FG Short circuit between 3pin-FG Short circuit between 4pin-FG	Replace the cable with a new one, and reassemble correctly.
Paper feed motor.	Pull the HOP connector of the main board (M32 PCB) out, check whether the resistance values between 1pin- 2pin and 3pin-4pin are about 3.5Wor 4.4Wrespectively on the cable side	Replace the paper feed motor with a new one.
Check the solenoid operation
Paper feed solenoid	By using the motor clutch test function of the maintenance utility, check whether paper feed solenoid operates normally.Remove the sheet metal of the right side in order to check whether the solenoid can be seen.	Replace the main board (M32 PCB) or paper feed solenoid with new one.
Paper feed solenoid	Check whether the parts that may disturb the operation of moving parts of the solenoid exist (cable etc).	Assemble normally.
Check the connection
Paper feed solenoid cable	Check the cable connection. By visual inspection, please check whether incompletely connection and oblique insertion of connector or defective cable assembly exists.	Connect the cable normally.Replace the cable with a new one.
Paper feed solenoid cable	Check whether wire gnawing occurred during assembly of equipment. Pull the HSOL connector of main board (M32 PCB) out, check the followings on the cable side. Short circuit between 1pin-FG Check whether the resistance value between 1pin-2pin is about 82W with pulling the HSOL connector out.	Replace the cable with a new one.Replace the solenoid ASSY with a new one, and reassemble correctly.