OKI C3530

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

Confirmation Items	Confirmation Tasks	Action at NG
Check paper-feeding route condition
Paper-feeding route inside the multipurpose tray	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 2 and WR sensor.	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 2 and WR sensor	Check the following signals of FSNS connector of PU board (M32 PCB). 2pin: WR sensor 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. Confirmation Tasks

Paper jam occurred immediately after paper feeding. (Multipurpose tray)

Confirmation Items	Confirmation Tasks	Action at NG
Check paper-feeding route condition
Paper-feeding route inside the multipurpose tray	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 2 and WR sensor.	Check whether there is something abnormal about the form of sensor lever and its movement.	Replace the sensor lever with a new one.
Front cover	Check whether the left and right lock of front cover has been locked normally.Confirm both right and left locks of the front cover work well.	Replace the front unit with a new one.
Check the motor operation
Paper feed motor	By using the switch scanning 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 data on the cable side. SEVERAL MW Between 1pin-FG SEVERAL MW Between 2pin-FG SEVERAL MW Between 3pin-FG SEVERAL MW Between 4pin-FG	Replace the main board (M32 PCB) with a new one.
Check the connection
Paper feed motor cable	Check the cable connection.By visual inspection, check whether incompletely connection and oblique insertion of HOP connector of main board (M32 PCB) 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 side. 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 3.5W or 4.4W respectively.	Replace the paper feed motor with a new one.