Toshiba MJ-1028 User Manual

MJ-1027/1028
Service Manual Addendum
Supplement to the Troubleshooting
Section
Copyright-2008 Toshiba America Business Solutions, Inc. (TABS). This publication contains proprietary and confidential
information retained for reference purpose by authorized TABS dealers. Unauthorized use of this information is prohibited.
TABS makes no express or implied warranty, including implied warranties of merchantability for a particular purpose, with regard
to this technical publication and disclaims any claim arising by reason of the possession or use thereof.

Toshiba MJ-1028 Specifications

General

PC Connection	USB
Max Printing Resolution (mono)	1200 x 1200 dpi
Max Printing Resolution (color)	4800 x 1200 dpi
Copy Resolution	600 x 600 dpi
Printing Technology	Inkjet
Functions	Copier, fax machine, printer, scanner
Media Types	Plain paper, Envelopes
Operating System Compatibility	Windows

Summary

EA20 Paper Transport Stop Jam

Escape Solenoid (SL6) Checks

Check for proper operation of the Escape Solenoid (SL6) and related linkage issues for EA20 jamming.

Buffer Sensor (PI14) Operation Check

Verify the proper return operation of the buffer sensor (PI14) to prevent EA20 jamming.

Feed Motor (M1/M8) Failure

Diagnose potential failure of first (M1) or second (M8) feed motors, often requiring replacement of both.

CB30 Tray Lift Abnormality

Intermittent CB30 Tray Lift Issue

Address intermittent CB30 bin lift motor errors linked to tight tie wraps on the harness, causing damage.

Constant CB30 Tray Lift Issue

Troubleshoot constant CB30 tray lift abnormalities by checking the tray lift motor and torque limiter.

CBE0 Paper Folding Motor Abnormality

CB90 Paper Pushing Plate Motor Abnormality

Pusher Plate Condition Check

Inspect the pusher plate for flatness and absence of kinks or bends in critical areas.

Pusher Plate Home Sensor (PI15S) Check

Clean and check the pusher plate home sensor (PI15S) for proper function.

Cam Assembly and Spring Check

Verify the condition of the cam assembly, spring attachment, and bushings.

Limitless Copies Modification

CB80 Backup RAM Abnormality (No Hole Punch)

Tray Height Adjustment for CB80

Perform Tray Height Adjustment as per the MJ1027/28 Service Manual page 6-1.

Alignment Position Adjustment for CB80

Perform Alignment Position Adjustment as per the MJ1027/28 Service Manual page 6-1.

CB80 Backup RAM Abnormality (With Hole Punch)

Sensor Output Adjustment

Perform sensor output adjustment for the puncher unit after component replacement.

Registering Number of Punch Holes

Register the attached puncher unit type for finisher identification.

Transmission Sensor Sensitivity Check

Check transmission sensor sensitivity to guide periodic maintenance cleaning.

Abnormal Noise when Exit Tray Lowers

CB10 Feed Motor Abnormality

Cam Shutter One-way Bearing Check

Check the one-way bearing in the cam shutter for slipping issues.

Safety Switch (MS3) Contact Check

Inspect Safety Switch (MS3) for proper actuator contact.

Intermittent Stapling Issues

Mis-Stapling Diagnosis

Paddles Condition Check

Check the stapling paddles for wear.

Paddle Solenoid (SL5) Operation Check

Verify Paddle Solenoid (SL5) operation and paddle rotation.

Board and Sensor Replacement Adjustments

Finisher Controller PCB Adjustments

Details adjustments for Finisher Controller PCB including height, alignment, staple position, and winding amount.

Height Sensor (PS1) Adjustments

Specific adjustments for the Height Sensor (PS1).

EEPROM (Q2) Adjustments

Specific adjustments for the EEPROM (Q2), including buffer roller winding amount.

Saddle Stitch Controller PCB Adjustments

Details adjustments for the Saddle Stitch Controller PCB.

Hole Punch Board Adjustments

Refer to item 7 for Hole Punch Board adjustments.