Lexmark T420 Printer Service Repair Manual

Service Repair Manuals of Lexmark-T420 Printer is a handbook published by Lexmark manufacturer or a specialized publishing company that contains instructions and specifications for the maintenance, repair, and how to fix all error of a specific Lexmark-T420 Printer. It may include Exploded Views, Parts List, System Diagram, Disassembly and Reassembly, Alignment, Troubleshooting guides. …
Service Repair Manuals of Lexmark-T420 Printer is often used for the Service Center of Lexmark.
Compatible Models : Lexmark T420.

Lexmark-T420 Service Repair Manual
Lexmark-T420 Service Repair Manual
Lexmark-T420 Service Repair Manual contains instructions, specifications for the maintenance, repair ,Exploded Views, Parts List, System Diagram, Disassembly and Reassembly, Troubleshooting guides.

You can do with Lexmark-T420 Service Manual :

1.1 Lexmark-T420 Service Manual guide you from basic to advanced usage it.
1.2 Grasp how to operate Lexmark-T420 Printer.

Grasp how to operate Lexmark-T420 Printer

1.3 Fix most of the errors of the Lexmark-T420 Printer:
When the printer experiences an error, the control panel will indicate an error message with the indicator lights and the SMART PANEL Lexmark-T420 program window will display to show the printer’s status or errors. Find the light pattern below that matches the printer light pattern and follow the solutions to clear the error.

Demo : how to fix error messages cause by Lexmark-T420 :

How to fix error Lexmark-T420

Error code Lexmark-T420

Error messages in Service Repair Manual Lexmark-T420 :

The printer does not print.
Paper does not feed into the printer.
A print job is extremely slow.
Half the page is blank.
The paper keeps jamming, Paper Jam inside, Paper Jam Outside…
The printer prints, but the text is wrong, garbled, or incomplete.
Pages print, but are blank.
The print quality of photos is not good. Images are not clear.
Your printer has an odd smell during initial use.

Demo : How to fix Paper Jam Lexmark-T420 Printer

Error code in Service Repair Manual Lexmark-T420 :

90x: SMART PANEL Lexmark-T420:Software Error.
91x: SMART PANEL Lexmark-T420:Transfer Roll Error.
92x: SMART PANEL Lexmark-T420:Fuser/Toner Sensor Error.
93x: SMART PANEL Lexmark-T420:Printhead / Transport Motor Error.
94x: SMART PANEL Lexmark-T420:Controller Card.
95x: SMART PANEL Lexmark-T420:NVRAM / ROM / NAND Error.
96x: SMART PANEL Lexmark-T420:RAM Memory Error.
97x: SMART PANEL Lexmark-T420:Network Error.
98x: SMART PANEL Lexmark-T420:Paper Port Communication Error.
906: SMART PANEL Lexmark-T420:RIP interface driver error.
905: SMART PANEL Lexmark-T420:Interface violation by paper port device.
904: SMART PANEL Lexmark-T420:Interface violation by RIP.
903: SMART PANEL Lexmark-T420:Paper port link drive error.
902: SMART PANEL Lexmark-T420:General engine software error.
925: SMART PANEL Lexmark-T420:Incorrect fuser lamp installed.
924: SMART PANEL Lexmark-T420:Open circuit in thermistor path.
923: SMART PANEL Lexmark-T420:Fuser too hot during printing or idle.
922: SMART PANEL Lexmark-T420:Fuser failed to reach standby temperature.
921: SMART PANEL Lexmark-T420:Fuser below standby temperature at idle.
920: SMART PANEL Lexmark-T420:Fuser below temperature when printing.
935: SMART PANEL Lexmark-T420:Mirror motor not at operating speed.
934: SMART PANEL Lexmark-T420:Mirror motor lost lock.
933: SMART PANEL Lexmark-T420:Mirror motor locked, no hsync received.
932: SMART PANEL Lexmark-T420:Printhead – lost hsync.
931: SMART PANEL Lexmark-T420:Printhead – no first hsync.
930: SMART PANEL Lexmark-T420:Printhead – wrong printhead installed.
937: SMART PANEL Lexmark-T420:Transport motor lost lock.
936: SMART PANEL Lexmark-T420:Transport motor initial lock failure.

1.4 Fluent Disassembly and Reassembly Lexmark-T420 Printer.
1.5 Diagnostic all errors are generated by Lexmark-T420 Printer.
1.6 How to refill toner Lexmark-T420.
1.7 How to update firmware fix Lexmark-T420.
1.8 How to fix all error cause by toner cartridge Lexmark-T420: toner cartridge not competition, install toner cartridge, toner exhausted, toner low, toner empty…
1.9 How to fix all fusser error, LSU error Lexmark-T420.
2.0 How to fix main board error, formater board error Lexmark-T420.
2.1 How to troubleshooting printer problem with low quality page Lexmark-T420.
2.2 How to fix error : door open close it Lexmark-T420.
2.3 How to fix : error status(red light status, red light blinking…) Lexmark-T420 (when printing).
2.4 How to fix error about imaging unit: empty image, imaging unit is not installed…Lexmark-T420.
2.5 How to fix paper jam inside, outside, output…Lexmark-T420.
2.6 How to login maintenance mode Lexmark-T420.
2.7 How to fix sensor failure, turn off then on…Lexmark-T420.

Lexmark-T420 Printer Service Manual covers following topics:


– Precautions Lexmark-T420.
– Product Specification Lexmark-T420.
– System Overview Lexmark-T420.
– S/W Structure and Descriptions Lexmark-T420.
– Disassembly and Reassembly Lexmark-T420.
– Alignment and Adjustments Lexmark-T420.
– Troubleshooting Lexmark-T420.
– Exploded Views & Parts List Lexmark-T420.

– Block diagram,schematic Lexmark-T420.

Block Diagram Lexmark-T420

Block Diagram Lexmark-T420

– Connection Diagram



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