Printhead Removal, Installation, And Adjustment - Lexmark C734dn Service Manual

Printhead removal, installation, and adjustment

See
"Printhead assembly" on page 7-9
Service tip—Testing the new printhead
See
"Printhead verification" on page 3-35
before installing the new printhead. If the new printhead also fails, the existing printhead is probably
working properly, so the system board is probably the failing component.
Printhead removal
Turn the printer off.
1.
Disconnect the power cord from the electrical outlet and from the printer.
2.
3. Remove the paper tray.
Open the front access door.
4.
5. Open the top access door.
Remove the fuser.
6.
Remove the transfer module and photoconductor units.
7.
Disconnect the transfer module cable (A).
a.
Press the two tabs (B) to release the front access cover assembly.
b.
Press the two tabs (C) on either side of the transfer module, and lift out the transfer module.
c.
Note: Leave the photoconductor units on the transport belt when removing.
Warning: To avoid damaging the photoconductor drum, place the transfer module with the
photoconductor units on a clean surface. Never expose the photoconductor units to light for a prolonged
for the part number.
for quick way to verify that the existing printhead is failing
5026
Repair information
4-135
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