Verifying the Reset
After the printer finishes warming up, check that the status LED is solid green and the Replace TR. Roller message no longer appears on the display.
To confirm the counter returned to zero:
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Press Menu on the control panel.
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Use the arrow keys to select System Setup > Report > Supplies Info (or re-enter Tech Menu > Maintenance Counts > View Counts).
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Verify that the Transfer Roller page count reads
0(or reflects only the test page just printed) and run a test print to confirm dark, uniform toner transfer across the page.
Troubleshooting Persistent Errors After Resetting
If the warning returns or print quality issues remain after completing the reset, match the symptom below to its mechanical or electrical cause:
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The “Replace TR. Roller” message stays on the screen after rebooting: You may have viewed the counter under
View Countsrather than resetting it underClear Counts, or cleared a different component such asFuserorDeveloper. Re-enterTech Menu>Maintenance Counts>Clear Counts, authenticate with the passcode, selectTransfer Roller, and press OK to confirm. -
Error
#C9-2220(“Install TR roller again”) appears immediately: The printer detects an open circuit or abnormal resistance across the transfer roller bias path. Power off the printer, open the right-side door, and verify that both ends of the transfer roller shaft are snapped completely into their holders. Check that the metal contact spring under the conductive bearing is clean of compacted toner and makes firm contact with the roller bushing. If a brand-new roller is seated properly andC9-2220persists, the High Voltage Power Supply board (SAM-JC44-00229A) requires diagnostic testing or replacement. -
Prints are pale, faded on one side, or show ghostly background haze: If you performed an HP M436 TR roller reset without replacing the physical roller, the conductive foam has likely lost its ability to hold an even electrostatic charge. Install a new
W7U01-67901Transfer Roller Kit. If a new roller is already installed, verify that one end of the roller did not pop out of its spring mount when the right cover was closed.
