ProcedurePrint engineReplacement

Replace the Thermal print head unit

Swap the DryStar 5300's Thermal print head unit (spare part CM+343334.X) by working behind the Top cover and the Hold-down bracket, unplugging 5 connectors, and loosening 2 screws that lock the unit in place.

Applies to
DryStar 5300 (Type 5365/100)
Personnel
1 technician · Basic-to-intermediate field-service skill — open the Top cover and the Hold-down bracket, unplug 5 connectors (A-E), open the Thermal print head unit itself, then loosen 2 screws (F, one per side) to lift the unit out. No calibration, software step, or special test equipment is involved, and — unlike the TPH flat cable procedure worked in the same area — this one does not require the Front cover, Right side cover, Main board, or Power supply to be removed first.
Steps
12 steps
Source
DD+DIS270.05E — Drystar 5300, Repair and Service: Replacement of Parts, §4.5 (source heading printed "Thermal print head uni" — missing final "t", a typo in the source), Chapter 3.5/84-87 (document p.358-361), Edition 1, Revision 7 (2005-08-05)

Tools & parts

ItemPart numberQty
Thermal print head unitCM+343334.X1
Crosshead screwdriver—1

Full step-by-step for Replace the Thermal print head unit

All 12 steps are documented in the FSELIB DryStar 5300 service manual — re-authored, web-first, with the real figures from the source.

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Related Print engine guides

Replace the Cam shaft drive15 stepsReplace the Drum drive module10 stepsReplace the Input sensors module25 stepsReplace the Main drive pulley & Drum belt13 stepsReplace the Print drum module2 stepsPerform CDM (internal densitometer) calibration7 steps
View all DryStar 5300 guides

Source: DD+DIS270.05E — Drystar 5300, Repair and Service: Replacement of Parts, §4.5 (source heading printed "Thermal print head uni" — missing final "t", a typo in the source), Chapter 3.5/84-87 (document p.358-361), Edition 1, Revision 7 (2005-08-05). Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.