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
| Item | Part number | Qty |
|---|---|---|
| Thermal print head unit | CM+343334.X | 1 |
| 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.
Open the full procedureRelated 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 guidesSource: 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.