HC10400 — Thermal printhead average resistance out of tolerance
Agfa CT error code, reported by the TH Module — Resistance Calibration.
What HC10400 means
On DryStar 5500 (Type 5364/100) and DryStar 5503 (Type 5364/300) CT systems, status code HC10400 indicates: Thermal printhead average resistance out of tolerance. The code originates in the TH Module — Resistance Calibration section of the TH Module — Resistance Calibration. Severity level alarm (Alarm).
Reported action: Check the power connectors from P3 and P4 of the THIB board to the thermal head — fix or replace connectors if not OK. If connections are fine and the drift persists, replace the thermal head; if the head itself is confirmed OK, the resistance-measurement functionality on the MEC board is the remaining documented cause..
Raised on the Drystar 5500/5503 after the printer measures all thermal printhead (TH) resistors and finds the average resistance value out of the tolerance stored in the printer's own thpar configuration file. The engine is still allowed to print, but image quality may decrease, shown on the local display as "Printhead problem".
Full troubleshooting for HC10400
The complete diagnosis, cause tree, and step-by-step remedy for the TH Module — Resistance Calibration subsystem are documented in the FSELIB Activion16 (TSX-031A) service manual — re-authored, web-first, with real figures.
Open the Activion16 service manualRelated TH Module — Resistance Calibration codes
Source: AGFA DryStar service manual — HC error catalogue (FSELIB authored corpus). Reference information re-authored by FSELIB — not a copy of the OEM manual.