Thermo Fisher Scientific HistoStar
Thermo Fisher Scientific · Model HistoStar
Brightly illuminated and clutter free - user-adjustable LED lighting uniformly illuminates the workspace without the clutter of awkward remote lamps Cool and contoured - smooth and insulated user contact points constructed to eliminate pressure points and uncomfortable heat conditions High capacity for high efficiency - 5-liter paraffin capacity, cold plate area for 72 base molds, large heated workspace and specimen holding area enables users to manage heavy workflow in even the busiest laboratories Handle any sample size with ease - workstation offers the first adjustable paraffin dispense paddle; a simple adjustment moves the paddle to the most ergonomic position for each user; embed even Super Mega Cassettes with ease Intuitive user interface - large, easy-to-read touchscreen display allows quick access to temperature controls and other parameters.
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Wax not melting or temperature not held
HighSymptoms: Wax reservoir or dispenser not at working temperature, wax solidifying.
Root cause: Heater element, temperature sensor, or control-board fault in the embedding module.
Wax dispenser will not dispense or drips
MediumSymptoms: No flow from the paddle-controlled dispenser, or continuous drip.
Root cause: Clogged or worn wax dispenser valve.
Cold module not cooling
MediumSymptoms: Cold plate not cold, blocks will not set.
Root cause: Thermoelectric (Peltier) module or its fan / control fault.
Fuses blow repeatedly
MediumSymptoms: Unit dead, replacement fuses fail again.
Root cause: A downstream short - disconnect and contact Thermo Fisher Service.
Touchscreen inaccurate
LowSymptoms: Touch location off, hard to set parameters.
Root cause: Touchscreen needs the power-on calibration sequence.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Heater element (embedding module)
Class Major service partRel. cost $$R&R Difficult
Temperature sensor
Class Major service partRel. cost $$R&R Moderate
Wax dispenser valve
Class Periodic replacementRel. cost $$R&R Moderate
Peltier cold-plate module
Class Major service partRel. cost $$$R&R Difficult
Fuses (replace as a pair)
Class Major service partRel. cost $R&R Fairly easy
Heated forceps
Class Periodic replacementRel. cost $$R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Heater element (embedding module) | Major service part | $$ | Difficult |
| Temperature sensor | Major service part | $$ | Moderate |
| Wax dispenser valve | Periodic replacement | $$ | Moderate |
| Peltier cold-plate module | Major service part | $$$ | Difficult |
| Fuses (replace as a pair) | Major service part | $ | Fairly easy |
| Heated forceps | Periodic replacement | $$ | Easy |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Wax not at temperature
- Check the set temperatures on the touchscreen for each zone.
- Confirm the heater draws current and the element is intact.
- Compare the sensor reading to an independent probe.
- Replace the sensor or element as found.
- Verify each zone reaches and holds temperature.
Symptom: Fuses blow repeatedly
- Ensure the unit is off and disconnected from mains.
- Open the fuse drawer and fit correctly rated fuses as a pair.
- If they blow again, do not keep replacing them.
- Disconnect from mains and contact Thermo Fisher Service.
- Do not return to use until the short is found.