DRE Compass LED
DRE · Model Compass LED
6-Step magnification system LED lightsource Lux, life, Kelvin 20W LED coaxial illuminator 10x Wide Field Eyepiece (12.5x available) 250mm Objective Lens (200-400mm also available) Apochromatic Objective Lens Integrated Video Camera Adjustable Eyecups Rotatable Maneuvering Handles Counter-balanced pantographic arms design and tension control adjustable.
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.
LED coaxial illuminator failure
MediumSymptoms: No or dim light, colour shift from the 20 W LED, flicker, uneven field.
Root cause: Failed LED module or its driver.
Balanced (pantographic) arm drift
HighSymptoms: Scope head drifts or sags, will not stay positioned, tension control ineffective.
Root cause: Worn counterbalance spring or friction brakes on the pantographic arm.
Magnification changer fault
MediumSymptoms: 6-step magnification will not click through cleanly, image jumps or is blurred at a step.
Root cause: Worn detent or a decentred lens in the magnification drum.
Integrated video camera fault
LowSymptoms: No video output, poor image, will not white-balance.
Root cause: Camera module or cable fault.
Focus / working-distance drift
LowSymptoms: Cannot hold focus, objective focus creeps.
Root cause: Worn fine-focus mechanism.
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.
LED illuminator module (20 W coaxial)
Class Major service partRel. cost $$R&R Moderate
LED driver / power supply
Class Major service partRel. cost $R&R Moderate
Pantographic arm counterbalance / brake kit
Class Major service partRel. cost $$$R&R Difficult
Magnification changer detent / lens assembly
Class Major service partRel. cost $$$R&R Difficult
Integrated video camera
Class Major service partRel. cost $$$R&R Moderate
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| LED illuminator module (20 W coaxial) | Major service part | $$ | Moderate |
| LED driver / power supply | Major service part | $ | Moderate |
| Pantographic arm counterbalance / brake kit | Major service part | $$$ | Difficult |
| Magnification changer detent / lens assembly | Major service part | $$$ | Difficult |
| Integrated video camera | Major service part | $$$ | Moderate |
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: Illuminator out or dim
- Confirm mains power and the illuminator switch.
- Check the LED driver output.
- Replace the driver if the LED is good but unpowered.
- Replace the LED module for a failed emitter.
- Verify even, full-brightness coaxial illumination and correct colour temperature.
Symptom: Scope head will not hold position
- Balance the head for the fitted accessories (camera, tube) per the manual.
- Adjust the arm tension controls.
- Replace the counterbalance spring / friction brakes if adjustment does not hold.
- Cycle the arm through its range and confirm it holds at several positions.
- Re-check after any accessory change.