UNICO G506
UNICO · Model G506
Head: G506HS: Seidentopf Binocular Head (Inclined 30). G506THS: Seidentopf Camera-Ready Trinocular Head (Inclined 30). Nosepiece: 5 position nosepiece. Eyepiece: Paired wide field 10X (FN 18 mm) high point eyepieces with dual diopter. A pointer or reticule can be added. Objectives: All objectives are parfocal, parecentered, and color-coded. Plan Objectives: 10X, 20X, 40X, and 100X (oil). Filter Cubes: 4 slots: UV3, B3 (blue), and G3 (green). Filter Holder: 4 position filter holder (3 filters supplied). Focus: The low position coaxial coarse and fine focusing system designed to lessen user fatigue. The coarse focus tension control allows to increase or decrease the focusing tension. The safety stop prevents damage to objectives and specimens. The fine focusing is graduated at 0.002 mm. Stand: Ruggedly constructed all metal stand and broad low profile base. Stage: Heavy duty, built-in graduated mechanical stage with low position coaxial X-Y controls. Ball bearing movement (with dovetail mechanism) allows for smooth, precise adjustments. Stage size is 180 mm x 150 mm and the range of X-Y stage movement is 80 mm x 50 mm. Condenser: Abbe condenser N.A. 1.25 with graduated iris diaphragm is focusable and centerable. Illumination: 3 watt LED (bottom) and 100 watt mercury bulb (top). UV Panel: UV blocking panel above stage. Power Input: 90-240 V. Fuse rating is 250 V and 1.5 A.
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.
Uneven or dark illumination
MediumSymptoms: Vignetting, dark edges, uneven brightness across the field.
Root cause: Condenser height/aperture wrong, field diaphragm not centred, nosepiece not clicked in, or dirty optics; lamp/LED aging.
Poor image quality / low contrast
MediumSymptoms: Blurry or low-contrast image.
Root cause: Wrong or missing 0.17 mm cover glass, immersion oil on a dry objective, air bubbles in the oil, or condenser aperture mis-set.
Illuminator lamp / LED failure
MediumSymptoms: No or dim light, will not brighten.
Root cause: Lamp / LED at end of life, or a rheostat / driver fault.
Focus / stage / nosepiece wear
LowSymptoms: Focus slips or binds, stage stiff or slips, nosepiece detent worn.
Root cause: Worn focus clutch or dried stage grease.
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.
Illuminator lamp / LED module
Class Periodic replacementRel. cost $R&R Fairly easy
Rheostat / illuminator driver
Class Major service partRel. cost $R&R Moderate
Focus mechanism / clutch kit
Class Major service partRel. cost $$R&R Difficult
Objective lens (DIN achromat)
Class Major service partRel. cost $$$R&R Fairly easy
Mains fuse
Class Major service partRel. cost $R&R Fairly easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Illuminator lamp / LED module | Periodic replacement | $ | Fairly easy |
| Rheostat / illuminator driver | Major service part | $ | Moderate |
| Focus mechanism / clutch kit | Major service part | $$ | Difficult |
| Objective lens (DIN achromat) | Major service part | $$$ | Fairly easy |
| Mains fuse | Major service part | $ | Fairly 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: Dark or uneven field
- Click the nosepiece fully into a detent.
- Set the condenser height and aperture and centre the field diaphragm (Kohler).
- Clean the objective, condenser, eyepieces and collector.
- Check / replace the lamp or LED if dim.
- Re-check across objectives.
Symptom: Blurry image
- Fit a 0.17 mm cover glass, slide right-side up.
- Remove immersion oil from dry objectives; use oil only with oil objectives and clear bubbles.
- Set the condenser aperture.
- Clean all optical surfaces.
- Re-evaluate the image.
Documents & Manuals
Related calculators
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