ZEISS SL 220
ZEISS · Model SL 220
Optical Brilliance LED slit lamp with latest LED technology for instant, stable illumination 22 mm stereo base and large field with fully rotatable 12 mm slit for superb view of the entire anterior eye segment High-contrast, high-resolution slit images of exceptional detail for fast, reliable slit lamp examinations Operational Convenience ZEISS slit lamp featuring the popular tower-type user interface for convenient, intuitive operation Joystick, quick action brake and easy-grip controls for precise slit adjustments Choice of 3 or 5 magnification steps for observation from overview to detail Convenient Imaging The ZEISS SL 220 slit lamp features the ZEISS SL Imaging Module: Document any slit lamp examination with high-resolution images and videos – for review, follow-ups and patient education The SL cam 5.0, a fully integrated, highly compact 5-megapixel camera, and the SL imaging software combine forces to deliver high-resolution images and videos User-specific capture settings and image review functionalities promote a smooth workflow.
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.
Optical / illumination fault
MediumSymptoms: Dim, uneven or no illumination; poor or hazy view; slit / filters not working.
Root cause: Bulb / LED at end of life, a power-supply fault, or contaminated optics.
Alignment / positioning-stage fault
MediumSymptoms: Joystick or slide binds, will not hold position, chin-rest / head-rest drive faults.
Root cause: Worn stage bearings / slides or a positioning-drive fault.
Measurement / capture fault
MediumSymptoms: Reading errors (tonometer / autorefractor / lensmeter), no or poor image capture (fundus / OCT), calibration fails.
Root cause: Sensor / camera fault, a calibration issue, or contaminated measurement optics.
Printer / PC / connectivity fault
LowSymptoms: No printout, images / data will not save or transfer.
Root cause: Built-in printer, the PC, or the network / EMR interface.
Motorised table / chin-rest fault (where fitted)
LowSymptoms: Instrument table or chin-rest will not raise / lower.
Root cause: Table / chin-rest actuator or its switch.
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.
Illumination bulb / LED module
Class Frequent wear itemRel. cost $$R&R Fairly easy
Positioning-stage bearings / slides
Class Major service partRel. cost $$R&R Moderate
Measurement sensor / camera module
Class Major service partRel. cost $$$R&R Moderate
Built-in printer / paper
Class Periodic replacementRel. cost $R&R Fairly easy
Chin-rest / table actuator
Class Major service partRel. cost $$R&R Moderate
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Illumination bulb / LED module | Frequent wear item | $$ | Fairly easy |
| Positioning-stage bearings / slides | Major service part | $$ | Moderate |
| Measurement sensor / camera module | Major service part | $$$ | Moderate |
| Built-in printer / paper | Periodic replacement | $ | Fairly easy |
| Chin-rest / table actuator | Major service part | $$ | 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: Dim, uneven or no illumination
- Replace the bulb / LED module with the correct type.
- Check the power supply and rheostat / brightness control.
- Clean the illumination and viewing optics per the manual.
- Confirm the slit, filters and apertures operate.
- Replace the power supply if output is still low.
Symptom: Measurement or capture error
- Run the instrument self-test / calibration.
- Clean the measurement window / objective.
- Verify against a model eye / test target where one exists.
- Confirm patient positioning and fixation.
- Refer the sensor / camera module if calibration will not hold.