A dec 500 Dental Chair
A dec · Model 500 Dental Chair
Ultra-thin backrest that "flexes. Enables comfortable tuck of knees under the chairno hard metal back to worry about; cradles the patient in comfort and features upholstery thinner than 1" (25 mm) in some areas. Double-articulating, gliding headrest. Moves with the patient to improve comfort; adjusts easily with one hand. Innovative hydraulic lift system. Results in gentle stops and starts during patient positioning. Integrated 300-watt power supply. Provides more than enough power for the whole system; powers light and additional ancillary devices. Expanded height range. Offers a range from 13.5" (343 mm) to 31.5" (800 mm) so any doctor, regardless of height, can work comfortably. 60º swivel with brake. Allows 30º rotation on each side of center. Multi-position armrests. Rotates out of the way to streamline patient entry and exit/ Cut-away, cast iron baseplate. Allows you to roll your stool closer to the patient; provides six contact points for added stability on uneven floors.
Key tips
- ·Biological-indicator verification applies to dental sterilizers exactly the same as hospital CSSD - no exception for smaller units.
- ·"Sounds different" is often the first real report of handpiece bearing wear, not an outright failure - investigate early rather than waiting.
Typical Failure Modes
Failure patterns typical of this equipment class - general BMET reference, not verified against this exact unit's own service history unless flagged. Severity is a category-level estimate.
Handpiece turbine wear
MediumSymptoms: Low RPM, noise, poor cut.
Root cause: Bearing/turbine wear.
Compressor fault
MediumSymptoms: Low air pressure, moisture.
Root cause: Worn compressor / dryer.
Foot control failure
LowSymptoms: No/erratic activation.
Root cause: Fluid ingress / worn switch.
Curing light LED fade
LowSymptoms: Weak cure, low intensity.
Root cause: LED aging.
Serviceable Parts & Consumables
The parts a BMET typically services on this class of equipment. Service class and relative cost are general engineering estimates for the category, not figures from this unit's documentation. Part numbers appear only when pulled from this unit's own service manual. Always confirm intervals and pricing against the manufacturer.
Air compressor & dryer
Class Periodic replacementRel. cost $$$R&R Difficult
Foot pedal
Class Periodic replacementRel. cost $$R&R Fairly easy
Curing light LED head
Class Periodic replacementRel. cost $$R&R Fairly easy
Handpiece turbine / cartridge
Most-replaced; track autoclave cycles.
Class Frequent wear itemRel. cost $$$R&R Moderate
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Air compressor & dryer | Periodic replacement | $$$ | Difficult |
| Foot pedal | Periodic replacement | $$ | Fairly easy |
| Curing light LED head | Periodic replacement | $$ | Fairly easy |
| Handpiece turbine / cartridge Most-replaced; track autoclave cycles. | Frequent wear item | $$$ | Moderate |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Daily handpiece lubrication and autoclave cycle verification
- ·Compressor moisture-trap draining
- ·Annual full PM
Troubleshooting Approach
A structured starting point derived from the failure modes above. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Handpiece turbine wear
- Confirm the presentation - typically low RPM, noise, poor cut - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: bearing/turbine wear.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the handpiece turbine / cartridge per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Symptom: Compressor fault
- Confirm the presentation - typically low air pressure, moisture - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: worn compressor / dryer.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the air compressor & dryer per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Technical Specs
- Height
- 31.5
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Dental operatory
- Oral surgery suite
- CSSD (dental sterilizers)
Documents & Manuals
- A-dec 500 Delivery Systems Instructions for UseUser Manual · External
- A-dec 500 Dental Chair 12 O'Clock System Instructions for UseUser Manual · External
- A-dec 500 Dental Chair Owner's GuideUser Manual · External
- A-dec Model 551 Assistant's Instrumentation Owner's GuideUser Manual · External
- A-dec Preference ICC Instructions for UseUser Manual · External
- A-dec Preference Slimline Instructions for UseUser Manual · External
- A-dec Syringes Instructions for UseUser Manual · External
- A-dec Tooth Dryer Owner's GuideUser Manual · External
- A-dec/W&H EA-51LT Electric Motor Instructions for UseUser Manual · External
- A-dec 500 Dental Chair BrochureBrochure · External
- A-dec 500 Cuspidor Owner's ManualDocument · External
- A-dec Dental LightsDocument · External
- A-dec Self-Contained Water SystemsDocument · External
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