Nihon Kohden TEC-5521 K
Nihon Kohden · Model TEC-5521 K
Compact Lower energy Disposable pad adapter cable and disposable pads, automatic charging start for hands-free defibrillation CPR timing sound, and optional voice prompt Crisp, clear TFT color LCD screen displays 2 waveforms Fast charging - less than 3 seconds to 150J and less than 5 seconds to 270J Fast ECG recovery for immediate monitoring after defibrillation High reliability high voltage capacitor protects against defibrillation failure Together with the battery and capacitor test, reliable defibrillation is always assured QP-765VK Defibrillation Report Viewer software lets you review, edit and print defibrillation reports on a Windows® PC Voice and ECG recording on SD memory card
Key tips
- ·Never skip the daily/shift ready-check - a defibrillator found dead during a code is a real, repeated root-cause finding.
- ·Pads and batteries have real expiration dates - check them on every PM, not just at annual service.
- ·Verify energy-delivery accuracy with a real defibrillator analyzer, not just a self-test pass.
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.
High-voltage capacitor failure
HighSymptoms: Charge fails or sluggish, low-energy delivery.
Root cause: Capacitor aging / leakage.
Battery degradation
HighSymptoms: Short charge-hold, low-battery on readiness test.
Root cause: Aged battery pack.
Paddle / electrode fault
HighSymptoms: No shock delivered, pad error.
Root cause: Worn paddles or expired pads.
SELV / patient isolation fault
MediumSymptoms: Leakage alarm, self-test fail.
Root cause: Failed isolation components.
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.
Defibrillation electrodes / pads
Expiration-dated consumable.
Class ConsumableRel. cost $$R&R Easy
Charge relay / contactor
Class Periodic replacementRel. cost $$$R&R Difficult
Patient interface cable
Class Periodic replacementRel. cost $$R&R Fairly easy
Rechargeable battery pack
Critical, keep charged spares.
Class Periodic replacementRel. cost $$$R&R Fairly easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Defibrillation electrodes / pads Expiration-dated consumable. | Consumable | $$ | Easy |
| Charge relay / contactor | Periodic replacement | $$$ | Difficult |
| Patient interface cable | Periodic replacement | $$ | Fairly easy |
| Rechargeable battery pack Critical, keep charged spares. | Periodic replacement | $$$ | Fairly easy |
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/shift visual and self-test check (AAMI EQ56 daily-ready standard)
- ·Battery and pad expiration-date tracking
- ·Energy-delivery accuracy test against a defibrillator analyzer
- ·Paddle/cable continuity check
- ·Annual full PM
Error Codes
Extracted directly from this unit's own service manual.
A527After charging, the capacitor energy is about 15% above the selected energy. Faulty biphasic HV unit. Replace the biphasic HV unit.
A529After charging, the actual charged energy is different from the selected energy. Faulty biphasic HV unit. Replace the biphasic HV unit. Faulty biphasic HV unit.
C501When the CO2 sensor kit is connected, CO2 data is not received. Faulty CPU board. Replace the CPU board. Faulty SpO2 adapter.
C502When the SpO2 adapter is connected, SpO2 data is not received. Faulty CPU board. Replace the CPU board. Faulty mother board.
C507When the power is turned on, the communication error between the RTC (real time clock) and main CPU is detected for one second. Faulty CPU board. Replace the CPU board.
C511The sub CPU does not update the data in the DPRAM for one second. Faulty CPU board. Replace the CPU board.
C512The voice CPU does not update the data in the DPRAM for one second. Faulty CPU board. Replace the CPU board. Faulty DSI Float board.
C513The DSI CPU does not update the data in the DPRAM for one second. Faulty CPU board. Replace the CPU board. Faulty pacer board.
D501Data in the DRAM or flash memory is not read out correctly (summation error). Faulty DRAM or flash memory. Replace the CPU board.
D511When the power is turned on, settings in the System Maintenance screen do not match the backup data in the flash memory. After settings in the System Maintenance screen are changed, the “Flash Save” procedure is not performed. Perform the “Flash Save” procedure in the System Maintenance screen. During power off sequence, power down occurs.
D512When the power is turned on, damaged waveform report data in the flash memory is detected. Faulty CPU board. Replace the CPU board.
Troubleshooting Approach
A structured starting point derived from the failure modes above. Follow the manufacturer's service documentation for the actual procedure.
Symptom: High-voltage capacitor failure
- Confirm the presentation - typically charge fails or sluggish, low-energy delivery - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: capacitor aging / leakage.
- 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 rechargeable battery pack 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: Battery degradation
- Confirm the presentation - typically short charge-hold, low-battery on readiness test - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: aged battery pack.
- 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 hV energy storage capacitor 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
- 8.6 cm Screen Size
- Length
- 11.5 cm Screen Size
- Defibrillator Type
- External, Automated (AED)
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Crash carts (every unit)
- Emergency Department
- ICU
- OR
- Code-blue response areas
Documents & Manuals
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