FANUC αiSV 20/20/40 three-axis servo amplifier rated 20 A, 20 A and 40 A, 200 V supply. It supports both HRV2 and HRV3 current control.
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Scope of service activities — What activities are performed when servicing this type of device:
INITIAL INSPECTION
10 activities
Visual condition
- Device is complete? Check whether the device is complete as a functional unit and no part needed for operation is missing.
- Previous intervention? Assessment whether the device shows traces of previous service intervention or repair.
- Mechanical damage? Visual check for mechanical damage – cracks, deformation, broken parts, etc.
- Visible contamination? Assessment of visible contamination of the device – dust, grease, operational dirt.
Handling
- Disassembly required? Determining whether disassembly of the cover, frame, or other components is required to access internal parts.
- Demanding disassembly? Assessment of whether disassembly of the device requires special tools, fixtures, or increased labor.
- Special handling needed? Assessment of whether handling requires a special procedure due to weight, size, or fragility.
Cleaning
- Cleaning required? Assessment of whether device contamination requires cleaning before diagnostics and service.
- Air blow-out Blowing dust and dirt out of internal and external parts of the device with compressed air.
- Water cleaning Cleaning the device with water – gentle removal of deposited dirt from surfaces and components.
ELECTRICAL SERVICE
35 activities
Cooling
- Active cooling - fans Inspection of fan condition and operation for active cooling of electronic components.
- Passive cooling - heatsinks, paste Heatsink, thermal paste and other passive cooling element inspection.
Insulation
- PCB insulation state Insulation resistance measurement of PCBs – check for leakage between traces.
- Insulation state of wires and connectors Insulation state check of wires and connectors – insulation wear, oxidation, damage.
- Conductive paths Conductivity check of PCB traces – continuity and joint resistance measurement.
Fasteners
- Connectors Connector inspection – contact state, correct seating, mechanical damage, oxidation.
- Wires Wire inspection – insulation, mechanical damage, correct wiring, cross-section.
Protections
- Fuses, thermal protections Fuse and thermal protection inspection against overload and short circuit.
- Circuit breakers Circuit breaker inspection – correct tripping on overcurrent.
- Surge protections Surge protection inspection – varistors, gas dischargers and other overvoltage protection elements.
Switching elements
- Relays, contactors Relay and contactor inspection – switching operation, contact state, mechanical wear.
Power supply section
- Power supply section Power supply section diagnostics – output voltages, ripple, stability measurement.
- Batteries Battery inspection – capacity, voltage, internal resistance, signs of degradation.
Power section
- Power elements Power semiconductor inspection – transistors, diodes, thyristors, IGBT modules.
- Power element control Power element control circuit inspection – drivers, gate drivers, control signals.
Input section
- Keyboard Keyboard inspection – key response, mechanical condition, contact pads.
- Touch layer Touch layer inspection – sensitivity, accuracy, dead zones.
- Buttons, switches Mechanical state and functional check of buttons and switches.
- Digital inputs Digital input check – correct evaluation of input signals and voltage levels.
Output section
- Displays Display inspection – image, backlight, dead pixels, contrast.
- LEDs, indicators LED indicator inspection – brightness, color, operation.
Communication section
- Buses Communication bus inspection – CAN, RS485, SPI, I2C – signal integrity and transfer rates.
- Optics Optical communication check – fiber optic links, transmitters and receivers.
Measurement, sensors
- Temperature sensors Temperature sensor inspection – PTC, NTC, thermocouples – measurement accuracy, calibration.
- Current, voltage sensors Current and voltage sensor inspection – Hall probes, shunts, current transformers.
- Other circuits Other measurement and auxiliary circuit check – A/D converters, filters, reference sources.
Software
- Parameters Check and backup of the device operating parameters stored in memory.
- User software User software check – version, operation, application program integrity.
- Firmware Firmware check – version, compatibility, possible need for an update.
Control section
- Processors Processor inspection – operation, clock frequency, communication with other circuits.
- Memory Memory module check – EEPROM, Flash, RAM – read, write, data retention.
- Controllers Controller inspection – communication, peripheral control, correct operation.
Mechanics
- Structural components Structural component check – holders, frames, cooling fins, mounting parts.
- Fasteners Fastener inspection – screws, nuts, washers, rivets – tightening and state.
- Protective film Cover foil inspection – integrity, adhesion, legibility of labels and symbols.
ADDITIONAL ACTIVITIES
13 activities
Cleaning
- Chemical cleaning Chemical cleaning as part of additional activities.
- Multi-stage cleaning Multi-stage cleaning as part of additional activities.
- Ultrasound Ultrasonic cleaning as part of additional activities.
- Drying Component drying as part of additional activities.
- Sandblasting Surface sandblasting as part of additional activities.
- Degreasing Surface degreasing as part of additional activities.
Replacement
- Replacement of out-of-tolerance parts Replacement of out-of-tolerance parts – worn or damaged components.
- Replacement of covers, mechanical parts Replacement of damaged covers, frames, and other mechanical parts.
Production
- Component production Custom manufacture of replacement components when not available as spare parts.
Other work
- Coating, bonding Coating, bonding and other surface treatments during repair.
- PCB repair PCB repair – soldering, component replacement, trace repair.
- Insulation and conductive path repair Insulation and conductive path repair – insulation restoration, reconnection of broken links.
- Surface treatment Surface treatment during additional activities – protection, conservation, final finish.
OUTPUT TESTS
7 activities
Functionality
- Basic functions Basic device function test – power-on, communication, input response.
- Full test Full functional test – verification of all available functions under operating conditions.
- Complete functions Complete test of all functions including edge cases and limit values.
Load testing
- No load No-load device test – verification of open-circuit voltage and basic function.
- Thermal stress Thermal stress test – verification of operation at elevated temperature.
- Under load Device test under load – verification of power parameters under load.
- Vibration test Vibration test – verification of device durability and operation under mechanical stress.