Ultrasound therapy systems · Dynatron family

Dynatronics 950plus: troubleshooting and error codes

The ServiceForge knowledge base holds 61 documented symptoms for the Dynatronics 950plus, with 90 ranked causes, 111 diagnostic checks with test points and expected values, and 8 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Ultrasound therapy patient burn from improper administration patient safety

Patient may suffer burn from ultrasound if therapy not administered properly. Risk factors include high intensity, low frequency, static applicator, slow movement, or treatment of areas with sensory nerve damage.

Ranked causes

1. Too high intensity (power) setting (common)
2. Too low frequency selection (occasional)
3. Applicator head held static on one location (common)
4. Applicator moved too slowly across skin (common)
5. Treatment of areas with sensory nerve damage or desensitization (occasional)
6. Uncalibrated or faulty ultrasound unit generating shear and standing waves (rare)

First check

Set ultrasound intensity appropriately

Test point: Power/intensity output setting
Expected: Low to moderate intensity appropriate for treatment goal and patient tolerance

5 more checks with pass and fail actions, 6 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Microcurrent therapy patient discomfort from high intensity or probe use patient safety

Microcurrent at high intensity, especially with probes, concentrates current in very small areas causing patient discomfort. Uses low frequencies that normally are not felt.

Ranked causes

1. High current density from probe application (common)
2. High current density from electrode contamination (occasional)
3. Defective or poorly adhered electrodes (occasional)
4. Uneven electrode placement on skin irregularities (occasional)

First check

Select microcurrent intensity for probe application

Test point: Intensity setting dial/display
Expected: Low to moderate current setting per published literature

2 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Other error messages in display

Alpha-numeric error message(s) displayed in LED displays preventing treatment setup or delivery

Ranked causes

1. Transient error or connection issue (common)
2. Soundhead disconnected or damaged (occasional)
3. Soundhead overheating (occasional)
4. Moisture condensation in device (rare)

First check

Power cycle the device

Test point: Power switch
Expected: Device restarts; error message clears

3 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Poor conductance during interferential or premodulated treatment setup patient safety

Conductance bar graph shows only 1-3 segments lighted instead of 8, indicating inefficient current delivery through electrodes

Ranked causes

1. Leads or electrodes in poor condition (common)
2. Leads not fully plugged in (common)
3. Electrode not making full contact with patient skin (common)
4. Extremely dry patient skin (occasional)

First check

Visually inspect leads and electrodes for wear or damage

Test point: Lead connectors and electrode surfaces
Expected: No visible damage, tears, or deterioration

3 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Device does not power on with battery connected

Device fails to power on when battery is connected to BATT jack and battery pack is turned on.

Ranked causes

1. Battery not adequately charged (common)
2. Incorrect battery adapter connection (occasional)
3. Battery pack ON/OFF switch not activated (occasional)

First check

Verify battery has been charged

Test point: Battery pack charge indicator
Expected: Fully charged

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Lead or pad resistance high or open patient safety

No stimulation felt; electrical path broken or incomplete

Ranked causes

1. Lead open circuit (common)
2. Pad degradation or high resistance (occasional)
3. Poor electrical connection at jack or connector (occasional)

First check

Test lead continuity with DVM

Test point: Patient lead tip and ring connectors
Expected: Continuous beep (0000 on meter)
Tools: Beckman Circuitmate DM78 DVM or equivalent, continuity checker setting

2 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Soundhead overheating during treatment patient safety

POWER display flashes or 'HOT' error message shown, output stopped, treatment paused, soundhead too hot to continue

Ranked causes

1. Poor coupling between soundhead and patient (common)
2. Soundhead held in air without coupling agent (common)
3. Insufficient cooling time between treatments (occasional)

First check

Observe coupling bar graph during treatment

Test point: Display SOUND-TARGET simultaneously
Expected: Eight lighted segments indicate good coupling

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

BATT BAD message displayed and device shuts off

Device displays BATT BAD message, treatment intensity ramps down, device shuts off. Message indicates either defective battery or battery fully depleted. Any running treatments stop.

Ranked causes

1. Battery fully depleted (common)
2. Defective or failing battery (occasional)

First check

Verify battery charge state after recharging

Test point: Battery pack indicator or charge state
Expected: Battery fully charged

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Current limit warning threshold reached patient safety

Device automatically reduces intensity when maximum output current limit is exceeded. Warning manifests as immediate intensity reduction, beeping, and flashing intensity display.

Ranked causes

1. Patient unable to adequately feel current due to desensitization (occasional)
2. Four large electrodes dispersing current over large surface area (occasional)

First check

Verify patient can feel treatment current

Test point: Patient sensation report
Expected: Patient reports feeling current sensation

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Head Parameters Mode displays incorrect soundhead size

Power-Intensity display shows wrong head size value or no value when device is in Head Parameters Mode

Ranked causes

1. Incompatible or defective soundhead plugged in (occasional)
2. Connector pin damage or corrosion (rare)

First check

Identify soundhead type and verify match to display

Test point: Power-Intensity display; physical soundhead label
Expected: Display value matches soundhead size: 2, 5, or 10 cm2 for SmartHeads; H1, H2, H5, or H10 for older heads

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Inadequate ultrasound power delivery to patient patient safety

Patient not receiving intended ultrasonic wave dosage, evidenced by poor coupling or reduced treatment effectiveness

Ranked causes

1. Air gap between soundhead and treatment site (common)
2. Insufficient coupling agent applied (common)

First check

Display coupling bar graph

Test point: Press SOUND-TARGET keys simultaneously
Expected: Eight lighted segments indicating best conductance

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Intensity increase during treatment setup patient safety

Current delivery to patient is prevented or blocked when attempting to increase intensity setting

Ranked causes

1. LEAD error condition (open circuit) (common)
2. Intensity set below minimum detection threshold (occasional)

First check

Check Time display for LEAD error message

Test point: Time display on front panel
Expected: No LEAD message displayed

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

No soundhead detected

Error message 'HEAD' displayed in TIME display; device unable to detect soundhead during setup or treatment delivery

Ranked causes

1. Soundhead not firmly plugged in (common)
2. Damaged soundhead or wrong type connected (occasional)

First check

Verify soundhead connector firmly seated

Test point: Soundhead connector port
Expected: Soundhead firmly plugged in; no gaps visible

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Patient cannot feel electrical stimulation patient safety

Patient reports inability to perceive current during treatment

Ranked causes

1. Treating area with sensory loss or neuropathy (occasional)
2. Intensity set too low for patient to perceive (common)

First check

Confirm patient reports sensation during intensity increase

Test point: Patient feedback
Expected: Patient reports feeling electrical stimulation

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Ultrasound applicator overheating from poor coupling or fast movement caution

Soundhead can overheat if applicator head becomes uncoupled with skin or is moved too rapidly, reducing energy delivery to patient.

Ranked causes

1. Loss of soundhead-skin contact (uncoupling) (common)
2. Air exposure of soundhead during treatment (occasional)

First check

Verify soundhead maintains skin contact throughout treatment

Test point: Soundhead-skin interface
Expected: Continuous full contact without lifting or gaps

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Unit does not enter Head Parameters Mode

Device fails to recognize or enter Head Parameters Mode when soundhead is plugged in and power restored

Ranked causes

1. Soundhead not firmly plugged in (common)
2. Incorrect button hold timing during startup (occasional)

First check

Verify soundhead connector is fully inserted

Test point: Soundhead output jack
Expected: Soundhead seated flush with connector; no movement when gently pushed

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

650/550plus fuse incorrect rating caution

Installed fuse rating does not meet specification for 650plus/550plus models

Ranked causes

1. Wrong fuse amperage installed (common)

First check

Verify fuse rating matches model specification

Test point: Fuse holder
Expected: 1.6A (650plus) or 0.8A (550plus) slow-blow 250V

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

650/550plus ground fault - chassis leakage excessive high voltage

Leakage current from chassis to ground exceeds safe limits for 650plus/550plus models

Ranked causes

1. Insulation breakdown in power supply or output circuits (occasional)

First check

Measure 650/550plus chassis leakage no ground

Test point: Chassis to ground
Expected: ≤200 µA, ≤200 µA
Tools: Leakage current meter

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

650/550plus ground fault - chassis leakage with ground connected high voltage

Leakage current from chassis to ground exceeds safe limits for 650plus/550plus models when grounded

Ranked causes

1. Capacitive leakage in power supply circuits (common)

First check

Measure 650/550plus chassis leakage grounded

Test point: Chassis to ground
Expected: ≤200 µA per specification
Tools: Leakage current meter

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

650/550plus ground fault - hot/return reversed high voltage

AC mains hot and return connections are reversed on 650plus/550plus models

Ranked causes

1. Reversed AC mains connections in power entry (rare)

First check

Verify 650/550plus AC mains polarity

Test point: Power entry connector pins
Expected: Hot wire higher potential than return

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

BATT LO message displayed during operation

Device displays BATT LO message indicating low battery power. Treatment can continue but setup of new treatment may not be possible when current treatment ends.

Ranked causes

1. Battery power depleted below operational threshold (common)

First check

Verify battery charge level

Test point: Battery pack indicator or charge state
Expected: Battery fully charged before use

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Bi-phasic stimulation output incorrect high voltage

Bi-phasic mode output voltage out of range or current limit exceeded in normal or two-channel modes

Ranked causes

1. Bi-phasic output voltage out of specification (common)

First check

Measure bi-phasic one channel normal output

Test point: Output terminals
Expected: 42-55 Vpp on all channels, 42-55 Vpp
Tools: Oscilloscope

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Cannot stop single channel treatment while multiple treatments in progress

Operator unable to isolate stop command to one channel when multiple treatments active

Ranked causes

1. Standard STOP key halts all channels simultaneously (common)

First check

Determine if single or multi-channel stop is needed

Test point: Number of active treatments
Expected: Multiple treatments in progress on different channels

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Combo cable stim output not functioning high voltage

Stimulation output does not work through combo cable when using 5cm smartsoundhead in combo mode

Ranked causes

1. Combo cable malfunction or stim circuit fault (occasional)

First check

Measure stim output through combo cable

Test point: Combo cable output connector
Expected: 42-55 Vpp output present, 42-55 Vpp
Tools: Oscilloscope

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Conductance bar graph not functional

Conductance indicator does not respond to load changes or display status incorrectly

Ranked causes

1. Conductance sensing circuit malfunction (occasional)

First check

Test conductance bar graph response

Test point: Display bar graph
Expected: Bar graph changes with load resistance

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Coupling bar graph not functional

Coupling/contact indicator does not respond to acoustic contact changes with 5cm smartsoundhead

Ranked causes

1. Coupling sensor or display circuit malfunction (occasional)

First check

Test coupling bar graph with 5cm smartsoundhead

Test point: Display during contact changes
Expected: Bar graph changes with acoustic coupling

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Current delivered to patient before treatment timer starts high voltage

Patient receives stimulation immediately when intensity is raised, before START is pressed

Ranked causes

1. Intensity increase causes immediate current delivery (common)

First check

Confirm patient is ready before raising intensity

Test point: Patient preparation and positioning
Expected: Patient seated/positioned and informed, electrodes/probes in place

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Custom presets not functional

Custom preset storage or recall not working properly

Ranked causes

1. Preset memory malfunction (occasional)

First check

Test custom preset storage and recall

Test point: Unit menu system
Expected: Presets save and recall correctly

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Duty Cycle or frequency LED not illuminating during parameter entry

Expected LED (10%, 20%, 50%, CONT, or frequency selector) fails to light when corresponding button is pressed during Head Parameters Mode

Ranked causes

1. LED indicator burned out or circuit failure (rare)

First check

Verify LED illuminates when corresponding button pressed

Test point: 1 MHz, 2 MHz, 3 MHz LED indicators; CONT, 50%, 20%, 10% Duty Cycle LEDs
Expected: LED lights within 0.5 seconds of button press

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error 13 message

Error 13 code displayed in LED display

Ranked causes

1. Soundhead plugged in while device powered on (occasional)

First check

Verify soundhead firmly connected

Test point: Soundhead connector
Expected: Soundhead seated flush in connector

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Fuse rating incorrect caution

Installed fuse does not meet specification for amperage or voltage rating

Ranked causes

1. Wrong fuse installed (common)

First check

Verify fuse rating

Test point: Fuse holder
Expected: 1.6 Amp slow-blow 250V

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Ground fault - chassis leakage excessive high voltage

Leakage current from chassis to ground exceeds safe limits with or without grounding, indicating insulation breakdown

Ranked causes

1. Insulation breakdown in power supply or output circuits (occasional)

First check

Measure chassis leakage no ground

Test point: Chassis to ground
Expected: ≤75 µA, ≤75 µA
Tools: Leakage current meter

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Ground fault - chassis leakage with ground connected high voltage

Leakage current from chassis to ground exceeds safe limits when protective ground is connected

Ranked causes

1. Capacitive leakage in power supply or output coupling (common)

First check

Measure chassis leakage with ground connected

Test point: Chassis to ground
Expected: ≤75 µA per specification
Tools: Leakage current meter

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Ground fault - hot/return reversed high voltage

AC mains hot and return connections are reversed on internal wiring, creating potential shock hazard

Ranked causes

1. Reversed AC mains connections in power entry module or internal wiring (rare)

First check

Verify AC mains polarity

Test point: Power entry connector pins
Expected: Hot wire higher potential than return

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Head temperature bar graph not functional

Temperature indicator does not respond to head temperature changes or display is inaccurate

Ranked causes

1. Temperature sensor or display circuit malfunction (occasional)

First check

Test temperature bar graph response

Test point: Display during operation
Expected: Bar graph increases as head warms

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

High voltage output incorrect high voltage

High voltage mode output not at specified 500V or polarity not switching correctly

Ranked causes

1. High voltage output out of specification (common)

First check

Measure high voltage output no load

Test point: Output terminals
Expected: 500 volts -10% V, -10% (450V minimum)
Tools: High voltage probe with oscilloscope or high voltage meter

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Inability to change pulse rate range after treatment starts

High to Low pulse rate range change not permitted once treatment begins

Ranked causes

1. Attempting to change pulse rate range after pressing START (common)

First check

Confirm pulse rate range is set before treatment begins

Test point: HIGH/LOW range indicator lights
Expected: Either HIGH or LOW range selected (not combined)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Incorrect BATT LO error with adequate battery charge

BATT LO message displayed even though battery pack has sufficient charge remaining. Caused by inadequate quality of battery adapter cord.

Ranked causes

1. Low-quality gauge battery adapter cord causing voltage drop (occasional)

First check

Verify battery charge level with multimeter at battery pack terminals

Test point: Battery pack positive and negative terminals
Expected: 12 volts minimum

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Interferential stimulation output incorrect high voltage

Output voltage not in specified range or current limit not functioning properly during interferential mode operation

Ranked causes

1. Output voltage out of specification (common)

First check

Measure interferential output voltage static mode

Test point: Output terminals
Expected: 42-55 Vpp ± 4 Vpp on all channels, 42-55 Vpp
Tools: Oscilloscope

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Keyboard or LED malfunction

Keys do not function or lack tactile response. LEDs fail to light on power up or during operation.

Ranked causes

1. Keyboard matrix or LED circuit failure (occasional)

First check

Test all key presses for tactile feel and function

Test point: Unit keypad
Expected: Each key has good tactile feedback and functions

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Lead test function not working

Lead test does not activate target/sweep on power up or after function change

Ranked causes

1. Lead test software or hardware malfunction (occasional)

First check

Verify lead test triggers on power up

Test point: Unit output
Expected: Target/sweep activates automatically

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

LEAD warning displayed during interferential treatment setup patient safety

Device beeps and displays 'LEAD' error with channel number in intensity display; intensity cannot be increased

Ranked causes

1. Open or incomplete circuit in electrode circuit (common)

First check

Reduce intensity on affected channel

Test point: Intensity control for channel indicated in error
Expected: Intensity reduced below detection threshold

2 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Lead warning message not displayed patient safety

Check lead warning does not appear when leads are disconnected or open

Ranked causes

1. Lead detection circuit malfunction (occasional)

First check

Test lead warning display

Test point: Unit display and output detection
Expected: Warning appears when leads disconnected

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Microcurrent Channel 1 unavailable during probe treatment

Channel 1 electrode option cannot be used simultaneously with microcurrent probe treatment

Ranked causes

1. Microcurrent probe treatment active on device (common)

First check

Verify microcurrent probe treatment status before Channel 1 setup

Test point: Microcurrent probe output jack
Expected: No microcurrent treatment active if Channel 1 electrode treatment needed

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Microcurrent output incorrect high voltage

Microcurrent mode output voltage not within tolerance at specified levels or polarity not switching correctly

Ranked causes

1. Microcurrent output out of specification (common)

First check

Measure microcurrent at 10 µA setting

Test point: Output terminals
Expected: 10 µA +/-10%, +/-10%
Tools: µA meter or sensitive ammeter

3 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Oscillator frequency drift out of range

Processor unable to calibrate oscillator; error message displayed

Ranked causes

1. Oscillator frequency drift exceeds calibration range (unknown)

First check

Monitor oscillator frequency during test cycle

Test point: Internal oscillator output
Expected: Calibrated to proper output frequencies

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Patient discomfort when polarity changes during dual polarity treatment patient safety

Patient reports discomfort when device alternates between positive and negative polarity

Ranked causes

1. Dual polarity selected (both + and - polarities active) (common)

First check

Determine current polarity selection

Test point: HI VOLT polarity LEDs (+ and -)
Expected: Both + and - LEDs on

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Physical inspection issues caution

Labels missing or damaged, screws loose, chime non-functional, jacks loose or damaged, remote stop not working, micro probe conductance issue

Ranked causes

1. Physical damage or assembly defect (common)

First check

Visual inspection of labels, screws, jacks

Test point: Unit exterior
Expected: Labels present and legible, all screws tight, jacks seated firmly

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Power on/off with patient connected patient safety

Risk of unintended electrical stimulation or circuit disruption if power is toggled while leads connected to patient

Ranked causes

1. Operator error turning power on or off during treatment or setup (occasional)

First check

Verify all leads disconnected from patient

Test point: Electrodes and lead cables
Expected: No leads attached to patient skin

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Premodulated stimulation output incorrect high voltage

Premodulated mode output voltage not in range or current limit exceeds maximum during high/low and alternating operations

Ranked causes

1. Premodulated output voltage out of specification (common)

First check

Measure premodulated output high/low

Test point: Output terminals
Expected: 42-55 Vpp on all channels, 42-55 Vpp
Tools: Oscilloscope

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Probe treatment interrupted by manual on/off cycle needs

Operator needs manual control during probe treatment with non-continuous duty cycle

Ranked causes

1. Non-continuous duty cycle selected for probe treatment without manual on/off control (common)

First check

Verify probe is in contact with skin during contraction cycle

Test point: Probe contact with patient skin
Expected: Probe making full contact with skin

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Russian stimulation output incorrect high voltage

Russian stim mode output voltage out of range or current limit exceeded in normal, reciprocal, or co-contraction channels

Ranked causes

1. Russian stim output voltage out of specification (common)

First check

Measure Russian stim one channel normal output

Test point: Output terminals
Expected: 42-55 Vpp on all channels, 42-55 Vpp
Tools: Oscilloscope

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Serial number mismatch or missing

Unit serial number does not match documentation or soundhead serial numbers are missing or incorrect

Ranked causes

1. Serial number not programmed or wrong unit/soundhead assembly (rare)

First check

Verify unit and soundhead serial numbers match documentation

Test point: Case labels and display menu
Expected: Serial numbers match and are legible

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Soundhead temperature too cold

Keypad unresponsive; device does not recognize soundhead presence after exposure to very cold environment

Ranked causes

1. Soundhead temperature below ~60°F (rare)

First check

Verify soundhead temperature

Test point: Soundhead crystal
Expected: Minimum ~60°F to recognize soundhead

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Soundhead temperature too hot patient safety

Temperature alert displayed during treatment; POWER display flashing (pre-1.02 software) or TIME display shows 'HOT' (software 1.02+); treatment paused automatically; output power stopped

Ranked causes

1. Poor coupling during treatment (common)

First check

Observe display for temperature alert

Test point: POWER display (pre-1.02) or TIME display (1.02+)
Expected: Flashing display (pre-1.02) or 'HOT' message (1.02+)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Stim jack loose or damaged caution

Stimulation output connector is loose, damaged, or does not seat properly preventing stimulation cable connection

Ranked causes

1. Loose or damaged stim connector (occasional)

First check

Inspect stim jack connection and tightness

Test point: Stim output connector
Expected: Jack is secure and properly seated

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Stop button not functioning patient safety

STOP button does not turn off output or remote stop feature not working properly

Ranked causes

1. Stop button circuit malfunction (occasional)

First check

Activate output and press STOP button

Test point: Output terminals
Expected: Output ceases immediately

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Treatment cannot be started or power remains at zero

Intensity display flashing, treatment will not start until power is set

Ranked causes

1. Power level not set before pressing START (common)

First check

Verify power level set

Test point: Power-Intensity display
Expected: Value between 0.1 to 2.0 w/cm2 (0.1 to 1.0 for 10cm2 head at 3MHz; 0.1 to 1.5 for 1cm2 head), varies by soundhead and frequency

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Treatment parameters not retained for future setups

Custom High Volt settings not remembered on next modality selection

Ranked causes

1. Treatment parameters not saved as defaults (common)

First check

Verify if settings should be saved as new defaults

Test point: Treatment parameter configuration
Expected: Frequently used settings identified for saving

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Ultrasound output power incorrect

Ultrasound power output does not match specified watts for given frequency and power setting across different soundhead sizes

Ranked causes

1. Ultrasound transducer degradation or output amplifier malfunction (common)

First check

Measure 5cm soundhead power at 2.5W setting 1MHz

Test point: 5cm transducer
Expected: 2.4 – 2.6 Watts, 2.4 – 2.6
Tools: Ultrasound power meter

9 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

More symptoms

Unable to start High Volt treatment

1 more symptom with ranked causes and checks are in ServiceForge. Connect ServiceForge to your AI

Error codes

Code	Meaning	Trigger	Severity
`BATT BAD`	Battery is defective or fully depleted	Battery power becomes too low to continue operating device or battery is damaged	error
`BATT LO`	Low battery power detected	Available battery power reduced to threshold level during operation	warning
`CP 0`	Coupling sensing disabled	User manually disables coupling detection during treatment	info
`CP 1`	Coupling sensing enabled	Default state or user manually enables coupling detection	info
`ERROR 13`	Soundhead connection error	Soundhead plugged in while device is powered on	error
`HEAD`	Soundhead not detected by device	Soundhead missing, disconnected, or not recognized during setup or treatment delivery	error
`HOT`	Soundhead temperature has reached maximum allowable level	Soundhead temperature rises above maximum threshold during ultrasound treatment	error
`LEAD`	Open or incomplete circuit detected on indicated channel during interferential treatment setup	Device detects an open circuit (unplugged lead, electrode not in contact, or incomplete circuit) when intensity is set to level 11 or above during interferential treatment setup	warning

Likely causes and actions for each code are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.