Test equipment telemetry transmitters

GE Healthcare ApexPro: troubleshooting and error codes

The ServiceForge knowledge base holds 59 documented symptoms for the GE Healthcare ApexPro, with 83 ranked causes, 114 diagnostic checks with test points and expected values, and 0 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Apex Oximeter SpO2 parameter not displayed

SpO2 parameter box does not appear on Clinical Information Center after connecting oximeter to transmitter and admitting to system

Ranked causes

1. Oximeter not properly connected to transmitter (common)
2. Transmitter not admitted to ApexPro telemetry system (occasional)
3. Oximeter hardware or firmware fault (rare)

First check

Verify oximeter serial number recorded

Test point: Oximeter label
Expected: Serial number documented

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

Frequent lead fail events

Lead fail alarms occurring regularly during transmitter operation

Ranked causes

1. Leadwire damage from wrapping or handling (common)
2. Leadwire internal damage or brittleness (common)
3. Improper patient electrode preparation (occasional)

First check

Inspect leadwires for visible damage, kinks or brittle areas

Test point: Entire leadwire set
Expected: No cracks, breaks or sharp bends visible

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

No SpO2 Data message

Clinical Information Center displays 'No SpO2 Data' message

Ranked causes

1. ApexPro transmitter not used or transmitter not configured for SpO2 (common)
2. Oximeter disconnected from transmitter (common)
3. Patient out of antenna range (occasional)

First check

Verify oximeter connection to transmitter

Test point: Oximeter connector
Expected: Oximeter firmly connected to transmitter

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

Nonin Xpod Oximeter not transmitting data patient safety

Oximeter connected but SpO2 data not appearing at Clinical Information Center

Ranked causes

1. SpO2 probe not connected to oximeter (common)
2. Oximeter not connected to transmitter (common)
3. Wrong probe type installed (occasional)

First check

Verify SpO2 probe connection to oximeter

Test point: 8-pin connector on oximeter
Expected: Nonin SpO2 probe connected to 8-pin connector

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

Short battery life in Apex Oximeter

Oximeter battery depletes faster than expected; low battery indicator appears

Ranked causes

1. Used or expired batteries installed (common)
2. Rechargeable batteries used instead of alkaline (occasional)
3. Battery beyond expiration date (occasional)

First check

Verify battery type and expiration date

Test point: Battery compartment
Expected: New alkaline AA batteries within expiration date installed

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

Short battery life in transmitter

Transmitter operates for less than expected duration on batteries

Ranked causes

1. Used or expired batteries installed (common)
2. Rechargeable batteries used instead of alkaline (occasional)
3. Battery beyond expiration date (occasional)

First check

Verify battery type and status

Test point: Battery compartment
Expected: New alkaline AA batteries within expiration date

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

Waveform dropout

Periodic loss of waveform signal on the display

Ranked causes

1. Transmitter out of antenna range (common)
2. External RF interference (occasional)
3. Defective transmitter (occasional)

First check

Determine type of dropout by enabling flags

Test point: RF Signal Integrity flags on page 4-16
Expected: Flags indicate type of dropout

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

Accutracker does not transmit or receive data correctly

Accutracker display numbers do not match display numbers on Clinical Information Center screen during communication test

Ranked causes

1. Transmitter-receiver communication link failure (unknown)
2. ECG leads or shorting cable not attached to transmitter (occasional)

First check

Verify ECG leads or shorting cable attached to transmitter

Test point: ApexPro Telemetry system ECG input
Expected: ECG leads with shorting cable or simulator connected

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

Accutracker self-test does not complete or fails

Unit does not display TEST PASSED after diagnostic self-test, or unable to abort reading when OFFICE SELF TEST displays

Ranked causes

1. Pump or valve circuit malfunction (unknown)
2. Reading abort function not responding (occasional)

First check

Turn off Accutracker and wait 5 seconds

Test point: Accutracker power
Expected: Unit powered off, wait 5 seconds to prevent lockup

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

Apex Oximeter does not power on

Unit does not respond to power button press; no LED or display indication

Ranked causes

1. Batteries not installed or depleted (common)
2. Battery polarity reversed (occasional)

First check

Verify batteries present and fresh

Test point: Battery compartment
Expected: 2 new AA alkaline batteries installed

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

Apex Oximeter weak or poor SpO2 signal patient safety

Perfusion LED indicates weak or very poor quality SpO2 signal; red LED indication

Ranked causes

1. Poor SpO2 probe contact or signal quality (common)
2. Marginal signal quality (occasional)

First check

Observe perfusion LED color

Test point: Perfusion LED indicator
Expected: Green indicates acceptable signal strength

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

Check Probe message on oximeter

Clinical Information Center displays 'Check Probe' message from oximeter

Ranked causes

1. Probe disconnected from oximeter (common)
2. Probe sensor defective (occasional)

First check

Verify probe connection to oximeter

Test point: Probe connector
Expected: Probe firmly connected to oximeter

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

ECG signal gain incorrect

Graph output signal level does not measure 1 cm for 1 mV input when gain set to 1X

Ranked causes

1. ECG gain setting not at 1X (common)
2. Transmitter/receiver system signal attenuation (occasional)

First check

Verify ECG simulator connected

Test point: Transmitter input
Expected: ECG simulator connected

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

Low Quality Signal message on oximeter

Clinical Information Center displays 'Low Quality Signal' message from oximeter

Ranked causes

1. Poor patient connection or probe placement (common)
2. Probe sensor defective (occasional)

First check

Verify probe attachment to patient

Test point: Probe placement on patient
Expected: Probe properly secured to patient

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

Pacemaker not detected or transmitted

Pace pulse triggered at ECG simulator but pace mark does not appear on Clinical Information Center display

Ranked causes

1. PACE function not enabled on Clinical Information Center (common)
2. ECG simulator not connected or not generating pace pulse (occasional)

First check

Verify ECG waveforms displaying on Clinical Information Center

Test point: Clinical Information Center display
Expected: ECG waveforms visible

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

Probe Off message on oximeter

Clinical Information Center displays 'Probe Off' message from oximeter

Ranked causes

1. Probe not attached to patient (common)
2. Sensor defective (occasional)

First check

Verify probe attachment to patient

Test point: Probe placement
Expected: Probe attached to patient skin

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

Saturation value is 'x' message on oximeter

Clinical Information Center displays 'The Saturation Value is x' message lasting up to 3 minutes

Ranked causes

1. Patient out of antenna range (common)
2. Oximeter disconnected from transmitter (common)

First check

Verify oximeter connection to transmitter

Test point: Oximeter connector
Expected: Oximeter firmly connected to transmitter

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

Accutracker hardware time-out or system leak exceeds specification

Hardware time-out does not occur at 3 minutes ±45 seconds, or system leaks more than 2 mmHg per minute

Ranked causes

1. Hardware time-out circuit malfunction or system leak in cuff/tubing (unknown)

First check

Re-enter technical calibrate mode

Test point: Accutracker power button
Expected: Unit in Technical Calibrate mode; no external pressure applied

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

Accutracker LCD display does not show version information on startup

Hardware version, software version, gain setting, or pressure setting not displayed during startup when power button held while powering on

Ranked causes

1. Display or microprocessor fault (unknown)

First check

Power on Accutracker with button held

Test point: Accutracker power button and LCD display
Expected: Startup display shows hardware version, software version, gain setting, and pressure setting in mmHg

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

Accutracker over-pressure circuit does not release caution

Valve #1 does not open and pressure does not release when 285 mmHg is applied to pressure transducer

Ranked causes

1. Over-pressure release circuit failure (unknown)

First check

Re-enter technical calibrate mode

Test point: Accutracker power button
Expected: Unit in Technical Calibrate mode; no external pressure applied

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

Accutracker pressure reading exceeds tolerance

Pressure display differs by more than +/– 2 mmHg from mercury column or PDM200 reference at any test point (0–250 mmHg in 50 mmHg increments)

Ranked causes

1. Pressure transducer calibration drift or fault (unknown)

First check

Connect PDM200 or Mercury manometer to patient cable/cuff

Test point: Accutracker patient cable/cuff connection
Expected: Manometer connected; no external pressure applied to Accutracker

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

Apex Oximeter CHECK PROBE message not displayed after disconnect

CHECK PROBE message does not appear on Clinical Information Center when oximeter is disconnected from simulator

Ranked causes

1. Communication fault between oximeter and Clinical Information Center (unknown)

First check

Disconnect oximeter from simulator

Test point: Oximeter simulator cable
Expected: Cable disconnected

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

Apex Oximeter display does not turn on

Digital display remains off after powering up unit or pressing Display On/Off button

Ranked causes

1. Display in power-save mode after one minute timeout (common)

First check

Observe power LED status

Test point: Power LED in upper left corner of display area
Expected: Flashing power LED indicates unit powered on

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

Apex Oximeter display flashing

Digital display on Apex Oximeter starts flashing, indicating low battery reserve power remaining

Ranked causes

1. Batteries depleted (common)

First check

Observe digital display flashing pattern

Test point: Digital display
Expected: Digital display starts flashing when battery reserve depleted

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

Apex Oximeter perfusion indication incorrect

Perfusion LED does not change to yellow when selector switch changed to Ohmeda mode

Ranked causes

1. Perfusion LED fault or sensor malfunction (unknown)

First check

Set simulator selector switch to Ohmeda

Test point: Simulator selector switch
Expected: Switch in Ohmeda position

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

Apex Oximeter powerup sequence abnormal

Display and perfusion LED do not cycle through specified sequence on startup; may indicate software or hardware failure

Ranked causes

1. Software or display controller malfunction (unknown)

First check

Observe display shows 888 888 with red perfusion LED

Test point: Display and perfusion LED
Expected: 888 888 display and red perfusion LED for approximately 1 second

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

Battery contacts dirty or corroded caution

Battery contacts show dirt, corrosion, or oxidation in battery compartment

Ranked causes

1. Corrosion or dirt accumulation on contacts (occasional)

First check

Open battery compartment and inspect contacts

Test point: battery compartment contacts
Expected: contacts clean and free of corrosion or dirt

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

Carrier frequency out of tolerance

Transmitter center frequency deviates more than ±650Hz from assigned frequency when measured with manufacturing code active

Ranked causes

1. Frequency synthesizer malfunction or calibration drift (rare)

First check

Manufacturing code activation

Test point: Interface connector pins 2 and 4
Expected: Pins shorted; transmitter outputs test pattern for frequency measurement

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

Change Battery LED flashing

LED indicator on transmitter flashes to indicate low battery power; approximately one hour of reserve power remains before unit shuts down

Ranked causes

1. Battery power depleted (common)

First check

Observe Change Battery LED indicator status

Test point: Change Battery LED on transmitter
Expected: LED flashing indicates low battery

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

Dust covers loose or missing caution

Dust covers on transmitter ports not securely attached or missing

Ranked causes

1. Dust covers not properly attached (occasional)

First check

Inspect dust covers for secure attachment

Test point: all dust cover locations
Expected: all dust covers securely attached

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

Environmental seals compromised patient safety

Case seals opened or damaged, potentially from impact or drop

Ranked causes

1. Unit dropped or impacted (unknown)

First check

Inspect case seals for opening or damage

Test point: all case seals
Expected: seals intact and properly sealed

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

Graph button not functioning

Pressing Graph button does not trigger graph run at configured printer device; LEDs do not acknowledge button press

Ranked causes

1. Graph button circuit malfunction or CIC printer not configured (common)

First check

LED acknowledgment of Graph button press

Test point: LEAD STATUS and CHANGE BATTERY LEDs
Expected: Both LEDs flash twice when Graph button pressed

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

LA LED flashes rapidly after power-up

Only the LA LED flashes rapidly when transmitter is powered on

Ranked causes

1. Manufacturing/service code in EEPROM erased or corrupted (common)

First check

Power cycle transmitter and observe LED status

Test point: LA LED indicator
Expected: LA LED flashes rapidly only

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

Lead fail detection not functioning patient safety

Transmitter does not detect open or disconnected leadwires; lead status LEDs do not indicate failure; CIC does not show lead fail status

Ranked causes

1. Lead sensing circuit malfunction or software error (common)

First check

Initial ECG signal reception

Test point: Clinical Information Center waveform display
Expected: ECG signals display at CIC after transmitter admitted to receiver

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

Leadwire connector pins corroded or bent caution

Leadwire connection pins show corrosion, oxidation, or physical bending

Ranked causes

1. Corrosion or oxidation on connector pins (occasional)

First check

Inspect leadwire connector pins for corrosion or bending

Test point: leadwire connectors
Expected: pins clean, straight, and free of corrosion

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

Leadwires cracked or damaged caution

Leadwires have visible cracks, damage, or reduced flexibility

Ranked causes

1. Physical damage or material degradation (occasional)

First check

Inspect leadwires for cracks, damage, or loss of flexibility

Test point: entire length of leadwires
Expected: leadwires intact, flexible, and undamaged

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

LED Displays not operating

LEAD STATUS, CHANGE BATTERY, or PAUSE ALARM LEDs do not flash or illuminate as expected during button press or power-up

Ranked causes

1. LED circuit malfunction or loose connections (unknown)

First check

LED response to button press

Test point: LEAD STATUS and CHANGE BATTERY LEDs
Expected: Flash twice when VERIFY LEADS and GRAPH buttons pressed simultaneously, then PAUSE ALARM LED flashes

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

Low battery condition not detected caution

CHANGE BATTERY LED does not flash when battery voltage drops below 1.9V; low battery message not displayed at Clinical Information Center

Ranked causes

1. Low battery detection circuit malfunction or battery voltage not reaching threshold (common)

First check

Transmitter startup voltage

Test point: Battery voltage input
Expected: 2.3V minimum to start transmitter

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

Low battery message displays on Accutracker

Low Batt message appears on the Accutracker DX monitor display

Ranked causes

1. AA batteries depleted (common)

First check

Observe Low Batt message on Accutracker display

Test point: Accutracker monitor display
Expected: Low Batt message visible

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

Membrane switch cracked or damaged caution

GRAPH and VERIFY LEADS control membrane visibly cracked or damaged

Ranked causes

1. Physical damage to membrane (unknown)

First check

Inspect membrane switch for cracks or damage

Test point: GRAPH and VERIFY LEADS membrane controls
Expected: membrane intact without cracks or damage

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

Membrane switch label loose or missing caution

Membrane switch label not securely attached to transmitter case

Ranked causes

1. Label not properly attached (occasional)

First check

Verify membrane switch label secure attachment

Test point: membrane switch label
Expected: label securely attached to case

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

Moisture detected in battery compartment patient safety

Visible signs of moisture or water inside the battery compartment

Ranked causes

1. Water ingress into unsealed battery compartment (rare)

First check

Inspect battery compartment for visible moisture

Test point: inside battery compartment
Expected: no visible moisture or water

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

Nonin Xpod Oximeter CHECK PROBE message not displayed after disconnect

CHECK PROBE message does not appear on Clinical Information Center when Nonin Xpod oximeter is disconnected from simulator

Ranked causes

1. Communication fault between Nonin Xpod and Clinical Information Center (unknown)

First check

Disconnect Nonin Xpod oximeter from simulator

Test point: Oximeter simulator cable
Expected: Cable disconnected

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

Nonin Xpod Oximeter short battery life in transmitter

ApexPro transmitter battery depletes faster when Nonin Xpod Oximeter connected

Ranked causes

1. Nonin Xpod draws power from transmitter battery (common)

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

Oximeter heart rate accuracy out of tolerance

Heart rate measurement at simulator does not meet specified accuracy at test rates (70, 100, 160 BPM)

Ranked causes

1. Oximeter sensor or signal processing fault (unknown)

First check

Place Apex Oximeter in continuous display mode

Test point: Oximeter Display On/Off switch
Expected: Continuous display mode active

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

Pause Alarm LED does not flash

LED should flash for programmed period (typically 5 min) after pressing Graph and Verify Leads buttons simultaneously

Ranked causes

1. Transmitter not entering PAUSE ALARMS condition (unknown)

First check

Verify Graph and Verify Leads buttons respond

Test point: Transmitter buttons
Expected: LEAD STATUS and Change Battery LEDs flash twice

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

Power shuts off during leads fail

RF output amplifier power automatically shuts down when all leads are disconnected or fail for more than approximately six seconds. Power resumes about one second after leads are reconnected.

Ranked causes

1. All leads disconnected or failed for >6 seconds (common)

First check

Verify all leads are connected

Test point: Patient lead connectors
Expected: All leads securely seated

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

Powerup selftests not completing

Transmitter does not perform memory, frequency synthesizer, or LED startup sequence tests after battery installation

Ranked causes

1. Battery installation issue or selftest failure (common)

First check

Memory and frequency synthesizer selftest

Test point: Transmitter power-up sequence
Expected: Transmitter performs memory test, frequency synthesizer test, and LED startup sequence; begins normal operation

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

RA LED flashes rapidly after power-up

Only the RA LED flashes rapidly when transmitter is powered on

Ranked causes

1. Application code in EEPROM erased or corrupted (common)

First check

Power cycle transmitter and observe LED status

Test point: RA LED indicator
Expected: RA LED flashes rapidly only

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

RF power not reducing on lead failure

Transmitter does not reduce RF output when all leads fail for more than six seconds; NO TELEM signal does not display at Clinical Information Center

Ranked causes

1. RF power shutdown circuit malfunction (unknown)

First check

NO TELEM signal display after lead failure

Test point: Clinical Information Center display
Expected: NO TELEM signal appears after six seconds of all-leads-fail condition

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

RF power output out of specification

Transmitter RF power output measured at RF monitor does not meet minimum -20dBm specification

Ranked causes

1. RF power amplifier malfunction or transmitter in leads-fail condition (common)

First check

RF monitor temperature stabilization

Test point: RF service monitor equipment
Expected: Operate for at least 15 minutes before measurement

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

RF signal integrity poor or dropout observed patient safety

ECG waveform signal breakup or dropout observed on receiver when transmitter is connected to ECG simulator; waveform data missing on one or more admitted beds

Ranked causes

1. RF signal integrity issue caused by transmitter malfunction (occasional)

First check

Diagnostic color mark interpretation

Test point: Clinical Information Center waveform display bottom
Expected: No ECG signal breakup on any waveforms; if dropout present, identify color (Yellow=transmitter data missing, Dark Green=receiver data missing, Magenta=receiver system data missing, Orange=hardware manager data missing, Light Gray=invalid telemetry data)

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

Single lead displayed with multi-lead cable connected

Multi-lead cable connected but only one lead appears on Clinical Information Center

Ranked causes

1. Transmitter configured for single lead use (common)

First check

Review transmitter feature configuration

Test point: Transmitter settings
Expected: Multi-lead configuration enabled

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

Transmitter case cracked or damaged patient safety

Visual cracks or physical damage visible on the transmitter case

Ranked causes

1. Physical damage or impact to case (unknown)

First check

Inspect transmitter case for cracks or damage

Test point: entire case exterior
Expected: no cracks or visible damage

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

Transmitter configuration does not match appearance patient safety

Transmitter labels and interface connector port dust cover colors do not match enabled features

Ranked causes

1. Configuration mismatch or incorrect labeling (rare)

First check

Observe startup LED sequence

Test point: LEDs during power-up (second flash)
Expected: LED pattern matches transmitter configuration

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

Transmitter EEPROM test fails at powerup

EEPROM test loops continuously on failure; transmitter does not proceed to frequency synthesizer test

Ranked causes

1. EEPROM failure in transmitter circuit (unknown)

First check

Observe LED behavior at powerup after RAM test passes

Test point: Transmitter case LEDs
Expected: LED sequence should progress past EEPROM test phase

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

Transmitter frequency synthesizer lock test fails at powerup

Frequency synthesizer fails to lock on specified customer frequency; transmitter resets itself

Ranked causes

1. Frequency synthesizer circuit failure or lock circuit malfunction (unknown)

First check

Observe LED behavior at powerup after EEPROM test passes

Test point: Transmitter case LEDs
Expected: LED sequence should complete synthesizer lock and proceed to normal operation

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

Transmitter RAM test fails at powerup

RAM test in digital signal processor loops continuously on failure; transmitter does not proceed to EEPROM test

Ranked causes

1. RAM failure in digital signal processor circuit (unknown)

First check

Observe LED behavior at powerup after battery installation

Test point: Transmitter case LEDs
Expected: LED sequence should progress past RAM test phase

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

TTX label missing or inaccurate patient safety

TTX label not present on transmitter or recorded data does not match programmed TTX number

Ranked causes

1. Label missing or data mismatch with programmed value (unknown)

First check

Verify TTX label is present

Test point: transmitter case label area
Expected: TTX label present and readable

1 more check with pass and fail actions, 1 corrective action, and part numbers 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.