Defibrillator monitors

Philips HeartStart XLT: troubleshooting and error codes

The ServiceForge knowledge base holds 127 documented symptoms for the Philips HeartStart XLT, with 250 ranked causes, 240 diagnostic checks with test points and expected values, and 30 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Unit unresponsive to power commands patient safety

Unit does not power up or respond when powered on after connection to power source

Ranked causes

1. Power source voltage low (common)
2. Failure in Power Module (occasional)
3. Short in unit's 12 volt wiring (occasional)
4. Short on Power PCA (occasional)
5. Short on Control PCA (occasional)
6. Failure on Power PCA during power-up attempt (occasional)
7. Failure on Control PCA during power-up attempt (occasional)
8. Main fuse open (common)
9. Open in battery wiring (occasional)
10. Short or other failure in printer or display (occasional)
11. Short or other failure in system (rare)

First check

Connect Power Module to power source only and observe Power indicator

Test point: Power Module indicator
Expected: Power indicator turns RED or GREEN

4 more checks with pass and fail actions, 17 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Extended Self Test failure

One or more test results show Fail instead of Pass on Extended Self Test printout

Ranked causes

1. ROM test failure (rare)
2. RAM test failure (rare)
3. System integrity failure (rare)
4. Defib capacitor charge/discharge failure (occasional)
5. Front End DSP communication failure (occasional)
6. Timebase clock discrepancy (rare)

First check

Verify test load is connected to pads cable

Test point: pads cable connector
Expected: test load connected

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

Buzzing noise during audio patient safety

Buzzing or unwanted noise heard when audio tones or voice prompts are active

Ranked causes

1. Damage to speaker label (common)
2. Debris between speaker and speaker label (common)
3. Speaker hardware loose (occasional)
4. Speaker failure (occasional)
5. Control PCA failure (rare)

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

Won't charge in AED mode high voltage

Unit does not charge defibrillation capacitor when in AED mode

Ranked causes

1. Pads connector or internal wiring failure (occasional)
2. Power PCA failure (occasional)
3. Control PCA failure (occasional)
4. Interface PCA failure (occasional)
5. CHARGE key failure (occasional)

First check

Try unit in Manual Mode

Test point: Mode selector
Expected: Unit charges normally in Manual Mode

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

Won't charge in manual mode high voltage

Unit does not charge defibrillation capacitor when in manual mode

Ranked causes

1. Pads connector or internal wiring failure (occasional)
2. Power PCA failure (occasional)
3. Control PCA failure (occasional)
4. Interface PCA failure (occasional)
5. CHARGE key failure (occasional)

First check

Try unit in AED Mode

Test point: Mode selector
Expected: Unit charges normally in AED Mode

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

Leads off or ECG electrode contact loss patient safety

ECG monitoring electrodes not applied or not making proper electrical contact with patient

Ranked causes

1. Monitoring electrodes not properly applied (common)
2. ECG cable not connected (common)
3. Internal cable from ECG connector to Interface PCA disconnected (rare)
4. Failure on Interface PCA (rare)

First check

Inspect electrode placement on patient

Test point: 3- or 5-lead monitoring electrodes
Expected: Electrodes firmly adhered to skin

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

Low battery life caution

Battery depletes quickly during use

Ranked causes

1. Frequent use without adequate charging (common)
2. Battery failure (occasional)
3. Power module failure (occasional)
4. Control PCA, Power PCA, or Battery PCA failure (rare)

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

No Shock Delivered patient safety

Shock not delivered due to patient impedance out of range or pad application issue.

Ranked causes

1. Patient impedance out of range (occasional)
2. Pads not applied properly (common)
3. Defective pads (occasional)
4. Defective pads cable (rare)

First check

Verify pads properly applied to patient

Test point: Defib pads
Expected: Pads fully adhered with good skin contact

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

Noisy ECG trace - constant baseline noise

Constant noise on ECG baseline indicating possible configuration or interference issue.

Ranked causes

1. Incorrect power line frequency or filter settings (common)
2. Nearby source of constant interference (occasional)
3. ECG front end failure (rare)
4. Signal processing circuit failure (rare)

First check

Verify power line frequency setting

Test point: Configuration menu
Expected: Power line frequency set to 50 or 60 Hz matching local mains

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

Paper moves but printing is faint or absent

Printer paper advances normally but no printing or very faint printing appears on paper

Ranked causes

1. Door improperly latched (occasional)
2. Dirty printhead (common)
3. Printer failure (occasional)
4. Control PCA failure (occasional)

First check

Verify printer door is properly latched

Test point: Printer door latch
Expected: Door fully closed and latched

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

Poor SpO2 signal quality

SpO2 monitoring shows no response, no value on screen, or no pleth bar

Ranked causes

1. Bad internal connection (common)
2. SpO2 PCA failure (occasional)
3. Control PCA failure (occasional)
4. Interface PCA failure (occasional)

First check

Inspect and reseat flex cables between SpO2 connector and PCA modules

Test point: SpO2 connector to SpO2 PCA and SpO2 PCA to Interface PCA
Expected: Cables fully seated

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

Printer test failure caution

Printer does not produce proper test output or shows stuck printhead elements

Ranked causes

1. Printhead elements stuck (occasional)
2. Paper speed incorrect (occasional)
3. Character/symbol quality degraded (occasional)
4. Stray marks in test output (rare)

First check

Run Printer Test from Diagnostic menu

Test point: printer output
Expected: test patterns with diamonds, vertical bars, diagonal lines as shown in Figure 2-4

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

Audio distorted patient safety

Audio tones or voice prompts are distorted or unclear

Ranked causes

1. Damage to speaker label (common)
2. Speaker failure (occasional)
3. Control PCA failure (occasional)

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

Backlight doesn't light in dark ambient conditions

Display backlight fails to illuminate when ambient light is low

Ranked causes

1. Display failure (occasional)
2. Control PCA failure (occasional)
3. Ambient light sensor failure (occasional)

First check

Run Display Test in Diagnostic Mode and test BACKLIGHT ON and BACKLIGHT OFF softkeys

Test point: Diagnostic mode Display Test backlight controls
Expected: Backlight responds to softkey commands

1 more check with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

Charges but disarms when press shock high voltage

Unit charges successfully but disarms discharge when SHOCK key is pressed

Ranked causes

1. Patient impedance sensed as too high or too low during energy delivery (common)
2. Power PCA failure (occasional)
3. Control PCA failure (occasional)

First check

Inspect pads for proper contact and cable for damage

Test point: Pads on patient and pads cable connectors
Expected: Pads fully adhered, cable intact and properly connected

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

Data Card not recognized caution

Data card is not recognized when plugged into unit

Ranked causes

1. Unit power already on during card insertion (common)
2. Card full or unsupported type (occasional)
3. Card removed while unit power on (data corrupted) (occasional)

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

Display all white or all black

LCD display shows no response with either all white or all black screen

Ranked causes

1. Contrast misadjusted (common)
2. Control PCA failure (occasional)
3. Display failure (occasional)

First check

Adjust display contrast control

Test point: Contrast adjustment control
Expected: Display shows readable text and waveforms

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

Display blank but backlight works

LCD display is blank with no visible content even though backlight illuminates

Ranked causes

1. Bad connections involving Display Data Cable (common)
2. Display failure (occasional)
3. Control PCA failure (occasional)

First check

Inspect and reseat Display Data Cable connections

Test point: Display data cable connectors at display and Control PCA
Expected: Cables fully seated and making contact

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

Done indicator does not illuminate caution

Done indicator does not light even after extended charging (>14.5 hours)

Ranked causes

1. System/Shift Test resets charging clock (common)
2. Battery aged, worn out, or failed (occasional)
3. Power Module failure (occasional)

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

FE Extended Self Test failure

Front End (FE) failure detected during Extended Self Test.

Ranked causes

1. FE failure on Control PCA (rare)
2. FE failure on Power PCA (rare)
3. FE failure on Interface PCA (rare)

First check

Replace Control PCA and rerun Extended Self Test

Test point: Control PCA module
Expected: Extended Self Test passes without FE failure

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

Leads Off message despite cable replacement and proper connection

Leads Off error persists after ECG cable replaced and properly connected to simulator.

Ranked causes

1. Bad connection from ECG Connector to Interface PCA (common)
2. Defective ECG Connector or cable to Interface PCA (occasional)
3. Defective Interface PCA (occasional)

First check

Reconnect ECG Connector to Interface PCA cable

Test point: Cable connection at Interface PCA
Expected: Cable fully seated with no Leads Off message

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

Low battery warning tone

Repeating tone alternating between two frequencies beginning 1 minute before shutdown due to low battery charge.

Ranked causes

1. Low battery charge (common)
2. Power Module fault (occasional)
3. General service needed (rare)

First check

Check battery charge level and status

Test point: Battery compartment and charge indicator
Expected: Battery fully charged or Power Module connected

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

Main Key unresponsive (OFF, 1, 2, 3) caution

One or more main keys (OFF, 1, 2, 3) fail to respond

Ranked causes

1. Key failure (common)
2. Interface PCA failure (occasional)
3. Control PCA failure (occasional)

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

Noisy ECG trace - intermittent bursts

Intermittent bursts of noise or random spikes on ECG trace.

Ranked causes

1. Time-varying interference source (common)
2. ECG front end failure (occasional)
3. Signal processing circuit failure (rare)

First check

Identify and relocate away from interference

Test point: Patient cable routing and unit location
Expected: Cables routed away from radio transmitters, pagers, walkie-talkies, X-ray equipment

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

Other keys unresponsive (display, printer, manual/pacing) caution

Keys other than main keys fail to respond

Ranked causes

1. Key failure (common)
2. Interface PCA failure (occasional)
3. Control PCA failure (occasional)

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

Pads Off message despite cable replacement and proper connection

Pads Off error persists after cable replaced and properly connected to simulator.

Ranked causes

1. Bad connection from Patient Connector to Power PCA (common)
2. Defective Patient Connector or cable to Power PCA (occasional)
3. Defective Power PCA (occasional)

First check

Reconnect Patient Connector to Power PCA cable

Test point: Cable connection at Power PCA
Expected: Cable fully seated with no Pads Off message

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

Poor ECG signal quality patient safety

Multifunction pads not making proper contact with patient; signal shows artifacts or is too weak to detect

Ranked causes

1. Pads not properly applied or making poor contact (common)
2. Multifunction pads outdated or dried-out (common)
3. Radio frequency interference (RFI) (occasional)

First check

Visually inspect pad application and patient skin contact

Test point: Pads on patient chest
Expected: Pads fully adhered to clean, dry skin

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

Poor Leads ECG signal quality patient safety

Weak or poor quality ECG signal from leads monitoring electrodes.

Ranked causes

1. Monitoring electrodes not making proper contact with patient (common)
2. Electrodes outdated or dried out (common)
3. Radio frequency interference (RFI) (occasional)

First check

Verify electrode placement and skin contact

Test point: Patient body and electrode pads
Expected: Electrodes properly applied with good skin contact

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

QRS beeper inaudible or irregular

QRS beeper does not sound or beeps do not occur with each QRS complex

Ranked causes

1. QRS beeper is configured to Off (common)
2. Volume set too low (common)
3. QRS complex amplitude too small to detect (occasional)

First check

Verify QRS beeper configuration in menu settings

Test point: Unit menu display
Expected: QRS beeper set to On

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

Service Unit message during Shift/System Check

Service Unit message appears during Shift/System Check indicating maintenance required.

Ranked causes

1. Data Card failure (occasional)
2. Lithium battery failure (occasional)
3. Control PCA failure (occasional)

First check

Inspect and replace Data Card

Test point: Data Card slot
Expected: New empty M3510A/M5510A Data Card inserted

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

Unit does not respond to power-on patient safety

No sounds, no display changes, no LED activity when power button pressed after battery insertion

Ranked causes

1. Discharged or defective battery (common)
2. Defective Data Card (occasional)
3. Defective Control PCA (occasional)

First check

Verify battery charge level and condition

Test point: Battery M3516A/M5516A
Expected: Fully charged, undamaged

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

Unsupported Battery message displayed caution

Display shows 'Unsupported Battery' message on screen

Ranked causes

1. Not an M3516A battery installed (common)
2. Battery damage (occasional)
3. Battery PCA failure (occasional)

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

Won't discharge high voltage

Unit charges but does not deliver shock when SHOCK key is pressed

Ranked causes

1. Control PCA failure (occasional)
2. Interface PCA failure (occasional)
3. SHOCK key failure (occasional)

First check

Run Controls Test in diagnostic mode and test SHOCK key

Test point: Diagnostic mode Controls Test
Expected: SHOCK key responds to test

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

Attach Pads message patient safety

Multifunction defib electrode pads are not making proper contact with patient.

Ranked causes

1. Pads not applied to patient (common)
2. Pads worn or defective (occasional)

First check

Verify pad contact and placement

Test point: Defib pads on patient chest
Expected: Pads fully adhered to patient skin per package directions

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

Audio test failure

Tones or voice prompts not produced or incorrect during Audio Test

Ranked causes

1. Audio amplifier or speaker malfunction (occasional)
2. Voice prompt encoder malfunction (occasional)

First check

Run Audio Test and select Message Alert

Test point: unit speakers
Expected: repeating series of 3 short tones followed by pause

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

Battery fails Capacity Test caution

Battery does not pass Battery Capacity Test

Ranked causes

1. Battery aged, worn out, or failed (common)
2. Control PCA failure (occasional)

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

Black line running along paper

Printer output shows continuous black line running along length of paper

Ranked causes

1. Dots (printhead elements) stuck on (occasional)
2. Control PCA failure (occasional)

First check

Print test pattern and observe output

Test point: Printer output
Expected: No continuous black line on paper

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

Charges but disarms spontaneously high voltage

Unit charges successfully but disarms discharge without operator pressing SHOCK key

Ranked causes

1. Unit sensed Pads Off or Cable Off (common)
2. DISARM key failure (intermittent) (occasional)

First check

Inspect pads and cable connections

Test point: Pads on patient and pads cable connectors
Expected: Pads fully adhered, cable firmly connected

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

Charges slowly

Defibrillator charges in 4-5 seconds instead of normal 2-3 seconds

Ranked causes

1. Battery too old or not fully charged (common)
2. Unit senses unsupported battery (occasional)

First check

Verify battery is fully charged and recent date

Test point: Battery status and date code
Expected: Full charge, recent manufacture date

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

Check Printer message

Printer paper absent, jammed, or printer door not closed properly.

Ranked causes

1. Printer paper absent or jammed (common)
2. Printer door not closed properly (occasional)

First check

Check printer paper status

Test point: Paper compartment
Expected: Paper loaded and not jammed

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

Contrast does not adjust for ambient temperature

Display contrast does not automatically adjust when ambient temperature changes

Ranked causes

1. Display failure (occasional)
2. Control PCA failure (occasional)

First check

Verify automatic contrast adjustment feature in menu settings

Test point: Unit menu display settings
Expected: Automatic contrast adjustment enabled and functioning

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

Data Card Full message

Incident duration exceeds 2 hours, causing Data Card to reach capacity.

Ranked causes

1. Incident exceeds 2 hours duration (occasional)
2. Empty Data Card not inserted for incident (occasional)

First check

Verify Data Card capacity before incident

Test point: Data Card
Expected: Empty M3510A/M5510A Data Card inserted

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

Data Card test failure caution

Data Card fails test in Diagnostic Mode

Ranked causes

1. Card full or unsupported type (common)
2. Control PCA failure (occasional)

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

Defib Disarmed message patient safety

Defibrillator disarmed due to compromised pad connection or mode change during charge.

Ranked causes

1. Pad connection compromised (common)
2. Mode changed from Manual to AED while charged (occasional)

First check

Verify pad contact with patient

Test point: Defib pads
Expected: Pads in proper contact with patient skin

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

Display test failure

Display does not cycle through colors or backlight does not respond

Ranked causes

1. Display backlight malfunction (occasional)
2. Ambient light sensor blocked or faulty (occasional)

First check

Run Display Test from Diagnostic menu

Test point: display
Expected: completely dark, then completely light, then black vertical bar scrolls left to right

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

ECG amplifier noise verification patient safety

Measuring noise floor of Pads and Leads ECG amplifiers with simulator off or disconnected to verify noise performance

Ranked causes

1. Periodic verification of amplifier noise performance required during performance verification (common)
2. Electromagnetic interference from external sources (occasional)

First check

Measure Leads input noise floor

Test point: Leads ECG input (Lead II), Diagnostic noise reading
Expected: 0 + 30 uV, +30
Tools: DMM or diagnostic display, simulator off

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

ECG controls do not respond

One or more ECG control functions do not respond (e.g., select lead or ECG size).

Ranked causes

1. Failure in keypress detection/processing (common)
2. Failure in keys/connections (occasional)

First check

Replace Control PCA and test ECG controls

Test point: Control PCA module and keypad
Expected: ECG control functions respond to key presses

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

ECG test display issues

ECG Test displays incorrect Lead selection, AC Line Filter setting, or Front End status

Ranked causes

1. Incorrect AC Line Filter setting for region (common)
2. PCI setting enabled (rare)

First check

Verify AC Line Filter setting matches local power frequency

Test point: ECG Test display AC Line Filter field
Expected: 50 Hz in 50 Hz areas; 60 Hz in 60 Hz areas

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

ECG trace distorted patient safety

Distorted ECG waveform on display.

Ranked causes

1. ECG front end failure (occasional)
2. Signal processing circuit failure (rare)

First check

Replace ECG front end PCA

Test point: Power PCA (pads) or Interface PCA (leads)
Expected: ECG trace clear and undistorted

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

Flat line ECG - no waveform, no Leads Off or Pads Off message patient safety

No ECG waveform displayed with no Leads Off or Pads Off error message.

Ranked causes

1. Short in internal ECG wiring or front end (occasional)
2. Signal processing circuit failure (rare)

First check

Replace ECG front end PCA

Test point: Power PCA (pads) or Interface PCA (leads)
Expected: ECG waveform appears on display

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

No audio output patient safety

No audio tones or voice prompts heard

Ranked causes

1. Speaker failure (common)
2. Control PCA failure (occasional)

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

Pads cable disconnected from defibrillator patient safety

Pads cable connector not connected to defibrillator unit

Ranked causes

1. Pads cable connector not locked in place (common)
2. Failure on Power PCA (rare)

First check

Inspect pads cable connector

Test point: Pads cable connector at defibrillator
Expected: Connector fully seated and locked

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

Pads not making proper contact with patient patient safety

Defibrillation pads applied but not making adequate electrical contact with patient skin

Ranked causes

1. Pads not properly applied to patient skin (common)
2. Failure on Power PCA (rare)

First check

Inspect pads application to patient

Test point: Defibrillation pads on patient chest
Expected: Pads firmly adhered with full skin contact

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

Paper moves but print quality poor or dots missing

Printer paper advances but printing is incomplete with missing dots or poor quality output

Ranked causes

1. Dirty printhead (common)
2. Printer failure (occasional)

First check

Inspect printhead for dirt or debris

Test point: Printer printhead
Expected: Printhead clean and all elements clear

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

Paper moves then stops

Printer paper advances initially but stops during printing operation

Ranked causes

1. Door improperly latched (common)
2. Paper improperly loaded or jammed (common)

First check

Verify printer door is properly latched

Test point: Printer door latch
Expected: Door fully closed and latched

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

Paper won't move

Printer paper does not advance during printing operation

Ranked causes

1. Paper improperly loaded or jammed, or paper is wet (common)
2. Printer failure (occasional)

First check

Inspect paper loading and jam condition

Test point: Printer paper path
Expected: Paper properly loaded, no jams, paper is dry

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

SpO2 Extended Self Test failure

SpO2 failure detected on SpO2 PCA or Control PCA during Extended Self Test.

Ranked causes

1. SpO2 failure on SpO2 PCA (rare)
2. SpO2 failure on Control PCA (rare)

First check

Replace SpO2 PCA and rerun Extended Self Test

Test point: SpO2 PCA module
Expected: Extended Self Test passes without SpO2 failure

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

SpO2 noisy signal

Excessive noise in SpO2 reading due to patient movement, electrical interference, or optical interference.

Ranked causes

1. Excessive patient movement (common)
2. Electrical or optical interference (common)

First check

Observe patient movement and sensor placement

Test point: Sensor site
Expected: Minimal movement at application site

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

SpO2 sensor fail

SpO2 cable not connected to device or cable/sensor is broken.

Ranked causes

1. SpO2 cable not connected (common)
2. SpO2 cable or sensor broken (occasional)

First check

Verify SpO2 cable connection

Test point: M3500B/M5500B SpO2 connector
Expected: Cable firmly seated at connector

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

Unit fails display test (ambient light readings)

Display diagnostic test fails on ambient light sensor readings

Ranked causes

1. Control PCA failure (occasional)
2. Interface PCA failure (occasional)

First check

Run Display Test in diagnostic mode focusing on ambient light channel

Test point: Diagnostic mode Display Test ambient light sensor
Expected: Ambient light readings respond to light level changes

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

More symptoms

Unit fails display test (backlight)
Unit fails display test in diagnostic mode (general)
Unit fails printer test in diagnostic mode
Unit powers up with error message or blank screen
Waveforms or text distorted on printout
White line running along paper
Attach Leads message
Battery capacity test failure
Charging indicator does not illuminate
CODEC Extended Self Test failure
Configuration lost or reset
Data Card disabled or not recognized
Data Card Extended Self Test failure
Data Card Interrupted message
Data Card Not In Service message
Defib Extended Self Test failure
Defibrillator Disarm test
Defibrillator disarm test failure
Defibrillator energy delivery verification (AC Power)
Defibrillator energy delivery verification (Battery Power)
Defibrillator subsystem failure
Defibrillator test with AC power module
Defibrillator test with battery power
Earth Leakage Current test (AC power module)
Earth leakage exceeds limit
ECG amplifier gain verification
ECG data acquisition system failure
Incompatible Data Card message
IRDA Extended Self Test failure
Key Inactive message
Loud buzzing or grinding noise from printer
Low battery warning
Monitor failure or subsystem error
No Data Card Present tone
No defibrillation pads detected
Noisy ECG trace - low frequency periodic
Normal power on sequence tone
Pacer Extended Self Test failure
Pacer output below specification
Pacing function verification
Pads cable not properly attached
Patient Contact Impedance (PCI) function verification
Patient lead leakage exceeds limit
Patient Lead Leakage test - Defibrillator pads
Patient Lead Leakage test - ECG cable
Patient Lead Leakage test - SPO2 cable
Printer paper jam or wet paper in printer
RAM Extended Self Test failure
ROM Extended Self Test failure
SHOCK button not pressed within 30 seconds of charge
SpO2 cable not connected
SpO2 circuitry failure
SpO2 sensor ambient light interference
SpO2 signal too low for accurate reading
SpO2 signal too weak or absent
Stop Pacer message
System Extended Self Test failure
System Failure - Cycle Power
System failure continuous beep tone
System failure requiring service
Timebase Extended Self Test failure
Tones present but no voice prompt (AED Mode)
Unit fails ECG test in diagnostic mode (leads)
Unit fails ECG test in diagnostic mode (pads)
Unit has minimal power response
Unsupported battery detected
Voice prompt present but no tones

67 more symptoms with ranked causes and checks are in ServiceForge. Connect ServiceForge to your AI

Error codes

Code	Meaning	Trigger	Severity
`00000 - 00400`	Defibrillator failure in charging circuits	Charging circuit malfunction detected during operation or self-test	critical
`01000`	Defibrillator failure in biphasic processor	Biphasic waveform processing error detected	critical
`02000`	Leads front end failure	ECG signal acquisition circuitry failure detected	error
`04000`	Pacing system failure	Pacing output or control circuitry failure detected	error
`08000`	Processor error	CPU or processor malfunction detected	error
`10000 - 1FFFF`	System monitor failure	Monitoring subsystem fault detected	warning
`10001`	Processor synchronization error	Processor clock or timing synchronization fault	warning
`10004`	Synchronization timeout	Processor failed to synchronize within timeout period	warning
`20000 - 2FFFF`	Front end failure	Signal acquisition front end circuit failure	error
`30000 - 3FFFF`	Pacing system failure	Pacer circuitry or output failure	error
`40000 - 4FFFF`	Monitor processor failure	Monitoring processor circuit failure	error
`50000 - 5FFFF`	SpO2 system problem	SpO2 sensor or measurement circuit failure	warning
`60000 - 6FFFF`	Advisory system failure	Advisory message generation circuit failure	warning
`80000 - 8FFFF`	IRDA (infrared) communication failure	Infrared communication interface malfunction	warning
`90000 - 90002`	Self-test failure in RAM/ROM or gate array	Memory or gate array self-test failed	error
`90003`	Self-test failure in data card circuits	Data card interface circuit self-test failed	error
`90004 and 90005`	Self-test failure in codec or time base	Audio codec or timing circuit self-test failed	error
`90006`	Self-test failure in SpO2 circuitry	SpO2 measurement circuit self-test failed	warning
`90007 and 90008`	Self-test failure in pacer or defibrillator	Pacer or defibrillator circuit self-test failed or operator touched unit during test	error
`90009`	Self-test failure in front end	Signal acquisition front end self-test failed	error
`9000A`	Lithium backup battery failure	Backup battery voltage out of specification or failed	warning
`A0000 - A7FFF`	Data card failure	Data card read/write or interface failure	error
`A8000 - AFFFF`	Data archival error	Data storage or retrieval from card failed	warning
`B0000 - BFFFF`	Audio system failure	Audio amplifier or speaker circuitry failure	warning
`F0000 - FFFFF`	RAM or ROM memory failure	Main system memory self-test failure	critical
`F0002`	Promo mode failure	Demonstration or promotional mode circuitry failure	warning
`F0003`	Keyscanner failure	Keyboard scanning circuit malfunction	error
`F0004`	System communication error	Internal system bus or communication protocol failure	critical
`F0007`	System communication error	Transient or intermittent communication protocol failure	warning
`System Log errors`	Hardware or firmware errors detected and logged by system	Error conditions detected during unit operation	unknown

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.