Test equipment fluoroscopy tables

Quantum Medical Imaging QT-711: troubleshooting and error codes

The ServiceForge knowledge base holds 42 documented symptoms for the Quantum Medical Imaging QT-711, with 67 ranked causes, 71 diagnostic checks with test points and expected values, and 4 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Table fails to elevate or descend patient safety

Tabletop will not move up or down; may be inhibited by laser obstruction or mechanical block; audible alerts and error codes displayed on Charge Level Indicator

Ranked causes

1. Mechanical obstruction blocking tabletop (common)
2. Laser beam obstruction during downward motion (common)
3. Emergency Stop switch engaged (occasional)
4. Battery nearly discharged (common)
5. Programmed Height mode restricted (occasional)
6. Hardware error in left tower (occasional)
7. Hardware error in right tower (occasional)
8. Communications error between towers (occasional)
9. 5 Volt supply out of range (occasional)
10. 24 Volt supply out of range (occasional)
11. 18 Volt supply out of range (occasional)
12. Mismatched potentiometer error (occasional)
13. Mismatched motors in tower (occasional)
14. Tilt error between towers (occasional)
15. Battery communication error (occasional)

First check

Observe Emergency Stop LED status

Test point: Red LED indicator on Emergency Stop switch
Expected: LED OFF indicates system not in Emergency Stop

3 more checks with pass and fail actions, 15 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

24 Volt Error

System displays 24 Volt Error, typically indicating low or unstable 24 VDC supply voltage from batteries or charger on fluoroscopy table control board.

Ranked causes

1. Charger not connected or batteries insufficiently charged (common)
2. Battery voltage below minimum threshold (common)
3. Dead cells in one or more batteries (occasional)
4. Control board power supply failure (occasional)

First check

Verify charger connection status

Test point: Power input
Expected: Charger plugged in and powered

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

Calibration: Special calibration procedure patient safety

Factory-level calibration to resolve unclearable errors and immobilized table conditions caused by hardware replacement or misalignment

Ranked causes

1. Table tilted beyond maximum 2.5 degrees (occasional)
2. Table upgraded without full elevation capability (occasional)
3. Mis-positioned Actuator sub-sections (occasional)
4. Mismatched internal Actuator Height Measurement Potentiometers (occasional)

First check

Remove Control Board Access Covers from both sides

Test point: Base Covers, left and right
Expected: Access covers removed, Control Board visible

10 more checks with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

CAN bus communication error caution

CAN bus data signal not present or malformed; LED Display does not update; audible alarms not produced

Ranked causes

1. JP1 jumper not installed on one or both PCBs (common)
2. CAN bus wiring damaged or disconnected (occasional)

First check

Verify JP1 jumper is installed on both Control Boards

Test point: JP1 location on AY40-043S left and right boards
Expected: Jumper installed and seated

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

Error code 0 - Normal sleep mode

All dark display indicates sleep mode or fully discharged batteries

Ranked causes

1. System in sleep mode with adequate charge (common)
2. Batteries fully discharged (occasional)

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

Tabletop motion controlled improperly or insufficient power caution

Tabletop moves slowly, stutters, or does not respond to commands; actuators lack force

Ranked causes

1. Inadequate 24 VDC supply voltage (common)
2. PWM signal or motor drive feedback circuit failure (occasional)

First check

Measure battery supply voltage at TP15

Test point: TP15
Expected: +24 VDC ±1.5V, ±1.5 V
Tools: DMM

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

Tabletop motion does not stop when obstruction detected patient safety

Obstruction sensors at tabletop corners fail to halt downward motion when interrupted

Ranked causes

1. Obstruction sensor switch failure or wiring break (common)
2. Control Board hardware signal circuit failure (occasional)

First check

Verify obstruction sensor physical condition and wiring continuity

Test point: Left rear corner and each right corner sensor
Expected: Switches intact, wiring connected

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

Torque limit fault triggered continuously caution

Fault 1 or Fault 2 asserted; motor torque limit exceeded warning; tabletop motion stops prematurely

Ranked causes

1. Mechanical obstruction or excessive load (common)
2. Torque limit threshold set too low or sensor drift (occasional)

First check

Inspect tabletop and actuators for mechanical obstruction

Test point: Tabletop and lift actuator assembly
Expected: No visible obstruction; smooth manual movement

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

Base Charging Power Supply installation high voltage

Base Charger must be wall-mounted with proper grounding, fuse verification, AC power application, and Battery Load Disconnect Switch activation

Ranked causes

1. Initial installation and setup required (common)

First check

Mount Base Charger to wall

Test point: Four rear panel mounting holes
Expected: Unit securely mounted no lower than 6" above floor

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

Base Charging Power Supply voltage verification high voltage

Output voltage at 4-pin DC Power connector must be confirmed to be +29 VDC after installation; adjustment via potentiometer may be necessary

Ranked causes

1. Voltage adjustment required during initial installation (common)

First check

Measure output voltage at 4-pin DC Power connector

Test point: 4-pin DC Power connector P100 (Pins 1 & 2)
Expected: +29 VDC
Tools: Digital multimeter

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

Calibration: Extended calibration procedure patient safety

Restore normal table operation after hardware errors by cycling table through full range of motion

Ranked causes

1. Hardware errors preventing normal table motion (unknown)

First check

Confirm Laser Sensor Element is receiving Laser Beam

Test point: Laser Sensor Element
Expected: Receiving laser beam or flooded with flashlight

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

Calibration: Float-Top Lock Release Lever adjustment caution

Float-Top Lock Release Lever position becomes awkward and requires realignment to restore ideal angle with respect to the table; lever can be adjusted through 180° range

Ranked causes

1. Lever position drift during installation or use (common)

First check

Verify Float-Top Lock Release Lever is in Locked position

Test point: Float-Top Lock Release Lever
Expected: Lever in Locked position

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

Calibration: Laser emitter and sensor alignment caution

Laser Emitter and Laser Receptor require realignment after replacement of Laser Module or Laser Receptor Board to ensure proper beam positioning and obstruction detection.

Ranked causes

1. Laser Module or Laser Receptor Board replaced (unknown)

First check

Remove tabletop and perform Extended Calibration Procedure

Test point: tabletop level
Expected: tabletop level

10 more checks with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

Calibration: Lift calibration procedure patient safety

Correct height synchronization errors between left and right actuator assemblies

Ranked causes

1. Error codes 16, 17, 20, or 21 (common)

First check

Hold Table-Down Footswitch until Lift Calibration begins

Test point: Table-Down Footswitch
Expected: Calibration begins approximately 10 seconds after lower limit reached

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

Control board fault

Table control board may be faulty after battery replacement or testing

Ranked causes

1. Defective control board AY40-032S (unknown)

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

Error code 1 - Emergency Stop engaged caution

Emergency Stop activated; red LED illuminated

Ranked causes

1. Emergency Stop switch manually engaged (common)

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

Error code 10 - 24 Volt failure left tower high voltage

+24 VDC supply on left Control PCB out of range

Ranked causes

1. +24 VDC supply voltage outside acceptable range; battery needs charging (common)

First check

Measure +24V supply voltage on left tower

Test point: TP15 (reference TP17 = Ground)
Expected: +24 VDC, 22.5 - 29.0 V
Tools: Digital multimeter

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

Error code 11 - 24 Volt failure right tower high voltage

+24 VDC supply on right Control PCB out of range

Ranked causes

1. +24 VDC supply voltage outside acceptable range; battery needs charging (common)

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

Error code 12 - 18 Volt failure left tower high voltage

+18 VDC supply on left Control PCB out of range

Ranked causes

1. +18 VDC supply voltage outside acceptable range (occasional)

First check

Measure +18V supply voltage on left tower

Test point: TP6 (reference TP17 = Ground)
Expected: +18 VDC, 16.0 - 18.8 V
Tools: Digital multimeter

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

Error code 13 - 18 Volt failure right tower high voltage

+18 VDC supply on right Control PCB out of range

Ranked causes

1. +18 VDC supply voltage outside acceptable range (occasional)

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

Error code 14 - Mismatched potentiometer left tower caution

Potentiometer mismatch detected in left tower control

Ranked causes

1. Software and hardware potentiometer positions out of sync (occasional)

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

Error code 15 - Mismatched potentiometer right tower caution

Potentiometer mismatch detected in right tower control

Ranked causes

1. Software and hardware potentiometer positions out of sync (occasional)

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

Error code 16 - Mismatched motors left tower patient safety

Two motors in left tower out of height synchronization by more than 0.5 inch

Ranked causes

1. Master and Slave motors in left tower not synchronized (rare)

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

Error code 16 displayed patient safety

Actuator height synchronization error on table lift system

Ranked causes

1. Height difference between right and left actuator assemblies (common)

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

Error code 17 - Mismatched motors right tower patient safety

Two motors in right tower out of height synchronization by more than 0.5 inch

Ranked causes

1. Master and Slave motors in right tower not synchronized (rare)

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

Error code 17 displayed patient safety

Actuator height synchronization error on table lift system

Ranked causes

1. Height difference between right and left actuator assemblies (common)

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

Error code 18 - Battery communication error left tower caution

Communication cable between battery module and left tower control PCB not functioning

Ranked causes

1. Communication cable J6 to J2 disconnected or damaged (occasional)

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

Error code 19 - Battery communication error right tower caution

Communication cable between battery module and right tower control PCB not functioning

Ranked causes

1. Communication cable J6 to J2 disconnected or damaged (occasional)

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

Error code 2 - Mechanical obstruction patient safety

Mechanical switches not held closed by tabletop; obstruction blocking motion

Ranked causes

1. Three spring-loaded mechanical switches not fully engaged (common)

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

Error code 20 - Tilt error left tower patient safety

Left and right towers out of height synchronization by more than 0.5 inch

Ranked causes

1. Left tower lower than right tower by more than 0.5 inch (rare)

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

Error code 20 displayed patient safety

Actuator height synchronization error on table lift system

Ranked causes

1. Height difference between right and left actuator assemblies (common)

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

Error code 21 - Tilt error right tower patient safety

Left and right towers out of height synchronization by more than 0.5 inch

Ranked causes

1. Right tower lower than left tower by more than 0.5 inch (rare)

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

Error code 21 displayed patient safety

Actuator height synchronization error on table lift system

Ranked causes

1. Height difference between right and left actuator assemblies (common)

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

Error code 3 - Laser obstruction patient safety

Laser beam interrupted during downward motion

Ranked causes

1. Object interrupting laser beam between lift actuators (common)

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

Error code 4 - Hardware error left tower caution

Watchdog timer inhibited further activity in left tower

Ranked causes

1. Watchdog timer timeout in left tower hardware (rare)

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

Error code 5 - Hardware error right tower caution

Watchdog timer inhibited further activity in right tower

Ranked causes

1. Watchdog timer timeout in right tower hardware (rare)

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

Error code 6 - Communications error left tower caution

Main communication cable between Master and Slave control PCBs at J5 not functioning

Ranked causes

1. Communication cable between Master and Slave AY40-043 not functioning (occasional)

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

Error code 7 - Communications error right tower caution

Main communication cable between Master and Slave control PCBs at J5 not functioning

Ranked causes

1. Communication cable between Master and Slave AY40-043 not functioning (occasional)

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

Error code 8 - 5 Volt failure left tower high voltage

+5 VDC supply on left Control PCB out of range

Ranked causes

1. +5 VDC supply voltage outside acceptable range (occasional)

First check

Measure +5V supply voltage on left tower

Test point: TP16 (reference TP17 = Ground)
Expected: +5.0 VDC, 4.7 - 5.3 V
Tools: Digital multimeter

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

Error code 9 - 5 Volt failure right tower high voltage

+5 VDC supply on right Control PCB out of range

Ranked causes

1. +5 VDC supply voltage outside acceptable range (occasional)

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

Table internal battery charging caution

Initial and periodic charging of table internal battery via external Base Charging Power Supply using retractable DC charging cord

Ranked causes

1. Battery requires initial or periodic recharging (common)

First check

Extend retractable DC Charging Cord

Test point: Retractable 30-foot DC Charging Cord
Expected: Cord extended sufficiently to reach Table Base DC Power Input

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

Table tilt or motion error in special calibration patient safety

Table exhibits unintended tilting or excess motion during special calibration mode; operator must stop procedure immediately

Ranked causes

1. Actuator malfunction (occasional)

First check

Monitor table motion during special calibration mode

Test point: Table vertical travel
Expected: Table travels smoothly to bottom then top without excess tilt; beep sounds when travel complete

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

Error codes

Code	Meaning	Trigger	Severity
`01110/01111/10000/10001/10100/10101`	Error codes requiring special calibration mode procedure	Activation of special calibration mode via test button sequence	error
`24 Volt Error`	24 VDC supply voltage is low, unstable, or missing on the fluoroscopy table control system	Voltage at TP15 falls below acceptable threshold (< 21 VDC) or charger disconnected during operation	error
`24 Volt Error`	Battery or charging system voltage out of specification	DC voltage at TP15 falls below acceptable minimum or fails to reach expected level	error
`LED Display Error Condition`	Battery charge indicator exhibits abnormal pattern or blinking yellow/orange segment indicating system error	Display shows pattern other than those documented in LED Display Indications table or any segment appears as blinking yellow/orange	error

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.