FR FieldReady Academy
Surgical tables · 5803 family

Mizuho OSI 5803: troubleshooting and error codes

The ServiceForge knowledge base holds 138 documented symptoms for the Mizuho OSI 5803, with 299 ranked causes, 267 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

Rotation Safety Lock brake does not release patient safety

Rotation Safety Lock switch off but brake does not release when commanded

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power to PC board is not connected (common)
  3. 3. Power supply is not operating (occasional)
  4. 4. Cable from PC board to column is not connected (occasional)
  5. 5. Cable to column is faulty (occasional)
  6. 6. Brake off switch is faulty (occasional)
  7. 7. Wire connection to switch is faulty (occasional)
  8. 8. Traction arc switch closed (rare)
  9. 9. Traction arc switch wiring shorted (rare)
  10. 10. Limit switch faulty (rare)
  11. 11. Limit switch operating mechanical error (rare)

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

Tilt does not function with Rotation Safety Lock switch off patient safety

Hand controller 'Tilt left or right' command given but tilt motor does not drive with Rotation Safety Lock switch in OFF position

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power supply is not operating correctly (occasional)
  3. 3. Power to PC board is not connected (occasional)
  4. 4. Hand controller is non-operative or not plugged in (occasional)
  5. 5. PC board is non-operative (occasional)
  6. 6. Cabling is not connected or is faulty (occasional)
  7. 7. Tilt motor is faulty (rare)
  8. 8. Brake on sensor is closed (occasional)
  9. 9. Brake on sense wire is shorted (occasional)
  10. 10. Either limit switch is faulty or open (occasional)
  11. 11. Limit switch wiring is disconnected (occasional)
First check

Verify table power is on

Test point
Main power switch
Expected
Power switch in ON position

9 more checks with pass and fail actions, 11 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Tilt motor does not drive with Rotation Safety Lock off patient safety

Tilt left or right command issued with Rotation Safety Lock switch off but tilt motor does not drive

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power supply is not operating correctly (occasional)
  3. 3. Power to PC board is not connected (common)
  4. 4. Hand controller is non-operative or not plugged in (occasional)
  5. 5. PC board is non-operative (occasional)
  6. 6. Cabling is not connected or is faulty (occasional)
  7. 7. Tilt motor is faulty (occasional)
  8. 8. Brake on sensor is closed (rare)
  9. 9. Brake on sense wire is shorted (rare)
  10. 10. Either limit switch is faulty or open (rare)
  11. 11. Limit switch wiring is disconnected (rare)

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

Rotation Safety Lock does not release brake patient safety

Rotation Safety Lock switch turned off but brake does not release

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power to PC board is not connected (occasional)
  3. 3. Power supply is not operating (occasional)
  4. 4. Cable from PC board to column is not connected or faulty (occasional)
  5. 5. Brake off switch is faulty (occasional)
  6. 6. Wire connection to switch is faulty (occasional)
  7. 7. Traction arc switch closed (occasional)
  8. 8. Traction arc switch wiring shorted (occasional)
  9. 9. Limit switch faulty (rare)
  10. 10. Limit switch mechanical error (rare)
First check

Verify table power is on

Test point
Main power switch
Expected
Power switch in ON position

9 more checks with pass and fail actions, 10 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Brake does not release with Rotation Safety Lock switch off patient safety

Brake fails to release when Rotation Safety Lock switch is off and tilt is commanded

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power to PC board is not connected (common)
  3. 3. Power supply is not operating (common)
  4. 4. Cable from PC board to column is not connected (occasional)
  5. 5. Cable to column is faulty (occasional)
  6. 6. Brake off switch is faulty (occasional)
  7. 7. Wire connection to switch is faulty (occasional)
  8. 8. Traction arc switch closed or wiring shorted (rare)
  9. 9. Limit switch faulty or limit switch operating mechanical error (rare)

Tilt motor does not drive with Rotation Safety Lock switch off patient safety

When Rotation Safety Lock switch is off, tilt motor does not operate when commanded

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power supply is not operating correctly (common)
  3. 3. Power to PC board is not connected (common)
  4. 4. Hand controller is non-operative or not plugged in (occasional)
  5. 5. PC board is non-operative (occasional)
  6. 6. Cabling is not connected or is faulty (occasional)
  7. 7. Tilt motor is faulty (rare)
  8. 8. Brake on sensor is closed or sense wire is shorted (rare)
  9. 9. Either limit switch is faulty or open, or wiring is disconnected (rare)

Brake does not release

Brake does not release when Rotation Safety Lock switch is off or during tilt operation

Ranked causes

  1. 1. Table power is off or power to PC board not connected (common)
  2. 2. Power supply not operating (occasional)
  3. 3. Cable from PC board to column not connected or faulty (occasional)
  4. 4. Brake off switch faulty or wiring disconnected (occasional)
  5. 5. Traction arc switch closed or wiring shorted (rare)
  6. 6. Limit switch faulty or operating error (rare)

Pre-operational function check failed patient safety

One or more table movements, locks, or crossbar functions do not operate as expected during startup verification

Ranked causes

  1. 1. Table up function inoperative (unknown)
  2. 2. Table down function inoperative (unknown)
  3. 3. Trendelenburg or reverse Trendelenburg malfunction (unknown)
  4. 4. Tilt left or right malfunction (unknown)
  5. 5. Rotation lock engagement failed (unknown)
  6. 6. Crossbar rotation lock inoperative (unknown)
First check

Verify power and hand control connection

Test point
Main ON/OFF switch and hand control connector under head-end
Expected
Switch illuminates; hand control is plugged in

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

Tilt function not responding high voltage

Tilt motor does not operate when tilt command is given with Rotation Safety Lock switch off

Ranked causes

  1. 1. Table power is off or power supply not operating (common)
  2. 2. Power to PC board not connected (occasional)
  3. 3. Hand controller non-operative or not plugged in (occasional)
  4. 4. PC board non-operative or cabling faulty (occasional)
  5. 5. Tilt motor or limit switch faulty (occasional)
  6. 6. Brake sensor or wiring shorted (rare)

Reverse Trendelenburg function does not work patient safety

Hand controller 'Reverse Trendelenburg' command given but foot column does not lower and head column does not raise

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power to PC board is not connected (occasional)
  3. 3. Hand controller is non-operative or not plugged in (occasional)
  4. 4. Cable from PC board to column is not connected or faulty (occasional)
  5. 5. Column or PC board is faulty (rare)
First check

Verify table power is on

Test point
Main power switch
Expected
Power switch in ON position

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

Table does not move down patient safety

Hand controller command 'Table Down' given but both columns do not lower

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power to PC board is not connected (occasional)
  3. 3. Hand controller is non-operative or not plugged in (occasional)
  4. 4. Cable from PC board to column is not connected or faulty (occasional)
  5. 5. Column or PC board is faulty (rare)
First check

Verify table power is on

Test point
Main power switch
Expected
Power switch in ON position

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

Table does not move up patient safety

Hand controller command 'Table Up' given but both columns do not rise

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power to PC board is not connected (occasional)
  3. 3. Hand controller is non-operative or not plugged in (occasional)
  4. 4. Cable from PC board to column is not connected or faulty (occasional)
  5. 5. Column or PC board is faulty (rare)
First check

Verify table power is on

Test point
Main power switch
Expected
Power switch in ON position

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

Table power off or controller non-responsive high voltage

Table does not respond to hand controller commands or power is not reaching the system

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power to PC board not connected (occasional)
  3. 3. Hand controller non-operative or not plugged in (occasional)
  4. 4. Cable from PC board to column not connected or faulty (occasional)
  5. 5. Column or PC board faulty (rare)
First check

Verify table power is on

Test point
ON/OFF Power-switch and Power On light
Expected
Green Power On light illuminated

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

Table Up command does not move columns patient safety

Hand controller Table Up command issued but both columns do not rise

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power to PC board is not connected (common)
  3. 3. Hand controller is non-operative or not plugged in (occasional)
  4. 4. Cable from PC board to column is not connected or faulty (occasional)
  5. 5. Column or PC board is faulty (rare)

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

Tilt home LED does not light after tilt command caution

Tilt motor operates but tilt home LED does not illuminate when tilt reaches home position

Ranked causes

  1. 1. Home sensor faulty or misadjusted (common)
  2. 2. 1/r sensor faulty or wiring issue (occasional)
  3. 3. Traction arc switch wiring shorted (rare)
  4. 4. Lock sensor faulty or wiring disconnected (occasional)
  5. 5. LED faulty or wiring disconnected (occasional)
First check

Verify home sensor alignment and wiring

Test point
Home sensor connector and position
Expected
Sensor properly aligned and wiring not shorted

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

Tilt motor does not reach home position patient safety

Tilt motor runs but fails to stop at home position; tilt home LED does not light

Ranked causes

  1. 1. Home sensor faulty or misadjusted (occasional)
  2. 2. 1/r sensor faulty or misadjusted (occasional)
  3. 3. Lock sensor faulty or wiring disconnected (occasional)
  4. 4. Traction arc switch wiring shorted or traction arc switch closed (rare)
  5. 5. PC board or tilt motor non-operational or power not supplied (occasional)
First check

Verify power is applied to PC board

Test point
PC board power input
Expected
Voltage present per specification

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

Trendelenburg function does not work patient safety

Hand controller 'Trendelenburg' command given but head column does not lower and foot column does not raise

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power to PC board is not connected (occasional)
  3. 3. Hand controller is non-operative or not plugged in (occasional)
  4. 4. Cable from PC board to column is not connected or faulty (occasional)
  5. 5. Column or PC board is faulty (rare)
First check

Verify table power is on

Test point
Main power switch
Expected
Power switch in ON position

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

Brake does not engage or LED does not respond correctly patient safety

Brake motor does not engage or LED does not illuminate for 15-25 seconds after brake command

Ranked causes

  1. 1. PC board faulty or motor faulty (occasional)
  2. 2. Brake motor wiring disconnected (common)
  3. 3. LED wiring disconnected or LED faulty (occasional)
  4. 4. No battery power to PC board (occasional)
First check

Verify brake motor wiring connection

Test point
Motor cable connector at PC board
Expected
Cable connected and secure

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

Brake motor does not engage patient safety

Brake does not engage when power is removed or commanded; LED does not illuminate after 15-25 seconds

Ranked causes

  1. 1. PC board faulty (occasional)
  2. 2. Brake motor faulty or wiring to motor disconnected (occasional)
  3. 3. LED faulty or wiring disconnected (occasional)
  4. 4. No battery power available (rare)
First check

Verify brake motor is energized during power-down sequence

Test point
Brake motor connector
Expected
Voltage present for 15-25 seconds
Tools
DMM

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

Reverse Trendelenburg command does not position table patient safety

Reverse Trendelenburg command issued but foot column does not lower and head column does not rise

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power to PC board is not connected (common)
  3. 3. Hand controller is non-operative or not plugged in (occasional)
  4. 4. Cable from PC board to column is not connected or faulty (occasional)

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

Table Down command does not move columns patient safety

Hand controller Table Down command issued but both columns do not lower

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power to PC board is not connected (common)
  3. 3. Hand controller is non-operative or not plugged in (occasional)
  4. 4. Cable from PC board to column is not connected or faulty (occasional)

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

Tilt left or right disabled patient safety

Tilt motor does not respond to left or right tilt command; tilt function inoperative

Ranked causes

  1. 1. Traction arc switch closed or faulty (common)
  2. 2. Rotation Safety Lock switch on (common)
  3. 4. PC board faulty or power issue (occasional)
  4. 5. Tilt motor not connected or faulty (occasional)
First check

Verify traction arc switch is open and properly adjusted

Test point
Traction arc switch
Expected
Switch open

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

Trendelenburg command does not position table patient safety

Trendelenburg command issued but head column does not lower and foot column does not rise

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power to PC board is not connected (common)
  3. 3. Hand controller is non-operative or not plugged in (occasional)
  4. 4. Cable from PC board to column is not connected or faulty (occasional)

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

Battery status light red or fault light on caution

Status indicator shows red instead of green, or fault light illuminates during battery operation

Ranked causes

  1. 1. Batteries need charging (common)
  2. 2. Batteries improperly connected or polarity reversed (common)
  3. 3. Batteries completely discharged (occasional)
First check

Observe Battery Status Light color

Test point
Base Panel Battery Status Light
Expected
Green light indicates batteries charged; red indicates need charging

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

Center beam does not retract or extend smoothly caution

Center beam binds, makes abnormal noise, or does not move to full travel stops when locking knob is loosened

Ranked causes

  1. 1. Center beam track dirty or damaged (common)
  2. 2. Center beam internal stops engaged or damaged (occasional)
  3. 3. Center beam actuator or drive mechanism failure (rare)
First check

Loosen center beam locking knob

Test point
Locking knob
Expected
Knob turns freely

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

No column function at either end high voltage

Column does not respond to hand control at head or foot end

Ranked causes

  1. 1. No power to table (common)
  2. 2. Hand Control Module not connected or defective (common)
  3. 3. Electrical connector at column base disconnected (common)
First check

Verify power cord is plugged in and live outlet is active

Test point
Power cord, electrical outlet
Expected
Power cord plugged in, outlet provides power

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

No column function either end high voltage

Columns do not respond to hand controller commands from either the head or foot end

Ranked causes

  1. 1. Power not connected or circuit breaker tripped (common)
  2. 2. Hand Control Module not connected or faulty (occasional)
  3. 3. Electrical connector at column base disconnected (occasional)
First check

Verify power input

Test point
Power cord and AC outlet
Expected
Power cord plugged into live electrical outlet

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

Table Top cannot be attached to 5803 Base patient safety

Inability to couple Table Top due to Crossbars not level or H-Frame installation issues

Ranked causes

  1. 1. Head-end and Foot-end Crossbars not horizontal in all planes (common)
  2. 2. H-Frame not aligned with mounting studs (occasional)
  3. 3. T-Pin not inserted completely through H-Frame and mounting tube (occasional)
First check

Inspect Head-end and Foot-end Crossbars for level orientation

Test point
Crossbars
Expected
Horizontal in all planes

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

Tilt motor does not stop when Release Tilt button pressed patient safety

Release Tilt button pressed but tilt motor does not cease and brake does not engage

Ranked causes

  1. 1. Hand controller faulty (occasional)
  2. 2. PC board faulty (occasional)
  3. 3. Same as for tilt w/rocker on (unknown)

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

Trendelenburg command does not move columns correctly patient safety

Head column fails to move down and foot column fails to move up when Trendelenburg is commanded

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power to PC board is not connected (common)
  3. 3. Hand controller is non-operative or not plugged in (occasional)

Battery leaks or causes damage caution

Improperly installed batteries can leak, causing equipment damage or injury to personnel

Ranked causes

  1. 1. Batteries installed incorrectly or connectors bridged (common)
  2. 2. Batteries fully discharged or failed to hold charge (occasional)
First check

Verify battery polarity and connections

Test point
Battery terminals A and B
Expected
Red wire to positive terminal battery A; jumper from A to B; black wire to negative terminal B

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

Button release does not stop other functions patient safety

Hand controller button released but other functions (excluding Tilt when rocker switch is on) do not cease immediately

Ranked causes

  1. 1. Hand controller is faulty (occasional)
  2. 2. PC board is faulty (occasional)
First check

Verify hand controller button release detection

Test point
Hand controller release button signal
Expected
Button release signal sent to PC board immediately

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

Caster brakes do not lock patient safety

Braking casters will not engage or do not remain locked when actuated

Ranked causes

  1. 1. Brake mechanism dirty or stuck (common)
  2. 2. Brake friction pad worn (occasional)
First check

Actuate each brake caster lock

Test point
Brake lever on each locking caster
Expected
Caster locks firmly and does not move when pushed

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

Casters do not rotate or roll freely caution

Casters restricted, stiff, or do not roll smoothly through full 360 degrees

Ranked causes

  1. 1. Caster bearings dirty or seized (common)
  2. 2. Caster wheels damaged or worn (occasional)
First check

Rotate and roll each caster through full 360 degrees

Test point
All casters
Expected
Smooth, free rotation without binding

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

Casters shake or have abnormal vibration caution

Casters vibrate abnormally or shake during movement

Ranked causes

  1. 1. Caster wheel unbalanced or damaged (common)
  2. 2. Caster bearing loose or worn (occasional)
First check

Roll table and observe for vibration or shaking

Test point
All casters during movement
Expected
Smooth rolling without shake or vibration

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

Center beam locking knob does not secure patient safety

Locking knob does not prevent center beam from retracting or extending

Ranked causes

  1. 1. Knob threads worn or stripped (occasional)
  2. 2. Beam locking pin or engagement mechanism worn (occasional)
First check

Tighten locking knob fully by hand

Test point
Locking knob on center beam
Expected
Knob turns smoothly and tightens firmly

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

DC battery power not functioning when AC power is disconnected

When AC power cord is unplugged from wall outlet and table is turned on, DC power does not function or Green Power On LED is not illuminated

Ranked causes

  1. 1. Battery system depleted or faulty (unknown)
  2. 2. Green Power On LED not illuminated despite DC power available (unknown)
First check

Verify all table features function on DC battery power

Test point
Table movement controls
Expected
Full range of motion without AC power

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

Function does not cease when button is released patient safety

Any function (except Tilt when rocker switch is on) fails to cease immediately when button is released

Ranked causes

  1. 1. Hand controller is faulty (occasional)
  2. 2. PC board is faulty (occasional)

Function does not stop when button released patient safety

Button released for any function except Tilt with rocker switch on but function does not cease immediately

Ranked causes

  1. 1. Hand controller faulty (occasional)
  2. 2. PC board faulty (occasional)

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

Hand control buttons illegible or damaged

Hand control buttons lack visible markings or control cord shows visible damage

Ranked causes

  1. 1. Button labels worn off or faded (common)
  2. 2. Control cord damaged or insulation compromised (occasional)
First check

Inspect hand control buttons for legibility

Test point
All buttons on hand control
Expected
All button labels clearly visible and readable

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

Handle loose or tilt home LED does not light caution

Handle is loose and tilt motor operation is inhibited; tilt home LED fails to illuminate when tilt reaches home position

Ranked causes

  1. 1. Handle mounting hardware loose (common)
  2. 2. Tilt home LED faulty or wiring disconnected (occasional)
First check

Inspect handle mounting hardware

Test point
Handle mounting screws and bolts
Expected
All fasteners tight and secure

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

Head End Assembly does not slide uniformly caution

Head End Assembly binding, stiff, or requiring excessive force to move in-line to stops in both directions

Ranked causes

  1. 1. Head End Assembly track or rail dirty or damaged (common)
  2. 2. Head End Assembly bearing or roller damaged (occasional)
First check

Apply force gauge and measure resistance moving Head End Assembly head direction

Test point
Head End Assembly connection point
Expected
15 to 25 pounds of force required, 15 to 25
Tools
Force gauge

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

No column function at Foot End only high voltage

Foot end column does not respond to hand control, head end works

Ranked causes

  1. 1. Hand Control Module not connected or defective (common)
  2. 2. Foot End Column connector disconnected (common)
First check

Verify hand control module is connected

Test point
Hand control connector
Expected
Hand control module plugged in

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

No column function at Head End only high voltage

Head end column does not respond to hand control, foot end works

Ranked causes

  1. 1. Hand Control Module not connected (common)
  2. 2. Head End Column connector disconnected (common)
First check

Verify hand control module is connected

Test point
Hand control connector
Expected
Hand control module plugged in

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

No column function Foot End only high voltage

Foot End column does not respond to hand controller commands

Ranked causes

  1. 1. Hand Control Module not connected or faulty (occasional)
  2. 2. Electrical connector at Foot End Column base disconnected (occasional)
First check

Verify Hand Control connection

Test point
Hand Control cord connector at base receptacle
Expected
Connector fully seated

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

No column function Head End only high voltage

Head End column does not respond to hand controller commands

Ranked causes

  1. 1. Hand Control Module faulty or disconnected (occasional)
  2. 2. Electrical connector at Head End Column base disconnected (occasional)
First check

Verify Hand Control connection

Test point
Hand Control cord connector at base receptacle
Expected
Connector fully seated

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

Retractable base center beam binds or makes abnormal noise caution

Center beam does not extend or retract smoothly; exhibits binding, grinding, or squeaking sounds during operation.

Ranked causes

  1. 1. Debris, corrosion, or misalignment in retraction mechanism (common)
  2. 2. Internal stop damaged or worn (occasional)
First check

Center beam retracts smoothly

Test point
Center beam
Expected
Full smooth retraction without binding or noise when locking knob is loosened

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

Reverse Trendelenburg command does not move columns correctly patient safety

Foot column fails to move down and head column fails to move up when Reverse Trendelenburg is commanded

Ranked causes

  1. 1. Table power is off (common)
  2. 2. Power to PC board is not connected (common)

Rotation friction control will not stop

Rotation friction control continues to rotate without stopping at head or foot end

Ranked causes

  1. 1. Brake band adjustment insufficient (common)
  2. 2. Brake band worn or damaged (occasional)
First check

Tighten friction control lever to maximum

Test point
Rotation friction control lever
Expected
Lever at maximum position and rotation stops

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

Rotation Safety Lock brake does not engage patient safety

Rotation Safety Lock switch on but brake does not engage when commanded

Ranked causes

  1. 1. Rocker switch not off or brake on sensor faulty (occasional)
  2. 2. Brake force adjustment is incorrect (occasional)

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

Rotation safety lock does not engage fully or sensor does not indicate lock status patient safety

Crossbar is not adequately secure when locked, or sensor does not show lock is engaged when crossbar is secure

Ranked causes

  1. 1. Rotation safety lock adjustment setscrew out of position from wear (occasional)
  2. 2. Brake clamp or sensor misalignment (occasional)
First check

Test rotation safety lock engagement with sensor indication

Test point
Rotation safety lock switch and sensor indicator
Expected
Sensor indicates lock is on when crossbar is secure; lock off sensor is closed when not engaged

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

Steer caster does not lock patient safety

Steer caster will not remain locked when engaged

Ranked causes

  1. 1. Steer lock mechanism stuck or worn (common)
  2. 2. Steer lock spring or detent damaged (occasional)
First check

Engage steer caster lock

Test point
Steer lock lever
Expected
Lock engages and caster does not swivel

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

Tilt and brake do not respond when Rotation Safety Lock switch is on patient safety

Hand controller 'Tilt' command given and brake does not engage or tilt motor does not drive with Rotation Safety Lock switch in ON position

Ranked causes

  1. 1. Brake motor faulty (occasional)
  2. 2. Brake wiring not connected (occasional)
First check

Verify brake motor is functioning

Test point
Brake motor
Expected
Brake motor energized and engaging when lock switch is on

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

Tilt does not stop when button is released patient safety

Hand controller 'Release Tilt' button pressed but tilt motor does not cease and brake does not engage

Ranked causes

  1. 1. Hand controller is faulty (occasional)
  2. 2. PC board is faulty (occasional)
First check

Verify hand controller button response

Test point
Hand controller Release Tilt button
Expected
Button press registered and signal sent to PC board

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

Tilt mechanism does not drive when rotation lock released patient safety

Tilt mechanism does not respond when 180° Rotation Lock handle is loosened, indicating possible electronic fault in base

Ranked causes

  1. 1. Wiring fault to head end (common)
  2. 2. Controller PC Board failure (occasional)
First check

Verify wiring continuity from base to head end

Test point
Wiring connections at base and head end
Expected
All connections intact and seated properly

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

Tilt motor does not cease when Release Tilt button is pressed patient safety

Tilt motor continues to operate after Release Tilt button is pressed; brake does not engage

Ranked causes

  1. 1. Hand controller is faulty (occasional)
  2. 2. PC board is faulty (occasional)

Tilt motor does not drive with Rotation Safety Lock on patient safety

Tilt left or right command issued with Rotation Safety Lock switch on but tilt motor does not drive

Ranked causes

  1. 1. Brake motor faulty or wiring not connected (occasional)
  2. 2. Same as tilt with rocker switch off (unknown)

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

180-degree rotation lock does not engage patient safety

Blue handle rotation lock at head end does not prevent rotational movement or indicator light does not illuminate when tightened clockwise

Ranked causes

  1. 1. 180-degree rotation lock mechanism failure or blue handle loose (unknown)
First check

Tighten 180-degree rotation lock blue handle clockwise

Test point
Blue handle at head end
Expected
Indicator light comes ON and rotational crossbar does not rotate

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

180-degree rotation lock does not release patient safety

Blue handle rotation lock at head end does not allow crossbar to rotate freely or indicator light does not turn off when unlocked

Ranked causes

  1. 1. Rotation lock mechanism stuck or blue handle stuck in locked position (unknown)
First check

Verify crossbar rotates freely after unlocking blue handle

Test point
Head end rotational crossbar
Expected
Rotates 360 degrees freely and indicator light is OFF

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

180° rotation lock does not engage patient safety

Blue handle at head end does not lock; indicator light does not come ON when tightened clockwise; rotational crossbar continues to rotate

Ranked causes

  1. 1. 180° rotation lock mechanism failure or blue handle misalignment (unknown)
First check

Tighten 180° rotation lock (blue handle) clockwise

Test point
Head end blue handle and indicator light
Expected
Indicator light comes ON and rotational crossbar does not rotate

More symptoms

  • 180deg rotation lock does not engage properly
  • 180deg Rotation Lock does not hold against applied torque
  • 180deg Rotation Lock does not release when unlocked
  • 180deg rotation lock does not unlock properly
  • 180deg rotation lock excessive crossbar movement under torque
  • 180deg Rotation Lock indicator does not illuminate when tightened
  • All pre-operational checks completed successfully
  • Arc Interlock Switch does not disable tilt function
  • Arc Interlock Switch not disabling tilt function
  • Base cannot be retracted for storage
  • Battery needs recharge
  • Battery Status light does not illuminate green
  • Battery terminal corrosion or contamination
  • Brake does not engage with Rotation Safety Lock switch on
  • Calibration: Head-end slider adjustment
  • Calibration: Head-End Slider friction adjustment
  • Calibration: Rotation Safety Lock
  • Caster will not lock/unlock
  • Caster won't lock or unlock
  • Center beam binds or makes abnormal noise during retraction/extension
  • Center beam overrides internal stops
  • DC battery power not functioning properly when AC disconnected
  • DC power not functioning on battery
  • DC power not functioning when AC power disconnected
  • DC power system not functioning
  • Electrical Fault indicated
  • Foot brake does not remain locked when rotational safety lock is toggled
  • Foot brake does not remain locked with rotational safety lock
  • Foot brake not remaining locked during rotational safety lock test
  • Foot end rotational crossbar does not lock
  • Foot end rotational crossbar does not rotate freely when unlocked
  • Foot end rotational crossbar excessive movement under torque
  • Foot end rotational crossbar excessively loose
  • Foot end rotational crossbar movement exceeds specification
  • Hand Control connector loose or disconnected
  • Hand control storage bracket not properly attached
  • Head end rotational crossbar does not rotate freely when unlocked
  • Head end rotational crossbar excessively loose
  • Head end rotational crossbar movement exceeds specification
  • Head-end and Foot-end Crossbars unsynchronized
  • Head-end slider moves with excessive force or insufficient friction
  • Height adjustment columns bind or move with noise
  • Height adjustment does not operate smoothly
  • Height columns bind or make noise during up/down movement
  • Lateral roll columns do not reach 25 degree limits or move with noise
  • Lateral roll does not operate to limits
  • Lateral roll does not reach 25° limit or binds
  • Left lateral roll does not operate within limits
  • Locking knob does not secure center beam
  • Operational inspection preparations incomplete
  • Retractable base center beam does not lock
  • Right lateral roll does not operate within limits
  • Rotation friction control won't stop rotation
  • Rotation Safety Lock at foot end does not illuminate when activated
  • Rotation Safety Lock at foot end does not release when deactivated
  • Rotation Safety Lock does not hold against applied torque at foot end
  • Rotation Safety Lock switch does not engage
  • Rotation Safety Lock switch does not operate properly
  • Rotation Safety Lock switch does not release
  • Table Fault light is illuminated
  • Table Power light does not illuminate
  • Table Top drops during operation
  • Table Top rotates unintentionally without power
  • Tilt Drive and Head-end Crossbar unsynchronized
  • Tilt Drive Status Indicator does not come ON when table returns to level
  • Tilt Drive Status Indicator does not function
  • Tilt Drive Status Indicator does not illuminate
  • Tilt Drive Status Indicator does not operate correctly
  • Tilt mechanism does not drive when rotation lock loosened
  • Tilt mechanism does not stop at center or rocks back and forth
  • Tilt mechanism does not stop at center or rocks past level
  • Tilt mechanism stops before reaching center level
  • Tilt motor does not drive with Rotation Safety Lock switch on
  • Trendelenburg adjustment does not operate smoothly
  • Trendelenburg or reverse Trendelenburg does not operate smoothly
  • Trendelenburg tilt columns move with binding or noise
  • Trendelenburg/reverse Trendelenburg columns bind or make noise
  • Unit does not power on from battery

78 more symptoms with ranked causes and checks 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.