Imaging tables · 6800 family

Mizuho OSI 6800 Allegro: troubleshooting and error codes

The ServiceForge knowledge base holds 29 documented symptoms for the Mizuho OSI 6800 Allegro, with 33 ranked causes, 42 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

Battery Status LED illuminates red

Battery Status indicator light shows red instead of green, indicating batteries are not fully charged

Ranked causes

1. Batteries require charging (common)
2. Batteries may require replacement (occasional)

First check

Disconnect table Power Cord and turn on main power switch

Test point: Power Switch
Expected: Power switch ON with no external power

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

Equipment handling safety during preventative maintenance patient safety

Technician may be exposed to biohazards or electrostatic discharge when servicing the imaging table, particularly when working on internal components near PCBs.

Ranked causes

1. Biohazard contamination from equipment or hospital environment (unknown)
2. Electrostatic discharge damage to PCBs and sensitive devices (unknown)

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

Hand Pendant battery status not OK patient safety

Hand Pendant control Battery Status OK LED does not illuminate green, indicating low or missing battery power

Ranked causes

1. Hand Pendant battery low or depleted (common)
2. Hand Pendant battery circuit defective (rare)

First check

Visually inspect Hand Pendant Battery Status LED indicator

Test point: Hand Pendant control unit LED indicator
Expected: Green LED illuminated, labeled Battery Status OK

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

Power switch does not illuminate when turned on high voltage

Power switch ON position does not show illumination after connecting to AC power, indicating possible no AC power or internal wiring issue

Ranked causes

1. No AC power at table receptacle (occasional)
2. Power switch illumination circuit defective (rare)

First check

Test AC power source with multimeter

Test point: Wall outlet providing AC power
Expected: 120V AC (or appropriate voltage for region)
Tools: Digital Multi-meter with probe

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

Circuit breakers are tripped caution

One or more of the three circuit breakers on table-base panel are in tripped position

Ranked causes

1. Electrical overload or short circuit (occasional)

First check

Visually inspect circuit breaker positions on table-base panel

Test point: Three circuit breakers on table-base panel
Expected: All three breakers in ON position, no indicators showing trip

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

Hand Pendant control buttons do not illuminate

Hand Pendant inserted into alternate receptacle; control buttons not illuminating green when power switch turned on

Ranked causes

1. Hand Pendant not properly seated in alternate receptacle (common)

First check

Hand Pendant control buttons illuminate green

Test point: Hand Pendant alternate receptacle
Expected: Control buttons illuminate green

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

Hand Pendant control not responding

Hand Pendant control buttons do not illuminate or function when inserted into receptacle

Ranked causes

1. Hand Pendant not properly inserted into alternate receptacle (common)

First check

Insert Hand Pendant into alternate receptacle and observe button illumination

Test point: Hand Pendant control buttons
Expected: Control buttons illuminate green

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

Joystick activation button not functioning

Joystick does not respond to input; tabletop lateral movement does not occur when joystick is operated

Ranked causes

1. Activation button not pressed or not held (common)

First check

Activation button operation

Test point: Red activation button on joystick
Expected: Button can be pressed and held; tabletop responds to joystick movement

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

Joystick cable-connector not properly seated

Normal or High-speed indicator lights do not illuminate green when joystick is inserted into receptacle

Ranked causes

1. Joystick cable-connector not fully inserted (common)

First check

Observe indicator lights when joystick is inserted

Test point: Joystick receptacle indicator lights
Expected: Normal or High-speed indicator lights illuminate green

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

Joystick locking lever not properly positioned

Joystick does not move tabletop in intended direction or movement direction is reversed

Ranked causes

1. Joystick locking lever not locked toward pedestal-end (common)

First check

Verify locking lever position

Test point: Joystick locking lever
Expected: Completely locked toward pedestal-end for same-direction movement

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

Joystick speed select button not functioning

Speed Select button does not change speed mode or corresponding LED does not illuminate

Ranked causes

1. Speed Select button mechanism or LED failure (rare)

First check

Speed Select button and LED operation

Test point: Speed Select button and indicator LED on joystick
Expected: Button responds to press; corresponding LED illuminates when pressed

Joystick variable speed operation not functioning

Tabletop movement speed does not change with joystick handle position or speed control

Ranked causes

1. Variable speed control not engaged or calibration issue (occasional)

First check

Variable speed response during operation

Test point: Joystick handle and tabletop movement response
Expected: Tabletop speed varies smoothly as joystick handle position changes

Labels not intact or illegible patient safety

Warning labels or other identification labels are missing, damaged, torn, or not legible

Ranked causes

1. Label damage or detachment (occasional)

First check

Verify Warning – Not for Storage label is attached and legible

Test point: Base cover label attachment point
Expected: Label firmly attached and text clearly readable

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

Power cord missing Hospital Grade tag patient safety

Power cord does not have OSI tag indicating Hospital Grade certification

Ranked causes

1. Tag missing or removed (rare)

First check

Verify OSI Hospital Grade tag present on power cord

Test point: Power cord connector area
Expected: OSI Hospital Grade tag visibly attached

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

Power cord receptacle not secure or inoperative high voltage

Base receptacle where power cord connects is loose, corroded, or not functioning properly

Ranked causes

1. Receptacle loose or internal contacts corroded (occasional)

First check

Verify power cord receptacle is properly secured to table base

Test point: power cord receptacle and mounting points
Expected: Receptacle fully seated and all mounting hardware tight

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

Power cord receptacle not secure or not operational high voltage

Power cord base receptacle is not properly secured or does not function correctly

Ranked causes

1. Loose or damaged receptacle connection (occasional)

First check

Inspect power cord base receptacle security and function

Test point: Power cord connector and receptacle on table base
Expected: Receptacle firmly secured and accepts power cord without loose connection

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

Power cord receptacle not secured or inoperable high voltage

Power cord base receptacle fails security check or does not function properly

Ranked causes

1. Power cord receptacle loose or defective (unknown)

First check

Verify power cord receptacle is properly secured to table base

Test point: Power cord receptacle mounting
Expected: Receptacle firmly attached, no movement or looseness

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

Power cord wear or damage high voltage

Power cord exhibits visible wear, corrosion, or insulation cracks compromising electrical safety

Ranked causes

1. Power cord exposed to mechanical stress or environmental corrosion (occasional)

First check

Inspect power cord for wear, corrosion, or insulation cracks

Test point: entire length of power cord
Expected: Power cord free of damage, wear, corrosion, or insulation cracks

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

Power cord wear, corrosion, or insulation damage high voltage

Power cord shows signs of wear, corrosion, or cracks in insulation

Ranked causes

1. Age or environmental exposure causing cable degradation (occasional)

First check

Inspect power cord for wear, corrosion, or insulation damage

Test point: Entire length of power cord and connectors
Expected: No visible wear, corrosion, or cracks; intact insulation

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

Power cord worn or damaged high voltage

Power cord shows signs of wear, corrosion, or insulation cracks during inspection

Ranked causes

1. Power cord physical damage or degradation (unknown)

First check

Visually inspect power cord for wear, corrosion, and insulation cracks

Test point: Full length of power cord
Expected: Free of wear, corrosion, and insulation cracks

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

Power switch damaged or cover torn caution

ON/OFF Power Switch/Circuit Breaker is not properly secured or plastic cover is torn or pierced

Ranked causes

1. Physical damage to switch housing or cover (rare)

First check

Inspect power switch and circuit breaker for damage and secure mounting

Test point: ON/OFF Power Switch/Circuit Breaker on table-base panel
Expected: Switch properly secured, plastic cover intact with no tears or pierced areas

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

Power switch does not illuminate

When Power Switch ON is activated on table-base panel, no illumination occurs; table may still operate on internal battery power

Ranked causes

1. Power cord not connected to live AC source (common)

First check

Power Cord connected to live AC source and table receptacle

Test point: Power receptacle on table base
Expected: Power cord firmly seated

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

Power switch illumination not working

Power switch ON indicator light does not illuminate when AC power cord connected and switch activated

Ranked causes

1. Table operating on internal battery power instead of AC mains (common)

First check

Verify power cord is connected to AC power source and table receptacle

Test point: table power receptacle and AC outlet
Expected: Power cord properly seated and connected

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

Power switch or circuit breaker cover damaged caution

Plastic cover on power switch or circuit breaker panel is torn, pierced, or missing

Ranked causes

1. Physical impact or wear damage to protective cover (occasional)

First check

Inspect power switch and circuit breaker covers for damage

Test point: plastic cover on table-base panel
Expected: Cover intact with no tears, piercing, or missing sections

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

Power switch or circuit breaker damaged or not secured caution

ON/OFF Power Switch/Circuit Breaker is loose, torn, or pierced plastic cover is compromised

Ranked causes

1. Power switch/circuit breaker mounting loose or cover damaged (unknown)

First check

Verify power switch/circuit breaker is properly secured to table base

Test point: Switch/breaker mounting fasteners
Expected: All fasteners tight, no movement or looseness

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

Table base contaminated or unclean patient safety

Table base shows signs of contamination or lack of proper care and maintenance

Ranked causes

1. Inadequate cleaning and maintenance (unknown)

First check

Inspect table base for cleanliness and contamination

Test point: Entire table base surface
Expected: Clean surface without hazardous contamination

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

Table base contamination or labeling deficient patient safety

Table base surface shows hazardous contamination or warning labels are not intact and legible

Ranked causes

1. Improper cleaning or label deterioration over time (occasional)

First check

Inspect table base for cleanliness and hazardous contamination

Test point: entire table base surface
Expected: Base clean and free of hazardous contamination consistent with proper care

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

Table pad cracked or abnormal caution

Table pad shows cracks or other visual abnormality during inspection

Ranked causes

1. Normal wear or impact damage to table pad (occasional)

First check

Table pad for cracks or abnormalities

Test point: Table pad surface
Expected: No cracks or abnormalities visible

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

Telescopic shrouds or sheet-metal covers damaged caution

Stainless steel sheet-metal covers show visible damage when table raised to maximum height

Ranked causes

1. Mechanical damage to shrouds or covers (rare)

First check

Stainless steel sheet-metal covers for damage

Test point: All telescopic shrouds and sheet-metal covers
Expected: No visible cracks or damage

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

Community

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

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