OEC 9800C-Arm User manual

OEC®9800C-Arm
Service Manual
Contents Installation Service Schematics Periodic Maintenance Illustrated Parts
• Front Matter
• Introduction/Safety
• C-Arm Subsystem
• AC Power Distribution
• DC Power Distribution
• Battery Charging
• System Communications
• Interlocks
• Stator Power and Control
• Pre-Charging
• X-Ray On, X-Ray Disable
• kV Generation
• mA Generation
• Automatic Brightness Stabilization
• Collimator
• Image Control
• Cooling
• Flip Flop Motion
• Orbital Motion
• Wig Wag Motion
• Horizontal Cross Arm Motion
• L-Arm Motion
• Vertical Column Motion
• Steering and Braking
• Diagnostics
• Calibration
• Replacement

C-Arm Subsystem
C-Arm Subsystem
Circuit/Mechanical Descriptions.....................................................................................................................................................2
Subsystem Description..................................................................................................................................................................2
Major Assembly and Control Locations.........................................................................................................................................8
Subystem Functional Breakdown................................................................................................................................................14
Functional Tests.............................................................................................................................................................................14
Boot Test .....................................................................................................................................................................................14
Fluoro Mode Performance Check ...............................................................................................................................................15
Film Mode Performance Check...................................................................................................................................................16
Mechanical Movement Check .....................................................................................................................................................16
Brakes ....................................................................................................................................................................................16
Wheels/Casters ......................................................................................................................................................................17
Wig Wag .................................................................................................................................................................................17
Flip Flop (Standard C-Arms only) ...........................................................................................................................................17
L-Rotation ...............................................................................................................................................................................17
Orbital .....................................................................................................................................................................................17
Vertical Lift/.............................................................................................................................................................................18
Horizontal Cross-Arm .............................................................................................................................................................18
Fault Isolation.................................................................................................................................................................................19
Boot Test .....................................................................................................................................................................................19
Fluoro Mode ................................................................................................................................................................................20
Film Mode....................................................................................................................................................................................21
Mechanical Movement ................................................................................................................................................................21
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Schematics Illustrated Parts Installation

C-Arm Subsystem
Circuit/Mechanical Descriptions
The following paragraphs describe basic electrical and physical features of the 9800 SERIES C-Arm Subsystem (referred to
hereafter as the C-Arm). Subsequent chapters in this manual explain subsystem operation in functional concepts, focusing on
how subsystem components interact in providing those functions. You can obtain additional information from the C-Arm
Interconnect Diagram and Operators Manual, and the Workstation Operators and Service Manuals.
Subsystem Description
The C-Arms derive their name from the rigid, C-shaped weldment that supports the Image Intensifier, collimator, CCD Camera,
and X-ray tube. These components together are commonly called the “C”, and the entire assembly from the casters up is known
as the “C-Arm”.
The X-Ray tube generates an X-ray beam that is shaped and oriented by the collimator. After passing through patient anatomy,
the beam is directed onto a film cassette to produce a radiographic film image, or through the image intensifier and CCD camera
(charge-coupled device), to convert the X-ray image to a video signal that is transmitted to the Workstation for display,
processing, and storage.
There are several options and variations of C-Arm (see table following). Image Intensifiers are available in 9-inch and 12-inch
sizes. The larger, more expensive II is often necessary for cardiac and vascular studies that require images of larger areas of the
body. The smaller II is useful in extremity imaging and other routine applications.
The Super C is often used in cardiac studies that require oblique views through the body, although it has proven useful in other
applications as well. The Super C-Arm is similar to the standard C-Arm except that it has a larger diameter C, which mounts
directly on the end of the Cross Arm. Due to geometric characteristics, there are variations in the types of motions of which each
is capable (see following table).
A Cardiac C-Arm must be able to generate high technique in a pulsed mode to support dynamic cardiac and vascular studies.
These studies can be recorded to disk or tape and replayed showing detailed, real-time movement. The Cardiac C-Arm capacity
is increased by software options that enable the generator to produce higher technique X-ray pulses than the standard C-Arm.
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Schematics Illustrated Parts Installation

C-Arm Subsystem
C-Arm Variation
Standard C-Arm Super C
Cardiac Cardiac
Non-cardiac Non-cardiac
9-inch Image Intensifier 9-inch Imge Intensifier
Options
12-inch Imge Intensifier ---
Wig Wag Wig Wag
L-Arm L-Rotation
Orbital Orbital
Flip Flop ---
Horizontal Cross-Arm Horizontal Cross-Arm
Positioning
Vertical Lift Vertical Lift
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Schematics Illustrated Parts Installation

C-Arm Subsystem
Vertical Lift Column
L-Arm
Radial Assembly
Horizontal Cross-Arm
Orbital Assembly
L-Rotation
Control
Flip Flop
Standard C-Arm Mechanical Movement Systems
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Schematics Illustrated Parts Installation

C-Arm Subsystem
Horizontal Cross Arm
Flip-Flop
L-Rotation
Orbital
Vertical Lift
Wig-Wag
Standard C-Arm Motions
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Schematics Illustrated Parts Installation

C-Arm Subsystem
Rear Cover Assembly Cross Beam End Cap
Front Leg Cover
Collimator Cover
Camera Cover
Vertical Column
L-Rotation Assembly
X-Ray Tube Cover
Right Front Cover
(Left Front Cover similar, not shown for clarity)
Control Panel Housing
Super-C Mechanical Movement Systems
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Schematics Illustrated Parts Installation

C-Arm Subsystem
Horizontal Cross Arm
Orbital
L-Rotation
Vertical Lift
Wig-Wag
Super C Motions
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Schematics Illustrated Parts Installation

C-Arm Subsystem
Major Assembly and Control Locations
The following diagrams indicate the location of the major assemblies and controls of the standard C-Arm and the Super-C, or the
covers by which they are accessed.
Vertical Column
L-Rotation Assembly Collimator Cover
X-Ray Tube Cover
Front Top Cover
Front Leg Cover
Right Front Cover
(Left Front Cover similar, not shown for clarity)
Cross Beam End Cap
Rear Cover Assembly
Control Panel Housing
Camera Cover
Image Intensifier
Standard C-Arm Subsystem Major Assembly and Control Locations
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Schematics Illustrated Parts Installation

C-Arm Subsystem
The following table lists the primary components of the standard C-Arm associated with the major assemblies shown in the
previous diagram, for the purpose of indicating physical location.
Location Major Assemblies
Control Panel Housing Assembly Left and Right Hand Control Panels
Control Panel Processor I/O PCB
Control Processor Assembly
Vacuum Fluorescent Display (VFD) Modules (2)
Camera Cover CCD Camera
Image Intensifier Image Intensifier Power Supply
Vertical Column Lift Column
L-Rotational Arm Assembly L-Rotation Mechanical Assembly
Flip Flop
Gas Shock
Collimator Cover Primary and secondary Collimator
X-ray Tube Cover Thermal Switch
Temperature Sensor
X-ray Tube
Front Top Cover Power/Motor PCB
Front Leg Cover Front Caster
Steering Chain
Cable Pushers
Right Front Cover Capacitor/Power Module
Left Front Cover Stator/Pre-charge Transformer
Multi-output Transformer (PS 2)
Capacitors, Motor AC (2)
Power/Signal Interface PCB
Power Supply, +5/+12/±15 VDC (PS1)
Cross Beam End Cap (left and right
sides)
Part of rear steering system
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Schematics Illustrated Parts Installation