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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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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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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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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C-Arm Subsystem
Horizontal Cross Arm
Flip-Flop
L-Rotation
Orbital
Vertical Lift
Wig-Wag
Standard C-Arm Motions
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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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C-Arm Subsystem
Horizontal Cross Arm
Orbital
L-Rotation
Vertical Lift
Wig-Wag
Super C Motions
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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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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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C-Arm Subsystem
Location Major Assemblies
Rear Cover Assembly Mechanical linkage of rear steering system
Battery Packs (2)
C-arm Backplane PCB
High Voltage Supply Regulator
486 X-ray Controller Assembly
Fluoro Functions PCB Assembly
Filament Driver PCB Assembly
Generator Driver PCB Assembly
High Voltage Tank
IGBT/Snubber Assembly
Power Supply, 24 VDC (PS 3)
Battery Charger PCB and capacitors
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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
Image Intensifier
Super-C Subsystem Major Assembly and Control Locations
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C-Arm Subsystem
The following table lists the primary components of the 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
Vertical Column Lift Column
L-Rotation Assembly L-Arm Mechanical Assembly
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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C-Arm Subsystem
Location Major Assemblies
Rear Cover Assembly Mechanical linkage of rear steering system
Battery Packs (2)
C-arm Backplane PCB
High Voltage Supply Regulator
486 X-ray Controller Assembly
Fluoro Functions PCB Assembly
Filament Driver PCB Assembly
Generator Driver PCB Assembly
High Voltage Tank
IGBT/Snubber Assembly
Power Supply, 24 VDC (PS 3)
Battery Charger PCB and capacitors
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C-Arm Subsystem
Subystem Functional Breakdown
The operation of the C-Arm has been divided into the functional groups listed below. The functional group name corresponds to
the applicable chapter tab in this manual, for easy access to the information indicated.
• AC Power Distribution • Collimator
• DC Power Distribution • Image Control
• Battery Charging • Cooling
• System Communications • Flip Flop
• Interlocks • Orbital Motion
• Stator Power and Control • Wig Wag Motion
• Pre-charge • Horizontal Cross Arm Motion
• X-ray On, X-ray Disable • L-arm
• kV Generation • Vertical Lift
• mA Generation • Steering and Braking
• Automatic Brightness Stabilization (ABS)
Functional Tests
Use the following tests to verify operational condition of the C-Arm. If the C-Arm fails any of these tests, refer to Fault Isolation, in
this chapter.
Boot Test
1. With the Workstation off, unplug the interconnect cable from the C-Arm. . If the Workstation is already connected to the wall
receptacle, you should hear a click from its internal electronics.
2. Verify that the Workstation AC Power plug is connected to the wall receptacle, or plug it in. You should hear one click from
the Workstation as power is connected.
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C-Arm Subsystem
3. Turn on the Workstation. You should hear a click. The Workstation should boot without making any beeping sounds. Then
turn it off.
4. Plug the interconnect cable into the C-Arm and listen for a click from the internal electronics of the Workstation. This click
signifies that the Workstation is properly connected to the C-Arm and the AC voltage from the wall receptacle is at the proper
voltage.
5. Verify the green “Battery” light on the C-Arm below the keyswitch is turned on about a second after the interconnect cable is
plugged in, occurring at the time of the click in step 4.
6. Turn on the Workstation and verify that all LEDs on the C-Arm control panel come on at one time and the Vacuum
Fluorescent Display illuminates a series of square patterns five at a time until the entire row of squares is ON.
7. Verify that the 20 arrows (>) on the C-Arm Vacuum Fluorescent Display light in succession until all 20 are lit, and then
displays default technique settings 72kVp and 2.3mA. This signifies that the Workstation and C-Arm have successfully
booted (this operation takes from 80 to 120 seconds depending upon configuration). No error messages should appear
during bootup.
Fluoro Mode Performance Check
WARNING: This procedure produces X-rays. Take the appropriate precautions.
1. Boot the system as directed in the Boot Test section above, in this manual (if not already done).
2. Position the C-arm so that the X-ray head is directly above the image intensifier.
3. Place a suitable test object on the face of the image intensifier tube.
4. Set a technique of 72kVp/2mA.
5. Press the X-ray on switch. Verify that a digitized fluoro image of the object appears on the left monitor and that it remains
there after the exposure is terminated.
6. Select AUTO mode is selected. Verify that the LED next to the AUTO key turns on.
7. Press the X-ray on switch. Verify that a digitized fluoro image of the object appears on the left monitor and that it remains
there after the exposure is terminated. Inspect image for acceptable image quality.
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C-Arm Subsystem
8. Connect the footswitch and hand control and while pressing a footswitch or hand switch X-ray switch. Verify operation of the
following:
a. Image orientation keys: rotation and image reversal.
b. Field size selection keys: NORM, MAG1 and MAG2.
c. Motorized collimation controls: leaf rotation, iris collimation, and leaves open and close.
d. The MODE switch (vascular systems only).
Film Mode Performance Check
WARNING: This procedure produces X-rays. Take the appropriate precautions.
1. Boot the system and perform the Fluoro Mode test, as directed in the Boot Test section above, in this manual,
2. Select FILM mode and enter the technique: 60 kVp @ 2.5 mAs.
3. Install the film cassette holder on the image intensifier and load a film cassette.
4. Press the footswitch. If the system has been idle for some time, listen for a whirring sound as the anode accelerates
approximately 2 seconds before the X-ray switch indicator illuminates.
5. Release the footswitch after you hear three beeps.
6. Develop the film and inspect the exposure.
Mechanical Movement Check
Brakes
1. Engage the Wig-Wag brake and verify that the brake prevents Wig-Wag movement.
2. Tighten the Flip Flop brake and verify that the Flip Flop does not move.
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C-Arm Subsystem
3. Engage the C-Arm Orbital brake and verify that the C-Arm does not move.
4. Engage the Horizontal Cross-Arm brake and verify that the Cross-Arm does not move.
5. Engage the L-Arm brake and verify that the L-Arm does not move.
6. Engage the C-Arm wheel brake and then attempt to push the C-Arm. The wheels should not roll.
Wheels/Casters
Push the C-Arm and verify that the wheels roll smoothly, the casters turn freely and that the wheels are securely attached to the
casters. Visually inspect the wheels for damage.
Wig Wag
Release the Wig-Wag brake and verify that the forward mechanics move laterally approximately ± 10° (20° total).
Flip Flop (Standard C-Arms only)
Release the Flip Flop brake and verify that the C-arm "flip-flops" through its entire range smoothly without roughness or vibration.
L-Rotation
Perform the following to verify radial rotation on Standard C-Arms and Super C-Arms:
1. On a standard C-Arm release the L-Arm brake and verify smooth rotation without roughness or vibration.
2. On a Super C-Arm release the L-Rotation brake and verify smooth rotation without roughness or vibration.
Orbital
Perform the following to verify orbital rotation for standard C-arms and Super C-arms:
1. On Standard C-arms, release the L-Arm brake and check C-arm rotation in the following positions:
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C-Arm Subsystem
a. Position the C-arm parallel with the floor and lock the L-Arm brake. Rotate the C-arm through its entire range. The C-arm
should rotate smoothly without vibration.
b. Position the C-arm on the opposite side and lock the L-Arm brake. Rotate the C-arm through its entire range. The C-arm
should rotate smoothly without vibration.
c. Position the C-arm vertical to the floor, lock the L-Arm brake and rotate the C-arm through its entire range. The C-arm
should rotate smoothly without vibration.
2. On Super C-arms, release the Flip Flop brake and check C-arm rotation in the following positions.
a. Position the C-arm parallel with the floor and lock the Flip-Flop brake. Rotate the C-arm through its entire range. The C-
arm should rotate smoothly without vibration.
b. Position the C-arm on the opposite side and lock the Flip-Flop brake. Rotate the C-arm through its entire range. The C-
arm should rotate smoothly without vibration.
c. Position the C-arm vertical to the floor, lock the Flip-Flop brake and rotate the C-arm through its entire range. The C-arm
should rotate smoothly without vibration.
Vertical Lift/
Boot the system, then press each vertical column motor switch through the full range of movement. During movement, press one
of the Fast Stop buttons. Verify that vertical movement stops, X-ray function is disabled, and the system shuts down. The vertical
lift should raise and lower fully and smoothly.
Horizontal Cross-Arm
Release the horizontal Cross-Arm brake and extend and retract the cross-arm. Verify that the cross-arm slides smoothly through
the housing without binding.
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C-Arm Subsystem
Fault Isolation
Boot Test
If the C-Arm failed the Boot Test, use the following fault isolation chart:
Problem Probable Cause or Remedy
No click heard when Interconnect
cable is unplugged from C-Arm.
Workstation not plugged into wall receptacle; Receptacle not powered (fuse blown or
circuit breaker tripped); 100-125V Workstation plugged into 200-250V outlet. Check
Workstation power cord is correct voltage type for Workstation power as labeled. Check
no external breakers CB1 through CB4 are tripped (white buttons are not protruding.) See
AC Power Distribution chapter of this manual.
No click heard when Workstation
plugged into AC power
100-125V Workstation plugged into 200-250V outlet; CB1 and/or CB2 tripped; Outlet
power is off or breaker tripped.
Workstation beeps, does not
boot, when switched on.
Isolation Transformer strapped incorrectly for applied AC voltage. Refer to AC Power
Distribution chapter of this manual.
Workstation totally inoperative. Check Workstation power and interconnect cables.
100-125V Workstation plugged into 200-250V outlet; CB1 and/or CB2 tripped; Outlet
power is off or breaker tripped.
Isolation Transformer strapped incorrectly for applied AC voltage.
Refer to the AC Power Distribution chapter of this manual.
No click heard when Interconnect
cable plugged into C-Arm.
Interconnect cable problem. Refer to AC Power Distribution..
Battery Charger light did not turn
on.
Interconnect cable problem; Connector loose. Refer to AC Power Distribution chapter of
this manual
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