Service Manual
490 Pages
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Page 1
OEC® 9800 C-Arm Service Manual • Front Matter
• Collimator
• Introduction/Safety
• Image Control
• C-Arm Subsystem
• Cooling
• AC Power Distribution
• Flip Flop Motion
• DC Power Distribution
• Orbital Motion
• Battery Charging
• Wig Wag Motion
• System Communications
• Horizontal Cross Arm Motion
• Interlocks
• L-Arm Motion
• Stator Power and Control
• Vertical Column Motion
• Pre-Charging
• Steering and Braking
• X-Ray On, X-Ray Disable
• Diagnostics
• kV Generation
• Calibration
• mA Generation
• Replacement
• Automatic Brightness Stabilization
Contents
Installation
Service
Schematics
Periodic Maintenance
Illustrated Parts
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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Periodic Maintenance
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C-Arm Subsystem
C-Arm Variation Standard C-Arm Options
Positioning
Super C
Cardiac
Cardiac
Non-cardiac
Non-cardiac
9-inch Image Intensifier
9-inch Imge Intensifier
12-inch Imge Intensifier
---
Wig Wag
Wig Wag
L-Arm
L-Rotation
Orbital
Orbital
Flip Flop
---
Horizontal Cross-Arm
Horizontal Cross-Arm
Vertical Lift
Vertical Lift
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C-Arm Subsystem
L-Rotation Control
Horizontal Cross-Arm
Orbital Assembly L-Arm Radial Assembly
Flip Flop
Vertical Lift Column
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
Camera Cover
Control Panel Housing
L-Rotation Assembly Vertical Column
Collimator Cover
X-Ray Tube Cover Front Leg Cover
Right Front Cover (Left Front Cover similar, not shown for clarity)
Rear Cover Assembly
Cross Beam End Cap
Super-C Mechanical Movement Systems
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C-Arm Subsystem
Orbital
L-Rotation
Horizontal Cross Arm
Wig-Wag
Vertical Lift
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. Camera Cover
Image Intensifier Control Panel Housing 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
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 Control Panel Housing Assembly
Camera Cover Image Intensifier Vertical Column L-Rotational Arm Assembly
Collimator Cover X-ray Tube Cover
Front Top Cover Front Leg Cover
Right Front Cover Left Front Cover
Cross Beam End Cap (left and right sides)
Major Assemblies Left and Right Hand Control Panels Control Panel Processor I/O PCB Control Processor Assembly Vacuum Fluorescent Display (VFD) Modules (2) CCD Camera Image Intensifier Power Supply Lift Column L-Rotation Mechanical Assembly Flip Flop Gas Shock Primary and secondary Collimator Thermal Switch Temperature Sensor X-ray Tube Power/Motor PCB Front Caster Steering Chain Cable Pushers Capacitor/Power Module Stator/Pre-charge Transformer Multi-output Transformer (PS 2) Capacitors, Motor AC (2) Power/Signal Interface PCB Power Supply, +5/+12/±15 VDC (PS1) Part of rear steering system
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Location Rear Cover Assembly
Major Assemblies 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
Camera Cover
Control Panel Housing Image Intensifier
L-Rotation Assembly Vertical Column
Collimator Cover
X-Ray Tube Cover Front Leg Cover
Right Front Cover (Left Front Cover similar, not shown for clarity)
Rear Cover Assembly
Cross Beam End Cap
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 Control Panel Housing Assembly
Camera Cover Vertical Column L-Rotation Assembly Collimator Cover X-ray Tube Cover
Front Top Cover Front Leg Cover
Right Front Cover Left Front Cover
Cross Beam End Cap (left and right sides)
Major Assemblies Left and Right Hand Control Panels Control Panel Processor I/O PCB Control Processor Assembly Vacuum Fluorescent Display (VFD) Modules (2) CCD Camera Image Intensifier Lift Column L-Arm Mechanical Assembly Gas Shock Primary and secondary Collimator Thermal Switch Temperature Sensor X-ray Tube Power/Motor PCB Front Caster Steering Chain Cable Pushers Capacitor/Power Module Stator/Pre-charge Transformer Multi-output Transformer (PS 2) Capacitors, Motor AC (2) Power/Signal Interface PCB Power Supply, +5/+12/±15 VDC (PS1) Part of rear steering system
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Location Rear Cover Assembly
Major Assemblies 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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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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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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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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2.
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.
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 Carm 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 Carm 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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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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