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X-Ray & ABS
X-Ray & ABS
Circuit/Mechanical Descriptions.....................................................................................................................................................3
Overview .......................................................................................................................................................................................3
Power-on Sequence......................................................................................................................................................................6
Exception handling ........................................................................................................................................................................6
CANbus .........................................................................................................................................................................................6
Rotor Control and Braking.............................................................................................................................................................7
High Speed Rotation.................................................................................................................................................................7
Tube Heat Sensing........................................................................................................................................................................7
X-Ray On/Disable..........................................................................................................................................................................7
Generator Control..........................................................................................................................................................................8
Manual kVp Control ..................................................................................................................................................................8
Manual mA/mAs Control...........................................................................................................................................................9
Auto Fluoro Mode ...................................................................................................................................................................10
Auto Brightness Stabilization Control (ABS)...........................................................................................................................10
Pulse.......................................................................................................................................................................................12
Low Dose................................................................................................................................................................................13
X-Ray Footswitch....................................................................................................................................................................14
Fault Isolation.................................................................................................................................................................................15
Functional Tests.............................................................................................................................................................................17
Beam Alignment Verification .......................................................................................................................................................17
Fluoro Alignment.....................................................................................................................................................................17
Film Alignment ........................................................................................................................................................................17
Disassembly ...........................................................................................................................................................................18
X-Ray Stator Test........................................................................................................................................................................20
kVp/mA Servo Loop Test ............................................................................................................................................................20
Auto Technique Tracking ............................................................................................................................................................21
Boost ...........................................................................................................................................................................................21
Pulsed Boost ...............................................................................................................................................................................22
Verify Fluoro Timer and Timer Test.............................................................................................................................................22
Generator PCB LEDs .....................................................................................................................................................................23
Introduction..................................................................................................................................................................................23
kV Measure PCB.........................................................................................................................................................................23
Contents
Installation
Service
Schematics
Periodic Maintenance
1
Illustrated Parts
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Summary of Contents for Archive OEC UroView 2800
- Page 1 X-Ray & ABS X-Ray & ABS Circuit/Mechanical Descriptions..............................3 Overview .......................................3 Power-on Sequence..................................6 Exception handling ..................................6 CANbus ......................................6 Rotor Control and Braking................................7 High Speed Rotation.................................7 Tube Heat Sensing..................................7 X-Ray On/Disable..................................7 Generator Control..................................8 Manual kVp Control ..................................8 Manual mA/mAs Control................................9 Auto Fluoro Mode ...................................10 Auto Brightness Stabilization Control (ABS)...........................10 Pulse.......................................12 Low Dose....................................13...
- Page 2 X-Ray & ABS Filament Drive PCB..................................25 Rotation PCB....................................27 Indicators ....................................29 J2 Wiring....................................29 Gate CMD PCB ...................................30 kV Control PCB ...................................32 Switches and Jumpers................................33 Indicators ....................................33 AC/DC 3-Phase PCB ..................................34 AC/DC Single Phase PCB................................36 AEC PCB V2 ....................................38 IGBT PCB....................................40 LVPS-400 PCB....................................41 Contents Installation Service...
- Page 3 X-Ray & ABS Circuit/Mechanical Descriptions Overview The OEC UroView® 2800 Generator is part of a family of compact high frequency X-Ray generators. The various generators operate on the following voltage and wattage ranges: Three Phase 80 kW 65 kW 480 VAC Three Phase 80 kW 65 kW...
- Page 4 X-Ray & ABS The inverter block is composed of two assemblies, the High Voltage tank and the Inverter power assembly. The High Voltage tank contains the kV measure along with high voltage power components and connections for the HV Cables for the X-ray tube. The Inverter power assembly contains the Generic Interface PCB, AEC PCB, the PPC kV Control PCB, the IGBT PCB and the Gate Command PCB.
- Page 5 X-Ray & ABS Generator Assembly Diagram Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...
- Page 6 X-Ray & ABS Power-on Sequence Generator power-on is achieved by various means, depending on system configuration (circuit breaker, console ON/OFF, PDU contactor). In all cases, generator power-on starts when input power is applied. For a three-phase generator, the low voltage power supply utilizes 220V supplied by the system independently of the three-phase input.
- Page 7 X-Ray & ABS Rotor Control and Braking The rotation function involves the Rotation PCB, the rotation capacitors module and the tube stator. The high-speed Rotation PCB utilizes a low speed of 60 Hz for 3600 rpm and 160 Hz for 9600 rpm. High Speed Rotation Since the rotation function is regulated by an inverter that consists of six Insulated Gate Bipolar Transistors (IGBTs).
- Page 8 X-Ray & ABS The generator monitors the X-ray control lines and reports an error if any are active in the standby state. The X-RAY SWITCH STUCK message is displayed when an X-ray control is sensed in an “on” state (stuck) during system startup. This error applies to the Left or Right X-ray controls.
- Page 9 X-Ray & ABS Manual mA/mAs Control The manual mA/mAs control key on the X-Ray Control Console allows manual setting of the mA/mAs value by the operator for film or fluoroscopy. When pressed, the button code is sensed by the X-Ray Console Switch Matrix. The code to increase or decrease the mA/mAs value is sent to the X-Ray Control Console Interface PCB and is delivered to the X-Ray Control Console CPU card plugged into the X-Ray Control Console backplane.
- Page 10 X-Ray & ABS Auto Fluoro Mode The Auto Fluoro Mode button on the X-Ray Control Console enables Automatic Brightness Stabilization (ABS) control of the kVp, mA, and camera gain technique. When the Auto Fluoro Mode button is pressed, the button code is sensed by the X-Ray Console Switch Matrix.
- Page 11 X-Ray & ABS ABS Control during Auto Fluoro Mode Function Description ABS adjusts the kVp index value until the video level equals the value contained in the video level index. ABS adjusts the mA value. Camera Gain ABS adjusts the Camera Gain Camera Iris Iris fully open KVp, mA, and Camera Gain are “looked up”...
- Page 12 X-Ray & ABS ABS Control during Pulsed Boost Fluoro Mode Function Description kVp frozen at its current value by software. mA is incremented until the video level equals the video level index. Camera Gain Camera Gain is reduced, and the ABS system adjusts mA to achieve correct video level.
- Page 13 X-Ray & ABS Pressing the Pulse button on the X-Ray Control Console to enable pulsed imaging uses the pulse rate as currently selected from the Pulse rates are: Workstation MODE screen. System Displayed Real System Pulse Width Video Rate Rate Pulse Rate in ms 30 FPS...
- Page 14 X-Ray & ABS When the Low Dose Mode button is pressed, the button code is sensed by the X-Ray Console Switch Matrix. The code is sent to the console X-Ray Control Interface PCB and is delivered to the X-Ray Control Console CPU card plugged into the X-Ray Control Console Backplane.
- Page 15 X-Ray & ABS Fault Isolation Test: Failure: Check: Perform Stator Motor Test DS1 and DS2 are off Interlock circuit No whirring sound? Analog interface outputs Error Message displayed Pwr/Mtr relay CB2 Phase Capacitor C5 Stator motor wire harness and transformer. (See Diagnostics section.) kVp/mA Servo Loop Test Error message displayed...
- Page 16 X-Ray & ABS Test: Failure: Check: Perform the Generator mA, mAs max/min values out Perform Generator Performance Check. Functional Check of tolerance. Check individual PCB adjustments as shown in Adjustments section. (See Diagnostics section.) Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...
- Page 17 X-Ray & ABS Functional Tests Beam Alignment Verification Omit the Film portion of this procedure when verifying Beam Alignment on systems without film capability. For regulatory purposes, SID measurements are: Film = 45 inches, Fluoro = 47 inches. If Beam Alignment Verification fails, perform a Beam Alignment procedure.
- Page 18 X-Ray & ABS Disassembly The Invasive mA Measure can be made only on the left side of the Inverter Unit. (Refer to the Generator Assembly Diagram in this section.) 1. Unscrew the screws (see note below) securing the two EMC cover panels (1) on the HV connections side and remove them. Note: Do not to let screws fall into the HV connector receptacles.
- Page 19 X-Ray & ABS Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...
- Page 20 X-Ray & ABS Put a probe inside the generator on the shunt SH3 (left side of the resistor or the big yellow capacitor in parallel, C8 of kV Measure PCB on HV Tank (2). Connect a second probe on the mechanical ground (3). Check the resistor value with a multi-meter.
- Page 21 X-Ray & ABS Auto Technique Tracking WARNING: Steps within this procedure produce x-rays. Use appropriate precautions. Select Auto Fluoro mode and the NORM field size Verify that the kVp tracks accurately according to the following table, as copper filters are inserted into the field. Tape the filters to the Collimator –...
- Page 22 X-Ray & ABS Pulsed Boost WARNING: Steps within this procedure produce x-rays. Use appropriate precautions. 1. With BOOST enabled, select PULSE on the control panel. 2. Select AUTO Fluoro mode and take an exposure. Once the image has stabilized, take another by pressing on the BOOST footswitch.
- Page 23 X-Ray & ABS Generator PCB LEDs Introduction This section shows the circuit boards of the OEC Uroview® 2800 generator. In the illustrations, the main indicators (LEDs and fuses) are detailed. kV Measure PCB Caution: This board forms part of the oil seal of the High Voltage Tank. It can only be removed at the factory. The Field Replaceable Unit (FRU) is the complete HV Tank.
- Page 24 X-Ray & ABS Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...
- Page 25 X-Ray & ABS Filament Drive PCB WARNING: High Voltage: Do not attempt to service the generator until indicator DS3 is extinguished. Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...
- Page 26 X-Ray & ABS 160v LF Common DS3 - Green - +160v DC present 160v DS4 - Yellow - Inverter Output Running SF_LF - Yellow - Small ON - Yellow - Inverter Focus / Large Focus Command ON Relay Feedback RST - Red - Board being reset or powered up DS2 - Yellow - Status DS1 - Yellow - Status...
- Page 27 X-Ray & ABS Rotation PCB WARNING: High Voltage: Do not attempt to service the generator until indicators DS6 and DS7 (neon-orange) are extinguished. Even when the LEDs are extinguished, the voltage could still be over +90 volts. Check the DC Bus first with a DVM before performing any service on this PCB.
- Page 28 X-Ray & ABS Auxiliary Common DC bus DC bus Main DC bus Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...
- Page 29 X-Ray & ABS Indicators INDICATOR COLOR INDICATES: RESET BOARD BEING RESET OR POWERED UP INV_ON Yellow THE INVERTER IS RUNNING Green PRESENCE OF +15 V SUPPLY Green PRESENCE OF -15 V SUPPLY Green PRESENCE OF +5 V SUPPLY DS4-DS5 Yellow BOARD STATUS Neon (orange) FAN VAC POWER SUPPLY PRESENT...
- Page 30 X-Ray & ABS Gate CMD PCB WARNING: High voltage: Do not touch this PCB until DS300 on this PCB and DS1 on the Dual Snubber PCB are extinguished Caution: Hot surface on transformer T300 and heat sink. Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...
- Page 31 X-Ray & ABS DS300 - Neon (Orange) - DC bus Presence of voltage on DC bus for Flyback Converter to DS200 flashes during create power supplies for pulsed fluoro; is on steady both Gate Commands for regular X-ray (Fluoro). DS200 - Yellow - High IGBT* (Q200) Gate Command running DS202 - Green - Presence...
- Page 32 X-Ray & ABS kV Control PCB Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...
- Page 33 X-Ray & ABS Switches and Jumpers SWITCH OR FUNCTION JUMPER RESET PUSH BUTTON Indicators INDICATOR COLOR INDICATES: CONF FIELD PROGRAMMABLE GATE ARRAY (FPGA) CONFIGURATION NOT ACCOMPLISHED Yellow INVERTER GATE POWER SUPPLY OK TX_TAV Yellow TRANSMIT TO SERVICE LAPTOP RX_TAV Yellow RECEIVE FROM SERVICE LAPTOP TX_CONS Yellow...
- Page 34 X-Ray & ABS AC/DC 3-Phase PCB High voltage: Do not attempt to service generator until DS1 (neon - orange) is extinguished. Even WARNING: when the LEDs are extinguished, the voltage could still be over +90 volts. Check the DC Bus first with a DVM before performing any service on this PCB.
- Page 35 X-Ray & ABS DC Bus to DC Bus out F1 - Fuse - Protects (on DC Bus): DS1 - Neon LV Power Supply 3-Phase PCB (Orange) – Indi Rotor Board High Speed cates presence Gate Command PCB of voltage on the Type: 15 A, 600 VDC DC Bus.
- Page 36 X-Ray & ABS AC/DC Single Phase PCB This PCB is only used with the single-phase generator. Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...
- Page 37 X-Ray & ABS Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...
- Page 38 X-Ray & ABS AEC PCB V2 N1 - Orange (neon) - AEC4 AEC3 AEC1 AEC2 Presence of 230 VDC Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...
- Page 39 X-Ray & ABS Test Points TESTPOINT MEASUREMENT SIGNAL RANGE 230 VDC 230 VDC _5% 230 VDC 230 VDC _5% 230 VDC 230 VDC _5% 230 VDC 230 VDC _5% AEC assignment reference 0 to 10 V 10 VDC (reference) 10 VDC _1% AEC return voltage AEC1 return voltage AEC2 return voltage...
- Page 40 X-Ray & ABS IGBT PCB WARNING: High voltage: Do not attempt to service the generator until indicator DS1 (neon - orange) is extinguished. DS1 / DS2 - LED (green) - Indicates presence of voltage on DC Bus Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...
- Page 41 X-Ray & ABS LVPS-400 PCB High Voltage: Do not attempt to service the generator until DS8 (neon - orange) is extinguished. Even WARNING: when the LEDs are extinguished, the voltage could still be over +90 volts. Check the DC Bus first with a DVM before performing any service on this PCB.
- Page 42 X-Ray & ABS Contents Installation Service Schematics Periodic Maintenance Illustrated Parts...