Hispeed Xi Safety Guidelines

Technical Publications 2197417 Revision 7

CT HiSpeed Series Safety Guidelines/EMC

Copyrighte 1998–2001 by General Electric Company

Operating Documentation

CT HISPEED SERIES SAFETY GUIDELINES / EMC

GE MEDICAL SYSTEMS REV 0

2197417

D THIS SERVICE MANUAL IS AVAILABLE IN ENGLISH ONLY.

WARNING

D IF A CUSTOMER’S SERVICE PROVIDER REQUIRES A LANGUAGE OTHER THAN ENGLISH, IT IS THE CUSTOMER’S RESPONSIBILITY TO PROVIDE TRANSLATION SERVICES. D DO NOT ATTEMPT TO SERVICE THE EQUIPMENT UNLESS THIS SERVICE MANUAL HAS BEEN CONSULTED AND IS UNDERSTOOD. D FAILURE TO HEED THIS WARNING MAY RESULT IN INJURY TO THE SERVICE PROVIDER, OPERATOR OR PATIENT FROM ELECTRIC SHOCK, MECHANICAL OR OTHER HAZARDS.

D CE MANUEL DE MAINTENANCE N’EST DISPONIBLE QU’EN ANGLAIS.

AVERTISSEMENT

D SI LE TECHNICIEN DU CLIENT A BESOIN DE CE MANUEL DANS UNE AUTRE LANGUE QUE L’ANGLAIS, C’EST AU CLIENT QU’IL INCOMBE DE LE FAIRE TRADUIRE. D NE PAS TENTER D’INTERVENTION SUR LES ÉQUIPEMENTS TANT QUE LE MANUEL SERVICE N’A PAS ÉTÉ CONSULTÉ ET COMPRIS. D LE NON-RESPECT DE CET AVERTISSEMENT PEUT ENTRAÎNER CHEZ LE TECHNICIEN, L’OPÉRATEUR OU LE PATIENT DES BLESSURES DUES À DES DANGERS ÉLECTRIQUES, MÉCANIQUES OU AUTRES.

WARNUNG

D DIESES KUNDENDIENST–HANDBUCH EXISTIERT NUR IN ENGLISCHER SPRACHE. D FALLS EIN FREMDER KUNDENDIENST EINE ANDERE SPRACHE BENÖTIGT, IST ES AUFGABE DES KUNDEN FÜR EINE ENTSPRECHENDE ÜBERSETZUNG ZU SORGEN. D VERSUCHEN SIE NICHT, DAS GERÄT ZU REPARIEREN, BEVOR DIESES KUNDENDIENST–HANDBUCH NICHT ZU RATE GEZOGEN UND VERSTANDEN WURDE. D WIRD DIESE WARNUNG NICHT BEACHTET, SO KANN ES ZU VERLETZUNGEN DES KUNDENDIENSTTECHNIKERS, DES BEDIENERS ODER DES PATIENTEN DURCH ELEKTRISCHE SCHLÄGE, MECHANISCHE ODER SONSTIGE GEFAHREN KOMMEN.

D ESTE MANUAL DE SERVICIO SÓLO EXISTE EN INGLÉS.

AVISO

D SI ALGÚN PROVEEDOR DE SERVICIOS AJENO A GEMS SOLICITA UN IDIOMA QUE NO SEA EL INGLÉS, ES RESPONSABILIDAD DEL CLIENTE OFRECER UN SERVICIO DE TRADUCCIÓN. D NO SE DEBERÁ DAR SERVICIO TÉCNICO AL EQUIPO, SIN HABER CONSULTADO Y COMPRENDIDO ESTE MANUAL DE SERVICIO. D LA NO OBSERVANCIA DEL PRESENTE AVISO PUEDE DAR LUGAR A QUE EL PROVEEDOR DE SERVICIOS, EL OPERADOR O EL PACIENTE SUFRAN LESIONES PROVOCADAS POR CAUSAS ELÉCTRICAS, MECÁNICAS O DE OTRA NATURALEZA.

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ATENÇÃO

D ESTE MANUAL DE ASSISTÊNCIA TÉCNICA SÓ SE ENCONTRA DISPONÍVEL EM INGLÊS. D SE QUALQUER OUTRO SERVIÇO DE ASSISTÊNCIA TÉCNICA, QUE NÃO A GEMS, SOLICITAR ESTES MANUAIS NOUTRO IDIOMA, É DA RESPONSABILIDADE DO CLIENTE FORNECER OS SERVIÇOS DE TRADUÇÃO. D NÃO TENTE REPARAR O EQUIPAMENTO SEM TER CONSULTADO E COMPREENDIDO ESTE MANUAL DE ASSISTÊNCIA TÉCNICA. D O NÃO CUMPRIMENTO DESTE AVISO PODE POR EM PERIGO A SEGURANÇA DO TÉCNICO, OPERADOR OU PACIENTE DEVIDO A‘ CHOQUES ELÉTRICOS, MECÂNICOS OU OUTROS.

AVVERTENZA

D IL PRESENTE MANUALE DI MANUTENZIONE È DISPONIBILE SOLTANTO IN INGLESE. D SE UN ADDETTO ALLA MANUTENZIONE ESTERNO ALLA GEMS RICHIEDE IL MANUALE IN UNA LINGUA DIVERSA, IL CLIENTE È TENUTO A PROVVEDERE DIRETTAMENTE ALLA TRADUZIONE. D SI PROCEDA ALLA MANUTENZIONE DELL’APPARECCHIATURA SOLO DOPO AVER CONSULTATO IL PRESENTE MANUALE ED AVERNE COMPRESO IL CONTENUTO. D NON TENERE CONTO DELLA PRESENTE AVVERTENZA POTREBBE FAR COMPIERE OPERAZIONI DA CUI DERIVINO LESIONI ALL’ADDETTO ALLA MANUTENZIONE, ALL’UTILIZZATORE ED AL PAZIENTE PER FOLGORAZIONE ELETTRICA, PER URTI MECCANICI OD ALTRI RISCHI.

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IMPORTANT! . . . X-RAY PROTECTION X-ray equipment if not properly used may cause injury. Accordingly, the instructions herein contained should be thoroughly read and understood by everyone who will use the equipment before you attempt to place this equipment in operation. The General Electric Company, Medical Systems Group, will be glad to assist and cooperate in placing this equipment in use. Although this apparatus incorporates a high degree of protection against x-radiation other than the useful beam, no practical design of equipment can provide complete protection. Nor can any practical design compel the operator to take adequate precautions to prevent the possibility of any persons carelessly exposing themselves or others to radiation. It is important that everyone having anything to do with x-radiation be properly trained and fully acquainted with the recommendations of the National Council on Radiation Protection and Measurements as published in NCRP Reports available from NCRP Publications, 7910 Woodmont Avenue, Room 1016, Bethesda, Maryland 20814, and of the International Commission on Radiation Protection, and take adequate steps to protect against injury. The equipment is sold with the understanding that the General Electric Company, Medical Systems Group, its agents, and representatives have no responsibility for injury or damage which may result from improper use of the equipment. Various protective material and devices are available. It is urged that such materials or devices be used.

CERTIFIED ELECTRICAL CONTRACTOR STATEMENT All electrical installations that are preliminary to positioning of the equipment at the site prepared for the equipment shall be performed by licensed electrical contractors. In addition, electrical feeds into the Power Distribution Unit shall be performed by licensed electrical contractors. Other connections between pieces of electrical equipment, calibrations, and testing shall be performed by qualified GE Medical personnel. The products involved (and the accompanying electrical installations) are highly sophisticated, and special engineering competence is required. In performing all electrical work on these products, GE will use its own specially trained field engineers. All of GE’s electrical work on these products will comply with the requirements of the applicable electrical codes. The purchaser of GE equipment shall only utilize qualified personnel (i.e., GE’s field engineers, personnel of third-party service companies with equivalent training, or licensed electricians) to perform electrical servicing on the equipment.

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DAMAGE IN TRANSPORTATION All packages should be closely examined at time of delivery. If damage is apparent, have notation “damage in shipment” written on all copies of the freight or express bill before delivery is accepted or “signed for” by a General Electric representative or a hospital receiving agent. Whether noted or concealed, damage MUST be reported to the carrier immediately upon discovery, or in any event, within 14 days after receipt, and the contents and containers held for inspection by the carrier. A transportation company will not pay a claim for damage if an inspection is not requested within this 14 day period. Call Traffic and Transportation, Milwaukee, WI (414) 827–3449 / 8*285–3449 immediately after damage is found. At this time be ready to supply name of carrier, delivery date, consignee name, freight or express bill number, item damaged and extent of damage. Complete instructions regarding claim procedure are found in Section “S” of the Policy & Procedure Bulletins.

OMISSIONS & ERRORS GE personnel, please use the GEMS CQA Process to report all omissions, errors, and defects in this documentation. Customers, please contact your GE Sales or Service represenatives.

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CAUTION Do not use the following devices near this equipment. Use of these devices near this equipment could cause this equipment to malfunction. Devices not to be used near this equipment: Devices which intrinsically transmit radio waves such as; cellular phone, radio transceiver, mobile radio transmitter, radio–controlled toy, etc. Keep power to these devices turned off when near this equipment. Medical staff in charge of this equipment is required to instruct technicians, patients and other people who may be around this equipment to fully comply with the above regulation.

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LIST OF EFFECTIVE PAGES Tab – Section

Page

REV

–

Title page

7

Title page rear

blank

(Warning and other important information)

a to e

0

(Revision Information)

A

7

1 (Safety Guidelines)

i

7

1–1 to 1–4

6

Introduction

Gantry Safety Awareness

2–1 to 2–18

7

PDU Safety Awareness

3–1 to 3–5

7

Emergency Controls Summary

4–1 to 4–2

6

i

0

1–1 to 1–2

6

A–1 to A–4

6

Blank/Rear cover

–

2 (EMC) EMC

Appendix Symbols and Classification

–

REVISION HISTORY REV

Date

Primary Reason for Change

7

10/05/01

–

Added: PDU2.

6

7/06/00

–

Colored all the sections and Appendix A. Removed ‘Contents’ page.

EMC

Updated EMC requirements (EMC Performance and Installation Notice).

5

12/17/99

–

PDU Voltage, Oil Leakage hazard

4

8/13/99

–

Gantry Electrical Hazard

3

10/31/98

–

XG Caution

2

7/10/98

–

Lock out/Tag out description

1

4/10/98

–

TGP Reset Caution from the OC

0

3/27/98

–

Initial release.

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SAFETY GUIDELINES

TABLE OF CONTENTS SECTION

PAGE

SECTION 1 – INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1-2 1-3

1–1

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OPERATOR CONSOLE HAZARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–1 1–3 1–4

SECTION 2 – GANTRY SAFETY AWARENESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–1

2-1

EMERGENCY STOP SWITCH LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1-1 On the Gantry Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1-2 On the Gantry Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1-3 Emergency Stop From the Operators Console . . . . . . . . . . . . . . . . . . . . . . . . GANTRY MECHANICAL HAZARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2-1 Beware of Gantry Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2-2 Axial Drive Switch and Buzzer for Gantry Rotation . . . . . . . . . . . . . . . . . . . . 2-2-3 Reset from the OC for Gantry Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2-4 Preparation for Servicing the Gantry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GANTRY ELECTRICAL HAZARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OTHER GANTRY HAZARDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4-1 X–ray Radiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4-2 Thermal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4-3 Slip Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4-4 Laser Radiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–1 2–1 2–2 2–3 2–4 2–4 2–5 2–8 2–9 2–10 2–15 2–15 2–17 2–17 2–18

SECTION 3 – PDU SAFETY AWARENESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1

2-2

2-3 2-4

3-1

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1

SECTION 4 – EMERGENCY CONTROLS SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–1

4-1

SAFETY GUIDELINES

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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SECTION 1 – INTRODUCTION

1-1

GENERAL

This manual describes the safety precautions that must be realized when servicing the GANTRY and PDU as part of the CT system. These 2 subsystems pose unique potential hazards to the service person. This manual is not geared for detailed service training, but is written to emphasize awareness to the unique safety hazards facing the person who services this system. Danger, warning and caution statements are made throughout the manual with the symbols shown below. In addition, international symbols, shown on the next page, are also used. The definitions of the danger statement, warning statement, caution statement and international symbols are described as follows:

DANGER DANGER MEANS THAT THE SITUATION DESCRIBED WILL CAUSE DEATH OR INJURY TO YOU OR SOMEONE ELSE IF THE SAFETY INFORMATION IS NOT OBEYED.

WARNING WARNING MEANS THAT THE SITUATION DESCRIBED CAN CAUSE PERSONAL INJURY OR DEATH TO YOU OR SOMEONE ELSE IF THE SAFETY INFORMATION IS NOT OBEYED.

CAUTION Caution means that the situation described may cause personal injury to you or someone else if the safety information is not obeyed

NOTICE Notice means that the situation described can cause damage to the system hardware/software or test equipment if the safety information is not obeyed.

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GENERAL(continued)

International symbol warning of an ionizing radiation hazard.

International symbol warning of a mechanical hazard.

International symbol warning of an electrical hazard.

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2197417 LOCK OUT / TAG OUT

In the U.S., or other countries which have an ECPL (Energy Control and Power Lockout) law or similar law as ECPL; or any field engineers who work in sites where a power distribution box with a lockout capability is used, GE service personel must be trained in and use ECPL procedures. For systems powered from a power distribution box which has a lockout capability, lock out the system power at the main input (Power Distribution Box) prior to any component changes.

1-2

OVERVIEW

DANGER READ THIS MANUAL IN ITS ENTIRETY PRIOR TO SERVICING CT SYSTEM. FAILURE TO HEED THIS WARNING MAY RESULT IN EQUIPMENT DAMAGE, PERSONAL HARM, HARM TO OTHERS OR DEATH. This CT Gantry has continuous rotation design for its rotor (Slip–ring type). Therefore, do not service this CT system in the same way as an alternating rotating system (Non Slip–ring type) such as you did for CT 9000 series, Max series, Pace, and Sytec series, otherwise, you might: D injure or kill yourself. D injure or kill others. D destroy subsystems or the entire system. D destroy test equipment.

D Gantry Mechanical D Gantry Electrical D Other Gantry Hazards D PDU Electrical Note To reduce the risk from potential hazards, always use appropriate Lockout/Tagout procedures when servicing the system.

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OPERATOR CONSOLE HAZARD

The following warnings must be observed when servicing the Operator Console (OC).

WARNING ELECTRIC SHOCK AND BURN HAZARD! TURN OFF THE OC POWER SWITCH WHEN ACCESSING THE COMPONENTS OF THE OC. THIS TURNS OFF THE CONTACTOR WITHIN THE PDU, SO THAT AC115V LINE FOR THE OC IS DISCONNECTED. THEREFORE, ALL POWER CAN BE THOROUGHLY REMOVED FROM THE OC.

NOTICE Electrostatic discharge hazard. It is essential to link yourself to ground potential by wearing an anti–static wrist strap when accessing any circuit boards within the OC. No board should ever be accessed without this precaution.

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SECTION 2 – GANTRY SAFETY AWARENESS This section describes the safety precautions that must be realized when servicing the GANTRY. The following areas of potential hazards are discussed in this section: D Emergency Stop Switch Locations D Gantry Mechanical D Gantry Electrical D Other Gantry Hazards

2-1 2-1-1

EMERGENCY STOP SWITCH LOCATIONS On the Gantry Cover

There are the two Gantry emergency stop switches accessible when the Gantry covers are installed. Illustration 2–1

Emergency Stop Switch On the Cover EMERGENCY STOP SWITCHES

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2197417 On the Gantry Frame

There are four emergency stop switches accessible when the Gantry covers are removed. (See Illustration 2–2.) To connect (activate) the Emergency Stop Switches after removing the gantry cover, refer to: Functional Check/Adjustment, System, Checks during System Installation, EMERGENCY OFF TEST.

DANGER THE EMERGENCY STOP SWITCHES ON THE INSIDE OF THE GANTRY ARE NOT ACTIVE WHEN THE GANTRY COVERS ARE REMOVED UNLESS THEY ARE CONNECTED.

Illustration 2–2

Emergency Stop Switch On the Gantry Frame (with the cover removed)

FRONT VIEW

REAR VIEW

EMERGENCY STOP SWITCHES

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2197417 Emergency Stop From the Operators Console

To stop gantry rotation from the OC quickly during an emergency situation, press the OC Emergency Stop Switch as shown in Illustration 2–3.

DANGER DO NOT USE THE STOP SCAN SWITCH, LOCATED ON THE KEYBOARD, TO STOP GANTRY ROTATION DURING AN EMERGENCY SITUATION. PRESSING THIS SWITCH ONLY ABORTS THE SCAN AND THE GANTRY CONTINUES TO ROTATE. PRESS THE EMERGENCY STOP SWITCH (ILLUSTRATION 2–3) OR ONE OF THE GANTRY EMERGENCY STOP SWITCHES (ILLUSTRATION 2–1 OR 2–2) TO STOP GANTRY ROTATION.

Illustration 2–3

Emergency Stop Switch On the OC

EMERGENCY STOP SWITCH

STOP SCAN SWITCH (Do not use this button.)

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GANTRY MECHANICAL HAZARD

This section describes the potential hazards associated with gantry rotation. Your safety will be compromised if you do not understand the risks. Please read carefully.

2-2-1

Beware of Gantry Rotation

The Gantry rotates 360 degrees every second. Danger to personnel is highest in the areas on either side of the Gantry where objects can be ejected at great velocity when the Gantry is rotating (if the Gantry side covers are removed).

DANGER IMPACT HAZARD!! DURING SERVICING, AVOID THE AREA AT THE RIGHT OR LEFT SIDE OF THE GANTRY WHENEVER THE GANTRY IS ROTATING AND THE SIDE COVERS ARE REMOVED. ALSO AVOID THIS AS MUCH AS POSSIBLE WHEN THE GANTRY IS NOT ROTATING. FAILURE TO HEED THIS WARNING MAY RESULT IN PERSONAL HARM, HARM TO OTHERS, OR DEATH. Do not leave any board chassis opened during scanning, otherwise boards could be ejected at high speed and destroyed. In addition, always use procedures described in the service documentation when replacing components.

CAUTION Impact Hazard. All components in the Gantry must be secured adequately using the proper tools and all mounting hardware must be properly torqued to specification (if applicable). Mounting procedures described in the service documentation must be stringently followed. Failure to heed this caution may result in personal harm, harm to others.

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2197417 Axial Drive Switch and Buzzer for Gantry Rotation

WARNING MECHANICAL HAZARD! IF THE XG ERROR OCCURS, THE GANTRY WILL BE ROTATED SUDDENLY TO THE 180 DEGREE POSITION TO PREVENT LEAKING OF OIL FROM THE TUBE. WHEN SERVICING THE GANTRY WITH THE COVER(S) REMOVED, THE AXIAL DRIVE SWITCH (ROTATE) MUST BE TURNED OFF. FAILURE TO HEED THIS WARNING MAY RESULT IN PERSONAL HARM, HARM TO OTHERS OR DEATH.

Illustration 2–4 shows the location of the Axial Drive Switch (Rotate switch) to enable or disable the axial drive motor of the Gantry which is accessed at the gantry rear base. When All Gantry Covers are removed: On the condition that Axial Drive switch is ON, the Table/Tilt (Control) switch is ON, and the three service brackets are engaged (Illustration 2–5), the Axial Drive Enable Buzzer continues to sound. This means the Gantry can be rotated for scanning whenever you want. Turn the Axial Drive Switch OFF to prevent it from rotating. Consequently, the Axial Drive Enable Buzzer also stops sounding.

DANGER MECHANICAL HAZARD!! NEVER PUT ANY BODY PART INTO THE GANTRY WITHOUT DISABLING THE AXIAL DRIVE AND VERIFYING THAT IT IS DISABLED. THE AXIAL DRIVE ENABLE BUZZER MUST BE OFF. DO NOT SERVICE THE GANTRY IF THE BUZZER SOUNDS. FAILURE TO HEED THIS WARNING MAY RESULT IN PERSONAL HARM, HARM TO OTHERS OR DEATH.

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Axial Drive Switch and Buzzer for Gantry Rotation (Continued) Illustration 2–4

Axial Drive Switch

AXIAL DRIVE SWITCH

CONTROL SWITCH

Illustration 2–5 Front

Three Service Brackets Rear

1

2

Gantry Front Service Bracket

Gantry Rear Service Bracket

Bracket 3 Gantry Right Side Service Bracket

2

1 3

Screws

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Axial Drive Switch and Buzzer for Gantry Rotation (Continued)

When Only Right Maintenance Cover is removed: The Safety switch on the right side cover is OFF so that the Gantry rotation is disable. To rotate the Gantry, the Maintenance cover MUST be installed.

DANGER DEATH OR SEVERE INJURY! THE SAFETY SWITCH OF RIGHT SIDE COVER 4 MUST NOT BE ACTIVATED BY THE WAY OTHER THAN CLOSING THE RIGHT MAINTENANCE COVER (e.g. BY ATTACHING A PIECE OF TAPE). ONCE THIS SWITCH IS ACTIVATED, THE GANTRY MAY ROTATE AND POTENTIAL DANGER IS PRESENT IF RIGHT MAINTENANCE COVER REMAINS OPENED.

Illustration 2–6

Safety Switch for Right Maintenance Cover Rear

Front

4 Safety Switch

4

Right Maintenance Cover Right Side Cover

DANGER DEATH OR SEVERE INJURY! WHEN FRONT OR REAR COVER IS INSTALLED, THE RIGHT SIDE COVER MUST BE INSTALLED FIRST. IF THE FRONT AND REAR COVERS ARE INSTALLED WITH THE RIGHT SIDE COVER REMOVED, THE GANTRY CAN ROTATE WITH NO AXIAL DRIVE ENABLE BUZZER.

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2197417 Reset from the OC for Gantry Rotation

When activating the following switches in the OC, the reset signal is transmitted to the TGP board in the Gantry so that the Gantry will rotate. D Reset switch of the Host CPU Assy: Resets the CT whole system. D Power–OFF switch of the Host CPU Assy: Switches OFF only the OC. This mean that the other subsystem (Gantry, Table, PDU...) remains ON. D Reset button of the DBPCI board in the Nest chassis: Resets a part of the boards in the OC (Keyboard, DASIF, Audio...) and TGP board in the Gantry.

ÍÍÍÍ ÍÍÍÍ ÍÍÍÍ

OC Front View

With the front cover removed.

Connector Box

DBPCI Board

Nest

SCSI Bay

OC Rear View

Host CPU Assy

With the rear cover and inner back cover removed.

Reset

Host CPU Assy Reset

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2197417 Preparation for Servicing the Gantry

In addition to the warnings stated earlier, note the following prior to servicing the gantry: D Never work in the Gantry when the Axial drive enable buzzer sounds. D Never assume that the Gantry will not rotate. D If the side covers are removed, avoid standing at the right or left side of the gantry during gantry rotation. D Always lockout/tag the system power line disconnect after shutting off power to the Gantry. D Look at the position of the Axial Drive Switch (Illustration 2–4). Use this switch to stop the gantry and buzzer. This switch must be OFF to ensure that the gantry is safe for servicing. D Always hold the gantry with the Azimuth lock pin during service, otherwise the Gantry may unexpectedly rotate under unbalanced conditions which occur when components are removed, thus, causing gantry rotation.

WARNING MECHANICAL HAZARD! FAILURE TO HOLD THE GANTRY USING THE AZIMUTH LOCK PIN PRIOR TO REMOVING COMPONENTS MAY LEAD TO GANTRY MOTION WHICH CAN STRIKE A PERSON CAUSING INJURY OR DEATH. D Always remove jewelry (e.g. watches, rings, etc.), secure clothing and remove any clothing which could get caught in rotating components. D Always wear safety glasses. D Always secure the side covers, front cover, and rear covers of the Gantry and tube hoist rail before tilting the gantry. D Always announce when the Gantry is about to be enabled before enabling. D Always use the hardware mounting procedures defined in the service documentation. After servicing the Gantry, note the following: D Do not leave any tools in the Gantry. D Be sure that any covers on the Gantry rotating section are on and secured.

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GANTRY ELECTRICAL HAZARD

The PDU provides 400 VAC to the X–ray Generator subsystem via the slip ring in the Gantry. Illustration 2–7 shows the XG power (440VAC) control switch on the Gantry rear base. The switch is used to open the System Safety Loop; when this Loop is opened, the K1 contactor in the PDU is turned OFF, disabling the 400V AC supply. Illustration 2–7

XG Power Switch (400 VAC Able/Disable Switch)

XG POWER SWITCH

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GANTRY ELECTRICAL HAZARD (Continued)

DANGER ELECTROCUTION!! WHEN SERVICING ANY COMPONENTS OF THE XG GENERATOR, WAIT MORE THAN 5 MINUTES TO BE DISCHARGED AFTER THE CB1 AND CB5 IN THE PDU ARE TURNED OFF.

Illustration 2–8

CB5

CB1 and CB5 in the PDU1 (220XXXX / 224XXXX)

ÂÂÂÂÂÂÂ ÂÂÂÂÂÂÂ ÂÂÂÂÂÂÂ ÂÂÂÂÂÂÂ ÂÂÂÂÂÂÂ ÂÂÂÂÂÂÂ ÂÂÂÂÂÂÂ CB1

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GANTRY ELECTRICAL HAZARD (Continued) Illustration 2–9

CB1 and CB5 in the PDU2 (229XXXX)

PDU2 400V

PDU2 200V

CB1 CB1

CB5

CB5

CB1

CB5

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GANTRY ELECTRICAL HAZARD (Continued)

DANGER ELECTROCUTION!! WHEN SERVICING THE SLIP RING, THE CB1 AND CB5 IN THE PDU MUST BE TURNED OFF. (SEE ILLUSTRATION 2–8.)

DANGER ELECTROCUTION!! THE 400 VAC IS SUPPLIED DIRECTLY TO THE SLIP RINGS IN REFERENCE TO THE 200, 380, 400, 415, 440, 460, OR 480, 3 PHASE VAC INCOMING LINE. NEVER ENTER THE GANTRY INTERNAL AREA WITHOUT ENSURING THAT YOU HAVE DISABLED THE AXIAL DRIVE AND THE XG POWER SWITCH (400VAC SOURCE). TOUCHING ANY POINT AT 400VAC IS LIKELY TO RESULT IN ELECTROCUTION.

DANGER ELECTROCUTION!! TWO PEOPLE MUST ALWAYS BE PRESENT WHEN THE 400 VAC SUPPLY IS BEING MONITORED. WHILE ONE PERSON IS MAKING THE VOLTAGE MEASUREMENT, THE OTHER PERSON IS STANDING NEAR THE XG POWER SWITCH, READY TO FLIP THE SWITCH OFF IN THE EVENT OF AN EMERGENCY. FAILURE TO HEED THIS WARNING MAY RESULT IN PERSONAL INJURY OR ELECTROCUTION.

DANGER ELECTROCUTION!! THE 750VDC IS FLOATING INSIDE THE XG UNITS. IT TAKES MORE THAN 5 MINUTES TO BLEED OFF THE CAPACITORS IN THE XG UNITS AFTER XG POWER SWITCH AT THE GANTRY REAR BASE IS TURNED OFF.

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GANTRY ELECTRICAL HAZARD (Continued)

WARNING EXPLOSION HAZARD! LARGE FILTER CAPACITORS OF THE XG GENERATOR IN THE GANTRY COULD EXPLODE UNDER CERTAIN SITUATIONS. THEREFORE, BE SURE THAT ALL GENERATOR COVERS ARE IN PLACE AND THAT SAFETY GLASSES ARE WORN AT ALL TIMES. OTHERWISE, PERSONAL INJURY MAY OCCUR FROM FLYING DEBRIS SUBSEQUENT TO A CAPACITOR EXPLOSION.

In addition to the cautions and warnings in this GANTRY ELECTRICAL HAZARD section, follow the steps below prior to servicing the gantry: D Always lockout/tag the system power line disconnect after shutting off power to the gantry. Verify the absence of electrical power before attempting any disassembly. D Do not manually rotate the Gantry without knowing what you are touching. D Only use the methods of voltage measurements that are depicted in the service documentation. D Reinstall all covers where exposed voltages are accessible.

NOTICE Electrostatic discharge hazard. It is essential to link yourself to ground potential by wearing an anti–static wrist strap when accessing any circuit board within the Gantry. No board should ever be accessed without this precaution.

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OTHER GANTRY HAZARDS

Other areas of potential hazards and damage to hardware are listed below: D X–ray radiation D Thermal D Slip Ring

2-4-1

X–ray Radiation

Due to higher x–ray power, risk to the service person increases. The Gantry does not have an audible x–ray on indicator nor is it required by FDA. It does have visual indicators on the gantry display and on the rear cover of the gantry. See Illustration 2–10.

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X–ray Radiation (continued)

WARNING X–RAY EXPOSURE! X–RAY EXPOSURE IS HARMFUL TO HUMAN HEALTH! BE SURE THAT THE SCAN ROOM IS CLEAR OF ALL PERSONNEL PRIOR TO MAKING X–RAY EXPOSURES.

Illustration 2–10

X–RAY ON Light

X–RAY ON LIGHT

FRONT

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REAR

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2197417 Thermal

Due to the high heat output of the tube during x–ray exposure, the tube casing, cooling plumbing and radiator can become considerably hot.

WARNING BURN HAZARD! NEVER TOUCH THE X–RAY TUBE CASING, THE COOLING LINES, OR THE TUBE CASING RADIATOR UNTIL YOU KNOW THAT THEY ARE COOL. OTHERWISE, PERSONAL INJURY MAY OCCUR.

2-4-3

Slip Rings

DANGER ELECTROCUTION!! THERE IS A LIVE CURRENT RUNNING THROUGH THE GANTRY SLIP RING POWER BRUSHES. DO NOT SERVICE THE GANTRY SLIP RINGS UNLESS THE CB1 AND CB2 IN THE PDU HAVE BEEN TURNED OFF AND CHECKED.

NOTICE Do not touch the slip rings with bare fingers because skin oil damages them. The slip rings do not require periodic cleaning. If cleaning is required (in FMI, etc), only follow the cleaning procedure described in the documentation.

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2197417 Laser Radiation

CAUTION Damage to visual function!! Never look directly into the laser beam positioning lights. The laser beam can severely harm the eyes.

The Laser beam Positioning Lights might be equipped with some systems, which contains the Caution Labels on the Gantry cover and ring cover. Illustration 2–11

Laser Caution Labels

CAUTION LABEL ON THE GANTRY COVER

CAUTION LABEL ON THE LASER APERTURE (3 SHEETS ON THE GANTRY FRONT COVER, 2 SHEETS ON THE RING COVER)

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SECTION 3 – PDU SAFETY AWARENESS

3-1

GENERAL

Illustration 3–1 shows the different voltage levels in the PDU.

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GENERAL (continued) Illustration 3–1

PDU1 (220XXXX / 224XXXX) Voltage Levels (e.g. 400V system PDU)

SAFETY PROTECT COVER (Guard against shock hazard) RATING VOLTAGE SAFETY PROTECT COVER (Guard against shock hazard)

(480VAC – 115VAC)

RATING VOLTAGE (480VAC – 115VAC)

ÍÍ ÍÍ ÍÍ ÍÍ ÍÍ

ÍÍÍÍÍ ÍÍÍÍÍ ÍÍÍÍÍ ÍÍÍÍÍ

ÍÍÍÍÍ ÍÍÍÍÍ ÍÍÍÍÍ ÍÍÍÍÍ ÍÍÍÍÍ ÍÍÍÍÍ

SAFETY PROTECT COVER (Guard against shock hazard)

Note: For the 200V system PDU, two protect covers exists.

RATING VOLTAGE

SAFETY PROTECT COVER (Guard against shock hazard)

(115VAC)

RATING VOLTAGE (200VAC, 115VAC)

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GENERAL (continued) Illustration 3–2

PDU2 (229XXXX) Voltage Levels (e.g. 400V system PDU)

SAFETYPROTECT COVER (Guard against shock hazard ) RATING VOL TAGE (480VAC~1 15VAC)

Note: For the 200V system PDU, two protect cover exists

SAFETYPROTECT COVER (Guard against shock hazard) RATING VOL TAGE (480VAC~1 15VAC) SAFETYPROTECT COVER (Guard against shock hazard)

RATING VOL TAGE (220VAC)

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GENERAL (continued)

DANGER EXTREME CARE MUST BE EXERCISED TO SAFELY SERVICE THE PDU. MORE THAN 100 KW OF POWER IS AVAILABLE AT THE PDU FOR SHORT PERIODS OF TIME. THEREFORE, CONSIDER ALL POINTS WITHIN THE PDU TO BE ELECTRICALLY HAZARDOUS. DO NOT PERFORM ANY WORK IN THE PDU UNLESS IT IS DEENERGIZED. FAILURE TO HEED THIS WARNING MAY RESULT IN PERSONAL INJURY OR DEATH. In addition to the warning above, follow the steps below prior to servicing the PDU: D Connect voltage measuring equipment only when power is removed and the wall Power Distribution Box (PDB) is locked and tagged. D Always wear safety glasses. D Be sure that all safety protect covers are in place before the PDU is energized. See Illustration 3–1.

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GENERAL (continued)

WARNING ELECTROCUTION HAZARD! POWER IS SUPPLIED TO THE PDU TERMINAL (TB1) FROM THE HOSPITAL PDB (POWER DISTRIBUTION BOX). EVEN IF PDU POWER IS CUT OFF BY THE CB1 AND CB2 BREAKERS IN THE PDU OR OC POWER–ON SWITCH, THIS TERMINAL (TB1) ARE STILL LIVE.

Illustration 3–3

CB1, CB2 and TB1

PDU1 (220XXXX / 224XXXX) TB1

ÈÈ ÈÈ ÈÈ ÈÈÈÈ ÈÈ ÈÈ CB2 CB1

PDU2 200V (229XXXX)

ÈÈ ÈÈ È ÈÈ È CB1

SAFETY GUIDELINES

PDU2 400V (229XXXX)

TB1 TM2, TM5 CB2

CB2

ÈÈ ÈÈ ÈÈ ÈÈ ÈÈ ÈÈ

TB1 TM2, TM5

CB1

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SECTION 4 – EMERGENCY CONTROLS SUMMARY

4-1

GENERAL

This sections summarizes the type of emergency controls (Table 4–1) that are available to the service person and/or the customer, some of which were previously discussed. Take note in Table 4–1 that only the System Emergency Off Switch and the Primary Power Disconnect are the key emergency controls because these two switches remove all power to all components of the system. Whereas, the other emergency controls in Table 4–1 only effect part of the system.

DANGER BEFORE PERFORMING ANY SERVICING OF THE CT SYSTEMS, BE SURE YOU KNOW THE LOCATIONS OF THE SYSTEM EMERGENCY OFF SWITCH AND THE PRIMARY POWER DISCONNECT. BOTH ARE NORMALLY LOCATED NEAR THE GANTRY AND OC. FAILURE TO ACCESS THESE TWO CONTROLS CAN RESULT IN BODILY INJURY OR DEATH IN THE EVENT OF AN EMERGENCY.

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GENERAL (continued) Note The System Emergency OFF Switch and Primary Power Disconnect are the option kit (For GEMS– Am Only).

TABLE 4–1 EMERGENCY CONTROLS TYPE

AVAILABLE TO:

ILLUST. #

PURPOSE

SERVICE

CUSTOMER

CONSOLE EMERGENCY STOP SWITCH

YES

YES

2–3

DISABLES X–RAY DRIVES, GANTRY DRIVES, AND TABLE DRIVES.

SYSTEM EMERGENCY OFF SWITCH

YES

YES

–––

REMOVES ALL POWER TO ALL COMPONENTS.

PRIMARY POWER DISCONNECT

YES

YES

–––

REMOVES ALL POWER TO ALL COMPONENTS.

AXIAL DRIVE DISABLE SWITCH

YES

NO

2–4

DISABLES GANTRY ROTATION.

XG POWER (400VAC) DISABLE SWITCH

YES

NO

2–7

DISABLES XG AC MAIN POWER SUPPLY TO GANTRY.

EMERGENCY STOP SWITCHES ON GANTRY (COVERS INSTALLED)

YES

YES

2–1

DISABLES X–RAY DRIVES, GANTRY, DRIVES, AND TABLE DRIVES.

EMERGENCY STOP SWITCHES ON GANTRY (COVERS REMOVED)

YES

NO

2–2

DISABLES X–RAY DRIVES, GANTRY, DRIVES, AND TABLE DRIVES.

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EMC

TABLE OF CONTENTS SECTION

PAGE

SECTION 1 – EMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1-2 1-3

1-4 1-5

EMC

EMC PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NOTICE UPON INSTALLATION OF THE PRODUCT . . . . . . . . . . . . . . . . . . . . . . . . . . GENERAL NOTICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3-1 Designation of Peripheral Equipment Connectable to This Product . . . . . . 1-3-2 Notice against User Modification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3-3 Others . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . COUNTERMEASURES AGAINST EMC–RELATED ISSUES . . . . . . . . . . . . . . . . . . . 1-4-1 General Countermeasure Electromagnetic interference with other equipment NOTICE ON SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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SECTION 1 – EMC

1-1

EMC PERFORMANCE

This CT system may characteristically cause electromagnetic interference with other equipment, either through air or connecting cables. The term EMC (Electromagnetic Compatibility) indicates capability of the equipment, which curbs electromagnetic influence from other equipment and at the same time does not affect other equipment with similar electromagnetic radiation from itself. This product is designed to fully comply with the group 1,Class A of EN60601–1–2 (IEC60601–1–2), in EMC regulations.

Proper installation following this service manual is required in order to achieve the full EMC performance of this product. The product must be installed as stipulated in [1–2. Notice upon Installation of the Product]. In case of issues related to EMC, please follow procedures stated in [1–4. Countermeasures against EMC–Related Issues].

1-2

NOTICE UPON INSTALLATION OF THE PRODUCT

1.

Use either power supply cords provided by GEMS or ones designated by GEMS. Products equipped with power source plug should be plugged into the fixed power socket which has the protective grounding conductor. Connect a three–pole plug to a three–pole socket without using a three–pole–to–two–pole converter.

2.

Connect the permanent grounding equipment to the protective earth terminal of the place where the protective grounding conductor of the equipment is set up.

3.

Locate the equipment as far as possible from other electronic equipment.

4.

Be sure to use either any cables provided by GEMS or ones designated by GEMS. Wire these cables following these installation procedures. i.e. Wire power cables separately from signal cables.

5.

Lay out the main equipment and other peripherals following these installation procedures.

EMC

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GENERAL NOTICE

1-3-1

Designation of Peripheral Equipment Connectable to This Product

Use the optional peripheral equipment, as designated by GEMS, to satisfy EMC requirement. Avoid using other equipment than designated by GEMS. Failure to comply with this instruction may result in poor EMC performance of the product.

1-3-2

Notice against User Modification

Never modify this product. Unilateral User modification may cause degradation in EMC performance. Modification of the product includes; a. Changes in cable (length, material, wiring etc.). b. Changes in system installation / layout. c. Changes in system configuration / components. d. Changes in means of fixing system / parts (cover open / close, cover screwing).

1-3-3

Others

Operate the system with all covers closed. If you open any cover for some reason, be sure to shut it before starting / resuming operation. Operating the system with any cover open may affects EMC performance.

1-4

COUNTERMEASURES AGAINST EMC–RELATED ISSUES

Generally it is very difficult to grapple with issues related to EMC. It may take much time and cost.

1-4-1

General Countermeasure Electromagnetic interference with other equipment(s)

1.

Electromagnetic interference may be alleviated by positioning other equipment(s) far from the system.

2.

Electromagnetic interference may be mitigated by changing the relative location (installation angle) between the system and other equipment(s).

3.

Electromagnetic interference may be eased by changing wiring locations of power / signal cables of other equipment(s).

4.

Electromagnetic influence may be reduced by altering the path of power supply for other equipment(s).

1-5

NOTICE ON SERVICE

1.

Ensure that all screws are tight after servicing. Loose screws may cause the degradation in EMC performance.

2.

In case the RF gasket of this system is broken, replace it with a new one immediately.

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APPENDIX A – SYMBOLS AND CLASSIFICATION Symbol

Publication

Description

417–5032

Alternating Current

335–1

Three–phase Alternating Current

335–1

Three–phase Alternating Current with neutral conductor

3

3N

Direct Current

417–5019

Protective Earth (Ground)

348

Attention, consult ACCOMPANYING DOCUMENTS

417–5008

OFF (Power: disconnection from the mains)

417–5007

ON (Power: connection to the mains)

Warning, HIGH VOLTAGE

Emergency Stop

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Symbol

Publication

Description Type B

417–5339

X–ray Source Assembly Emitting

417–5009

Standby

Start

Table Set

Abort

Intercom

(on Operator Console) Power On: light on Standby: light off Warning sign : Radiation of Laser Apparatus

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Symbol

Description Microphone (Mic)

Contrast

Brightness

50_C

System storage prior to installation: Maintain storage temperature between –10° C and +50° C

–10_C System storage prior to installation: Maintain non–condensing storage humidity below 90% DO NOT store system longer than 90 days

Humidity 10–90% Excluding Condensation

Air Pressure 700–1060hPa

System storage and shipment: Maintain Air Pressure between 700 and 1060hPa

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CLASS 1 EQUIPMENT Any permanently installed equipment containing operator or patient accessible surfaces must provide backup protection against electric shock,in case the BASIC INSULATION fails. In addition to BASIC INSULATION,Class1 equipment contains a direct connection to a PROTECTIVE(EARTH) CONDUCTOR which prevents shocks when a person touches a broken piece of equipment or touches two different equipment surfaces simultaneously.

TYPE B EQUIPMENT CLASS I, II, or III EQUIPMENT or EQUIPMENT with INTERNAL ELECTRICAL POWER SOURCES provide an adequate degree of protection against electric shock arising from (allowable) LEAKAGE CURRENTS or a breakdown in the reliability of the protective earth connection.

ORDINARY EQUIPMENT Enclosed EQUIPMENT without protection against the ingress of water.

OPERATION 0f EQUIPMENT CONTINUOUS OPERATION WITH INTERMITTENT LOADING. Operation in which EQUIPMENT is connected continuously to the SUPPLY MAINS.The stated permissible loading time is so short that the long term on–load operating temperature is not attained.The ensuing interval in loading is, however, not sufficiently long for cooling down to the long term no–load operating temperature. EQUIPMENT not suitable for use in the presence of a FLAMMABLE ANESTHETIC MIXTURE WITH AIR or WITH OXYGEN or NITROUS OXIDE.

CLEANING The system is NOT WATERPROOF. It is NOT designed to protect internal components against the ingress of liquids.Clean external system surfaces(Gantry,table,consoles and accessories)with a soft cloth dipped in hot water and wrung DAMP/DRY. (NOT dripping!) IF NECESSARY, use only mild (dish washing liquid) soap to remove dirt.

NOTICE Avoid damage to equipment! Some ”spray and wipe”cleaners etch and permanently cloud clear plastic surfaces!! Use only warm water and mild liquid soap to clean surfaces.

A–4

GE Medical Systems: Telex 3797371 P.O. Box 414, Milwaukee, Wisconsin 53201 U.S.A. (Asia, Pacific, Latin America, North America) GE Medical Systems – Europe: Telex 698626 283, rue de la Miniére, B.P. 34, 78533 Buc Cedex, France