Pace XR 3000 Bedienungsanleitung

XR 3000 Real-Time

X-Ray Inspection System

Operation Manual

Rev A, 4/2002BMS

P/N 5050-0511

PACE USA PACE Europe

9893 Brewers Court Sherbourne House,

Laurel, MD 20723 Sherbourne Drive

USA Tilbrook, Milton Keynes

MK7 8HX

United Kingdom

Tel: (301) 490-9860 Tel: (44) 1908 277666

Fax: (301) 604-8782 Fax: (44) 1908 277777

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1. XR 3000 Safety Information

IMPORTANT: READ THIS FIRST

It is essential that the operator of the XR 3000 read and understand the following

safety warnings PRIOR tooperation.

The XR 3000 is designed to provide safe and efficient operation. However, any

equipment producing ionizing radiation (x-rays) must be considered hazardous

and should be treated accordingly. When operating this equipment, observe the

following:

?? PACE strongly recommends that all maintenance be performed by a

qualified service technician.

?? The XR 3000 x-ray tube produces high voltages of up to 70,000 volts.

Under no circumstances should the case be disassembled or modified as

severe electrical shock may occur.

?? The XR 3000 is designed to ensure adequate radiation shielding. Even

so, always be aware that the ionizing radiation (x-rays) can constitute a

distinct hazard if not employed in strict accordance with instructions

provided in this manual for maximum operator safety.

?? Exposure to excessive quantities of radiation can be dangerous to your

health. Avoid not only direct radiation exposure, but also to secondary or

scattered radiation which occurs when an x-ray beam strikes or has

passed through any material.

?? Do not insert any part of the body into the inspection chamber while x-rays

are on. Although the XR 3000 operates at an extremely low x-ray dose,

unnecessary radiation exposure should be avoided. If an item becomes

jammed or lodged in the inspection area, the XR 3000 should be turned

off before any attempt is made to clear the inspection chamber.

?? PACE strongly recommends that all personnel operating the XR 3000

wear a radiation film dosimeter badge. See Section 15. This badge

records an exposure history for the operator and acts as a constant

reminder to the operator to use caution and safe work practices when

operating the XR 3000.

?? The radiation exposure dosage received by personnel working with x-ray

inspection equipment should not exceed those limits set by local

regulations relating to ionizing radiation.

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?? Adequate warning signs and symbols should be displayed in the vicinity of

the XR 3000 warning of possible x-ray exposure. Any warning lamps and

signals should be checked prior to operating the XR 3000.

?? The electrical circuits of the XR 3000, although enclosed for operator

protection, must be considered as a potential hazard. Strict observance of

safety practices pertaining to operation and maintenance is essential.

Proper electrical grounding must always be used.

?? Before operating the XR 3000, all personnel designated or authorized to

operate the unit, as well as those supervising its operation, should have a

full understanding of how it works. Additionally, they should be familiar

with established radiation safety exposure practices sanctioned by the

National Bureau of Standards Handbook, “X-ray Protection” HB93,

pertaining to x-ray protection.

?? Service personnel should read this manual and be familiar with its

contents before attempting to adjust or repair this equipment.

2. Radiation Safety Information

Federal, State and Local Radiation Regulations (US ONLY)

This cabinet x-ray system was designed to conform to U.S. and Food and

Drug Administration (FDA) requirements as stated in the Code of Federal

Regulations, Title 21 (21CFR). These requirements (often referred to as the

CDRH or BRH regulations) govern the design and manufacture of all

equipment that produces ionizing radiation. Such equipment includes

television sets and microwave ovens, as well as cabinet x-ray systems. In

fact, the maximum allowable radiation emission for cabinet x-ray systems is

the same as that set for television sets and microwave ovens. Therefore,

respect to radiation emission, a properly maintained and operated cabinet x-

ray system is a safe as a television or microwave oven.

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Warning: Failure to adhere to the following warnings may result in

exposure to radiation:

?? Do not operate the x-ray system unless all system components and

features are in good repair.

?? Never attempt to remove any system component or bypass any

system function.

Several features are included in the system design to provide for radiation

safety. The controls (including key switches), control circuitry, leaded

components (including the leaded acrylic windows), physical barriers,

interlocks, and status and warning indicators each contribute to overall

radiation safety.

The Federal Aviation Administration (FAA), Occupational Safety and Health

Administration (OSHA), most state and some local government agencies

typically have specific standards regarding operational safety and constraints

regarding the modification of x-ray systems conforming to 21CFR (mentioned

above).

Typically, an x-ray system must be registered with the appropriate state

agency, by the physical possessor of the system, regardless of the legal

owner. Frequently, registration must occur prior to the x-ray system being

placed into service. Regulations may require initial and periodic inspections by

a government agency or a qualified vendor. In addition, the regulations may

require the implementation of standardized operating procedures, specialized

training, the distribution and use of exposure monitoring badges and posting of

radiation exposure warnings and other special notices. Radiation safety

requirements may differ slightly from one jurisdiction to another. It is the

users responsibility to ensure that the x-ray system is installed and

operated in compliance with all applicable governmental regulations.

Failure to comply may result in substantial penalties.

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3. Radiation Safety Guidelines

To ensure the health and safety of the operator and all others in the vicinity of

operating x-ray inspection equipment, the following guidelines are recommended

for establishing a basic radiation safety program.

Note: Federal, State, and some local government agencies

may have more stringent regulations concerning the operation

and use of equipment that produces ionizing radiation (x-rays).

The requirements of these governing agencies supersede the

recommendations made by the manufacturer.

1. A copy of the operating instructions should be kept at the machine at

all times.

2. Personnel operating the equipment should be trained in the proper and

safe operation of the machine.

3. Radiation surveys should be performed periodically to ensure that the

amount of radiation being emitted by the machine is less than

0.5mR/hour. We recommend performing a radiation survey:

?? Following initial installation –before placing the x-ray system

into service.

?? Whenever the x-ray system is relocated.

?? Whenever the x-ray system receives a strong jolt (e.g., being

dropped ore than one inch or struck sufficiently hard to dent or

deform the exterior cabinet).

?? Whenever a leaded component (such as the x-ray generator,

shielding, inspection tunnel curtains, LXDA or collimator cover)

is removed for any reason or period of time.

?? Annually –from the date of the most recent radiation survey

4. All controls and indicators should be checked daily to ensure proper

operation.

5. Do not operate the x-ray system if it is not in good repair. Do not

attempt to remove or bypass any controls (e.g. foot pedals and key-

switches), interlocks, status indicators, leaded components (including

the inspection tunnel curtains) or physical barriers. In the event of

failure or breakage, these items should only be replaced by a qualified

service technician using factory-approved parts.

6. Service of the equipment should only be performed by or under the

instruction of trained PACE personnel.

Page 6of 23

Many users choose to issue periodic radiation film badges to assure employees

that they are not being exposed to significant levels of radiation and to provide

added assurance that radiation emissions are well within regulatory limits.

4. Radiation Safety Training

PACE can provide or make referrals to those who can, operation and radiation

safety training to ensure that the facility is in compliance with all state and federal

radiation regulations.

Page 7of 23

5. Operation

Bare Board

Hole/Pad Offset

BGA Voiding

Leaded Component

Non-Co planarity

Leaded Component

Opens

XR 3000

The XR 3000 Real Time Inspection System is a powerful

tool in the quality control and process verification of all

aspects of microelectronics manufacturing. The XR 3000

provides rapid, real-time x-ray inspection for production

and rework environments. Its self-contained console

design supports easy customizing for numerous

applications, including multi-layer PCBs, small hole

drilling, large back-planes and assemblies with advanced

components, such as BGAs, ?BGAs and chip-scale

packages.

In bare board applications, it can be used to check for

interlayer shift and drilled hole-to-pad offset. Inspection is

performed following lamination, to determine the

presence and degree of interlayer shifts. At the onset of

either conventional or small hole drilling, inspection is

used to qualify hole-to-pad alignment. In addition to

enhancing product quality, x-ray inspection enables users

to control costs by eliminating defective boards early in

the production process. It can also be used to quality

control incoming boards from vendors or customers so

that defects can be detected before problems occur.

For surface mount components, it is used to verify

lead/pad co planarity, shorts, opens, and solder bond

quality. It can be used to check resistors and capacitors

as well as IC’s for internal damage and verify adjustments

throughout the placement and reflow processes.

For BGA’s, the XR 3000 can be used to check for all

potential defects including: shorts, opens, mis-

registration, non-wetting, solder ball voids, and

delamination. X-ray is used to verify proper reflow

profiles for advanced packages, and to control rework

process.

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6. Set Up

A. XR 3000 as a stand-alone inspection station

Place the XR 3000 on a stable work platform of sufficient capacity to

adequately support the XR 3000. The monitor used to view the images

should be placed on the work surface next to the XR 3000 and not on top of

the XR 3000 as it is not designed to support a monitor and the monitor may

fall.

Locate the foot pedal, composite video cable, and power cord. These should

be connected as shown in Figure 1.

Figure 1. The back of the XR 3000

The other end of the composite video cable should be connected to the

composite video input on the video monitor. The power cord should be

connected to a properly grounded 120 VAC power supply.

B. XR 3000 used with the TF 2000 or TF3000 BGA/CSP Rework Center

Place the XR 3000 on a stable work platform of sufficient capacity to

adequately support the XR 3000. The work platform can be the same as the

work platform supporting the TF 2000/TF3000 or may be a separate one as

long as it is close enough to allow for the connection of the composite video

cable to the PC.

Locate the foot pedal, composite video cable, and power cord. These should

be connected as shown in Figure 1.

The other end of the composite video cable should be connected to the

composite video input onthe video capture card on the PC. See Figure 2.

Page 9of 23

The power cord should be connected to a properly grounded 120 VAC power

supply.

Composite Video Connection

Figure 2: Back of TF 2000 PC or TF3000.

Page 10of 23

7. XR 3000 Initial Power-up and Operational Test

The system should be fully set up according to the System Setup Section before

starting these procedures.

1. To turn on the power, turn the key to the ON position. The key is required

to turn on the power and cannot be removed unless the key has been

returned to the off position. The green system light should also turn on

when the key is engaged.

2. Make sure that there is nothing inside the inspection chamber and

depress and hold the foot pedal. The image on the PC or video monitor

should change from a flat light gray image to a brighter, slightly grainy

image. This is the blank x-ray image.

3. Release the foot pedal and the image should return to its original state.

4. Depress the foot pedal again and now look at the control panel. The red

“x-ray on” light should illuminate and remain on for as long as you hold

down the foot switch. Release the foot pedal.

5. Place a component (such as a circuit board) inside the inspection

chamber directly underneath the x-ray tube.

6. Depress and hold the foot switch. The x-ray image of the component

should now be visible.

7. Move the component while the foot switch is depressed. The image

should move with the component. The image will display a trail behind the

component, which will disappear when the component has stopped

moving. This is a normal occurrence and is a function of the image

processor. The video processor included with this system is preset to 8

frame averaging. Averaging makes the x-ray image less grainy and can

be adjusted to improve image quality but with an increase in motion lag.

Refer to the section on the image processor for further information.

8. Images may be captured electronically when the XR 3000 is used with the

TF 2000 PC or TF3000 PC and software.

Your system is now ready for use. Please refer to the individual component

sections found later in this manual for further adjustment.

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