Repairing and maintaining watches, cameras, musical instruments, medical equipment, and other precision instruments requires a high level of skill and attention to detail. Some devices contain tiny gears that must be manufactured to within one one-hundredth of a millimeter of design specifications, and other devices contain sophisticated electronic controls. Job descriptions vary greatly, depending on the type of instrument being repaired.
Camera and photographic equipment repairers fix broken cameras and other optical devices. The repairer must first determine whether a repair should be attempted, because many inexpensive cameras cost more to repair than to replace. The most complicated or expensive repairs are usually referred back to the manufacturer or to a large repair center. If the repairer decides to proceed with the job, the problem must be diagnosed, often by disassembling numerous small parts in order to reach the source. The defective parts are then replaced or repaired. Many problems are caused by the electronic circuits used in cameras, and fixing these circuits requires an understanding of electronics. Camera repairers also maintain cameras by removing and replacing broken or worn parts and cleaning and lubricating gears and springs. Because many of the components involved are extremely small, repairers must have a great deal of manual dexterity. Frequently, older camera parts are no longer available, requiring repairers to build replacement parts or to strip junked cameras. When machining new parts, workers often use a small lathe, a grinding wheel, and other metalworking tools.
Repairs on digital cameras are similar to those on conventional cameras, but because digital cameras have no film to wind, they have fewer moving parts. Digital cameras rely on software, so any repair to the lens requires that it be calibrated with the use of software and by connecting the camera to a personal computer. Because digital cameras are generally more expensive and more widely used than film cameras, they are quickly becoming the most important source of business for camera repairers.
Watch and clock repairers work almost exclusively on expensive and antique timepieces, because moderately priced timepieces are cheaper to replace than to repair. Electrically powered clocks and quartz watches and clocks function with almost no moving parts, limiting necessary maintenance to replacing the battery. Many expensive timepieces still employ old-style mechanical movements and a manual or automatic winding mechanism. This type of timepiece must be regularly adjusted and maintained. Repair and maintenance work on a mechanical timepiece requires using hand tools to disassemble many fine gears and components. Each part is inspected for signs of wear. Some gears or springs may need to be replaced or machined. Exterior portions of the watch may require polishing and buffing. Specialized machines are used to clean all of the parts with ultrasonic waves and a series of baths in cleaning agents. Reassembling a watch often requires lubricating key parts.
As with older cameras, replacement parts are frequently unavailable for antique watches or clocks. In such cases, watch repairers must machine their own parts. They employ small lathes and other machines in creating tiny parts.
Musical instrument repairers and tuners combine their love of music with a highly skilled craft. These artisans, often referred to as technicians, work in four specialties: Band instruments, pianos and organs, orchestral string instruments, and guitars.
Band instrument repairers, brass and wind instrument repairers, and percussion instrument repairers focus on woodwind, brass, reed, and percussion instruments damaged through deterioration or by accident. In most cases, the problem with the instrument will be clear, but in some cases the repairers must diagnose the issue. They may unscrew and remove rod pins, keys, worn cork pads, and pistons and remove soldered parts by means of gas torches. Using filling techniques or a mallet, they repair dents in metal and wood. They also use gas torches, grinding wheels, lathes, shears, mallets, and small hand tools and, are skilled in metalworking and woodworking.
Violin and guitar repairers adjust and repair stringed instruments. Some repairers work on both stringed and band instruments. Initially, repairers play and inspect the instrument to find any defects. They replace or repair cracked or broken sections and damaged parts. They also restring the instruments and repair damage to their finish. Because the specifications of all types of instruments vary greatly, custom parts machining is considered an essential skill.
Piano tuners and repairers use different techniques, skills, and tools. Most workers in this group are tuners; only a few workers in this occupation specialize in refurbishing older pianos. Tuning involves tightening and loosening different strings to achieve the proper tone or pitch. Pitch matching is usually done by ear—an experienced tuner can compare the sound of a pitch with a tuning fork, and then with other pitches on the piano to make sure it is tuned properly. Tuners must make house calls, as piano tuning is sensitive to movement and most pianos cannot be transported easily. Some repairers specialize in restoring older pianos. Restoration is complicated work, often involving replacing many of the parts, which number more than 12,000 in some pianos. With proper maintenance and restoration, pianos often survive more than 100 years.
Pipe organ repairers do work similar to that of piano repairers, but with organ pipes rather than piano strings. Tuning pipe organs is very complicated, as most organs have thousands of pipes, and different pipes are tuned in different ways. Additionally, many repairers assemble new organs or expand organs with new ranks of pipes. Even with repairers working in teams or with assistants, organ maintenance can take several weeks or even months, depending upon the size of the organ.
Medical equipment repairers, also known as biomedical equipment technicians, maintain, adjust, calibrate, and repair electronic, electromechanical, and hydraulic equipment used in hospitals and other medical environments. They use various tools, including multimeters, specialized software, and computers designed to communicate with specific pieces of hardware. These repairers use hand tools, soldering irons, and other electronic tools to repair and adjust equipment. Among the tools they use is equipment designed to simulate water or air pressure. Faulty circuit boards and other parts are normally removed and replaced. Medical equipment repairers must maintain careful, detailed logs of all maintenance and repair that they perform on each piece of equipment.
Medical equipment repairers work on medical equipment such as defibrillators, heart monitors, medical imaging equipment (x-rays, CAT scanners, and ultrasound equipment), voice-controlled operating tables, and electric wheelchairs. Because most equipment repairs take place within a hospital, medical equipment repairers must be comfortable working around patients. In some cases, repairs may take place while equipment is being used. When this is the case, the repairer must take great care to make sure that repairs do not disturb the patient.
Other precision instrument and equipment repairers service, repair, and replace a wide range of equipment associated with automated or instrument-controlled manufacturing processes. For most of these repairers, the emphasis is on determining the problem and how to best approach the solution. In many cases, replacement is preferable to repair, since precision parts are often very sensitive and may cost more to repair than replace. Replacement parts are not always available, so repairers sometimes machine or fabricate new parts. Repairers may also be responsible for preventive maintenance and calibration, which involves regular lubrication, cleaning, and adjustment of many measuring devices. Increasingly, it also involves solving computer software problems as more control devices, such as valves, are controlled by software. To adjust a control device, a technician may need to connect a laptop computer to the control device's computer and make adjustments through changes to the software commands.
Work environment. Camera, watch, and musical instrument repairers work under fairly similar solitary, low-stress conditions with minimal supervision. A quiet, well-lit workshop or repair shop is typical. Piano and organ tuners must travel to the instruments being repaired. Often, these workers can adjust their schedules, allowing for second jobs as needed. Musical instrument repairer jobs are attractive to many professional musicians and retirees because the flexible hours common to repair work allow these individuals time for other pursuits.
Medical equipment and other precision instrument and equipment repairers normally work daytime hours, but are often expected to be on call. Still, like other hospital and factory employees, some repairers work irregular hours. Medical equipment repairers must work in a patient environment, which has the potential to expose them to diseases and other health risks, but occupational injuries are relatively uncommon.
Precision instrument repairers work under a wide array of conditions, from hot, dirty, noisy factories, to air-conditioned workshops, to the outdoors on fieldwork. Attention to safety is essential, as the work sometimes involves dangerous machinery, toxic chemicals, or radiation. Due to the individualized nature of the work, supervision is fairly minimal.
| 1. | Calibrate and verify accuracy of light meters, shutter diaphragm operation, and lens carriers, using timing instruments. |
| 2. | Disassemble equipment to gain access to defect, using hand tools. |
| 3. | Adjust cameras, photographic mechanisms, and equipment, such as range and view finders, shutters, light meters, and lens systems, using hand tools. |
| 4. | Clean and lubricate cameras and polish camera lenses, using cleaning materials and work aids. |
| 5. | Measure parts to verify specified dimensions/settings, such as camera shutter speed and light meter reading accuracy, using measuring instruments. |
| 6. | Test equipment performance, focus of lens system, alignment of diaphragm, lens mounts, and film transport, using precision gauges. |
| 7. | Examine cameras, equipment, processed film, and laboratory reports to diagnose malfunction, using work aids and specifications. |
| 8. | Requisition parts and materials. |
| 9. | Read and interpret engineering drawings, diagrams, instructions, and specifications to determine needed repairs, fabrication method and operation sequence. |
| 10. | Fabricate or modify defective electronic, electrical, and mechanical components, using bench lathe, milling machine, shaper, grinder, and precision hand tools according to specifications. |
| 11. | Assemble aircraft cameras, still and motion picture cameras, photographic equipment, and frames, using diagrams, blueprints, bench machines, hand tools, and power tools. |
| 12. | Install film in aircraft camera and electrical assemblies and wiring in camera housing, following blueprints, using hand tools and soldering equipment. |
| 13. | Record test data and document fabrication techniques on reports. |
| 14. | Lay out reference points and dimensions on parts and metal stock to be machined, using precision measuring instruments. |
| 15. | Recommend design changes or upgrades of micro-filming, film-developing, and photographic equipment. |
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