Bose Computer MusicMonitor 서비스 매뉴얼 - 페이지 3

{카테고리_이름} Bose Computer MusicMonitor에 대한 서비스 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Bose Computer MusicMonitor 9 페이지. Owner's guide
Bose Computer MusicMonitor에 대해서도 마찬가지입니다: 소유자 매뉴얼 (16 페이지), 소유자 매뉴얼 (25 페이지)

페이지 인쇄

1. Parts that have special safety characteristics are identified by the

or by special notes on the parts list. Use only replacement parts that have critical characteristics

recommended by the manufacturer.

2. Make leakage current or resistance measurements to determine that exposed parts are

acceptably insulated from the supply circuit before returning the unit to the customer.

Use the following checks to perform these measurements:

A. Leakage Current Hot Check-With the unit completely reassembled, plug the AC line cord

directly into a 120V AC outlet. (Do not use an isolation transformer during this test.) Use a leak-

age current tester or a metering system that complies with American National Standards Institute

(ANSI) C101.1 "Leakage Current for Appliances" and Underwriters Laboratories (UL) UL6500 /

UL60065 / IEC 60065 paragraph 9.1.1. With the unit powered on, measure from a known earth

ground (metal water pipe, conduit, etc.) to all exposed metal parts of the unit (antennas, handle

bracket, metal cabinet, screw heads, metallic overlays, control shafts, etc.), especially any

exposed metal parts that offer an electrical return path to the chassis. Any cur-rent measured

must not exceed 0.5 milliamp. Reverse the unit power cord plug in the outlet and repeat test.

ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTEN-

TIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE UNIT TO THE

B. Insulation Resistance Test Cold Check-(1) Unplug the power supply and connect a jumper

wire between the two prongs of the plug. (2) Turn on the power switch of the unit. (3) Measure

the resistance with an ohmmeter between the jumpered AC plug and each exposed metallic

cabinet part on the unit. When testing 3 wire products, the resistance measured to the product

enclosure should be between 2 and infinite MOhms. Also, the resistance measured to exposed

input/output connectors should be between 4 and infinite MOhms. When testing 2 wire products,

the resistance measured to exposed input/output connectors should be between 4 and infinite

MOhms. If it is not within the limits specified, there is the possibility of a shock hazard, and the

unit must be repaired and rechecked before it is returned to the customer.

1. This part is not normally available from Customer Service. Approval from the Field Service

Manager is required before ordering.

2. The individual parts located on the PCBs are listed in the Electrical Part List.

This part is critical for safety purposes. Failure to use a substitute replacement with the

same safety characteristics as the recommended replacement part might create shock, fire

and/or other hazards.

4. This part is referenced for informational purposes only. It is not stocked as a repair part. Refer

to the next higher assembly for a replacement part.

SAFETY INFORMATION

CUSTOMER.

PART LIST NOTES

symbol on schematics