Bose 3-2-1 Manuel de dépannage - Page 2

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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

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

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

6500 / IEC 60056 paragraph 9.1.1. With the unit AC switch first in the ON position and then in

OFF position, measure from a known earth ground (metal waterpipe, conduit, etc.) to all ex-

posed metal parts of the unit (antennas, handle bracket, metal cabinet, screwheads, metallic

overlays, control shafts, etc.), especially any exposed metal parts that offer an electrical return

path to the chassis. Any current 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 POTENTIAL SHOCK HAZARD THAT MUST BE

ELIMINATED BEFORE RETURNING THE UNIT TO THE CUSTOMER.

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 prod-

ucts, 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.

CAUTION: The Bose

contains no user-serviceable parts. To prevent warranty infractions,

refer servicing to warranty service stations or factory service.

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF

BOSE CORPORATION WHICH IS BEING FURNISHED ONLY FOR

THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT

BY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF

THE BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR

USED FOR ANY OTHER PURPOSE.

SAFETY INFORMATION

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1 Series II Home Entertainment System

PROPRIETARY INFORMATION

symbol on schematics