Bose 402 c 802 c manual
This is the 68 pages manual for bose 402 c 802 c manual.
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Extracted text from bose 402 c 802 c manual (Ocr-read)
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1 PROPRIETARY INFORMATION 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. Contents Safety Information ............................................................................................................................. 2 Electrostatic Discharge Sensitive (ESDS) Device Handling .......................................................... 3 Theory of Operation ...................................................................................................................... 5-8 Figure 1. Block Diagram ....................................................................................................................8 Disassembly/Assembly Procedures .......................................................................................... 9-11 Test Setup Procedure ..................................................................................................................... 12 402 ® Test Procedures ................................................................................................................ 13-15 802® Test Procedures ................................................................................................................ 16-18 Part List Notes ................................................................................................................................. 19 Figure 2. 402, 802 II Original Version Exploded View .....................................................................20 Figure 3. 402, 802 II Current Version Exploded View ......................................................................20 Main Part List ............................................................................................................................. 21-22 402 Electrical Part List .............................................................................................................. 23-28 802 Electrical Part List ..........................................................................................................29-35 402 Electrical Part List ..........................................................................................................36-42 802 Electrical Part List ......................................................................................................... 43-48 402 and 802 Electrical Part List ............................................................................................ 49-50 Packaging Part List ......................................................................................................................... 51 Figure 4. Packaging Exploded View ................................................................................................51 Frequency Response Curves ................................................................................................... 52-64
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2 1. Parts that have special safety characteristics are identified by the symbol on schematics or by special notes on the parts list. Use only replacement par ts 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. Refer to Par agraph 84 of UL 1270. 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) 1492 (71). With the unit AC switch first in the ON position, then in the OFF position, measure from a known earth ground (metal water pipe, conduit, etc.) to all exposed 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 HAZ- ARD 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 be- tween the jumpered AC plug and each exposed metallic cabinet part on the unit. When the exposed metallic part has a return path to the chassis, the reading should be between 1 and 5.2 Megohms. When there is no return path to the chassis, the reading must be infinite. If it is not within the limits specified, there is the possibility of a shock hazard, and the unit must be repaired and re- checked before it is returned to the customer. SAFETY INFORMATION