Contents

Safety Information ..... 2
Electrostatic Discharge Sensitive (ESDS) ..... 2
Specifications ..... 3-6
Theory of Operation ..... 7-11
Disassembly/Assembly Procedures ..... 12-13
Figure 1. APC PCB, ESD Solder Points ..... 12
Test Procedures ..... 14-17
Figure 2. AM Test Setup ..... 15
Part List Notes ..... 18
Main Assembly Part List ..... 19
Figure 3. System Exploded View ..... 20
Electrical Part List ..... 21-36
Packaging Part List ..... 37
Figure 4. Packaging View ..... 37
Abbreviated Operating Instructions ..... 38
Figure 5. Keyboard Schematic Diagram ..... 39

Manual Overview

The BWR/CD was originally manufactured with PCB 193325, PCB assembly 193321-1. Later version units were manufactured with PCB 252178, PCB assembly 252441-1. Service information for both versions is included in this manual.

Product Image

CAUTION: THE BOSE $ ^{\circledR} $ WAVE $ ^{\circledR} $ RADIO/CD CONTAINS NO USER SERVICEABLE PARTS. TO PREVENT WARRANTY INFRACTIONS, REFER SERVICING TO WARRANTY SERVICE STATIONS OR FACTORY SERVICE.

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.

WARRANTY INFORMATION

The Bose wave radio/CD is covered by a limited 1-year transferable warranty

SAFETY INFORMATION

1. Parts that have special safety characteristics are identified by the $ \triangleleft $ symbol on schematics or by special notes in the part lists. 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) 1492 (71). With the unit AC switch first in the ON position and then in 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, screwhead, 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 milliamph. 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 jumped 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 Meg ohms. 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 rechecked before it is returned to the customer.

ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) DEVICE HANDLING

This unit contains ESDS devices. We recommend the following precautions when repairing, replacing or transporting ESDS devices:

• Perform work at an electrically grounded work station.

• Wear wrist straps that connect to the station or heel straps that connect to conductive floor mats.

• Avoid touching the leads or contacts of ESDS devices or PC boards even if properly grounded. Handle boards by the edges only.

• Transport or store ESDS devices in ESD protective bags, bins, or totes. Do not insert unprotected devices into materials such as plastic, polystyrene foam, clear plastic bags, bubble wrap or plastic trays.

SPECIFICATIONS

Physical Description

Dimensions: 14" W x 8.5" D x 4.375" H (35.6 x 21.6 x 11.1) cm

Weight: 7.4 lb (3.4 kg)

Enclosure: Injection molded thermal plastic

Power Specifications

Input Line Voltage: 120V, 60 Hz, 50W

Power Consumption: $ \leq $ 8 W with unit switched off

$ \leq $ 50 W with CD player on, maximum output

CD Specifications

Tuner Specifications

FM

FM Antenna: 75 Ohm external antenna connection, line cord functions as an FM antenna

Tuning range: US: 87.7 MHz-107.9 MHz

Euro: 87.7 MHz-108.0 MHz

Japan: 76.0 MHz-90.0 MHz

De-emphasis: US: 75 sec.

E