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1、Bose Wave Radio/CD 100V/120V/230V/240V PCB193325 and 252178 Service Manual Part Number 250443 REV. 05 Click here to go to the table of Contents RadioFans.CN 1 CAUTION: THE BOSE WAVE RADIO/CD CONTAINS NO USER SERVICE- ABLE PARTS. TO PREVENT WARRANTY INFRACTIONS, REFER SERVIC- ING TO WARRANTY SERVICE
2、STATIONS OR FACTORY SERVICE. WARRANTY INFORMATION The Bose wave radio/CD is covered by a limited 1-year transferable warranty 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. S
3、ervice information for both versions is included in this manual. 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. A
4、M 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 Click here for a BWR/CD product Image RadioF
5、ans.CN 2 1. Parts that have special safety characteristics are identified by the symbol on schematics or by special notes in the part lists. Use only replacement parts that have critical characteristics recom- mended by the manufacturer. 2. Make leakage current or resistance measurements to determin
6、e that exposed parts are accept- ably 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
7、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
8、 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
9、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 R
10、esistance 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 resis- tance with an ohmmeter between the jumped AC plug and each exposed metallic cabinet part on the unit. When the exposed
11、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 reche
12、cked before it is returned to the customer. SAFETY INFORMATION ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) DEVICE HANDLING This unit contains ESDS devices. We recommend the following precautions when repairing, replac- ing or transporting ESDS devices: Perform work at an electrically grounded work stat
13、ion. 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 tote
14、s. Do not insert unprotected devices into materials such as plastic, polystyrene foam, clear plastic bags, bubble wrap or plastic trays. RadioFans.CN 3 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 ther
15、mal plastic Power Specifications Input Line Voltage:120V, 60 Hz, 50W Power Consumption:? 8 W with unit switched off ? 50 W with CD player on, maximum output CD Specifications NominalLimitConditions Maximum output level2.0 V2.0 dB0 dB THD + noise.03%.08%1 kHz, -6 dB Signal to Noise Ratio95 dB90 dBA-w
16、eighted Channel reparation80 dB70 dB1 kHz Frequency response.5 dB1.0 dB20 Hz-15 kHz Low-level linearity error5.0 dB10.0 dB-90 dB De-emphasis5 kHz 16 kHz -4.53 dB -9.04 dB 2.0 dB 2.0 dB Dynamic range95 dB90 dB1 kHz, -60 dB, IEC-A, 20 kHz, LPF Defect tracking (interruption)1.0 mm.8 mmABEX test disc TC
17、D-725R Defect tracking (black dot)1.0 mm.8 mmABEX test disc TCD-725R Defect tracking (scratch)1.6 mm1.0 mmABEX test disc TCD-721R Defect tracking (finger print)75 m65 mABEX test disc TCD-725R Defect tracking (warped disc)1.0 mm.7 mmABEX test disc TCD-732RA Defect tracking (eccentric disc)280 m210 mA
18、BEX test disc TCD-714R Cueing time2 sec3 secPhillips TS4, tracks 1-15 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. Euro: 50 sec
19、. Japan: 50 sec. Frequency steps:US: 200 kHz Euro: 50 kHz Japan: 100 kHz RadioFans.CN 4 SPECIFICATIONS FM Specification (continued) FM specifications per IHF-T-200, unless other wise noted. Measurement conditions, unless otherwise noted: RF input frequency 98.1 MHz, audio frequency 1 kHz, RF input l
20、evel 65 dBf, 75 kHz Deviation: Mono 75 kHz, stereo 67.5 kHz, 7.5 kHz pilot. The performance specifications listed below apply across the entire FM band. Table notes: 1: Environmental limits apply from =10 to +40C 2: Signal to hum ratio is defined as the ratio of signal to hum and its harmonics 3: To
21、 measure usable sensitivity with C1 present, configure power cord to run straight back from the unit for one foot and then straight downward for the remainder of the power cords length. Use an EMI filter or other method to provide RF isolation at the wall outlet. 4: Use the standard European Broadca
22、st Union ARI signal with 5 kHz signal on. DK signal on and BK signal code=F Specification ParameterNominalLimit (Ambient/ Environmental1) Sensitivity usable (C1 removed) US: Euro: Japan: 13 dBf 14 dBf 13 dBf 17/23 dBf 19/25 dBf 17/23 dBf Sensitivity usable (C1 present3) US: Euro: Japan: 15 dBf 16 dB
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