Bose SM-1 User Manual

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©1998 Bose Corporation
Service Manual
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Summary of Contents

Page 1 - Service Manual

®®©1998 Bose CorporationService Manual

Page 2 - Contents

10TEST PROCEDURE1. Rub and Tick Test1.1 Apply a 10 Hz, 25 Volts rms signal(with the use of an amplifier) to the speakerterminals. Refer to Figure 8.

Page 3 - SAFETY INFORMATION

11TEST PROCEDUREFrequency Response TableFrequency Below 40SwitchTrebleDecreaseSwitchTrebleContourResponsedB901 IResponsedB901 IITolerancedB20 Hz OFF O

Page 4 - SPECIFICATIONS

12PART LIST901 Speaker Part ListItem NumberDescription Part NumberNote--- Driver 103342 4--- Grille, Front 103514-03 4--- Grille, Rear 103512-03 4--

Page 5 - TECHNICAL DESCRIPTION

13Figure 9. 901 I Schematic Diagram

Page 6

14Figure 10. 901 II Schematic Diagram

Page 7 - Flat Blade Screwdriver

Figure 11. 901 Schematic Diagram (first production run)15

Page 8

2 PROPRIETARY INFORMATIONTHIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OFBOSE® CORPORATION WHICH IS BEING FURNISHED ONLY

Page 9

3CAUTION: THE BOSE® 901 I and II EQUALIZERS CONTAIN NO USER-SERVICEABLEPARTS. TO PREVENT WARRANTY INFRACTIONS, REFER SERVICE TO WARRANTYSERVICE STATI

Page 10 - TEST PROCEDURE

4SPECIFICATIONS901 Series I and II SpeakerDimensions: 20-9/16" W x 12-3/4" H x 12-7/8" DWeight: 33 lbsNominal Impedance: 8 ohmsPercenta

Page 11

5TECHNICAL DESCRIPTIONThe Bose® 901 speakers represent a fundamental advance in realistic home music reproduc-tion. The unique acoustic design of the

Page 12 - PART LIST NOTES

6TECHNICAL DESCRIPTIONFigure 1. Equalizer Controls Response Charts

Page 13

DISASSEMBLE/ASSEMBLY PROCEDURE901 Speaker Disassembly/Assembly1. Grille Removal1.1 Locate the staples that secure the frontor rear grille assembly.

Page 14

8DISASSEMBLE/ASSEMBLY PROCEDURE901 EQ Disassembly/Assembly5. PCB Removal5.1 Perform procedure 1.5.2 Remove the four screws that securethe PCB to the

Page 15

9901 I EQ901 II EQFigure 5. Top CoverFigure 6. Front Panel AssemblyFigure 7. Indicator Lens Assembly

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