Bose L1 Pro8 Service Manual
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Bose L1 Pro8 Service Manual

Portable line array system
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L1 Pro8
Portable Line Array System
Service Manual
©2020 Bose Corporation
Reference Number 840919-SM
REV 03

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Summary of Contents for Bose L1 Pro8

  • Page 1 L1 Pro8 Portable Line Array System Service Manual ©2020 Bose Corporation Reference Number 840919-SM REV 03...

  • Page 2: Table Of Contents

    Figure 2. L1 Pro8 Power Stand Exploded View ..................12 MAIN ASSEMBLY LIST, L1 Pro8 IO Panel Assy................13-14 Figure 3. L1 Pro8 IO Panel Assy Exploded View ...................15 MAIN ASSEMBLY LIST, L1 Pro8 Array Speaker..................16 Figure 4. L1 Pro8 Array Speaker Exploded View ...................17 MAIN ASSEMBLY LIST, L1 Pro8 Extension....................18...
  • Page 3 CONTENTS Title Page TEST PROCEDURE..........................41-45 HI-POT TEST.............................46 SOFRWARE UPDATE..........................47-48 SERVICE MANUAL REVISION HISTORY....................49...

  • Page 4: Safety Information

    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 L1 Pro8 Portable Line Array System contains no user-serviceable parts. To prevent warranty infractions, refer servicing to warranty service stations or factory service.

  • Page 5: Electrostatic Discharge Sensitive (Esds) Device Handling

    WARRANTY The Bose L1 Pro8 Portable Line Array System is covered by a limited 5-year transferable warranty. Units that fail within 90 days of sale should be replaced. PART LIST NOTES 1.

  • Page 6: Product Description

    Array extension Subwoofer power stand The L1 Pro8 can be assembled without using the array extension; the mid-high array can be connected directly to the subwoofer power stand. This configuration is most useful when on an elevated stage to be...
  • Page 7 Bluetooth® Pair Button: Set up pairing with Bluetooth capable devices. The LED will flash blue while the L1 Pro is discoverable and illuminate solid white when a device is paired for streaming. 6 • English L1 Pro8/Pro16 Portable Line Array System • Owner's Guide...
  • Page 8 PRODUCT DESCRIPTION...

  • Page 9: Packaging Part List

    Packaging Part List L1 Pro8 ( includes Array) (see Figure 1) Item Bose Part Vendor Part Description Notes Number Number Number CARTON 859613-0010 T302001585000 EXTENSION ASSY 833679-0110 T910000075580 CARRY BAG, BLACK 856991-0110 T310000075000 MANUAL BAG 865047-0010 TOP EPE FOAM 857376-0010...

  • Page 10: Main Assembly List, L1 Pro8 Power Stand

    Main Part List L1 Pro8 Power Stand (see Figure 2) Item Description Bose Material Vendor Part Notes Number Number Number WASHER, OD12.7XID8.5XT2.0 T181200000740 WASHER, OD16XID8.1XT1.1 T181200000590 PE FOAM, ADHESIVE, BLACK, DS11 K T180500031200 BRACKET, ANTENNA T100424500100 SCREW, T3.5XL10 T15335101F610 SILICON FOAM, 25 DEGREE, TOP...
  • Page 11 Main Part List L1 Pro8 Power Stand (see Figure 2) Item Description Bose Material Vendor Part Notes Number Number Number GRILLE ASSY, POWER STAND, SVCE 861200-011S T130207400100 SILICON FOAM, 25 DEGREE, FRONT T180200015750 CABLE, TW1+EQ, 6PIN T641700169000 ENCLOSURE, LEFT T100422600100...
  • Page 12 Power Stand Exploded View L1 Pro8 Figure 2. Power Stand Exploded View...

  • Page 13: Main Assembly List, L1 Pro8 Io Panel Assy

    Main Part List L1 Pro8 I/O Panel Assy (see Figure 3) Item Description Bose Material Vendor Part Notes Number Number Number EVA, 38 DEGREE, ADHESIVE, BLACK, T180500012350 DS11 K SCREW, M3.0XL9, BLUE ZINC+NYL T15130091C610 SCREW, T3XL8, 1.3P, NICKEL T153300612631 SHIELD COVER, SECC T130207700100 SCREW, T3.0XL12, 1.06P NICKEL...
  • Page 14 Main Part List L1 Pro8 I/O Panel Assy (see Figure 3) Item Description Bose Material Vendor Part Notes Number Number Number LIGHT GUIDE, POLARITY T100402300100 BUTTON, SELECTION, PC+ABS T100402900100 BUTTON, MUTE, MILK T100403300200 NON WOVEN, ADHESIVE, BLACK, T182900003180 DS11 SCREW, T3XL12, .3P, ZINC+NICKEL...
  • Page 15 I/O Panel Assy Exploded View L1 Pro8 Figure 3. I/O Panel Assy Exploded View...

  • Page 16: Main Assembly List, L1 Pro8 Array Speaker

    Main Part List L1 Pro8 Array Speaker (see Figure 4) Item Description Bose Material Vendor Part Notes Number Number Number BAFFLE, ARRAY T100423500100 DRIVER, 2 IN 812886-0010 T911600010920 SCREW, T3XL10 T15330101F611 CABLE, ARRAY, 6PIN T641700169100 CABLE, TW, CONNECT SINGLE T641700168700...
  • Page 17 Array Speaker Exploded View L1 Pro8 Figure 4. Array Speaker...

  • Page 18: Main Assembly List, L1 Pro8 Extension

    PC SHEET, PRODUCT LABEL T911700056730 The array extension is not repairable. The above parts are listed for reference only. Note: Bose part number is 833679-0110 (EXTENSION ASSY) as listed in the packaging parts list. L1 Pro8 Figure 5. Extension Exploded View...

  • Page 19: Main-I/O Pcb Part List

    MAIN-I/O PCB PARTS LIST Resistors Reference Designator Description Material Number Note R103 RES, THICK FILM, 0603, 0.1W, 1%, 5.6K 857326-0166 R113 RES, THICK FILM, 0402, 0.063W, 1%, 6.8K 857326-0084 R116, R172, R320, R327, RES, THICK FILM, 0402, 0.063W, 1%, 10 OHM 857326-0089 R329, R336, R367, R371, R387, R389-R390, R393,...
  • Page 20 MAIN-I/O PCB PARTS LIST Resistors (continued) Reference Designator Description Material Number Note R229A, R229B RES, THICK FILM, 0603, 0.1W, 1%, 220 OHM 857326-0126 R230A, R230B RES, THICK FILM, 0603, 0.1W, 1%, 2.1K 857326-0124 R250A, R250B, R251A, RES, THICK FILM, 0603, 0.1W, 1%, 150 OHM 857326-0107 R251B R258A, R258B, R259A,...
  • Page 21 MAIN-I/O PCB PARTS LIST Resistors (continued) Reference Designator Description Material Number Note RES, THICK FILM, 0603, 0.1W, 1%, 28K 857326-0137 R35, R53 R36, R43, R57, R65, RES, THICK FILM, 0805, 0.125W, 1%, 100 857326-0186 R198A, R198B, R207A, R207B R364, R195A, R195B, RES, THICK FILM, 0603, 0.1W, 1%, 1K 857326-0092 R202A, R202B, R208A,...
  • Page 22 MAIN-I/O PCB PARTS LIST Resistors (continued) Reference Designator Description Material Number Note R58, R61, R173, R270, RES, THICK FILM, 0603, 0.1W, 1%, 100K 857326-0094 R306, R315, R323, R366, R415, R227A, R227B, R234A, R234B RES, THICK FILM, 0603, 0.1W, 1%, 18K 857326-0116 R71, R83-R84, R97 R72, R75, R79, R89, R92,...
  • Page 23 MAIN-I/O PCB PARTS LIST Capacitors (continued) Reference Designator Description Material Number Note C125 CAP,C0G,0402,50V,5%,1000pF,COMM 766718-102J1H C138A, C138B, C145A, CAP, C0G, 1206, 50V, 5%, 0.1uF, COMM 852048-104J1H C145B C141A, C141B, C157A, CAP, C0G, 0603, 50V, 5%, 2700pF, COMM 780788-272J1H C157B, C167A, C167B, C179A, C179B C142A, C142B, C144A, CAP, EL, LOW Z, SMT, 63V, 20%, 22uF, COMM...
  • Page 24 MAIN-I/O PCB PARTS LIST Capacitors (continued) Reference Designator Description Material Number Note C65, C69, C83, C95, C100, CAP, X7R, 0402, 50V, 10%, 10000pF, COMM 718866-103K1H C102, C106, C109-C118, C120, C126-C131, C202, C214, C273-C277, C285-C287, C304 C67, C76, C79, C88, CAP, C0G, 0402, 50V, 5%, 100pF, COMM 766718-101J1H C185A, C185B, C187A, C187B, C188A, C188B,...
  • Page 25 MAIN-I/O PCB PARTS LIST Inductors Reference Designator Description Material Number Note INDUCTOR, WW, CM, 1206, 0.2A, 2200 OHM, 855607-222 COMM BEAD, FERRITE, PWR, 0603, 1.3A, 600 OHM, 852198-601 COMM BEAD, FERRITE, 0402, 0.1A, 1800 OHM, 840686-182D COMM INDUCTOR, POWER, SMT, 1.2A, 30%, 2.2uH, 852851-2R2N COMM INDUCTOR, POWER, SMT, 0.7A, 20%, 220uH,...
  • Page 26 MAIN-I/O PCB PARTS LIST Integrated Circuit Reference Designator Description Material Number Note IC, ADC, AUDIO, 4CH, TLV320ADC5140, 855431-0010 24WQFN IC, DAC, 24bit, 4CH, PCM4104, 48TQFP 855451-0010 IC, uC, CORTEX-M0, 256KB, 32F091, 852528-VCT6 100LQFP IC, V-DETECT, 2.93V, APX809S-29, SOT-23 856551-0010 U15A, U15B IC, ANALOG SWITCH, SPST, 16TSSOP, 852384-0010 DG411...
  • Page 27 MAIN-I/O PCB PARTS LIST Miscellaneous Reference Designator Description Material Number Note SW1-SW2, SW4, SW6- SWITCH, TACT, 12V, 50mA, 250gf 850862-0010 SW10 SWITCH, TACT, 15V, 20mA, 320GF 854394-0010 TRANSFORMER, AUDIO, DIGITAL, DIL, 1mH 856463-0010 USB1 CONN, IO, TYPE C, 24P, R, SMT, RA, 853416-0010 TMOUNT, CH2.2 CONN, RECP, 1.27mm C, 16P, 2R, R, SMT, ST...

  • Page 28: Power-Amp Pcb Part List

    POWER-AMP PCB PARTS LIST Resistors Reference Designator Description Material Number Note R100 RES, THICK FILM, 0603, 0.1W, 1%, 200K 857326-0121 R101 RES, THICK FILM, 0603, 0.1W, 1%, 18.2K 857326-0117 R102-R103 RES, THICK FILM, 0603, 0.1W, 1%, 2.4K 857326-0132 R104-R105 RES, THICK FILM, 1206, 0.25W, 1%, 100K 857326-0197 R111 RES, THICK FILM, 0603, 0.1W, 1%, 75 OHM...
  • Page 29 POWER-AMP PCB PARTS LIST Resistors (continued) Reference Designator Description Material Number Note RES, THICK FILM, 0603, 0.1W, 1%, 133K 857326-0104 R47, R72, R79, R87 RES, THICK FILM, 0603, 0.1W, 1%, 100K 857326-0094 RES, THICK FILM, 0603, 0.1W, 1%, 130K 857326-0103 R49-R51 RES, THICK FILM, 1206, 0.25W, 1%, 240K 857326-0205...
  • Page 30 POWER-AMP PCB PARTS LIST Capacitors (continued) Reference Designator Description Material Number Note C234, C238, C253, C260 CAP, C0G, 0402, 50V, 5%, 100pF, COMM 766718-101J1H C236-C237 CAP, X5R, 0402, 16V, 10%, 1uF, COMM 716994-105K1C CAP, FILM, PFC, 15mm, BULK 6mm, 630V, 856507-105K2JBB 10%, 1uF C261...
  • Page 31 POWER-AMP PCB PARTS LIST Diodes Reference Designator Description Material Number Note DIODE BRIDGE, RECT., 15A, 600V 311087-0600 D11, D18-D22 DIODE, RECT, FAST, 1000V, 0.8A, RS1ML, 856386-1000 FLSMA D14, ZD7-ZD10 DIODE, ZENER, 0.2W, 15V, 5%, SOD-323F 856094-15V0 D23, D26, D28, D34-D35 DIODE, SWITCHING, 100V, 0.15A, SOD323F 856395-0010 D6-D7...
  • Page 32 POWER-AMP PCB PARTS LIST Integrated Circuit (continued) Reference Designator Description Material Number Note IC, VREG, SW, FLYBACK CNTRLR, HF500-30, 855588-0010 7PDIP U4, U10 IC, LIN REG, ADJ, SHUNT, TL431, 1%, SOT23- 330361-1030 IC, SW, CNTRLR, HALF-BRIDGE, HR1001A, 855754-0010 16SOIC IC, OP AMP, DUAL, LM358, 8SOIC 856447-0010 Miscellaneous Reference Designator...

  • Page 33: Volume Pcb Part List

    VOLUME PCB PARTS LIST Resistors Reference Designator Description Material Number Note R71-R72 RES, THICK FILM, 0402, 0.063W, 1%, 6.8K 857326-0084 R73-R83 RES, THICK FILM, 0402, 0.063W, 1%, 10K 857326-0021 Capacitors Reference Designator Description Material Number Note C1, C3, C8, C10, C12-C13 CAP, X7R, 0402, 25V, 10%, 0.1uF, COMM 718866-104K1E C14-C15...

  • Page 34: Disassembly Procedure

    ESD damage. Be sure to use an approved and tested ESD strap that is properly grounded to your work bench before attempting disas- sembly or repair of the L1 Pro8 Portable Line Array System. 1. Enclosure Bottom Removal 1.1 Remove the Mid-high array and Array extension.
  • Page 35 DISASSEMBLY PROCEDURE 1.4 Use your hands and lift up on the Enclosure bottom as indicated in Figure 9. Figure 9. Enclosure Bottom Removal 2. Grille Removal 2.1 Perform procedure 1. 2.2 Pull the Grille out gently. Figure 10. Note: When installing the Grille, make sure the Grille inserted into the Grille guides.
  • Page 36 DISASSEMBLY PROCEDURE 3.2 Incline the Power stand to let the I/O panel assy go downwards as indicated in Figure 12. Note: Be careful the I/O panel assy is very heavy. Figure 12. Incline the Power Stand 3.3 Once the I/O panel assy is out from the Enclosure, you will notice that the 2 Volume board cables &...
  • Page 37 DISASSEMBLY PROCEDURE 4. Power-Amp Board Removal 4.1 Perform procedure 3. 4.2 On the front of the I/O panel assy, remove the 6 screws (left) and turn it over to remove the 3 screws (right) securing the Power-Amp board as indicated in Figure 15. Figure 15.
  • Page 38 DISASSEMBLY PROCEDURE 4.4 Use a spudger to separate the white glue from the edge of PCB as indicated in Figure 5. Main-I/O Board Removal 5.1 Perform step 4. On the Fire box, remove the 5 screws that secure the Main-I/O board as indicated in Figure 20 (left).
  • Page 39 Figure 24. Note: Be careful the Woofer is very heavy. Figure 24. Press the White Fastener L1 Pro8 Array Procedures 1. Grille Removal 1.1 Remove the 8 screws that secure the Endcaps from both ends of the Line Array as indicated in Figure 25.
  • Page 40 DISASSEMBLY PROCEDURE 1.2 Lift off the Top and Lower endcap. Figure Note: Be careful the cable of Lower endcap is very short. Figure 26. Lower Endcap Removal 1.3 Grasp the Grille and carefully slide the Grille off of the baffle. Figure 27. Re-assembly Note: Be sure there is sufficient gasket material on the battle to prevent buzz- es as the red arrow indicated in Figure 28.

  • Page 41: Test Procedure

    TEST PROCEDURE Required Equipment: 1. Bose L1 Pro8 Power Stand and Line Array (unit under test) 2. Audio Signal Generator, Audio Precision ATS-1 or equivalent 3. iPod Touch/Smart Phone with audio test files / music installed 4. T4S or T8S (with power supply) and ToneMatch cable 5.
  • Page 42 TEST PROCEDURE 2. Line Input / Output Verification Tests Refer to the Connections and Controls diagram on the previous page for the following tests. Note: DO NOT assemble the line array to the power stand. The below test would be very loud with the array connected to the power stand.
  • Page 43 3 AUX input. It will flash BLUE while the L1 Pro power stand is discoverable. 4.2 Using a Smart phone or similar, open your Bluetooth connections settings. Look for the L1 Pro8 and connect to it. Once you are connected the BLUETOOTH PAIR button on the power stand will illuminate solid white.
  • Page 44 TEST PROCEDURE 5.2 Connect an audio input to the T4S/T8S. Verify that you can play the audio from the T4S/T8S through the power stand with no noticeable distortion. 6. Phantom Power Test 6.1 Press the STANDBY button (11) to turn on the power stand. The button should illuminate white. 6.2 Press the Phantom Power button (6) on the power stand.
  • Page 45 TEST PROCEDURE Button Extended Functions Test (continued): Product I/O User Trigger User action control “Off/Live/Music/Speech” LED House Short press the button will be ON. Select corresponding Curve and the LED to posi- House Curve. Flat/Live/DJ/ button tion-1/2/3/4 Voice LED Channel LED: To position-1 is volume, position-2 is Treble, Short press the encoder position-3 is Bass, position-4 is...

  • Page 46: Hi-Pot Test

    HI-POT TEST 1. Hi-Pot Test Procedure THIS IS A MANDATORY TEST 1.1 Connect the positive side (hot) of the Hi-Pot tester to both terminals of the AC mains CAUTION - All units that are disassembled as input. part of a repair MUST be Hi-Pot tested before being returned to the customer.

  • Page 47: Sofrware Update

    SOFTWARE UPDATE These instructions explain how to update the firmware of your L1 Pro8, L1 Pro16, Compatible Web Browsers L1 Pro32, Sub1, or Sub2. Windows Google Chrome, Mozilla Firefox, Note: A USB-C cable is required (not included with your product). The L1 Pro family of Microsoft Edge products is not compatible with Thunderbolt 3 cables.
  • Page 48 SOFTWARE UPDATE If your product needs a software update, your screen will read, There’s an update available for your product! Click Update Now. Note: Do not unplug or power off your product while the update is in progress. 10. Once the update is complete, your screen will read, Your product is now up-to-date!. English •...

  • Page 49: Service Manual Revision History

    SERVICE MANUAL REVISION HISTORY Revision Changes Driven Pages (s) Date Description of Changes Level Affected 11/9/2020 Document released at revision 00 Initial Release 12/24/2020 Add Software Update Page 47, 48 2/17/2022 Add Item 4-10 Page 9 3/30/2023 Add Item 49 Part number Page 11...
  • Page 50 Bose Corporation 100 The Mountain Road Framingham Massachusetts USA 01701 Reference Number 840919-SM REV 03, 3/2023 http://serviceops.bose.com...

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