Bose 1600VI Service Manual
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Bose 1600VI Service Manual

Professional stereo power amplifiers
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®
®
Model 1600VI and 1800VI Professional
Stereo Power Amplifiers
1998 Bose Corporation
Service Manual
Part Number 199747 Rev. 00

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Summary of Contents for Bose 1600VI

  • Page 1 ® ® Model 1600VI and 1800VI Professional Stereo Power Amplifiers 1998 Bose Corporation Service Manual Part Number 199747 Rev. 00...

  • Page 2: Table Of Contents

    Figure 14. Back Panel View ......................37 Figure 15. Cross Section View ....................... 38 Figure 16. 1600VI and 1800VI Amplifier Top View ................ 39 Figure 17. 1600VI and 1800VI, Amplifier Assembly Removed View ..........40 Electrical Part List ........................41-54 Packing List ............................ 55 Figure 18.

  • Page 4: Safety Information

    SAFETY INFORMATION 1. Parts that have special safety characteristics are identified by the symbol on schemat- ics or by special notes on the parts list. Use only replacement parts that have critical character- istics 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.

  • Page 5: 1800Vi Specifications

    1800VI SPECIFICATIONS 3.5"H (2U) x 19"W x 13.25"D Size: 89mm x 483mm x 337mm Net: 33 lbs. (15 kg) Weight: Shipping weight: 39 lbs. (17.7 kg) 7 LED indicators per channel Display: 1 green - READY, 5 yellow - SIGNAL, 1 red - CLIP/PROTECT 0°...
  • Page 6 40 V/µS (RFI filtering removed) > 80 dB @ 1 kHz (without Bose input module) ® CMRR: > 60 dB from 20 Hz - 20 kHz (without Bose input module) 55 W at idle Power Consumption: 800 W with musical program...

  • Page 7: 1600Vi Specifications

    1600VI SPECIFICATIONS 3.5"H (2U) x 19"W x 13.25"D Size: 89mm x 483mm x 337mm Net: 30 lbs. (13.6 kg) Weight: Shipping weight: 36 lbs. (16.3 kg) 7 LED indicators per channel Display: 1 green - READY, 5 yellow - SIGNAL, 1 red - CLIP/PROTECT 0°...
  • Page 8 Slew Rate: > 80 dB @ 1 kHz (without Bose input module) ® CMRR: > 60 dB from 20 Hz - 20 kHz (without Bose input module) 45 W at idle Power Consumption: 500 W with musical program 1000 W at full power into 8 Ohms (continuous)
  • Page 9 CH 2 Control (230V) Power Supplies Filter Only (Class H) CH 1 On/Off Standby Sequence Regulation (not used Amplifier with 1600VI) Send Phase Control CH 1 CH 2 Sequence Control CH 1 Lowpass Level Filter CH 1 CH 2 Control...

  • Page 10: Theory Of Operation

    The balanced inputs use high quality, high common-mode rejection differential amplifiers for exceptional hum and noise rejection. Through the use of equalization cards the amplifier can provide active equalization for Bose 402™, 502 A, 502B, 802...
  • Page 11 ACM-1 Amplifier Control Module in ® place of the Bose Input Module. This module retains all of the capabilities of the Bose Input Module, except sequence (see section 2.8), and includes the ability to control and monitor the amplifier over a control network. Refer to the ACM-1 Amplifier Control Module service manual, part number 199746 for more information.
  • Page 12 Local and global negative feedback from the output stage via R109, R113, R111/ R112 and R129 sets the closed-loop gain at 33.3 dB for the 1600VI and 36.0 dB for the 1800VI. Removing jumper JP100 disconnects R111 from the circuit and sets the closed-loop gain at 27.6 dB for the 1600VI and 30.3 dB for the 1800VI.
  • Page 13 1800VI, each having its own bridge rectifier and filter capacitors. The ±15 Vdc is tapped from the ±53 Vdc for the 1800VI and the ±45 Vdc for the 1600VI through R6 and R8, and regulated by Q2, Q3 and zener diodes D3 and D6. The ±15 Vdc supply powers the op-amps and small- signal transistors.
  • Page 14 THEORY OF OPERATION D2 and D3 on the Regulator Board provide overvoltage protection to U4. U4B-14 is a full-wave rectifier that outputs positive pulses to comparator U4C. The reference voltage is set at 0.7Vdc by R10 at pin 3. Where pin 2 crosses the threshold, the output of U4C-1 goes open and C6 begins to charge through R21 and U4A-8.
  • Page 15 THEORY OF OPERATION The -15Vdc supplied to U5A-4 is backed up with a voltage divider off the -106Vdc supply (R26/ R27). Without this, if the -15Vdc supply should fail for some reason, the output of U5A-1 would go high, drawing maximum current through the LED in U1 and latching the triac into full con- duction.
  • Page 16 THEORY OF OPERATION The output signal is sensed at the speaker output via the I/O Board (J2-3 Output Board to J6-3 I/O Board to J3-6 I/O Board to J1-6 Display Board). D22 half-wave rectifies the signal and provides a DC voltage proportional to the amplifier’s output to drive the signal display circuit. C2 and R19 determine the response characteristics of the display.
  • Page 17 U1, which shuts off the triac and primary current. Note: The Regulator PCB is not used in the 1600VI amplifier. 3.4 Overheated Output Transistors A thermistor (RT100) is positioned near the amplifier PCB's heatsink. As the negative coeffi- cient thermistor heats up, the voltage on comparator U2B-6 located on the I/O PCB drops.
  • Page 18 THEORY OF OPERATION 4.0 Operating Modes The Bose 1600VI and 1800VI amplifiers are capable of being configured to operate in several ® different modes in order to allow greater flexibility in use. 4.1 Bridged Mono/Dual Mono Switching The Stereo/Mono Switch (S1) on the Input Board is a three-position switch used to select Normal Stereo, Bridged Mono or Dual Mono operation.

  • Page 19: Disassembly/Assembly Procedures

    DISASSEMBLY/ASSEMBLY PROCEDURES Note: It's advisable to mark or note wiring Note: Refer to Figure 6 for the following configuration before any disassembly procedures. begins. For more information refer to the Wiring Diagrams Figures 19 and 20. 3. Display Board Removal Note: Refer to Figures 2, 3 and 4 for the 3.1 Remove the cover (1) using following procedures.
  • Page 20 Cover 1800 SERIES V PROFESSIONAL AMPLIFIER FOR BRIDGED BRIDGED OPERATIONS 1400 W 8 D.O.M. CONSULT BOSE CORPORATION, FRAMINGHAM, MA 01701-9168 MADE IN U.S.A. OWNERS MANUAL LICENSED UNDER U.S. PAT. NO. 4,484,150 700 W 4 700 W 4 CAUTION AVIS 100V...
  • Page 21 Qty 28 Output Board Amplifier Terminals WL1, WL2, Board WL100, WL101, WL200 and WL201 Qty 6 I/O Board J3 Connector Shield Over Q214 and Q216 I/O Board I/O Board J100 and J200 Connectors Figure 6. 1600VI and 1800VI Amplifier Assembly...
  • Page 22 Figure 7. Bottom Mounted Components...
  • Page 23 6.4 Connect the cables from the line cord Note: The regulator board is not used in (31) (for 240V, line cord and ground) to the the 1600VI amplifier. line filters terminals (10). 5.1 Remove the cover (1) using 6.5 Connect the cables to power supply procedure 1.
  • Page 24 DISASSEMBLY/ASSEMBLY PROCEDURES Note: Refer to Figures 5, 6 and 7 for the 11.3 Place the chassis (2) on its side. following procedures. 11.4 While holding the transformer with one hand, use a phillips-head screwdriver to 9. Line Filter Removal remove four screws (13) and washers (14) 9.1 Remove the cover (1) using from the bottom of the chassis.
  • Page 25 DISASSEMBLY/ASSEMBLY PROCEDURES 14.5 Connect the amplifier and power Note: Some cables are bundled together. supply board (7) cables to the output board Cut any wire wraps when necessary. (16) WL1, WL2, WL100, WL101, WL200 and WL201 terminals. Refer to Wiring 13.5 Note the locations of RT100, RT200, Diagram Figure 19.
  • Page 26 DISASSEMBLY/ASSEMBLY PROCEDURES 15.9 Using a phillips-head screwdriver, 16.4 Connect the output board black wires remove four screws (29) from the two to the binding posts (items 24 or 25) by brackets (22) that secure the heatsink (18) tightening four nuts with a wrench. Refer to to the inside of the chassis back panel.
  • Page 27 Attaches Fan Shield to Chassis Note: The regulator board is not used in Qty 2 Heatsink Attaches the 1600VI amplifier. Shields to Fan Connector Insulation Bracket 17.9 Remove four screws (30), one from each corner of the power supply board with AIR FLOW a phillips-head screwdriver.
  • Page 28 DISASSEMBLY/ASSEMBLY PROCEDURES The screws are located over the fan 18. Power Supply Board Replacement exhaust slot. 18.1 Attach the power supply board (7) to the heatsink (18) by tightening four screws 19.4 Release the lower shield from the (30) into each corner of the board. Use a bottom of the chassis by removing two phillips-head screwdriver.
  • Page 29 DISASSEMBLY/ASSEMBLY PROCEDURES Note: Refer to Figure 6 for the following Note: Refer to Figures 4, 10 and 11 for the procedures. following procedures. 21. I/O Board Removal 23. Input Module Removal 21.1 Use Procedure 15, Steps 15.1-15.12 23.1 Use a phillips-head screwdriver to to remove the chassis cover (1), disconnect remove two screws (3) from the input cabling, and to move the heatsink (18),...
  • Page 30 Module, as well as EQ outputs and se- quence control. It will accommodate one connector is completely seated into the Bose EQ card for each channel. Refer to I/O board two-pin harness connector. the ACM-1 Amplifier Control Module service The ACM-1 module should be flush with the chassis back panel.

  • Page 31: Test Procedures

    TEST PROCEDURES Only if you are connected to a Bose control network using the required Bose software will you be able to pass audio through an amplifier with a Bose ACM-1 Amplifier Control Module installed. Refer to the ACM-1 service manual part number 199746 for more information.
  • Page 32 TEST PROCEDURES 3. Distortion Level 6. Thermal Shut Down Test 3.1 Apply a 1.5 Vrms, 1 kHz signal for low 6.1 Remove the top cover using Disassem- sensitivity units, or a 775 mVrms, 1 kHz bly/Assembly procedure 1. signal for high sensitivity units, to the amplifier channel under test.
  • Page 33 9.2 The bottom-most LEDs on the display load. Refer to the layout diagrams for part located on the front panel should be locations. The rail voltage for the 1600VI illuminated. amplifier is not adjustable. 9.3 While observing the LEDs on the front 11.1 Use a DVM to measure the DC level...

  • Page 34: Part List Notes

    8. Australian units. 9. Japanese units. PART LISTS AND EXPLODED VIEWS The following section contains part lists and exploded views for the 1600VI and 1800VI Amplifiers. The part lists are broken down as follows: • Main Part List and Layout Views •...

  • Page 35: Main Part List

    MAIN PART LIST 1600VI and 1800VI Amplifiers (see Figures 13-17) Item Description Part Number Q t y . Note Number Cover, PC, Gray 182740 182739 5, 6, 9 Chassis, 1800VI, DOM 199793 5, 7, 8 1800VI, ECE 199791 4, 6, 9...
  • Page 36 MAIN PART LIST 1600VI and 1800VI Amplifiers (see Figures 13-17) Item Description Part Number Q t y . Note Number Screw, MA, FHP, 6-32 x 1-1/4, blk, upper fan 182718 shield Screw, STP, PHP, 4 x 1/2, AB, w/washer, BO,...
  • Page 37 MAIN PART LIST 1600VI and 1800VI Amplifiers (see Figures 13-17) Item Description Part Number Q t y . Note Number Standoff, .280d x .625l, Locking Nylon, between 199751 pwr supply and reg. Standoff, PEM, 6-32 x 1/2, ST UP 199776 Standoff, PEM, 6-32 x .188, ST UP...
  • Page 38 Qty 4 Attaches Qty 4 clamp Qty 4 Qty 2 AIR FLOW Qty 4 Qty 2 Qty 2 Figure 15. Cross Section View...
  • Page 39 Figure 16. 1600VI and 1800VI Amplifier Top View...
  • Page 40 Figure 17. 1600VI and 1800VI, Amplifier Assembly Removed View...

  • Page 41: Electrical Part List

    ELECTRICAL PART LIST Amplifier PCB Assembly Reference Designator Description Part Number Note PCB Assy, Amplifier, 199781 1, 2, 4 1600VI PCB Assy, Amplifier, 182756 1, 2, 5 1800VI Resistors Reference Designator Description Part Number Note R100, 200 1k, CF, 1/4W, 5%...
  • Page 42 ELECTRICAL PART LIST Capacitors Reference Designator Description Part Number Note C106, 206 22pF, Ceramic Disc, 10%, 182776 1000V C109, 209 4.7uF, AE, AXL, 20%, 50V 182784 C110, 111 .01uF, CRML, RDL, +80 182780 -20, 100V C112, 113, 210, 211 .082uF, MPE, 5%, 50V 182781 Diodes Reference Designator...
  • Page 43 ELECTRICAL PART LIST Power Supply PCB Assembly Reference Designator Description Part Number Note PCB Assy, Power Supply, 199782 1, 2, 4 1600VI PCB Assy, Power Supply, 182757 1, 2, 5 1800VI Resistors Reference Designator Description Part Number Note 270Ω, CF, 1/4W, 5% 182850 8.2Ω, CF, 1/2W, 5%...
  • Page 44 ELECTRICAL PART LIST Capacitors Reference Designator Description Part Number Note C12, 18, 21, 28, 32, 35, 42, 43 .0018uF, PE, Radial, 10%, 182840 100V C13, 20, 29, 34 390pF, Ceramic Disc, 10%, 182835 1000V C14, 22, 30, 36 100uF , AE, AXL, 20%, 25V 182843 C15, 23, 31, 37 .01uF, Ceramic Disc, 20%,...
  • Page 45 Jumper, 18AWG, .5in, 182882 Insulated WL1, 2, 3, 4, 5, 6, 7, 8 Connector Tab, .250, 182825 PCMT Heatsink, Power Supply, 199794 1600VI/1800VI Heatsink, .75H, TO-3, 199778 Bridge Rectifier Insulator, Sil-Pad, K-6, 8- 182886 Insulator, Sil-Pad, K-6, 182887 TO216 Spacer, Push-in .250L 182826 Stand-off, .140id x .25...
  • Page 46 ELECTRICAL PART LIST Input/Output PCB Assembly Reference Designator Description Part Number Note PCB Assy, Input/Output, 182758 1, 2, 4, 1600VI/1800VI Resistors Reference Designator Description Part Number Note R1, 3 62k, CF, 1/4W, 5% 182906 100k, MF, Fuse, 1/4W, 5% 199752 2.2k, CF, 1/4W, 5%...
  • Page 47 ELECTRICAL PART LIST Diodes Reference Designator Description Part Number Note D1, 2, 6, 7, 8, 9, 12, 13, 14, 15, 16, 17, 1N4148 182868 18, 20, 21, 22, 23, 24, 27, 29, 30, 31, 32, 33, 34, 36 D3, 4 Bridge Rect, 50V, 1.0A, 182912 DF005...
  • Page 48 ELECTRICAL PART LIST Output PCB Assembly Reference Designator Description Part Number Note PCB Assy, Output, 182759 1, 2, 4, 1600VI/1800VI Resistors Reference Designator Description Part Number Note 130Ω, Metal Oxide Film, 182932 3W, 5% 910Ω, MF, Fuse, 1/4W, 5% 182810...
  • Page 49 ELECTRICAL PART LIST Integrated Circuits Reference Designator Description Part Number Note Dual Volt Comparators, 182879 LM393 Miscellaneous Reference Designator Description Part Number Note K100, 200 Relay, SPST, NO, 24V, 182942 L100, 200 Choke, 5uH, 14AWG Wire 182941 Header, 14p, Dual Row, .1 182922 CTR, G Header, 2p, .1 CTR,...
  • Page 50 ELECTRICAL PART LIST Regulator PCB Assembly Note: The Regulator PCB Assembly is not used in the 1600VI Amplifier Reference Designator Description Part Number Note PCB Assy, Regulator, 182760 1, 2, 5 1800VI Resistors Reference Designator Description Part Number Note 150k, CF, 1W, 5%...
  • Page 51 ELECTRICAL PART LIST Diodes Reference Designator Description Part Number Note D2, 3 Zener, 1N4736A, 6.8V 182961 D4, 5, 7, 8, 9 1N4148 182868 Zener, 1N4735A, 6.2V 182962 Transistors Reference Designator Description Part Number Note NPN, 2N4123, TO-92, 182913 Small Signal Integrated Circuits Reference Designator Description...
  • Page 52 ELECTRICAL PART LIST Display PCB Assembly Reference Designator Description Part Number Note Assy, PCB Display, 182762 1, 2, 4, 1600VI/1800VI Resistors Reference Designator Description Part Number Note R9, 10, 13, 17, 24, 35 10.0k, MF, 1/4W, 1% 182800 R11, 18 2.21k, MF, 1/4W, 1%...
  • Page 53 ELECTRICAL PART LIST Input Module PCB Assembly Reference Designator Description Part Number Note PCB Assy, Input Module, 182755 1, 2, 4, 1600VI/1800VI Resistors Reference Designator Description Part Number Note R52, 53, 54, 55, 60, 62 332k, MF, 1/4W, 1% 183000 120Ω, CF, 1/4W, 5%...
  • Page 54 ELECTRICAL PART LIST Transistors Reference Designator Description Part Number Note NPN, MPSA06, TO-92 182874 Q2, 3 PNP, MPSA56, TO-92 182875 Integrated Circuits Reference Designator Description Part Number Note U1, 2 Bal Line Rcvr, SSM2141 183005 U3, 4, 5, 6 Op-Amp, w/Switch 183004 Dual Op-Amp, BiFET, 182821...

  • Page 55: Packing List

    Box, Shipping, 1600VI 199799 1800VI Sleeve, Cord holder, 13 1/4 x 12 182752 Foam, Packaging, 2U 182753 180118 Manual, Owners, 1600VI/1800VI Bag, Plastic, 20 x 30 199775 Foot, Rubber, Blk, .81sq x .3h 199779 Figure 18. 1600VI and 1800VI Amplifiers Packing Diagram...

  • Page 56: Wiring Diagrams

    WIRING DIAGRAMS Figure 19. 1600VI and 1800VI Wiring Diagram...
  • Page 57 WIRING DIAGRAMS LINE LOAD LINE FILTER LINECORD GRN/YEL GRN/YEL SWITCH SEQUENCE BLU/BLK SWITCH RING FUSE POWER SUPPLY BOARD POWER SWITCH REGULATOR BOARD (Not used in 1600VI Amp) Figure 20. 1600VI and 1800VI 240V Wiring Diagram...

  • Page 58: Ic Pinout Diagrams

    4. -Vcc 3. Source 5. Non-inverting input 2 6. Inverting input 2 7. Output 2 8. +Vcc ® Bose Part Number 182878, IRFZ44 Bose Part Number 182821, TL072 1. Output1 1. Anode 2. Inverting input1 2. Cathode 3. Non-inverting input 1 3.
  • Page 59 6. Base 10. Op-Amp 2 Non-inv Input 11. VEE/GND 12. Op-Amp 1 Inv Input 13. Op-Amp 1 Non-inv Input 14. Op-Amp 1 Output ® Bose Part Number 182965, CNY17-2 Bose Part Number 182964, MC3405P Cathode 1. Reference 25k Ohm Identifier 2.
  • Page 60 SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE ® ® Bose Corporation The Mountain Framingham, Massachusetts USA 01701 P/N: 199747 Rev. 00 12/98 FOR TECHNICAL ASSISTANCE OR PART ORDERS, CALL 1-800-367-4008...

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