Bose AM-30P Page 1 Service Manual Download

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2008

Bose Corporation

Service Manual

Part Number 194382 REV

Powered Acoustimass

-30

Speaker System

AM-30P

Summary of Contents for AM-30P

Page 1: ...2008 Bose Corporation Service Manual Part Number 194382 REV 1 Powered Acoustimass 30 Speaker System AM 30P...

Page 2: ...Block Diagram 21 Disassembly Assembly Procedures 22 28 Figure 10 Screw Location 22 Figure 11 Cover Latch Rotated In 22 Figure 12 Cover Latch Rotated Out 22 Figure 13 Base Plate Tabs 22 Figure 14 Modul...

Page 3: ...eads 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 milliamp Reverse the unit powe...

Page 4: ...DS 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 stat...

Page 5: ...surround 25W Left Center Right 0 2 THD Input Impedance System Module Satellites 8 3k 4 8 woofers wired in parallel 8 4 Twiddlers wired in series Output Noise A weighted for Satellite channels 300 Vrm...

Page 6: ...st a general operation and block diagram overview will be given See Figure 8 block diagram followed by a detailed description of each diagram block that will reference the schematic diagram 2 GENERAL...

Page 7: ...acted from one will equal zero Hence for this condition the center channel signal L R will be multiplied by zero and no audio will be passed on to the center channel output If a mono signal is applied...

Page 8: ...pin 1 of DIN connector J5 It is direct coupled to the base of Q601 When the AM 30P receives the turn on pulse from the CD 20 Q604 and Q601 conduct and provide a current path through opto coupler U604...

Page 9: ...IC U8 The output of the volume control is buffered by op amp U17 and the two paths are summed together through resistors R120 and R121 At full volume the audio signal flows predominantly through U8 an...

Page 10: ...nnel Frequency Response 1E1 1E2 1E3 1E4 1E5 FREQUENCY HERTZ 0 5 10 15 20 25 30 35 40 45 50 R E S P O N S E D B CENTER CHANNEL FREQUENCY RESPONSE 1E1 1E2 1E3 1E4 1E5 FREQUENCY HERTZ 0 5 10 15 20 25 30...

Page 11: ...Right Channel Frequency Response 1E1 1E2 1E3 1E4 1E5 FREQUENCY HERTZ 0 5 10 15 20 25 30 35 40 45 50 R E S P O N S E D B BASS CHANNEL LEFT RIGHT CHANNEL FREQUENCY HERTZ 40 35 30 25 20 15 10 5 0 R E S...

Page 12: ...10 the voltage at the inverting input of the op amp is forced to be equal to the non inverting voltage by feedback through transistor Q700 This voltage appears across resistor R710 and forces a curren...

Page 13: ...t surround amplifier U11 pin 12 will be zero but the L R signal at U10 pin 14 that is allowed to independently pass forward through the inverting input of differential amplifier U10 is equal to zero a...

Page 14: ...channel signals from the decoder are applied to differential amplifier U300 pins 12 13 and 14 This stage is also used for gain adjustment and has a range from 6dB boost to 14dB cut The signal is pass...

Page 15: ...i fier is short circuit and thermally protected External to this IC is a pair of TO 220 Darlington transistors the same as used in the discrete bass amplifier to perform the Class G power supply switc...

Page 16: ...16 Figure 5 Voltage at Collector of Q381 Bass Amplifier Figure 6 Treble Control Frequency Response...

Page 17: ...clipped audio conditions the power amplifier IC through feedback main tains the voltage across its input terminals to less than 1mV Each comparator has its non inverting input biased at 120mV from vol...

Page 18: ...mparator U600 pin 8 through a 1M resistor This node has a normal bias of 2 0VDC U600 is configured as a window comparator that will trigger below 1V or above 3V If any one of the amplifiers experience...

Page 19: ...19 Figure 7 Simplified Block Diagram of Shared 2 Channel Class G Amplifier...

Page 20: ...20 Figure 8 PCB Block Diagram...

Page 21: ...21 L in R L R L L R L R L out R out C out S out B out R in DETECTOR 1 DC CONTROL DC CONTROL 1 L R L R L R L R L R L R DUAL VOL CTL Figure 9 Surround Decoder Block Diagram...

Page 22: ...rclock wise until the pointed section of the latch is outside the cover and enclosure See Figures 11 13 and 15 Figure 13 Base Plate Tabs Figure 11 Cover Latch Rotated In Rotate pointed section out to...

Page 23: ...ter bracket 6 3 3 Disconnect the transformer s 5 pin connector from J7 the 8 pin cable from the amplifier and the flat ribbon cable 8 from connector J8 on the main PCB 3 4 Release the main PCB 5 from...

Page 24: ...osure Disassembly Back of Module Cover Base Plate Tabs Base Plate Tabs Cover Latch Open Close Figure 15 Cover Assembly 2 8 8 2 2 9 2 1 18 17 21 19 20 Module Label Side Input and Output Connectors Inpu...

Page 25: ...assembly 5 Pin J7 Connector J10 Connector 8 Pin Cable Cover Latch Flat Ribbon Cable Back of Cover Input and Output J5 J9 J11 Connectors Base Plate J2 Connector J8 Connector 2X 5 10 11 Apply Thermal Gr...

Page 26: ...the metal plate 11 so that the rectangular slot is on the same side as the amplifier PCB s J1 connector The side marked Outside Should be facing out Insert this side of the metal plate into the slot o...

Page 27: ...s of the base plate 4 Make sure the transformer is positioned so that the pri mary wires red white brown orange black that connect to the J7 connector are facing the PCB 8 2 Connect the transformer s...

Page 28: ...The grille assembly with the name plate 3 should be on the bottom satellite cube 3 Twiddler Removal 3 1 Perform procedure 1 3 2 Remove the four grommets 6 cover ing the screws that hold the twiddler...

Page 29: ...reference point which has to be connected MANUAL TEST MODE The microcontroller can be manually configured to operate in several different Test Modes to facilitate input output troubleshooting and rep...

Page 30: ...utput should be 0 1 8 dB referenced to the measurement taken in 2 2 Output Measurement Surround Channel 0dB reference Left Channel 20dBr Right Channel 20dBr Center Channel 16dBr 6 Surround Channel 6 1...

Page 31: ...ase 10 2 Reference a dB meter to the surround channel output 10 3 Measure the surround channel output according to the following table 8 Left Right Channel Frequency Re sponse 8 1 Apply a 2 5kHz 100mV...

Page 32: ...r Channel Mute Set the unit to test mode F Apply a 1 0kHz 5Vrms signal to the left and right channel inputs in phase The center channel output should be 30mVrms 12 3 Surround Channel Mute Set the unit...

Page 33: ...illator to 40Hz 27mVrms Listen for air leaks around the cabinet paying particular attention to the area where the base plate seals to the cabinet If there is a whooshing noise there is probably an air...

Page 34: ...digit number with a dash variant Below is a list of the numbers and the corresponding AM P module assembly Do not mix the PCB s from one AM P product with another Product Service Main PCB Variation Ma...

Page 35: ...ET BASE PLATE 172295 2 14 TRANSFORMER 115 230V 182577 1 3 15 CUSHION TRANSFORMER 176169 2 16 GASKET CONNECTOR COVER 186845 1 17 SCREW TAPP 8 11x1 25 PAN XRC S 172672 20 8 18 MODULE ASSY AM 30P 120V MO...

Page 36: ...iew 2X 5 10 11 13 12 2 8 8 2 2 9 2 1 18 17 21 19 20 Not Applicable for 13 23 63 Module Assemblies Voltage Select Switch for 115 230V Units 1 5 16 2X 7 6 3 15 14 4 8 10 MAIN PCB Amplifier Subassembly E...

Page 37: ...597 6 81k CHIP 0805 1 133625 6811 R106 123 134 135 206 223 231 235 611 616 710 2 00k CHIP 0805 1 133625 2001 R107 109 207 209 309 408 409 508 509 564 602 605 612 636 4 02k CHIP 0805 1 133625 4021 R11...

Page 38: ...CHIP 0805 5 133626 2015 R390 395 75 CHIP 0805 5 133626 7505 R391 JUMPER CHIP 0805 133627 R392 648 220 0805 1 10W 5 133626 2215 R393 5 1 1206 1 8W 5 124895 5R15 R398 600 33 2k CHIP 0805 1 133625 3322...

Page 39: ...0pF 0805 X7R 50V 10 133623 332 C104 162 186 204 262 286 615 621 625 100pF 0805 COG 50V 5 133622 101 C105 106 153 205 206 253 047uF BOX 85 63V 5 137127 473 C107 207 027uF BOX 85 100V 5 137127 273 C108...

Page 40: ...2uF BOX 85 50V 5 137127 224 C307 453 033uF BOX 85 100V 5 137127 333 C308 001uF BOX 85 100V 5 137127 102 C376 100uF EL 105 16V 20 139734 101 C377 378 1uF 1206 Y5V 16V 80 173383 105 C389 626 628 270pF 0...

Page 41: ...Number Note Q177 179 277 279 379 385 386 PNP SMALL 119168 Q175 180 275 280 377 380 383 384 601 NPN TAPE 117921 Q176 276 381 382 DARL P TIP146T 172285 Q178 278 387 388 DARL N TIP141T 172284 Q375 JFET...

Page 42: ...WG 190701 001 Y601 602 120V JUMPER 22AWG INSUL 7mm 135091 070 F1 FUSE CLIP 5mm 178548 L600 INDUCTOR LM4532 1uH 178370 1R0 F601 FUSE 5X20mm SLO BLO 3M 263401 3000 3 R5 6 20 OHM FUSING 1 4W 130102 200 3...

Page 43: ...92935 03 1 2 Grille Assembly Lower Black 192935 02 1 2 Grille Assembly Lower White 192935 04 1 3 Nameplate Black 178725 01 1 3 Nameplate White 178725 02 1 4 Twiddler 2 25 273244 002 or 291636 001 2 5...

Page 44: ...188009 001 1 15 Carton D C CD20 DISP LS25 188020 001 1 16 Packing Insert Card CD20 188022 1 17 Packing Top Pad EPS Display PK 186424 001 1 18 Packing Tray EPS LS20 DISP PK 186425 001 1 19 Envelope Sh...

Page 45: ...CD20 CD20 Pack 7 8 10 5 9 11 13 13 CD20 PACK DUAL VOLTAGE UNITS ARE PACKED WITH A 120V AND 220V POWER PACK 14 AM25P BASS BOX SATELLITE ASSEMBLY PACK 3 28 27 26 30 29 34 35 36 33 4 6 31 2 32 12 Breaks...

Page 46: ...r P N 172297 MOC3063T Main PCB Assembly U604 Pin Connection 1 Output 2 2 Output 1 3 V 4 Input 1 5 Input 1 6 Input 2 7 Input 2 8 Input 3 9 Input 3 10 Input 4 11 Input 4 12 GND 13 Output 4 14 Output 3 V...

Page 47: ...S Volume Control P N 147622 TC9213P Main PCB Assembly U8 U9 U12 Operational Amplifier Quad P N 186112 TL074 Main PCB Assembly U6 U7 U10 U14 U16 U300 U703 Operational Amplifier Dual P N 132591 CA3280 M...

Page 48: ...9 Stand by 8 Vs Signal 7 Vs Signal 6 Bootstrap 5 N C 4 SUR 3 Non Inverting Input 2 Inverting Input 1 Stand by GND EEPROM 1KB P N 147536 59C11 Main PCB Assembly U602 Audio Power Amplifier P N 170156 TD...

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