manualshive.com logo in svg

Bose FREESPACE 4400, Service Manual, Page: 82 / 107

Share
Download
Bose FREESPACE 4400 Service Manual Download Page 82

82

THEORY OF OPERATION

The analog section of the DSP board contains the two stereo codecs (U503, U507) and their
associated analog input and output circuitry. Line 1 and 2 each have two inputs that are resis-
tively mixed and buffered through difference amplifiers (U529, U532). Each of the difference
amplifiers feed a channel of the volume control (U531) that in turn drives the two dual op-amps
(U501, U504) that convert the single ended signals to differential drive for the codec.

Mic in and Page in are balanced inputs, each driving an instrumentation amplifier (U537, U540).
These two channels each have a voltage regulator (U536, U539) that can be enabled by the
host to provide phantom power to external mics. The gain of the voltage regulator is controlled
by the host switching on analog switch sections (U541, U542, U543) that connect gain control
resistors. The range of gain is 0 to 60 dB in 10 dB increments.

The outputs of the instrumentation amplifiers are each served by ½ of an op amp (U538) to a
fixed DC offset of 2.5V to provide one half of the differential drive to the second codec. Each
channel is inverted by half of a dual op-amp (U505) to provide the second phase of differential
drive to the codec. Each of the four input channels is fed to a multiplexer (U535) that selects
one channel under host control for output as music on hold.

The four differential outputs of the codecs drive four identical circuits built around switchable
amplifiers (U509, U510, U511, U512). One differential input of each is configured as a low-pass
filter and differential to single ended converter and is fed from a codec output. The second input
is connected to a common input signal, the direct input. A PNP transistor circuit (Q502) detects
ground on the PTT input and switches the switchable amplifiers to the direct input while also
signaling the PIC to inform the host that an override is occurring. The four switchable amplifiers
drive the power amplifier inputs from the selected input signal path.

The outputs from the switchable amplifiers also drive four channels of amplitude sense circuitry.
Each sense path consists of an op-amp gain stage followed by a low pass filter, a high pass
filter and a precision rectifier/average circuit. The op-amps are contained in dual op-amps
(U700, U706) and quad op-amps (U702, U703, U704, U705).

3. LED Board
The LED board contains the front panel indicator LEDs and the standby switch. Power is applied
to this board even when the unit is in standby and is regulated to 5V by U105 voltage regulator
and to 3.3V by U107 voltage regulator. Serial input from the host on the DSP board drives a
sequence of three serial in, parallel out shift registers (U102, U103, U104) to drive the LEDs.
To reduce power consumption three inverters from U101 are configured as an oscillator to
multiplex the LED drive. Two more of the inverters are used to buffer and debounce the standby
switch. When the standby button is pushed the signal is detected by the PIC processor on the
DSP board, which then communicates over the I2C bus with the host processor.

4. Auto-volume Microphone Sense Board
The auto-volume microphone sense board contains the input and level control circuitry for four
sense mics and an RS-232 connector to allow the 4400 system to communicate with an exter-
nal PC. Power is not applied to this board when the unit is in standby. The board regulates
analog power supply voltages with a positive 15V regulator (U216) and a negative 15V regulator
(U215). There is also a positive 8V regulator (U204) to provide power to the external sense
mics.

Summary of Contents for FREESPACE 4400

Page 1: ... 2008 Bose Corporation Reference Number 294963 SM Rev 00 Service Manual FreeSpace 4400 Business Music System Electronic Copy Only ...

Page 2: ... Mic Sense PCB Top Etch Board Layout Diagram 85 Figure 5 Mic Sense PCB Bottom Etch Board Layout Diagram 85 Figure 6 Flash Memory PCB Top Etch Board Layout Diagram 85 Figure 7 Flash Memory PCB Bottom Etch Board Layout Diagram 85 Figure 8 Wallplate Sense PCB Top Etch Board Layout Diagram 86 Figure 9 Wallplate Sense PCB Bottom Etch Board Layout Diagram 86 Figure 10 AC Power Selector PCB Top Etch Boar...

Page 3: ...aragraph 9 1 1 With the unit AC switch first in the ON position and then in OFF position measure from a known earth ground metal waterpipe conduit etc to all exposed metal parts of the unit antennas handle bracket metal cabinet screwheads 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 ...

Page 4: ...ng to time of day or day of week Opti Voice Paging Provides the appropriate sound level regardless of variations in speech projection Source Leveling Automatically compensates for variations in source input levels Dynamic Equalization Maintains tonal balance at all listening levels Room Equalization Provides easy adjustment of tonal balance in each zone Limiting Protects loudspeakers from unwanted...

Page 5: ...6 kg Shipping 41 lb 18 6 Kg AC Mains input IEC standard User selectable 100 120 or 220 240V 3 pin 50 60 Hz receptacle 300 Watts maximum Overall Performance Nominal Limits Conditions Gain 0 dB 1 dB At 1 kHz input gain set to nominal 0 dB Dynamic range 100 dB 96 dB Measured with ADC DAC full scale mapped to 17 dBV this is THD N measured at FS 60 through A weighting filter and expressed in dB below f...

Page 6: ...20 kHz 0 dB gain THD N 001 01 At 10 dBV output 1 kHz 20 dB gain Crosstalk at 1 kHz 90 dB 80 dB Crosstalk at 10 kHz 70 dB 60 dB Frequency response 30 to 20 kHz 1 5 dB Reference 1 kHz measured at 20 dB gain and with 0 dBV output Page and Aux Mic Inputs Nominal Limits Conditions Source impedance 200 Ohms 10 to 2k Ohm Frequency response specification maintained with sources over this range Input imped...

Page 7: ...1 kHz measured at 60 dB gain and 20 kHz with 0 dBV output Sense Mic inputs Nominal Limits Conditions Source impedance 200 Ohms 10 to 2k Ohm Frequency response specification maintained with sources over this range Input impedance differential 20k Ohm 5 At 1 kHz Equivalent input noise at 60 dB at 60 dB A weighted RMS 200 Ohm source termination at INA129 gains of 60 127 dBV 125 dBV dB 40 dB and 20 dB...

Page 8: ...dance differential 10kOhms 20 At 1 kHz CMRR referred to output 92 dB 60 dB At 1 kHz 20 dB gain 200 Ohm source impedance Input sensitivity 20 dBV to 1 dB At 1 kHz for codec FS 17 dBV Gain 0 dB 1 dB From input connector to amplifier input stage Maximum input level 17 dBV 17 dBV THD N 0 3 30 20 kHz 0 dB gain THD N 001 01 At 10 dBV output 1 kHz 20 dB gain Crosstalk at 1 kHz 90 dB 80 dB Crosstalk at 10...

Page 9: ...32W with the unit set for no EQ and the loudspeaker 3 feet from listener Music on Hold MOH Nominal Limits Conditions Output impedance 400 Ohms 1 Impedance at 1 kHz Maximum output level 17 dBV 17 dBV 1 kHz THD less than 0 1 load 10k Ohm differential Output noise 90 dBV 85 dBV A weighted set for 0 dB gain THD N 001 01 At 17 dBV output 1 kHz 0 dB gain Crosstalk at 1 kHz 90 dB 80 dB Set for 0 dB gain ...

Page 10: ...hm load A weighted 200W THD N at 100 Vrms 5 1 7 kHz 12 5 Ohm load A weighted 400W Sensitivity at 70V 11 dBV 1 dBV Sensitivity at 100V 14 dBV 1 dBV Gain 26 dB 0 5 dB Output noise 70 dBV 65 dBV A weighted with a 20 kHz filter Crosstalk at 1 kHz 90 dB 80 dB Set for 0 dB gain no limiting terminate the unused input with a 50 Ohm resistor Crosstalk at 10 kHz 70 dB 60 dB Turn on off pop 10 mV peak 50 mVp...

Page 11: ...ontains ESDS 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 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...

Page 12: ...o Volume Mic Kit U S PC 042354 One sensing microphone that can be mounted as is or in a standard U S single gang junction box FreeSpace 4400 System Auto Volume Mic Kit Euro PC 042355 One sensing microphone that can be mounted as is or in a standard Euro single gang junction box Volume up 2 dB steps Volume down 2 dB steps Mute or Auto volume on off Select LINE 1 input source Select LINE 2 input sou...

Page 13: ... 172930 04 260621 02 SVC EXPO11 KIT 1481 0500 0 4135 6501 0 1497 1932 0 1497 2402 0 2901 4012 3000 4157 1121 0 3001 1631 0 2113 3252 0 2113 3143 0 2113 3147 0 2113 3258 0 1 1 2 1 1 8 4 2 7 2 4 5 4 4 4 4 3 4 AC POWER CORD 120V US CAN AC POWER CORD 230V EURO AC POWER CORD 100V JAPAN AC POWER CORD 230V UK AC POWER CORD 240V AUS 298165 298166 298167 298168 298169 7012 7340 0 7012 6980 0 7012 5530 0 70...

Page 14: ...1 0500 0 1 4 2 POLYBAG 04x5x9 1497 1932 0 1 4 3 BRACKET RACK EAR 4135 6501 0 2 4 4 LABEL VOLTAGE SELECT 170206 3001 1631 0 2 5 POLY BAG 04x5x6 1497 2402 0 1 4 6 SCREW MACHINE FLAT CS 298706 2901 4012 3000 8 7 FOOT RUBBER 298707 4157 1121 0 4 8 2 TERMINAL OUTPUT CONN 260621 02 2113 3258 0 5 9 4 TERMINAL INPUT CONN 172930 04 2113 3147 0 4 10 2 TERMINAL INPUT CONN 172930 02 2113 3252 0 7 11 3 TERMINA...

Page 15: ...41 3008 3000 6 4 14 TRANSFORMER TOROIDAL AC 301393 1806 3954 0 1 3 15 WASHER M4x0 8x10 MM 2600 8010 1602 1 4 16 SPRING WASHER 2607 8020 1540 1 4 17 BOLT FASTENER 4135 7111 0 1 4 18 END CAP FRONT PANEL 301405 4155 2001 0 2 19 NUT M3 NICKEL 2640 3022 0544 4 4 20 LOCK WASHER BLK 2607 3008 0607 4 4 21 WASHER METAL NICKEL 2600 3008 1004 4 4 22 FAN DC 24V 0 3A 4200 RPM 304149 8913 0008 1 1 3 23 PANEL FR...

Page 16: ...SCREW S TITE PLAT CS 2941 3012 3000 10 4 42 HEATSINK 220x124 2x70 MM 5400 9741 0 1 4 43 INSUL SHT 24x19x2 MM 3100 7081 0 8 4 44 GND TERMINAL 4135 6981 0 6 4 45 CLIP HEATSINK 4135 6511 0 4 4 46 POST SUPPORT PCB 4155 2401 0 3 4 47 S TITE BLK 2944 3008 3000 3 4 48 PILLAR STANDOFF 4135 7121 0 3 4 FLASH MEMORY PCB ASSY 301401 SVC EXPO01 FLASH 1 2 SURGISTOR 8A 0 7 OHM N15SP2R5M 313000 5202 0027 0 1 3 FU...

Page 17: ...720 5620 J 4 R121 562 OHM RMG 0805 1 10W 1 4720 5620 J 4 R122 562 OHM RMG 0805 1 10W 1 4720 5620 J 4 R123 562 OHM RMG 0805 1 10W 1 4720 5620 J 4 R124 562 OHM RMG 0805 1 10W 1 4720 5620 J 4 R125 562 OHM RMG 0805 1 10W 1 4720 5620 J 4 R126 562 OHM RMG 0805 1 10W 1 4720 5620 J 4 R127 562 OHM RMG 0805 1 10W 1 4720 5620 J 4 R128 1 1K RMG 0805 1 10W 1 4720 112A J 4 R135 10K RMG 0805 1 10W 1 4720 103A J ...

Page 18: ...50V DO 214AA SMD PANJIT 480S 1A00 3 4 Integrated Circuits Reference Designator Description Vendor Part Number Note U101 SN74HC14D SOP PACKAGE 3130 8680 0 4 U102 8 BIT SHIFT REG M74HC595M1R SO16 ST 3132 3591 0 4 U103 8 BIT SHIFT REG M74HC595M1R SO16 ST 3132 3591 0 4 U104 8 BIT SHIFT REG M74HC595M1R SO16 ST 3132 3591 0 4 U105 VOLT REG SMD POS NJM78L05UA SOT89 3132 3601 0 4 ...

Page 19: ... 1271 J 4 R522 5 49K RMG 1 10W 1 0805 4720 5491 J 4 R523 2K RMG 1 10W 1 0805 4720 202A J 4 R524 2K RMG 1 10W 1 0805 4720 202A J 4 R525 182 OHM RMG 1 10W 1 0805 4720 1820 J 4 R526 7 87K RMG 1 10W 1 0805 4720 7871 J 4 R528 100K RMG 1 10W 1 0805 4720 104A J 4 R529 5 11K RMG 1 10W 1 0805 4720 5111 J 4 R530 18 2K RMG 1 10W 1 0805 4720 1822 J 4 R531 18 2K RMG 1 10W 1 0805 4720 1822 J 4 R532 5 11K RMG 1 ...

Page 20: ...84 4 75K RMG 1 10W 1 0805 4720 4752 J 4 R585 301 OHM RMG 1 10W 1 0805 4720 3010 J 4 R586 301 OHM RMG 1 10W 1 0805 4720 3010 J 4 R587 301 OHM RMG 1 10W 1 0805 4720 3010 J 4 R588 301 OHM RMG 1 10W 1 0805 4720 3010 J 4 R589 10K RMG 1 10W 1 0805 4720 103A J 4 R590 26 7K RMG 1 10W 1 0805 4720 2672 J 4 R591 301 OHM RMG 1 10W 1 0805 4720 3010 J 4 R592 301 OHM RMG 1 10W 1 0805 4720 3010 J 4 R593 301 OHM R...

Page 21: ... RMG 1 10W 1 0805 4720 112A J 4 R654 1K RMG 1 10W 1 0805 4720 102A J 4 R658 22 6K RMG 1 10W 1 0805 4720 2262 J 4 R659 22 6K RMG 1 10W 1 0805 4720 2262 J 4 R660 5 49K RMG 1 10W 1 0805 4720 5491 J 4 R661 5 49K RMG 1 10W 1 0805 4720 5491 J 4 R662 1 62K RMG 1 10W 1 0805 4720 1621 J 4 R663 1 62K RMG 1 10W 1 0805 4720 1621 J 4 R664 499 OHM RMG 1 10W 1 0805 4720 4990 J 4 R665 499 OHM RMG 1 10W 1 0805 472...

Page 22: ...012 J 4 R706 49 9K RMG 1 10W 1 0805 4720 4992 J 4 R707 10K RMG 1 10W 1 0805 4720 103A J 4 R708 43 2K RMG 1 10W 1 0805 4720 4322 J 4 R709 11K RMG 1 10W 1 0805 4720 113A J 4 R710 49 9K RMG 1 10W 1 0805 4720 4992 J 4 R711 15K RMG 1 10W 1 0805 4720 153A J 4 R712 22 1K RMG 1 10W 1 0805 4720 2212 J 4 R715 20K RMG 1 10W 1 0805 4720 203A J 4 R716 22 1K RMG 1 10W 1 0805 4720 2212 J 4 R717 30 1K RMG 1 10W 1...

Page 23: ... 0805 4720 9091 J 4 R760 10K RMG 1 10W 1 0805 4720 103A J 4 R761 1 1K RMG 1 10W 1 0805 4720 112A J 4 R762 24 9K RMG 1 10W 1 0805 4720 2492 J 4 R763 4 99K RMG 1 10W 1 0805 4720 4991 J 4 R764 3 09K RMG 1 10W 1 0805 4720 3091 J 4 R765 2K RMG 1 10W 1 0805 4720 202A J 4 R766 2K RMG 1 10W 1 0805 4720 202A J 4 R771 0 OHM RMG 1 10W 5 0805 4720 000J J 4 R772 0 OHM RMG 1 10W 5 0805 4720 000J J 4 R773 0 OHM ...

Page 24: ...2 2uF CE 35V 20 SMD 3X5 4 UWX1V2R2MCR2GB NCC 157Q 225M 3 EJC 4 C517 4 7uF CE 25V 20 SMD 4X5 3 157E 475M 3 GJ 4 C518 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C519 68pF CC 50V 5 0805 1 25X2 0 150F 680J J BDM 4 C521 2200pF CC 50V 10 0805 1 2x2 0 150F 222K J BD 4 C522 470pF CC 50V 5 0805 1 2x2 0 150F 471J J BD 4 C523 68pF CC 50V 5 0805 1 25X2 0 150F 680J J BDM 4 C525 0 1uF CC 25V 10 0805 1 2x2 0 ...

Page 25: ... CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C567 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C568 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C569 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C570 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C572 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C573 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C575 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C5...

Page 26: ...F CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C626 330uF CE 25V 20 8X10 SMD UUD1E331MCR1GB NCC 157E 337M 3 OSC 4 C627 2200pF CC 50V 10 0805 1 2x2 0 150F 222K J BD 4 C628 100pF CC 50V 5 0805 1 2x2 0 150F 101J J BD 4 C629 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C630 330uF CE 25V 20 8X10 SMD UUD1E331MCR1GB NCC 157E 337M 3 OSC 4 C631 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C632 1000pF CC 50V 5...

Page 27: ...C666 0 01uF CC 50V 5 0805 150F 103J J BD 4 C667 22uF CE 16V 20 SMD 5X5 8 UUD1C220MCR1GS NICHICON 157D 226M 3 IKC 4 C668 10uF CE 25V 20 5 3X5 4 SMD UWX1E100MCR1GB NCC 157E 106M 3 JJC 4 C669 10uF CE 25V 20 5 3X5 4 SMD UWX1E100MCR1GB NCC 157E 106M 3 JJC 4 C670 10uF CE 25V 20 5 3X5 4 SMD UWX1E100MCR1GB NCC 157E 106M 3 JJC 4 C671 0 01uF CC 50V 5 0805 150F 103J J BD 4 C672 0 01uF CC 50V 5 0805 150F 103J...

Page 28: ...150E 104K J BD 4 C704 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C705 1500pF CC 50V 5 0805 150F 152J J BD 4 C706 100uF CE 25V 20 6 3X7 7 SMD UWX1E101MCR1GB NCC 157E 107M 3 LOC 4 C707 3300pF CC 50V 10 0805 1 2x2 0 150F 332K J BD 4 C708 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C709 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C710 1500pF CC 50V 5 0805 150F 152J J BD 4 C711 0 1uF CC 25V 10 0...

Page 29: ...4 C741 0 01uF CC 50V 5 0805 150F 103J J BD 4 C742 33pF CC 50V 5 0805 1 2x2 150F 330J J BD 4 C743 33pF CC 50V 5 0805 1 2x2 150F 330J J BD 4 C744 33pF CC 50V 5 0805 1 2x2 150F 330J J BD 4 C745 33pF CC 50V 5 0805 1 2x2 150F 330J J BD 4 C746 33pF CC 50V 5 0805 1 2x2 150F 330J J BD 4 C747 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C748 0 33uF CC 16V 5 0805 150D 334J J BD 4 C749 1000pF CC 50V 5 0805 ...

Page 30: ...4 D529 DO 214AA 1A 50V S1A SMD PANJIT 480S 1A00 3 4 D530 DO 214AA 1A 50V S1A SMD PANJIT 480S 1A00 3 4 D531 DO 214AA 1A 50V S1A SMD PANJIT 480S 1A00 3 4 D532 DO 214AA 1A 50V S1A SMD PANJIT 480S 1A00 3 4 D533 DO 214AA 1A 50V S1A SMD PANJIT 480S 1A00 3 4 D534 SCHOTTKY 30V 0 2A BAT42W SOD123 SMD PANJIT 480T 42W0 3 4 D535 1N4148W SOD 123 SMD PANJIT 4801 48W0 3 4 D536 BAV99 SOT23 PHILIPS 4840 8970 3 4 D...

Page 31: ...T27LV010A PLCC32 ATMEL 3132 3731 0 4 U517 DSP DSPF56362 LQFP 144 MOTOROLA 3132 3741 0 4 U518 32KX8 RAM IS61C256AH 15JI SOJ28 ISSI 3132 3921 0 4 U519 LATCH D OCT 74ACT573M SOIC20 ST 3132 3751 0 4 U520 MCU TSC80251G2D PLCC 44 ATMEL 3132 3761 0 4 U521 NOR GATE X 4 74HC02 SO14 ST 3132 3771 0 4 U522 OR GATE QUAD 74HC32 SO14 ST 3132 3781 0 4 U523 REAL TIME CLOCK RTC8564JE VSOJ20 EPSON 3132 3791 0 4 U524...

Page 32: ...132 3901 0 4 U700 OP AMP DUAL NJM4559M SOIC 8 JRC 3132 3641 0 4 U702 OP AMP QUAD NJM2059M SOIC 14 JRC 3132 3681 0 4 U703 OP AMP QUAD NJM2059M SOIC 14 JRC 3132 3681 0 4 U704 OP AMP QUAD NJM2059M SOIC 14 JRC 3132 3681 0 4 U705 OP AMP QUAD NJM2059M SOIC 14 JRC 3132 3681 0 4 U706 OP AMP DUAL NJM4559M SOIC 8 JRC 3132 3641 0 4 Miscellaneous Digital Signal Processor PCB Assembly Reference Designator Desc...

Page 33: ...ES MOLEX 2101 3136 0 4 J403 CONN 2P P5 08 ST BLK 90C BEAU39860 SERIES MOLEX 2101 3136 0 4 J404 HEADER IDC 16P 2XP2 54 3510 SERIES 2101 3129 0 4 J502 HEADER IDC 40P 2XP2 54 3510 SERIES 2101 3130 0 4 J503 CONN 4P P5 08 ST BLK 90C BEAU39860 SERIES MOLEX 2101 3138 0 4 J504 JACK RCA 4P 90 DEG ARGENT PLATING 2113 3172 0 4 J508 CONN 4P P5 08 ST BLK 90C BEAU39860 SERIES MOLEX 2101 3138 0 4 J509 CONN 3P P5...

Page 34: ...K RMG 1 10W 1 0805 4720 4322 J 4 R234 49 9K RMG 1 10W 1 0805 4720 4992 J 4 R235 15K RMG 1 10W 1 0805 4720 153A J 4 R236 15K RMG 1 10W 1 0805 4720 153A J 4 R237 22 1K RMG 1 10W 1 0805 4720 2212 J 4 R240 1 1K RMG 1 10W 1 0805 4720 112A J 4 R241 9 09K RMG 1 10W 1 0805 4720 9091 J 4 R242 20K RMG 1 10W 1 0805 4720 203A J 4 R243 22 1K RMG 1 10W 1 0805 4720 2212 J 4 R244 30 1K RMG 1 10W 1 0805 4720 3012 ...

Page 35: ...K RMG 1 10W 1 0805 4720 2212 J 4 R300 30 1K RMG 1 10W 1 0805 4720 3012 J 4 R301 49 9K RMG 1 10W 1 0805 4720 4992 J 4 R302 10K RMG 1 10W 1 0805 4720 103A J 4 R303 11K RMG 1 10W 1 0805 4720 113A J 4 R304 43 2K RMG 1 10W 1 0805 4720 4322 J 4 R306 49 9K RMG 1 10W 1 0805 4720 4992 J 4 R307 15K RMG 1 10W 1 0805 4720 153A J 4 R308 15K RMG 1 10W 1 0805 4720 153A J 4 R309 22 1K RMG 1 10W 1 0805 4720 2212 J...

Page 36: ... SMD 3X5 4 UWX1V2R2MCR2GB NCC 157Q 225M 3 EJC 4 C213 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C214 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C215 33pF CC 50V 5 0805 1 2x2 150F 330J J BD 4 C218 1000pF CC 50V 5 0805 1 25X2 0 150F 102J J BDM 4 C220 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C222 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C223 100uF CE 25V 20 6 3X7 7 SMD UWX1E101MCR1GB ...

Page 37: ... 6 3X7 7 SMD UWX1E101MCR1GB NCC 157E 107M 3 LOC 4 C262 3300pF CC 50V 10 0805 1 2x2 0 150F 332K J BD 4 C263 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C264 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C266 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C267 1500pF CC 50V 5 0805 150F 152J J BD 4 C269 0 1uF CC 25V 10 0805 1 2x2 0 150E 104K J BD 4 C270 100uF CE 25V 20 6 3X7 7 SMD UWX1E101MCR1GB NCC...

Page 38: ...A 50V S1A SMD PANJIT 480S 1A00 3 4 D204 BAV99 SOT23 PHILIPS 4840 8970 3 4 D206 BAV99 SOT23 PHILIPS 4840 8970 3 4 D207 BAV99 SOT23 PHILIPS 4840 8970 3 4 D208 BAV99 SOT23 PHILIPS 4840 8970 3 4 D210 BAV99 SOT23 PHILIPS 4840 8970 3 4 D212 BAV99 SOT23 PHILIPS 4840 8970 3 4 D213 BAV99 SOT23 PHILIPS 4840 8970 3 4 D214 DO 214AA 1A 50V S1A SMD PANJIT 480S 1A00 3 4 D215 DO 214AA 1A 50V S1A SMD PANJIT 480S 1...

Page 39: ...720 4992 J 4 R16 4 7K RMG 1206 1 8W 1 4721 472A 6 4 R17 301 OHM RMG 0805 1 10W 1 4720 3010 J 4 R18 10K RMG 0805 1 10W 1 4720 103A J 4 R19 10K RMG 0805 1 10W 1 4720 103A J 4 R20 2K RMG 0805 1 10W 1 4720 202A J 4 R21 10K RMG 0805 1 10W 1 4720 103A J 4 R22 200K RMG 1206 1 4W 1 4725 204A 6 4 R23 10K RMG 0805 1 10W 1 4720 103A J 4 R24 1K RMG 0805 1 10W 1 4720 102A J 4 R25 2K RMG 0805 1 10W 1 4720 202A ...

Page 40: ... 1 4720 103A J 4 R66 20K RMG 0805 1 10W 1 4720 203A J 4 R67 20K RMG 0805 1 10W 1 4720 203A J 4 R68 10K RMG 0805 1 10W 1 4720 103A J 4 R69 10K RMG 0805 1 10W 1 4720 103A J 4 R70 2K RMG 0805 1 10W 1 4720 202A J 4 R71 10K RMG 0805 1 10W 1 4720 103A J 4 R72 10K RMG 0805 1 10W 1 4720 103A J 4 R73 10K RMG 0805 1 10W 1 4720 103A J 4 R74 20K RMG 2512 1W 5 4728 203J 3 4 R75 200K RMG 0805 1 10W 1 4720 204A ...

Page 41: ... 1 4720 202A J 4 R117 4 99K RMG 0805 1 10W 1 4720 4991 J 4 R118 10K RMG 0805 1 10W 1 4720 103A J 4 R119 10K RMG 0805 1 10W 1 4720 103A J 4 R120 4 99K RMG 0805 1 10W 1 4720 4991 J 4 R121 4 99K RMG 0805 1 10W 1 4720 4991 J 4 R122 1K RMG 0805 1 10W 1 4720 102A J 4 R123 1K RMG 0805 1 10W 1 4720 102A J 4 R124 33 OHM RMG 2512 1W 5 4728 330J 3 4 R125 33 OHM RMG 2512 1W 5 4728 330J 3 4 R126 10 OHM RMG 251...

Page 42: ...8 203J 3 4 R167 18K RMG 0805 1 10W 1 4720 183A J 4 R168 10K RMG 0805 1 10W 1 4720 103A J 4 R170 10K RMG 0805 1 10W 1 4720 103A J 4 R171 200K RMG 0805 1 10W 1 4720 204A J 4 R172 200K RMG 0805 1 10W 1 4720 204A J 4 R173 200K RMG 0805 1 10W 1 4720 204A J 4 R174 200K RMG 1206 1 4W 1 4725 204A 6 4 R175 200K RMG 1206 1 4W 1 4725 204A 6 4 R176 20 OHM RWR 5W 5 RL 474B 200J 5 4 R177 20 OHM RWR 5W 5 RL 474B...

Page 43: ...720 103A J 4 R219 10K RMG 0805 1 10W 1 4720 103A J 4 R220 10K RMG 0805 1 10W 1 4720 103A J 4 R221 10K RMG 0805 1 10W 1 4720 103A J 4 R222 10K RMG 0805 1 10W 1 4720 103A J 4 R223 39 2K RMG 2512 1W 1 4728 3922 3 4 R224 39 2K RMG 2512 1W 1 4728 3922 3 4 R225 39 2K RMG 2512 1W 1 4728 3922 3 4 R226 39 2K RMG 2512 1W 1 4728 3922 3 4 R227 3 83M RMG 1206 1 4W 1 4725 3834 6 4 R228 3 83M RMG 1206 1 4W 1 472...

Page 44: ... R265 1K RMG 0805 1 10W 1 4720 102A J 4 R266 1K RMG 0805 1 10W 1 4720 102A J 4 R267 1K RMG 0805 1 10W 1 4720 102A J 4 R268 1K RMG 0805 1 10W 1 4720 102A J 4 R269 20K RMG 0805 1 10W 1 4720 203A J 4 R270 20K RMG 0805 1 10W 1 4720 203A J 4 R271 20K RMG 0805 1 10W 1 4720 203A J 4 R272 20K RMG 0805 1 10W 1 4720 203A J 4 R297 200K RMG 0805 1 10W 1 4720 204A J 4 R298 200K RMG 0805 1 10W 1 4720 204A J 4 R...

Page 45: ...20 102A J 4 R415 5 1M RMG 0805 1 10W 1 4720 515A J 4 R416 20K RMG 0805 1 10W 1 4720 203A J 4 R417 4 7K RMG 0805 1 10W 1 4720 472A J 4 R418 16 OHM RMG 2512 1W 5 4728 160J 3 4 R419 1K RMG 0805 1 10W 1 4720 102A J 4 R420 5 1M RMG 0805 1 10W 1 4720 515A J 4 R421 20K RMG 0805 1 10W 1 4720 203A J 4 R422 4 7K RMG 0805 1 10W 1 4720 472A J 4 R423 16 OHM RMG 2512 1W 5 4728 160J 3 4 R424 1K RMG 0805 1 10W 1 ...

Page 46: ...5 3X5 4 SMD UWX1V100MCR1GB NCC 157Q 106M 3 JJC 4 C27 10uF CE 35V 20 5 3X5 4 SMD 157Q 106M 3 JJC 4 C28 10uF CE 35V 20 5 3X5 4 SMD 157Q 106M 3 JJC 4 C29 10uF CE 35V 20 5 3X5 4 SMD 157Q 106M 3 JJC 4 C30 10uF CE 35V 20 5 3X5 4 SMD 157Q 106M 3 JJC 4 C31 10uF CE 35V 20 5 3X5 4 SMD 157Q 106M 3 JJC 4 C32 10uF CE 35V 20 5 3X5 4 SMD 157Q 106M 3 JJC 4 C33 10uF CE 35V 20 5 3X5 4 SMD 157Q 106M 3 JJC 4 C34 330u...

Page 47: ...105M 3 GJ 4 C67 1uF CE 50V 20 SM 4X5 4 157F 105M 3 GJ 4 C68 1uF CE 50V 20 SM 4X5 4 157F 105M 3 GJ 4 C69 1uF CE 50V 20 SM 4X5 4 157F 105M 3 GJ 4 C74 47uF CE 6 3V 20 5 3X6 3 SMD 157B 476M 3 JLC 4 C75 10uF CE 35V 20 5 3X5 4 SMD 157Q 106M 3 JJC 4 C76 10uF CE 35V 20 5 3X5 4 SMD 157Q 106M 3 JJC 4 C77 10uF CE 35V 20 5 3X5 4 SMD UWX1V100MCR1GB NCC 157Q 106M 3 JJC 4 C78 10uF CE 35V 20 5 3X5 4 SMD UWX1V100M...

Page 48: ...105M 3 GJ 4 C117 1uF CE 50V 20 SM 4X5 4 157F 105M 3 GJ 4 C118 1uF CE 50V 20 SM 4X5 4 157F 105M 3 GJ 4 C119 1uF CE 50V 20 SM 4X5 4 157F 105M 3 GJ 4 C122 1uF CE 50V 20 4X5 5 SMD 157F 105M 3 GJC 4 C123 1uF CE 50V 20 4X5 5 SMD 157F 105M 3 GJC 4 C124 47uF CE 6 3V 20 5 3X6 3 SMD UWP0J470MCR1GB NCC 157B 476M 3 JLC 4 C125 10uF CE 35V 20 5 3X5 4 SMD UWX1V100MCR1GB NCC 157Q 106M 3 JJC 4 C126 10uF CE 35V 20 ...

Page 49: ...150R 102K J BD 4 C164 1000pF CC 1206 630V 10 150R 102K J BD 4 C165 1000pF CC 1206 630V 10 150R 102K J BD 4 C166 1000pF CC 1206 630V 10 150R 102K J BD 4 C167 1000pF CC 1206 630V 10 150R 102K J BD 4 C350 0 1uF CC 0805 50V 10 1 2X2 0 150F 104K J BD 4 C351 0 1uF CC 0805 50V 10 1 2X2 0 150F 104K J BD 4 C352 0 1uF CC 0805 50V 10 1 2X2 0 150F 104K J BD 4 C353 0 1uF CC 0805 50V 10 1 2X2 0 150F 104K J BD 4...

Page 50: ...L5 CHOKE 3 3uH 20 5A 14X10X6 SMD 1806 3950 0 4 L6 CHOKE 3 3uH 20 5A 14X10X6 SMD 1806 3950 0 4 L7 CHOKE 3 3uH 20 5A 14X10X6 SMD 1806 3950 0 4 L8 CHOKE 3 3uH 20 5A 14X10X6 SMD 1806 3950 0 4 L200 TRANSFORMER CURRENT 180V 20A SMD PA1005 060 PULSE 1806 3977 0005 4 L201 TRANSFORMER CURRENT 180V 20A SMD PA1005 060 PULSE 1806 3977 0005 4 L202 TRANSFORMER CURRENT 180V 20A SMD PA1005 060 PULSE 1806 3977 000...

Page 51: ...400V 1A DO 214AA SMD 480U F1G0 3 4 D18 UF1G FAST REC 400V 1A DO 214AA SMD 480U F1G0 3 4 D19 UF1G FAST REC 400V 1A DO 214AA SMD 480U F1G0 3 4 D20 UF1G FAST REC 400V 1A DO 214AA SMD 480U F1G0 3 4 D21 BAV99 SOT23 PHILIPS 4840 8970 3 4 D22 1A 50V S1A DO 214AA SMD PANJIT 480S 1A00 3 4 D23 1A 50V S1A DO 214AA SMD PANJIT 480S 1A00 3 4 D24 1A 50V S1A DO 214AA SMD PANJIT 480S 1A00 3 4 D25 UF1G FAST REC 400...

Page 52: ...V18 3 4 D76 ZEN 1 2W 5V1 MMSZ5231B SOD 123 SMD 4837 5V18 3 4 D77 ZEN 1 2W 5V1 MMSZ5231B SOD 123 SMD 4837 5V18 3 4 D78 ZEN 1 2W 5V1 MMSZ5231B SOD 123 SMD 4837 5V18 3 4 D79 ZEN 1 2W 5V1 MMSZ5231B SOD 123 SMD 4837 5V18 3 4 D80 BAV99 SOT23 PHILIPS 4840 8970 3 4 D81 1N4148W SOD 123 SMD PANJIT 4801 48W0 3 4 D82 1N4148W SOD 123 SMD PANJIT 4801 48W0 3 4 D83 1N4148W SOD 123 SMD PANJIT 4801 48W0 3 4 D84 1N4...

Page 53: ...0 3 4 Q2 MMBT3904LT1G NPN 4860 3490 3 4 Q3 MMBT3904LT1G NPN 4860 3490 3 4 Q4 MMBTA92 PNP SOT23 KEC 4860 5360 3 4 Q5 MMBT3906LT1G SMD 4860 1980 3 4 Q7 MMBT3904LT1G NPN 4860 3490 3 4 Q9 MMBT3904LT1G NPN 4860 3490 3 4 Q10 N CH STW20NM50FD 20A 500V TO 247 4905 0FD0 5 4 Q11 N CH STW20NM50FD 20A 500V TO 247 4905 0FD0 5 4 Q12 N CH STW20NM50FD 20A 500V TO 247 4905 0FD0 5 4 Q13 N CH STW20NM50FD 20A 500V TO...

Page 54: ...01 0 4 U9 VOLT REG SMD POS NJM78L05UA SOT89 3132 3601 0 4 U11 VOLT REG 12V L7812ACD2T D2PAK ST 3132 4011 0 4 U12 TEMP SENS LM34DZ TO 92 RLT NATIONAL 3132 4021 0 4 U13 VOLT REG 15V NJM79L15UA SOT89 JRC 3132 3671 0 4 U14 PIC16LF873A I SOG MICRO 3132 1451 0 4 U15 CD74HC4051M96 SOIC 3132 0780 0 4 U16 VOLT REG 15V NJM78L15UA SOT89 SMD 3132 3661 0 4 U17 VOLT REG SMD POS NJM78L05UA SOT89 3132 3601 0 4 U1...

Page 55: ...T6 3A 250V 5X20 UL BOSE PART NUMBER 177311 06300 5120 0040 0 3 4 F5 FUSE 1A 250V 5X20MM UL CSA PSE VDE 5120 1070 0 3 4 F6 FUSE 1A 250V 5X20MM UL CSA PSE VDE 5120 1070 0 3 4 GRAY TERMINAL OUTPUT 4132 1551 0 4 J2 0 OHM RMG 1206 1 8W 1 4721 000J 6 4 J4 0 OHM RMG 1206 1 8W 1 4721 000J 6 4 J101 HEADER IDC 16P 2XP2 54 R ANGLE MALE 2101 3128 0 4 JP1 HEADER 1X6P P2 54 STRAIGHT MALE 2101 3125 0 4 JP1 CONNE...

Page 56: ...68 0 3 4 SW1 SW SLIDE DPDT 6A 250V R ANGLE C K 5200 4941 0 12 3 4 SW2 SW POWER DPDT 250V 10A SL14 22AM 5200 4942 0 3 4 SW3 SW POWER DPDT 250V 10A SL14 22AM 5200 4942 0 3 4 TR1 TRANSFORMER POWER TS EER28 1806 3953 0 3 4 TR2 TRANSFORMER TS EE16POWER 1806 3952 0 3 4 VIOLET TERMINAL OUTPUT 4132 1551 0 4 WHITE TERMINAL OUTPUT 4132 1551 0 4 U10 SOCKET 1X8P P2 54 ST BLK FEMALE 2113 3169 0 4 U18 SOCKET 1X...

Page 57: ... 0603 4723 1071 P 4 R105 1 0K RMG 0603 1 16W 5 4723 000J P R 4 R106 1K RMG 1 16W 1 0603 1608 4723 102A P 4 R107 1 07K RMG 1 16W 1 0603 4723 1071 P 4 R110 1K RMG 1 16W 1 0603 1608 4723 102A P 4 R111 1K RMG 1 16W 1 0603 1608 4723 102A P 4 R112 2 74K RMG 1 16W 1 0603 4723 2741 P 4 R113 2 74K RMG 1 16W 1 0603 4723 2741 P 4 R119 10 0K 4 R200 4 99K RMG 1 16W 1 0603 4723 4991 P 4 R201 20K RMG 1 16W 1 060...

Page 58: ...D 4 C105 0 01uF CC 50V 5 0603 150F 103J P AC 4 C201 47pF CC 50V 5 0603 1x2 150F 470J P AC 4 C202 0 1uF CC 50V 5 0603 150F 104J P AC 4 C203 1uF CC 50V 10 0805 150F 105K J BD 4 C204 1uF CC 50V 10 0805 150F 105K J BD 4 C205 0 01uF CC 50V 5 0603 150F 103J P AC 4 C600 0 1uF CC 250V 10 X7R 1206 1 6X3 2 150R 104K 6 CF 4 Inductors Reference Designator Description Vendor Part Number Note L1 FERRITE BEAD 4 ...

Page 59: ...558 SOT 23 SMD ZETEX 485T 5580 3 4 Q200 PNP FMMT558 SOT 23 SMD ZETEX 485T 5580 3 4 Q201 PNP FMMT558 SOT 23 SMD ZETEX 485T 5580 3 4 Integrated Circuits Reference Designator Description Vendor Part Number Note U1 CLASS T CONTROLLER TCA2002 SO 28 TRIPATH 3132 3931 0 4 U100 HALF BRIDGE DRIVER IX6R11S6 SO 18 IXYS 3132 3941 0 4 U200 HALF BRIDGE DRIVER IX6R11S6 SO 18 IXYS 3132 3941 0 4 Miscellaneous Refe...

Page 60: ...front panel Lift out the PCB 2 4 Disconnect the ribbon cable from J510 of the the Main DSP PCB 34 3 Front Panel Assembly Removal 3 1 Perform procedure 1 3 2 Remove the six screws 13 that secure the front panel 23 to the chassis 1 3 3 Depress the three tabs on one of the end caps 18 to release it from the front of the chassis Lift off the end cap Repeat this for the other end cap 3 4 Lift off the f...

Page 61: ...ng the DSP PCB A connection to chassis ground is made using these screws Ensure that the insulating washer is re installed under the screw located near connector P50 on the Main DSP PCB 5 5 Make a note of the wiring configuration and unplug the ribbon cables from J511 and J512 on the Main DSP PCB 5 6 Using needle nose pliers compress the ends of the standoffs 37 that secure the Main DSP PCB to the...

Page 62: ...CB when re installing it Failure to do so could damage the unit 8 Power Transformer Removal 8 1 Perform procedure 6 8 2 Disconnect the power transformer 14 wiring harness from the power amplifier PCB module assembly 33 8 3 Remove the bolt 17 washer 15 and spring washer 16 that secure the power transformer 14 to the chassis 1 There should also be a cup washer and rubber pad located on top of the tr...

Page 63: ...into a known state for test by first updating the unit s microcode using the Bose Installer program This resets the unit sets the EQ s and gains to the proper levels and maps the Zone 1 input to Zones 1 4 at the outputs Note Loading new host microcode will place the unit into the factory default condition and will also erase the stored unit serial number Once the update is completed the unit will ...

Page 64: ...Test 1 1 With the unit disconnected from AC mains and the power switch in the OFF position use an Ohmmeter to measure a short across the output relays for all four amplifier outputs Measure at the following points Zone 1 speaker output Measure zero ohms from Ch 1 pin 1 to pin 2 Zone 2 speaker output Measure zero ohms from Ch 2 pin 1 to pin 2 Zone 3 speaker output Measure zero ohms from Ch 3 pin 1 ...

Page 65: ...easure At Reference Designator Value pins open Value pins shorted Wallplate 1 J401A Pin 1 5 VDC 5 4 2 4 6 VDC 5 Wallplate 2 J401B Pin 1 5 VDC 5 4 2 4 6 VDC 5 Wallplate 3 J402A Pin 1 5 VDC 5 4 2 4 6 VDC 5 Wallplate 4 J402B Pin 1 5 VDC 5 4 2 4 6 VDC 5 Input Level Measure at Gain 1dB THD N 20 20 kHz Line In 1A 1B 1Vrms 0dBV Zone 1 SPKR Output 6 dB 1 Line In 1A 1B 1Vrms 0dBV Music On Hold PBX Out 0 dB...

Page 66: ...age level is now 12 VDC 5 7 Override Direct input Test 7 1 Apply a 1 kHz 1 Vrms 0dBV input to the Direct In Control jack at pins 1 and 2 J503 Hold J503 Pin 4 open and verify that no signal is present at the Zone 1 SK1 Zone 2 SK2 Zone 3 SK3 and Zone 4 SK4 speaker output jacks Reference a dB meter to the input Short J503 Pin 4 to J503 Pin 3 and verify the following 8 Contact Closure Input Test This ...

Page 67: ...uts 10 Code Revision Level Check This test displays the code revision levels for the various microcontrollers used in the 4400 amplifier This will tell the repair technician whether or not he needs to update the code before returning the unit 10 1 Launch the Bose InstallerTM software if not already open Click on the Service Hardware tab and read the installed code revision levels for Host Microcod...

Page 68: ...and out of STANDBY Switch the FreeSpace 4400 system to STANDBY and then back to ac tive again If the SYSTEM STATUS is green the system may have logged an error Check the FreeSpace 4400 Installer soft ware Error Log No Yes 1 Switch the FreeSpace 4400 sys tem to STANDBY 2 Set the POWER switch to OFF 3 Wait for STANDBY indicator to turn off 4 Set the POWER switch to ON 5 Press the STANDBY switch 1 Sw...

Page 69: ...sure an output transformer is not being saturated check to see if the correct loudspeaker EQ setting is selected If none of these actions solve the problem read the instructions in the following flow chart or check the error log using the FreeSpace 4400 Installer software Check for Shorted wiring Overdriven amplifier reduce output gain Transformer saturation Entry in FreeSpace 4400 Installer soft ...

Page 70: ...y performing audio processing and amplification During the POST test five major components of the hardware are tested Host controller The host controller moni tors and controls the operation of the FreeSpace 4400 hardware A host controller failure will cause the message Power on self test incomplete to appear in the host controller test section The failure type for a host controller is an SRAM add...

Page 71: ...leep mode high frequency sense fault and retry fault Output Status The status of the amplifier output at the time of the alarm Possible status messages are amplifier module muted and speaker relay off Fan Speed The fan speed at the time of the alarm Operating Mode The current setting of the output voltage select switch 70V or 100V Amplifier alarms using output voltage and current Reviewing the out...

Page 72: ... FreeSpace 4400 in standby mode You can check that the power has been removed from the FreeSpace 4400 or that you experienced a power dropout Sleep Mode The host microcontroller has told the amplifier and power supply to turn off This only occurs in conjunction with another alarm usually AC power fault because it in itself is not an alarm condition When an AC power dropout occurs the amplifier imm...

Page 73: ... onds and turn the POWER switch to ON Then press STANDBY on the front panel Reconnect one cable at a time and check the Error Log Common Problems Communications port error When you receive the communications port error dialog the FreeSpace 4400 Installer software was not able to locate a FreeSpace 4400 system on the COM 1 port This normally occurs due to one of three reasons The PC and FreeSpace 4...

Page 74: ...green Yes No No Yes Perform test procedures If unit passes return to customer User interface keypads do not operate correctly Check wiring of RJ 45 connectors Check for breaks shorts in cable Using the FreeSpace 4400 Installer software check the Error Log for a periph eral controller error User interface keypads exhibit strange behavior Is keypad connected to the correct ZONE on the FreeSpace 4400...

Page 75: ...ttings Yes No No Yes Verify that the loudspeakers are not being overdriven or are dam aged Verify that the total load imped ance presented to the FreeSpace 4400 output is within specified limits for the selected mode of operation Is the input signal clean at the FreeSpace 4400 input No Yes Auto Volume does not calibrate Auto Volume calibration may fail if the process cannot obtain an adequate sour...

Page 76: ...tch is on Its purpose is to supply approximately 9 volts locally regulated to 5 volts to several microprocessors and other circuitry These microprocessors respond to turn on stimuli i e power up via the 4400 s real time clock computer control or user intervention via standby switch or wall plate The TOPswitch IC performs all the functions of a complete 130 kHz SMPS flyback mode con troller and swi...

Page 77: ...assembly with two circuit boards mounted to it back to back The upper PCB contains amplifier circuitry for output zones chan nels 1 and 2 the lower PCB contains amplifier circuitry for output zones 3 and 4 plus power supply components shared by the entire unit The power amplifier module receives analog inputs and 2 way serial communications from the DSP and host processor sections via a 34 pin rib...

Page 78: ...t are too high or too low will cause the module to shut down very quickly and output a logic 1 on the module s Fault pin Protection PIC microcontroller U14 monitors amplifier functions including the Tripath s Fault pin and numerous other inputs and responds by turning the amplifier on and off by means of the Tripath s Mute pin The speakers are also disconnected under U14s control via relay K1 In o...

Page 79: ...e provided to condition the following signals for measurement via the MPX A D section via voltage across R91 Amplifier input voltage Amplifier output voltage Amplifier output current To provide repeatable reliable measurements the time constant of all these averages is ap proximately 100 mSec Bose FreeSpace Installer software uses these measurements to calculate answers to questions such as Is the...

Page 80: ...gulators The DSP board contains the 56K DSP and the 80C251 host processor along with its subordinate PIC processor for peripheral control This board also carries the audio codecs and their associated analog circuitry Two audio inputs are line level and two may be configured for 0 to 60 dB of gain The direct input bypasses the DSP and codecs and allows a signal to directly drive the amplifier syste...

Page 81: ...e microprocessor U544 serves as a peripheral controller to extend the I O capacity of the U520 The host communicates with it over the I2C bus along with the real time clock U523 Pressing the standby button on the front panel sends a signal to the PIC that is relayed to the host over the I2C interface The host then sends a wakeup signal to the power supply by lower ing a port line that is buffered ...

Page 82: ...input A PNP transistor circuit Q502 detects ground on the PTT input and switches the switchable amplifiers to the direct input while also signaling the PIC to inform the host that an override is occurring The four switchable amplifiers drive the power amplifier inputs from the selected input signal path The outputs from the switchable amplifiers also drive four channels of amplitude sense circuitr...

Page 83: ...e LEDs on the wall plates In addition there are connectors and passive protection components for the music on hold output the line 4 expan sion output and its associated control line and the control input to allow an external device to wake up the system Power is applied to the board even when the E 4 Series II is in standby and is regulated for the board and the external wall plates by a voltage ...

Page 84: ...ersion of FreeSpace 4400 Installer software that was last used to configure the system As the software acti vates the connection with the FreeSpace 4400 system a status dialog window ap pears Once the connection is made the FreeSpace 4400 front panel block diagram appears on your screen 5 Click the Save File button and save the design file to your PC This ensures that all of your settings and even...

Page 85: ...grams Figure 4 Mic Sense PCB Top Etch Board Layout Diagram Figure 5 Mic Sense PCB Bottom Etch Board Layout Diagram Figure 6 Flash Memory PCB Top Etch Board Layout Diagram Figure 7 Flash Memory PCB Bottom Etch Board Layout Diagram ...

Page 86: ... 8 Wallplate Sense PCB Top Etch Board Layout Diagram Figure 9 Wallplate Sense PCB Bottom Etch Board Layout Diagram Figure 10 AC Power Selector PCB Top Etch Board Layout Diagram Figure 11 AC Power Selector PCB Bottom Etch Board Layout Diagram ...

Page 87: ...87 Circuit Board Layout Diagrams Figure 12 DSP PCB Top Etch Board Layout Diagram ...

Page 88: ...88 Circuit Board Layout Diagrams Figure 13 DSP PCB Bottom Etch Board Layout Diagram ...

Page 89: ...Figure 14 Front Panel PCB Top Etch Board Layout Diagram Figure 15 Front Panel PCB Bottom Etch Board Layout Diagram Figure 16 TriPath Module PCB Top Etch Board Layout Diagram Figure 17 TriPath Module PCB Bottom Etch Board Layout Diagram ...

Page 90: ...90 Circuit Board Layout Diagrams Figure 18 Amplifier Upper PCB Top Etch Board Layout Diagram ...

Page 91: ...91 Circuit Board Layout Diagrams Figure 19 Amplifier Upper PCB Bottom Etch Board Layout Diagram ...

Page 92: ...92 Circuit Board Layout Diagrams Figure 20 Amplifier Power Supply Lower PCB Top Etch Board Layout Diagram ...

Page 93: ...93 Circuit Board Layout Diagrams Figure 21 Amplifier Power Supply Lower PCB Bottom Etch Board Layout Diagram ...

Page 94: ...S4A DA A1 GND VDD S1B S2B S3B S4B DB ADG409 ADG409 Truth Table ON SWITCH Al A0 EN X X 0 NONE 0 0 1 1 0 1 1 2 1 0 1 3 1 1 1 4 PAIR ADG409 Analog Multiplexer ADG452BRZ SPST Switch BLOCK DIAGRAM IN1 S1 D1 IN2 S2 D2 IN3 S3 D3 IN4 S4 D4 ADG452 SWITCHES SHOWN FOR A LOGIC 1 INPUT IN1 1 D1 2 S1 3 VSS 4 IN2 16 D2 15 S2 14 VDD 13 GND 5 VL 12 S4 6 S3 11 D4 7 D3 10 IN4 8 IN3 9 ADG452 TOP VIEW Pin Function Des...

Page 95: ...d externally to filtered VA 7 AGND Analog Ground Pin 8 VA Analog Power Supply Pin 4 75 5 25V 9 P S I Parallel Serial Mode Select Pin L Serial Mode H Parallel Mode 10 MCLK I Master Clock Input Pin 11 LRCK I Input Output Channel Clock Pin 12 BICK I Audio Serial Data Clock Pin 13 SDTO O Audio Serial Data Output Pin 14 SDTI I Audio Serial Data Input Pin CDTI I Control Data Input Pin in Serial Mode 15 ...

Page 96: ...L IN OUT CHANNEL IN OUT CHANNEL IN OUT COM OUT IN ADDRESS SELECT Block Diagram TG TG TG TG TG TG TG 3 A COMMON OUT IN BINARY TO 1 OF 8 DECODER WITH ENABLE 11 10 9 6 E S2 S1 S0 LOGIC LEVEL CONVERSION 8 7 GND VEE 16 VCC 13 14 15 12 1 5 2 4 A7 A6 A5 A4 A3 A2 A1 A0 CHANNEL IN OUT TG TRUTH TABLE HC HCT4051 INPUT STATES ON CHANNELS ENABLE S2 S1 S0 L L L L A0 L L L H A1 L L H L A2 L L H H A3 L H L L A4 L...

Page 97: ...ction L L H DATA OUT Read Data L X L DATA IN Write Data L H H High Z Output Disabled H X X High Z Deselected Standby Integrated Circuit Diagrams LD1086D2T33 Regulator Pin connections top view D2 PAK Note The TAB is physically connected to the Output LM34 Temp Sensor Pinout Diagram TO 92 LM34DZ SN74HC14D Hex Schmitt Trigger Inverter FUNCTION TABLE each inverter INPUT A OUTPUT Y H L L H LOGIC SYMBOL...

Page 98: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 I O0 I O1 I O2 GND VCC WE A13 A8 A9 A11 OE A10 CE I O7 I O6 I O5 I O4 I O3 PIN CONFIGURATION 28 Pin DIP and SOJ PIN DESCRIPTIONS A0 A14 Address Inputs CE Chip Enable Input OE Output Enable Input WE Write Enable Input I O0 I O7 Bidirectional Ports Vcc Power GND Ground TRUTH TABLE Mode WE WE WE...

Page 99: ...ge Low side power supply This power supply provides power for both outputs Voltage range is from 4 5 to 25V LGO Output Low side driver output LS Ground Low side return IX6R11S6 HIN Low to High VDD DG HIN HIN OUT IN RST VDD HIN LIN ENB DG 1 Ω DG VCH UVCC Isolated High Side HS 4A Gate Driver VCL HS HGO VCH VCL Low to High Side Delay Equalizer and Shutdown Shutdown Logic LS UVCC Detect LS LGO 4A Gate...

Page 100: ...100 TC9459F Volume Control PINOUT DIAGRAM BLOCK DIAGRAM PIN DESCRIPTION Integrated Circuit Diagrams ...

Page 101: ...are RCO QA QB QC QD QE QF QG QH QA to QH INTERNAL OUTPUTS OF THE COUNTER PIN No SYMBOL NAME AND FUNCTION 1 2 3 4 5 6 7 15 QA to QH Outputs 11 CCK Counter Clock Input 12 CCKEN Counter Clock Enable Input 13 RCK Register Clock Input 9 RCO Ripple Carry Output 14 G Output Enable Input 10 CCLR Counter Clear Input 8 GND Ground 0V 16 VCC Positive Supply Voltage INPUTS OUTPUT G RCK CCLR CCKEN CCK H X X X X...

Page 102: ...rate 15 REF Internal reference voltage approximately 1 0 VDC Connect and 8 25kΩ 1 to AGND 17 VNNSENSE Negative supply voltage sense input This pin is used for both over and under voltage sensing for the VNN supply 18 OVRLDB A logic low output indicates the input signal has overloaded the amplifier 19 VPPSENSE Positive supply voltage sense input This pin is used for both over and under voltage sens...

Page 103: ... common and reference point C D S S S S M G Package SMD 8B 8 5 7 1 4 2 3 Pin Functional Description DRAIN D Pin High voltage power MOSFET drain output The internal start up bias current is drawn from this pin through a switched high voltage current source Internal current limit sense point for drain current CONTROL C Pin Error amplifier and feedback current input pin for duty cycle control Interna...

Page 104: ...depending on the values of bits RD0 and RD1 in UCONFIG0 byte A16 O 17th Address Bit Output to memory as 17th external address bit A16 in extended bus applications depending on the values of bits RD0 and RD1 in UCONFIG0 byte A15 8 1 O Address Lines Upper address lines for the external bus AD7 0 1 I O Address Data Lines Multiplexed lower address lines and data for the external memory ALE O Address L...

Page 105: ...I O Timer 2 Clock Input Output For the timer 2 capture mode T2 is the external clock input For the Timer 2 clock out mode T2 is the clock output T2EX I Timer 2 External Input In timer 2 capture mode a falling edge initiates a capture of the timer 2 registers In auto reload mode a falling edge causes the timer 2 register to be reloaded In the up down counter mode this signal determines the count di...

Page 106: ...106 SERVICE MANUAL REVISION HISTORY Date Revision Level Description of Change Change Driven By Pages Affected 1 08 00 Document released at revision 00 Service manual initial release All ...

Page 107: ...SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE Bose Corporation The Mountain Framingham Massachusetts USA 01701 P N 294963 SM Rev 00 1 2008 P http serviceops bose com ...

Reviews:

No comments