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CONTENTS
Safety Information ............................................................................................................................2 Electrostatic Discharge Sensitive (ESDS) Device Handling .........................................................2 Warranty .............................................................................................................................................2 Specifications ................................................................................................................................ 3-4 Theory of Operation ..................................................................................................................... 4-6 Figure 1. LifestyleŽ SA-1 Amplifier Block Diagram ............................................................................7 Disassembly/Assembly Procedures ...............................................................................................8 Test Procedures .......................................................................................................................... 9-14 Figure 2. Test Setup Diagram .......................................................................................................... 10 Figure 3. Later Unit Test Setup Diagram ......................................................................................... 14 Figure 4. J3 DIN Connector Pinout Diagram .................................................................................. 14 Part List Notes ................................................................................................................................. 14 Main Part List, LifestyleŽ SA-1 Amplifier (see Figure 5) .............................................................. 15 Figure 5. LifestyleŽ SA-1 Amplifier Exploded View .......................................................................... 15 Electrical Part List ..................................................................................................................... 16-20 Figure 6. LifestyleŽ SA-1 Amplifier Rear Panel Views ..................................................................... 20 Packaging Part List, LifestyleŽ SA-1 Amplifier (see Figure 7) .................................................... 21 Figure 7. LifestyleŽ SA-1 Amplifier Packaging View ........................................................................ 21 Integrated Circuit Diagrams ..................................................................................................... 22-24 Figure 8. LifestyleŽ SA-1 Amplifier PCB Rev. 0 and 01 Topside Component and Etch Diagram..... 25 Figure 9. LifestyleŽ SA-1 Amplifier PCB Rev. 0 SMD Etch and Component Layout Diagram ........ 26 Figure 10. LifestyleŽ SA-1 Amplifier PCB Rev. 1 SMD Etch and Component Layout Diagram ...... 27
CAUTION: The BoseŽ LifestyleŽ SA-1 amplifier contains no user-serviceable parts. To prevent warranty infractions, refer servicing to warranty service stations or factory service.
PROPRIETARY INFORMATION THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF BOSE CORPORATION WHICH IS BEING FURNISHED ONLY FOR THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT BY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF THE BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED FOR ANY OTHER PURPOSE. 1
SAFETY INFORMATION
1. Parts that have special safety characteristics are identified by the symbol on schematics or by special notes on the parts list. Use only replacement parts that have critical characteristics 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. Refer to Paragraph 84 of UL1270. Use the following checks to perform these measurements: A. Leakage Current Hot Check-With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. (Do not use an isolation transformer during this test.) Use a leakage current tester or a metering system that complies with American National Standards Institute (ANSI) C101.1 "Leakage Current for Appliances" and Underwriters Laboratories (UL) 1492 (71). 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 0.5 milliamp. Reverse the unit power cord plug in the outlet and repeat test. ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE UNIT TO THE CUSTOMER. B. Insulation Resistance Test Cold Check-(1) Unplug the power supply and connect a jumper wire between the two prongs of the plug. (2) Turn on the power switch of the unit. (3) Measure the resistance with an ohmmeter between the jumpered AC plug and each exposed metallic cabinet part on the unit. When the exposed metallic part has a return path to the chassis, the reading should be between 1 and 5.2 Megohms. When there is no return path to the chassis, the reading must be "infinite". 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.
ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) DEVICE HANDLING
This unit contains ESDS devices. We recommend the following precautions when repairing, replacing or transporting ESDS devices: ˇ Perform work at an electrically grounded work station. ˇ Wear wrist straps that connect to the station or heel straps that connect to conductive floor mats. ˇ Avoid touching the leads or contacts of ESDS devices or PC boards even if properly grounded. Handle boards by the edges only. ˇ Transport or store ESDS devices in ESD protective bags, bins, or totes. Do not insert unprotected devices into materials such as plastic, polystyrene foam, clear plastic bags, bubble wrap or plastic trays.
WARRANTY
The Bose Lifestyle SA-1 amplifier is covered by a limited one year warranty
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2
ELECTRICAL SPECIFICATIONS
Voltage Variations: US: International: Dual Voltage: 120 Vrms 220-240 Vrms 115/230 Vrms switchable 40 Watts minimum into 4 Ohms @ < 0.2% THD, 20 Hz to 15 kHz +/- 0.5 dB, 20 Hz - 15 kHz (at full volume) Maximum boost 13dB @ 60 Hz (-35 dB vol.)
Maximum Power:
Frequency Response: Dynamic Equalization: (see figure at right)
Voltage Gain (at 1 kHz): Input Impedance at (at 1 kHz): Signal to Noise Ratio: Input Sensitivity:
34 dB 10k Ohms (resistive) 93 dB typical 0.25 Vrms at full volume produces rated output power Range: Attack Time: Release Time: 80 dB < 1 dB/ms > 1 dB/10 ms 1 second maximum at initial turn-on 0.2 second maximum from standby 0 to -80 dB in 1 dB steps < 50 mVdc +/- 1.0 dB Infinite (with no damage) < 3 Watts < 10 Watts 150 Watts 3
Compressor:
Turn-On Delay (to unmute):
Volume Control Range: Output DC offset: Channel Balance: Output Short Duration: Standby Power Consumption: Quiescent Power Consumption: Maximum Power Consumption:
MECHANICAL SPECIFICATIONS
Size: Weight: Shipping Weight: Amplifier Assembly: Housing: Bottom: Finish: 14.3 x 5.2 x 4.0 inches (36.3 x 13.2 x 10.2 cm) 9.25 lbs (4.20 kg) 6.45 lbs (2.93 kg) Die cast aluminum (A360) 22 Ga. steel plate Textured black powdercoat Power switch (International version only) Voltage select switch (Dual Voltage version only)
Enclosure Material:
Controls:
THEORY OF OPERATION
General Information: The Bose Lifestyle SA-1 amplifier is a zone 2 accessory to the Bose Lifestyle systems. Lifestyle Systems that use a CD-5 or a CD-20 music center require an additional RF remote control in order to operate the second zone. This is because the dip switches located in the remote control must be set differently to control zone 2 (see page 9 of this manual). If the zone 2 remote is not set up as required and the Lifestyle amplifier is not connected to the zone 2 output of the Lifestyle music center, it will not operate with the Lifestyle system. Lifestyle systems that use a PMC/MRI (such as the Lifestyle 40 and 50) do not require an additional remote control. Note: The circuit operation described below is for the left channel. The right channel operation is identical. The designators inside the brackets are schematic sheet grid locations. Refer to schematic sheet 1 for the following information. The rear panel of the Lifestyle amplifier utilizes two different types of audio input jacks, RCA and DIN. These jacks, along with the reversible audio input cable, part number 197406 supplied with the amplifier, allow the use of the different Lifestyle music centers. If you are using a CD-5 music center, the audio input cable's RCA plugs connect into the fixed output jacks of music center and the serial data plug connects into the serial data jack 2 on the music center. The other end of the cable connects into the DIN jack at J3 [C4] on the amplifier rear panel. If you are using a CD-20 or a PMC/MRI, then the DIN plug on the reversible audio input cable connects into the zone 2 (or 3 or 4 for the MRI) DIN jack on the back of the CD-20 or MRI. The RCA plugs at the other end would then connect into the RCA at J1 jacks [B4 and D4] on the rear panel of the Lifestyle amplifier. The serial data plug would connect to J2 [C4] on the amplifier rear panel.
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THEORY OF OPERATION
Power Supply Circuitry: Refer to schematic sheet 2 for the following information. AC mains voltage enters the amplifier PCB through J6 [B1], passes through switch S2 [B2] (used on 220-240V units only), fuse F1 [B2], out J7 [B1] to the power transformer. Note: Switch S1 [B2] is used on dual-voltage units only. The AC output of the power transformer is fed back to the amplifier PCB at J5 [B4], where it is sent to bridge rectifier Z1 [B4] and a bridge rectifier made up of diodes D3, D4, D7 and D8 [C4]. The output of this bridge rectifier is filtered by C3 and C4 to form the + and 34Vdc supplies used by the power amplifier ICs U13 [C3] and U14 [C2]. The output of bridge rectifier Z1 is tapped off for the + 17Vdc [B3] and 17Vdc [B3] supplies and sent to be filtered by C8 and C184. It is then sent to regulators U11 and U12 [B3]. The output of U11 at pin 1 supplies the +8Vdc supply, which is also sent through R7 to Reset IC U3 [B2]. The output of U3 is used to control the conduction of passthru transistor Q6 [C2]. When Q6 is conducting, it takes the +8Vdc on its collector and regulates it to +5Vdc on its emitter. This +5Vdc is used as a supply voltage by the micro U7 [B3 sheet 1]. This is done in the event of a power interrupt problem with the amplifier. With U3 and Q6, the +5Vdc used by the micro is turned back on in a controlled manner, preventing possible operational problems resulting from the way the micro was brought back into operation after the event. U12's output at pin 3 supplies the regulated 8Vdc used by the amplifier. Volume and Control Circuitry: Refer to schematic sheet 1 for the following information. The amplifier's volume level can be controlled either by the head unit by means of the serial data input or by a 10k Ohm wall-mounted volume control potentiometer, Bose product code 21540 (white) or 21541 (ivory), as used in some residential installations. This requires the use of a Lifestyle SA-1 adapter, product code 26229, that places the wall pot across pins 1 and 2 of DIN connector J3 [C4]. The serial data information from the head unit enters the amplifier through either the DIN jack J3 pin 7 [C4] or the serial data jack J2 pin 2 [C4]. This serial data information is carried to the microcontroller U7 [B3] at pin 2. When the micro receives serial data at pin 2, it causes output pulses at pins 6 (CLOCK) and 7 (DATA). These pulses are applied to the volume control IC U5 [C2] at pins 4 and 5 and cause U5 to change the volume level accordingly. The serial data information also causes an output from the micro at pin 5. It supplies the MUTE and STBY signals for the output power amplifiers. In the quiescent state, there is a logic low (~0V) on pin 5 of the micro. When serial data is received, a logic high (+5V) is seen at pin 5. This causes a +5V to be seen as STBY at D11's cathode [B3] followed about 200 milliseconds later by a +5V at the MUTE output at D11's anode. These two signals are sent to the power amplifiers [C3/C2 sheet 2], which causes them to unmute. If a wall-mounted potentiometer is used in the installation, it is connected between pins 1 and 2 of DIN jack J3. Q5 [A4] and its associated circuitry form a ramp oscillator circuit (known as the pot encoder circuit) whose pulse repetition rate is varied by the resistance value of the setting of the potentiometer in parallel with resistor R1 [C4].
5
THEORY OF OPERATION
Volume and Control Circuitry (continued): Here is the circuit operation in detail: When a potentiometer is present across pins 1 and 2 of J3, a current flows from the +8Vdc through R25, the pot, R30 and Q5, charging C15. Pin 7 of U6 is normally at ~+8Vdc. A voltage divider is set up through ˝ of D6, R40 and R35, which sets U6 pin 5 to ~+5Vdc. When C15 charges to +5Vdc, U6 conducts and toggles pin 7 to ~ -8Vdc. When this happens, the upper ˝ of D6 (connected to R40) cuts off and the lower ˝ of D6 is turned on. C15 rapidly discharges through R37 and the whole cycle is repeated. Depending on the resistance value of the pot, the pulse repetition rate (PRR) will vary from ~10msec to ~110msec. This is reported to the micro U7 pin 3 through R39 and processed by the firmware to send DATA and CLOCK pulses to pins 4 and 5 of the volume control IC U5 [C2] to make a corresponding change in the volume level. R36 [A4] provides positive feedback to prevent circuit latch-up. With no pot present, U7 pin 3 should be ~+5vdc. Audio Signal Path: Refer to schematic sheet 1 for the following information. The audio signal is applied to the amplifier through the RCA jacks at J1 [B/D4] or the DIN jack at J3 nd [C4]. It is applied to U1 [D3] at pin 2 and goes through a unity gain differential amplifier with a 2 order high pass filter centered at 42Hz. The signal is then applied to U5 [C2] pin 18. U5 sets the attenuation level depending on commands received at pins 4 (DATA) and 5 (CLOCK) from the micro U7 [B4]. The signal then comes out of U5 at pin 2 and passes through a stage of amplification at U6 [C1] pin 2. This stage is where most of the amplification takes place, and has a gain of about 22.3 dB. At the output of U6 at pin 1, the audio signal is sensed by the clip detect circuit at U8 [B1] pin 6. Under normal gain conditions resistors R26 and R27 set a reference voltage at their junction of about +6.8Vdc. This results in a voltage of about 8Vdc at U8 pins 1 and 7, which is seen as a logic high (~5Vdc) at the junction of R31 and R47 which is fed to the micro at pin 4. If the audio signal is at too high a level, it will trip window comparator U8 and cause a logic low (0V) output to the micro at U7 pin 4, which in turn will cause the micro to tell the volume control IC U5 to decrease the gain level. Also feeding the window comparator circuit is an input from the thermal overload circuit, composed of Q7 [B1], RT2 and its associated components. RT2 is a negative coefficient thermistor. When RT2 heats up, it decreases its resistance value, placing more of a positive voltage at Q7's base, causing it to conduct and pulling the 6.8V reference at the junction of R26 and R27 lower, causing the compressor to activate sooner and reducing amplifier output. As a result, pin 4 of the micro is pulled low, causing the micro to send out CLOCK and DATA pulses to volume control IC U5 to decrease the volume level. The output at U6 pin 1 is then sent to the left channel power amplifier IC U13 [C3 sheet 2]. Pins 12 and 19 of U5 feed the dynamic EQ circuit, composed of ź of U6 pins 8, 9 and 10 and its associated components. This circuit varies the level of the non-inverting input signal to the left and right channel op-amp sections at pins 3 and 12 of U6. This varies the gain of the stage dependant on the input frequency in order to perform the desired dynamic equalization function. It provides low frequency boost (up to 13 dB @ 60 Hz) at low volume settings. Once all of these various functions are performed, the audio signal is sent to the power amplifier U13 [C3 sheet 2] for a gain increase of about 12.2 dB and output to the loudspeakers at J4 [C3 sheet 2] pins 2 and 4.
6
Left Input
Diff amp
High Pass Filter
Volume Control
Diff amp
Power Amplifier
Left Output 4 Ohms
Heatsink Over-temp
Dynamic EQ (BPF)
Clip Detect
Right Input
Diff amp
High Pass Filter
Volume Control
Diff amp
Power Amplifier
Right Output 4 Ohms
Serial Data Input External Volume Pot
Micro Mute Voltage Select 120/240V Power Supply
AC Mains
PWR XFMR
Figure 1. LifestyleŽ Amplifier Block Diagram
7
DISASSEMBLY/ASSEMBLY PROCEDURES
Note: Refer to Figure 5 for the following procedures. 1. PCB Assembly and Transformer Removal 1.1 On the rear panel of the amplifier housing (1), remove the four phillips-head screws that secure the rear panel jacks to the amplifier housing. 1.2 Remove the six torx-head screws (8) that secure the bottom panel (7) to the amplifier housing. Lift off the bottom panel. Note: The transformer is secured to the amplifier housing by four of these screws. 1.3 Remove the three torx-head screws (8) that secure the IC pressure bar (5) to the amplifier housing. Lift off the pressure bar. 1.4 Remove the four torx-head screws (8) that secure the PCB assembly (4) to the amplifier housing. 1.5 Lift the PCB assembly up and out of the amplifier housing, making sure that the rear panel connectors clear the housing. 1.6 Lift the transformer (6) out of the amplifier housing. 1.7 Make a note of how the transformer is plugged into the PCB assembly and remove the two transformer cables from the PCB assembly jacks at J6 and J7. Note: The 120V variation uses only pins 1 and 2 of jack J7. The red lead connects to pin 1 and the black lead connects to pin 2. 2. PCB Assembly and Transformer Replacement 2.1 Refer to the note made in step 1.7 and plug the two transformer cables onto the PCB assembly at jacks J6 and J7. 2.2 Align the transformer (6) with the amplifier housing (1) and set it in place. 2.3 Check that the insulating sil-pads are properly aligned on the heatsink. Rotate the PCB assembly (4) so that the SMD side of the board faces up. Slide the board into the amplifier housing. Make sure that the PCB assembly connectors align with the holes in the rear panel of the amplifier housing. 2.4 Secure the bottom of the PCB assembly to the amplifier housing using the four torxhead screws (8) removed in step 1.4. 2.5 Secure the PCB assembly jacks to the rear panel of the amplifier housing using the four phillips-head screws removed in step 1.1. 2.6 Make sure that there is sufficient thermal compound on the output devices. Place the IC pressure bar (5) over the output devices and secure it in place using the three torx-head screws (8) removed in step 1.3. 2.7 Make sure that the transformer is properly aligned in the amplifier housing and place the bottom plate (7) on the bottom of the amplifier housing. 2.8 Secure the bottom plate to the amplifier housing using the six torx-head screws removed in step 1.2.
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TEST PROCEDURES
General Information The BoseŽ LifestyleŽ SA-1 amplifier is a zone 2 accessory to the LifestyleŽ systems. The amplifier is provided with a reversible input audio cable which allows connection to a CD-5, CD-20 or LifestyleŽ 40 or 50 Multiroom interface (MRI) module. When used with the CD-5 and CD-20, a second remote control must be purchased and set up for zone 2 operation by the customer. See the remote control setup instructions below. Note: The remote control setup information for the RC-20 and PersonalTM Music Center remote controls is for informational purposes only, and not for use with the following tests. Zone 2 Remote Control Setup Instructions RC-5 (used with CD-5 head unit): Remove the remote control battery cover and locate the miniature (DIP) switches. Make sure that the house code settings (switches 1, 2, 3 and 4) match those in your first (zone 1) remote. Slide switch 5 down (off). ˇ Slide switch 6 up (on). Changing the house code on the CD-5 head unit: Note: Change the house code of the CD-5 head unit ONLY if necessary to allow the remote to control the head unit using the steps below. Slide open the remote's battery compartment door. Change the position of dip switches 2, 3 and 4 ONLY to the new positions. Press the OFF button on the CD-5 Music Center. Press the STORE button (located under the CD door) on the head unit. The display will blink "--". Press any of the buttons on the remote control while the display is blinking. The display will stop blinking and momentarily display "--" indicating the CD-5 Music Center has been programmed to the new house code setting. 9 RC-20 (used with CD-20 head unit): Remove the remote control battery cover and locate the DIP switches. Make sure that the house code settings (switches 1, 2, 3 and 4) match those in your first (zone 1) remote. Slide switch 5 down (off). Slide switch 6 up (on). Slide switch 8 up (on). Changing the house code on the CD-20 head unit: ˇ Slide open the remote's battery compartment door. ˇ Change the position of dip switches 1, 2, 3 or 4 ONLY to the new positions. ˇ Lift the Music Center door. ˇ Turn both zones off. ˇ Press and hold the STORE key. The display will flash PROGRAM. ˇ While you hold the STORE key and the display is flashing, press any key on the remote control. The display stops flashing and momentarily shows PROGRAM to confirm recognition of a new house code. The system verifies the house code by lighting four rectangles corresponding to the four switch positions (up or down). ˇ Release the STORE key. The system remains off. Personal Music Center (LS-40/50 head unit): Systems that have a Multi-room Interface are controlled by the Personal Music Center which requires no internal switch settings to control more than one room of speakers. The Personal Music Center allows you to control up to four rooms of Bose powered speakers placed in individual rooms. These rooms are referred to as room A, B, C and D, with room A being the primary room (the one used for a one-room system). If two or more rooms are connected to your system, the Personal Music Center displays the ROOM and HOUSE buttons, and room indicators (A, B, C and/or D). See the figure on the next page for an example display for a two-room system.
TEST PROCEDURES
This will allow the CD-5 to control the LifestyleŽ amplifier while still allowing a controlled test input signal through the RCA jacks for testing. 4. Connect the appropriate value load resistor to the left and right speaker outputs for the tests you are performing. Test Setup Parameters Note: For tests 1 through 5, 10 and 11, you may use the 2k Ohm, 1/4 Watt resistors listed below for load resistors. This will allow you to test a LifestyleŽ SA-1 circuit board on the bench without it being installed into the heatsink. Tests 6 through 9 MUST be performed with the circuit board installed in the heatsink to allow proper cooling of the output devices during test. If the circuit board is tested at high power without being installed in the heatsink the output devices will automatically reduce the output level and go into thermal protect mode. To perform these tests, you will need the following equipment: An audio signal generator A CD-5 head unit with a remote control set up for zone 2 use (see page 9). 2 - 2k Ohm, 1/4 Watt resistors 2 - 4 Ohm, 50 Watt load resistors A LifestyleŽ amplifier audio input cable, part number 197406. Set up the unit under test as shown in Figure 2 and described below. 1. Connect the RCA jacks on the audio input cable to the audio signal generator. DO NOT connect them to the CD-5 head unit. 2. Plug the 8 pin DIN connector at the other end of the audio input cable into the DIN jack at J3 on the rear panel of the LifestyleŽ amplifier. 3. Plug the 3.5mm serial data jack into the rear panel of the CD-5 head unit into the System Control 2 jack.
L R
audio input cable RCA jacks
Audio Signal Generator
audio input cable
Load Resistor
connect 3.5mm plug to CD-5 serial data 2 jack
CD-5 head unit
Load Resistor
connect input to DIN connector
LifestyleR SA-1 Amplifier
Figure 2. Test Setup Diagram 1. Reference Gain and Frequency Response Tests 1.1 Set up the unit under test as shown in Figure 2. Use the 2k Ohm, 1/4 Watt resistors for load resistors. 1.2 Apply AC mains to the unit under test. 1.3 Using the zone 2 remote control, power up the head unit, select the AUX function and hold down the volume up button for at least 10 seconds. This will ensure that the LifestyleŽ amplifier is set for maximum gain. 1.4 Apply a 200 mVrms, 1 kHz signal to the left and right RCA audio input jacks at J1. 1.5 Reference a dB meter to the input signal.
10
TEST PROCEDURES
1.6 Measure the output levels at the left and right output jacks at J4. They should be +34.2 dB, +/- 1.5 dB. 1.7 Reference a dB meter to the output level. 1.8 Change the signal generator frequency to 20 Hz. Measure the left and right output levels at the left and right speaker output jacks at J4. They should be -16.2 +/- 1.5 dB (10 Hz to 30 kHz bandwidth). 1.9 Change the signal generator frequency to 20 kHz. Measure the left and right output levels at the left and right speaker output jacks at J4. They should be -3.3 +/- 1.5 dB (10 Hz to 30 kHz bandwidth). 2. Dynamic Equalization Test 2.1 Set up the unit under test as shown in Figure 2. Use the 2k Ohm, 1/4 Watt resistors for load resistors. 2.2 Apply AC mains to the unit under test. 2.3 Using the zone 2 remote control, power up the head unit, select the AUX function and press the volume up button for at least 10 seconds. This will ensure that the LifestyleŽ amplifier is set for maximum gain. 2.4 Apply a 500 mVrms, 1 kHz signal to the left and right RCA input jacks at J1. 2.5 Reference a dB meter to the input level. 2.6 Measure the output level. It should be +34.2 dB +/- 1.5 dB. 2.7 Press the volume down button until the output level is reduced by approximately 28 dB from the level measured in step 2.6. 2.8 Measure the output levels at the left and right speaker output jacks at J4. They should be +6.6 dB +/- 3.0 dB. 2.9 Change the signal generator input frequency to 60 Hz. 11 3.6 The DC offset voltage should be < 10 mVdc for both channels. 4. Output Noise Test 4.1 Set up the unit under test as shown in Figure 2. Use the 4 Ohm, 50 Watt resistors for load resistors. 4.2 Short the left and right RCA input jacks at J1. 4.3 Apply AC mains to the unit under test. 4.4 Using the zone 2 remote control, power up the head unit, select the AUX function and press the volume up button for at least 10 seconds. This will ensure that the LifestyleŽ amplifier is set for maximum gain. 4.5 With no input signal applied, measure the noise levels at the left and right speaker output jacks at J4. They should both read < 330 uVrms, A-weighted. 2.10 Measure the output levels at the left and right speaker output jacks at J4. They should be +9.5 dB +/- 1.5 dB. 3. DC Offset Test 3.1 Set up the unit under test as shown in Figure 2. Use the 4 Ohm, 50 Watt resistors for load resistors. 3.2 Short the left and right RCA input jacks at J1. 3.3 Apply AC mains to the unit under test. 3.4 Using the zone 2 remote control, power up the head unit, select the AUX function and press the volume up button for at least 10 seconds. This will ensure that the LifestyleŽ amplifier is set for maximum gain. 3.5 With no AC signal applied, measure the DC offset voltage at the left and right speaker output jacks at J4.
TEST PROCEDURES
5. Small Signal Distortion Test 5.1 Set up the unit under test as shown in Figure 2 or 3, as applicable. Use the 4 Ohm, 50 Watt resistors for load resistors. 5.2 Apply AC mains to the unit under test. 5.3 Using the zone 2 remote control, power up the head unit, select the AUX function and hold down the volume up button for at least 10 seconds. This will ensure that the LifestyleŽ amplifier is set for maximum gain. 5.4 Apply a 21 mVrms, 8 kHz signal to the left and right RCA input jacks at J1. This input will provide an output level of 0.1 Watts per channel. 5.5 Measure the THD + noise (400 Hz to 30 kHz bandwidth) levels at the left and right channel speaker output jacks at J4. 5.6 The distortion levels should be < 0.2% for both channels. 6. Large Signal Distortion Test 6.1 Set up the unit under test as shown in Figure 2. Use the 4 Ohm, 50 Watt resistors for load resistors. 6.2 Apply AC mains to the unit under test. 8.3 Apply AC mains to the unit under test. 6.3 Using the zone 2 remote control, power up the head unit, select the AUX function and hold down the volume up button for at least 10 seconds. This will ensure that the LifestyleŽ amplifier is set for maximum gain. 6.4 Apply a 220 mVrms, 1 kHz signal to the left and right RCA input jacks at J1. This input will provide an output level of 30 Watts per channel. 6.5 Measure the THD + noise (400-30 kHz bandwidth) levels at the left and right channel speaker output jacks at J4. 6.6 The distortion levels should be < 0.2% for both channels. 12 8.4 Using the zone 2 remote control, power up the head unit, select the AUX function and hold down the volume up button for at least 10 seconds. This will ensure that the LifestyleŽ amplifier is set for maximum gain. 8.5 Apply a 200 mVrms, 1 kHz signal to the left RCA input jack only. 8.6 Reference a dB meter to the left channel input. 8.7 Measure the output level at the right channel speaker output jack at J4. It should be < -30 dB. 7. Compressor Test 7.1 Set up the unit under test as shown in Figure 2. Use the 4 Ohm, 50 Watt resistors for load resistors. 7.2 Apply AC mains to the unit under test. 7.3 Using the zone 2 remote control, power up the head unit, select the AUX function and hold down the volume up button for at least 10 seconds. This will ensure that the LifestyleŽ amplifier is set for maximum gain. 7.4 Apply a 600 mVrms, 1 kHz signal to the left and right RCA input jacks at J1. 7.5 Measure the THD + noise (400-30 kHz bandwidth) levels at the left and right channel speaker output jacks at J4. 7.6 The distortion levels should be < 6.0% for both channels. 8. Channel Separation Test 8.1 Set up the unit under test as shown in Figure 2 with the exceptions noted below. Use the 2k Ohm, 1/4 Watt resistors for load resistors. 8.2 Short the right RCA input jack at J1.
TEST PROCEDURES
8.8 Short the left RCA input jack at J1. 8.9 Apply a 200 mVrms, 1 kHz signal to the right RCA input jack only. 8.10 Reference a dB meter to the right channel input. 8.11 Measure the output level at the left channel speaker output jack at J4. It should be < -30 dB. 9. Thermal Overload Compressor Test 9.1 Remove the main circuit board from the heatsink using disassembly/assembly procedure 1. Leave the power transformer connected so that you can power up the board on the bench. 9.2 Set up the unit for test as shown in Figure 2. Be sure to place the main circuit board on a non-conducting surface. Use the 2k Ohm, 1/4 Watt resistors for load resistors. 9.3 Temporarily short thermistor RT2. This will simulate heatsink thermal overload. CAUTION: Dangerous voltages are present when operating the amplifier outside of the heatsink. Use care to avoid coming in contact with these voltages. 9.4 Apply AC mains to the amplifier. Apply a 200 mVrms, 1 kHz signal to the left and right RCA input jacks at J1. 9.5. Using the zone 2 remote control, power up the head unit, select the AUX function and hold down the volume up button for at least 10 seconds. This will ensure that the LifestyleŽ amplifier is set for maximum gain. 9.6 Measure the output levels at the left and right speaker output jacks at J4. They should be < 2.5 Vrms. 9.7 Remove the temporary short across thermistor RT2 applied in step 9.3. 9.8 Reassemble the transformer and the main circuit board into the heatsink using disassembly/assembly procedure 2. 10. Remote Volume Control Test Note: This test can only be performed on units built after February 1st 2001. It will not work on units built before this date. The date of manufacture (DOM) for the amplifier is encoded into the serial number located on the label on the bottom of the unit. The actual date code is the portion of the serial number that is underlined. For example, the above date, February 1st 2001, could be seen on the label as SN: 022562E10320292AC. The portion underlined is 1032, that is the 32nd day of 2001. Note: In order to perform the following test using the potentiometer, you may need to turn the volume knob fully CCW, then fully CW with AC mains and signal applied to the amplifier to get it to pass a signal. The micro needs to see this change in order to un-mute the amplifier when using the potentiometer. To perform these tests you will need the following equipment: ˇ An audio signal generator ˇ 2 - 4 Ohm, 50 Watt load resistors. ˇ 2 - 2k Ohm, 1/4 Watt load resistors. ˇ 1 - 10k Ohm potentiometer, BoseŽ part number 187491. Set up the unit under test as shown in Figure 3 and described below. 1. Connect the RCA input jacks on the LifestyleŽ amplifier to the audio signal generator. 2. Insert the leads from the 10k Ohm potentiometer into pins 1 and 2 of the LifestyleŽ amplifier DIN input jack. See Figure 4. You may need to tack-solder some small diameter leads onto the potentiometer leads to fit into the DIN jack holes without damaging the jack. 3. Connect the appropriate value load resistor to the left and right speaker outputs for the tests you are performing.
13
TEST PROCEDURES
Load Resistor
10.1 Set up the unit under test as shown in Figure 3. Use the 2k Ohm, 1/4 Watt resistors for load resistors. 10.2 Apply AC mains to the unit under test. 10.3 Apply a 200 mVrms, 1 kHz signal to the left and right RCA audio input jacks at J1. 10.4 Turn the remote volume control to full volume (fully clockwise). 10.5 Reference a dB meter to the input signal.
L R
Audio Signal Generator
Load Resistor
10k Ohm Volume Pot
Lifestyle Amplifier
R
Figure 3. Later Unit Test Setup Diagram
8 PIN DIN CONNECTOR
10.6 Measure the output levels at the left and right output jacks at J4. They should be +34.2 dB, +/- 1.5 dB. 10.7 With the input signal in step 10.6 still applied, slowly turn the remote volume control to minimum volume (fully counterclockwise) until the output level reads 0.0 dB for both channels. 10.8 With the input signal in step 10.6 still applied, slowly rotate the remote volume control to full volume (fully clockwise). 10.9 Verify that the output level is once again +34.2 dB, +/- 1.5 dB for both channels.
8 5 2
7 4 1
6 3
BOTTOM
Figure 4. J3 DIN Connector Pinout Diagram
PART LIST NOTES
1. This part is not normally available from Customer Service. Approval from the Field Service Manager is required before ordering. 2. The individual parts located on the PCBs are listed in the Electrical Part List. 3. This part is critical for safety purposes. Failure to use a substitute replacement with the same safety characteristics as the recommended replacement part might create shock, fire and/or other hazards.
14
MAIN PART LIST
LifestyleŽ Amplifier (see Figure 5)
Reference Designator 1
Description HOUSING, AMPLIFIER, 120V HOUSING, AMPLIFIER, 230V HOUSING, AMPLIFIER, DUAL VOLT FOOT, RUBBER, PRESS FIT TAPE, PAD, CONDUCTIVE, THERMAL PCB ASSY, US/CANADA, 120V PCB ASSY, EURO, UK, AUS, 220/240V PCB ASSY, DUAL VOLTAGE, 115/230V BAR, IC, PRESSURE TRANSFORMER, 120V TRANSFORMER, 115/230V PANEL, BOTTOM SCREW, TAPP, 8-32X3/8, PH, TORX SCREW, HILO, 4-16x.375, PAN, XREC
Part Number 197347-001 197347-002 197347-003 197418 197417 197353-1 197353-2 197353-6 197416 197185 199800 197343 197419-06 181621-06
Qty. 1
Note 1
2 3 4
4 2 1
2
5 6 7 8 -
1 1 1 13 4
3
1
2x 3
5
4x 2
4
6
7
13x 8
Figure 5. LifestyleŽ Amplifier Exploded View 15
ELECTRICAL PART LIST
Resistors
Reference Designator RT2 R1 R5 R6 R7 R8 R10 R19 R20 R21 R23 R24 R25 R25 R26 R27 R30 R30 R31 R32 R33 R35 R36 R37 R37 R39 R40 R41 R41 R43 R44 R45 R46 R47 R48 R49 R100 R101 R102 R103 R105 R111 R112 R113
Description THERMISTOR, 10K, 0805, 5% 3.16K, 0805, 1/10W, 1% 5.1 OHM, CF, 52MM, 1/4W, 5% 5.1 OHM, CF, 52MM, 1/4W, 5% 432 OHM, 0805, 1/10W, 1% 1K, 0805, 1/10W, 5% 2.00K, 0805, 1/10W, 1% 47.0K, 0805, 1/10W, 5% 10K, 0805, 1/10W, 1/10W, 5% 2.00K, 0805, 1/10W, 1% 3.83K, 0805, 1/10W, 1% 49.9K, 0805, 1/10W, 1% 2.49K, 0805, 1/10W, 1% 100 OHM, 0805, 1/10W, 1% 24.9K, 0805, 1/10W, 1% 100K, 0805, 1/10W, 5% 332 OHM, 0805, 1/10W, 1% 49.9 OHM, 0805, 1/10W, 1% 100K, 0805, 1/10W, 1% 432 OHM, 0805, 1/10W, 1% 200 OHM, 0805, 1/10W, 1% 20K, CHIP, 0805, 5% 1M, 0805, 1/10W, 5% 2.00K, 0805, 1/10W, 1% 499 OHM, 0805, 1/10W, 1% 1.0K, ARRAY, SMT, 4 POS, 5% 10K, 0805, 1/10W, 1/10W, 5% 2.00K, 0805, 1/10W, 1% 20.0K, 0805, 1/10W, 1% 10K, 0805, 1/10W, 1/10W, 5% 20K, 0805, 1/10W, 5% 20K, 0805, 1/10W, 5% 10K, 0805, 1/10W, 1/10W, 5% 127K, 0805, 1/10W, 1% 100K, 0805, 1/10W, 1% 100K, 0805, 1/10W, 1% 4.99K, 0805, 1/10W, 1% 2.49K, 0805, 1/10W, 1% 2.49K, 0805, 1/10W, 1% 4.99K, 0805, 1/10W, 1% 4.99K, 0805, 1/10W, 1% 2.49K, 0805, 1/10W, 1% 12.1K, 0805, 1/10W, 1% 10K, 0805, 1/10W, 5%
16
Part Number 197229 133625-3161 121243-1215R15 121243-1215R15 133625-4320 133626-1025 133625-2001 133626-4735 133626-1035 133625-2001 133625-3831 133625-4992 133625-2491 133625-1000 133625-2492 133626-1045 133625-3320 133625-49R9 133625-1003 133625-4320 133625-2000 133626-2035 133626-1055 133625-2001 133625-4990 186433-1024 133626-1035 133625-2001 133625-2035 133626-1035 133626-2035 133626-2035 133626-1035 133625-1273 133625-1003 133625-1003 133625-4991 133625-2491 133625-2491 133625-4991 133625-4991 133625-2491 133625-1212 133626-1035
Note
Rev. 1 3 3
Rev. 0 Rev. 1
Rev. 0 Rev. 1
Rev. 1 Rev. 0 Rev. 1
Rev. 0 Rev. 1
ELECTRICAL PART LIST
Resistors (continued)
Reference Designator R114 R115 R116 R117 R151 R175 R176 R177 R178 R179 R180 R201 R202 R203 R204 R205 R211 R216 R217 R251 R275 R276 R277 R278 R279 R280
Description 10K, 0805, 1/10W, 5% 22.1K, 0805, 1/10W, 1% 3.83K, 0805, 1/10W, 1% 49.9K, 0805, 1/10W, 1% 4.75 OHM, 0805, 1/10W, 1% 2.49K, 0805, 1/10W, 1% 14.7K, 0805, 1/10W, 1% 1K, 0805, 1/10W, 5% 49.9K, 0805, 1/10W, 1% 49.9K, 0805, 1/10W, 1% 332 OHM, 0805, 1/10W, 1% 2.49K, 0805, 1/10W, 1% 2.49K, 0805, 1/10W, 1% 4.99K, 0805, 1/10W, 1% 4.99K, 0805, 1/10W, 1% 4.99K, 0805, 1/10W, 1% 2.49K, 0805, 1/10W, 1% 3.83K, 0805, 1/10W, 1% 49.9K, 0805, 1/10W, 1% 4.75 OHM, 0805, 1/10W, 1% 2.49K, 0805, 1/10W, 1% 14.7K, 0805, 1/10W, 1% 1K, 0805, 1/10W, 5% 49.9K, 0805, 1/10W, 1% 49.9K, 0805, 1/10W, 1% 332 OHM, 0805, 1/10W, 1%
Capacitors
Part Number 133626-1035 133625-2212 133625-3831 133625-4992 133625-4R75 133625-2491 133625-1472 133626-1025 133625-4992 133625-4992 133625-3320 133625-2491 133625-2491 133625-4991 133625-4991 133625-4991 133625-2491 133625-3831 133625-4992 133625-4R75 133625-2491 133625-1472 133626-1025 133625-4992 133625-4992 133625-3320
Note
Reference Designator C1 C2 C3 C4 C5 C8 C9 C10 C11 C12 C13 C13 C14 C15 C15 C18 C19
Description .033uF, 0805, X7R, 50V, 10% .033uF, 0805, X7R, 50V, 10% 4700uF, EL, BP, 85C, 50V, 20% 4700uF, EL, BP, 85C, 50V, 20% .033uF, 0805, X7R, 50V, 10% 470uF, EL, 85C, 35V, 20% 10uF, EL, 105C, 16V, 20% 10uF, EL, 105C, 16V, 20% .10uF, 0805, Y5V, 25V, 80% .10uF, 0805, Y5V, 25V, 80% 100uF, EL, 85C, 25V, 20% 47uF, EL, 105C, 16V, 20% 10uF, EL, 105C, 16V, 20% 1.0uF, EL, 105C, 50V, 20% 4.7uF, EL, 105C, 35V, 20% .033uF, 0805,X7R,50V,10%, .033uF, 0805, X7R, 50V, 10%
17
Part Number 133623-333 133623-333 187394 187394 133623-333 197313-471V 137126-100 137126-100 133624 133624 149948-101E 137126-470 137126-100 137126-1R0 137126-4R7 133623-333 133623-333
Note
Rev. 0 Rev. 1 Rev. 0 Rev. 1
ELECTRICAL PART LIST
Capacitors (continued)
Reference Designator C20 C21 C22 C26 C31 C32 C33 C34 C35 C36 C100 C102 C103 C104 C105 C107 C107 C108 C109 C110 C111 C150 C175 C176 C177 C178 C180 C181 C182 C183 C184 C184 C185 C200 C202 C203 C204 C205 C207 C207 C208 C209 C210 C211 C212 C213
Description 1000pF, 0805, COG, 50V, 5% .10uF, 0805, Y5V, 25V, 80% .01uF, 0805, X7R, 50V, 10% .015uF, 0805, X7R, 50V, 10% .033uF, 0805, X7R, 50V, 10% .033uF, 0805, X7R, 50V, 10% .033uF, 0805, X7R, 50V, 10% .033uF, 0805, X7R, 50V, 10% 330pF, 0805, COG, 50V, 5% 330pF, 0805, COG, 50V, 5% .01uF, 0805, X7R, 50V, 10% 22uF, EL, 105C, 16V, 20% 1000pF, 0805, COG, 50V, 5% 1000pF, 0805, COG, 50V, 5% 1000pF, 0805, COG, 50V, 5% 10uF, EL, 105C, 16V, 20% 1.0uF, EL, 105C, 50V, 20% 10uF, EL, 105C, 16V, 20% 100pF, 0805, COG, 50V, 5% .33uF, BOX, 85C, 50V, 5% .33uF, BOX, 85C, 50V, 5% .10uF, 0805, Y5V, 25V, 80% .15uF, BOX, 85C, 50V, 5% 10uF, EL, 105C, 16V, 20% 1000pF, 0805, COG, 50V, 5% 1000pF, 0805, COG, 50V, 5% 1000pF, 0805, COG, 50V, 5% 22uF, EL, 85C, 25V, 20% 1000pF, 0805, COG, 50V, 5% 6800pF, 0805, X7R, 50V, 10% 100uF, EL, 85C, 25V, 20% 220uF, EL, 85C, 25V, 20% .033uF, 0805, X7R, 50V, 10% .01uF, 0805, X7R, 50V, 10% 22uF, EL, 105C, 16V, 20% 1000pF, 0805, COG, 50V, 5% 1000pF, 0805, COG, 50V, 5% 1000pF, 0805, COG, 50V, 5% 10uF, EL, 105C, 16V, 20% 1.0uF, EL, 105C, 50V, 20% 10uF, EL, 105C, 16V, 20% 100pF, 0805, COG, 50V, 5% .27uF, BOX, 85C, 50V, 5% .27uF, BOX, 85C, 50V, 5% .27uF, BOX, 85C, 50V, 5% .27uF, BOX, 85C, 50V, 5%
18
Part Number 133622-102 133624 133623-103 133623-153 133623-333 133623-333 133623-333 133623-333 133622-331 133622-331 133623-103 137126-220 133622-102 133622-102 133622-102 137126-100 137126-1R0 137126-100 133622-101 137127-334 137127-334 133624 137127-154 137126-100 133622-102 133622-102 133622-102 149948-220E 133622-102 133623-682 149948-101E 149948-221E 133623-333 133623-103 137126-220 133622-102 133622-102 133622-102 137126-100 137126-1R0 137126-100 133622-101 137127-274 137127-274 137127-274 137127-274
Note
Rev. 0 Rev. 1
Rev. 0 Rev. 1
Rev. 0 Rev. 1
ELECTRICAL PART LIST
Capacitors (continued)
Reference Designator C250 C275 C276 C277 C278 C281 C283
Description .10uF, 0805, Y5V, 25V, 80% .15uF, BOX, 85C, 50V, 5% 10uF, EL, 105C, 16V, 20% 1000pF, 0805, COG, 50V, 5% 1000pF, 0805, COG, 50V, 5% 22uF, EL, 85C, 25V, 20% 6800pF, 0805, X7R, 50V, 10%
Diodes
Part Number 133624 137127-154 137126-100 133622-102 133622-102 149948-220E 133623-682
Note
Reference Designator Z1 D3 D4 D6 D7 D8 D10 D11
Description RECTIFIER, BRIDGE, 50V, 1A 1N5402 1N5402 BAV99, SOT23 1N5402 1N5402 BAV99, SOT23 BAV99, SOT23
Transistors
Part Number 112027 170219 170219 147239 170219 170219 147239 147239
Note 3 3 3
3 3
Reference Designator Q5 Q6 Q7
Description 2SA1179N6-CPA-TB NPN, SOT, MMBT3904 NPN, SOT, MMBT3904
Integrated Circuits
Part Number 258007 146819 146819
Note
Reference Designator U1 U2 U3 U5 U6 U7 U8 U11 U12 U13 U14
Description OP AMP, DUAL, SO-8, NJM2082M OP AMP, DUAL, SO-8, NJM2082M RESET, SOT23, MAX809, 4.65V VOL CONTROL, SOIC 20, TDA7309D QUAD OP AMP, TLO74D, SOIC MICROCONTROLLER, SO-8, OTP DUAL COMPARITOR, SO-8, LM393 VOLTAGE REG, TO-92, +8V VOLTAGE REG, TO-92, -8V POWER AMP, AUDIO, TDA7294 POWER AMP, AUDIO, TDA7294
Part Number 146820 146820 191158-01 188941-001 186112 259484 148584 146234 146235 170156 170156
Note
19
ELECTRICAL PART LIST
Miscellaneous
Reference Designator F1
Description
Part Number
Note 3, 120V, DUAL 220-240V 3, QTY. 2
F1 J1 J2 J3 J4 J5 J6
FUSE, SLO-BLO, 5x20mm, T1.6A-250V FUSE, SLO-BLO, 5x20mm, T800mA L250V FUSECLIP, 5MM CONN, JACK, RCA, DUAL, VERT CONN, SERIAL CONN, MINI DIN, RTANG, 8P JACK, QUAD SPKR TERMINAL HEADER, MED CURRENT, 5 PIN
181561-1600 177311-00800 178548 197342 178356 186431 145308 133220-05
3 3, 120V, DUAL 220-240V 3 3, DUAL 3, 120V, DUAL 220-240V 120V 220-240V
J7 S1 S2
CONN, AC POWER CONN, AC POWER CONN, HEADER, 5 POS. SWITCH, SLIDE, DPDT
146563 145306 178742-5 145307
Y1 Y2
JUMPER, INSULATED, 7.0MM SWITCH, PWR, PC MOUNT, SPST, 4A JUMPER, 22AWG, INSUL, 5MM, TAPED JUMPER, 22AWG, INSUL, 5mm
Residential Installation Accessories
135091-070 197355 135091-051 135091-051
Description ADAPTOR, SA-1 (USED WITH THE REMOTE VOLUME CONTROL) VOLUME CONTROL, WHITE RES, DECORA VOLUME CONTROL, IVORY RES, DECORA
Part Number 257179 -
Product Code 26229 21540 21541
Note
120V Variation
220/240V Variation
115/230V Variation
Figure 6. LifestyleŽ Amplifier Rear Panel Views 20
PACKAGING PART LIST
LifestyleŽ Amplifier (see Figure 7)
Reference Designator 1 2 3 4 5 6 7
Description BAG, POLY, 14 3/8X9 7/8X2 MIL REGISTRATION & WARRANTY CARD INFO CARD, WARR, MULTI LANG SHEET, SAFETY GUIDE, QUICK START OWNERS MANUAL, 3 LANGUAGE OWNERS MANUAL, 5 LANGUAGE LINE CORD, DETACH, BLK US/DUAL VOLTAGE 220-240V, EURO 240V, UK 240V, AUS CABLE, AUDIO, MINI-DIN TO RCA/S PACKING, INSERT, D/C, 23.10X5.75 PACKING, END CAP, EPS CARTON, RSC, 16.50X10.00X5.63 BAG, POLY, 12X20X4 MIL ADAPTOR, 120/230V, POLARIZED
Part Number 103351 255748 181460 255738 255722 256082 256083 198603-001 148203 134725 134726 197406 256367 256366 197404-001 197405 147013
Note
US, DUAL EURO, UK, AUS, DUAL
US, UK, AUS, DUAL EURO 3
8 9 10 11 -
3, DUAL
1 2 3 4 5 6
7 8
10
9
10
11
Figure 7. LifestyleŽ Amplifier Packaging View 21
INTEGRATED CIRCUIT DIAGRAMS
Pin Function
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
15. -Vs (Power) 14. OUT 13. +Vs (Power) 12. N.C. 11. N.C. 10. MUTE 9. STAND-BY 8. -VS (Signal) 7. +VS (Signal) 6. Bootstrap 5. N.C. 4. SVR 3. Non-Inverting Input 2. Inverting Input 1. Stand-by Gnd.
TOP-VIEW
+Vs (signal)
+Vs (power)
13 14 OUT
2 IN3 IN+
TDA7294
+
7
4 IN+MUTE 10 MUTE 9 STANDBY STANDBY THERMAL SHUTDOWN
6
BOOTSTRAP
MUTE
SHORTCIRCUIT PROTECTION 15
1
8
STANDBY GROUND
-Vs (signal)
-Vs (power)
Power Amplifier, Audio, P/N: 170156, TDA7294 22
INTEGRATED CIRCUIT DIAGRAMS
1 19
LOUDL
RecoutL
OUTL
2
Mute
17
RecoutL OUTL CSM SDA SCL DGND AGND ADD OUTR RecoutR
1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11
IN1L IN2L IN3L
IN3L LOUDL IN2L IN1L Vs CREF IN1R IN2R LOUDR IN3R
18 20
Volume + Loudness Soft Mute
Input Selector
14 13 11 IN1R IN2R IN3R
Volume Control IC, P/N: 188941, TDA7309
Mux Mux
10
CSM
3
ADD
Serial Bus Decoder, Latches
SCL SDA DGND
8 5 4 6
Volume + Loudness Mute Supply
LOUDR
AGND CREF Vs
OUTR
9
GND
1
Top View
3
Vcc
RESET
2
Pin Function 1. GND 2. RESET Output remains low while Vcc is below the reset threshold, and for a period of time after Vcc rises above the reset threshold. 3. Vcc Supply voltage
Reset IC, P/N: 191158-01, MAX809
RecoutR
12
7
15
16
Pin Function
1 2 3 4
8
Pin Function
A - + B + -
7 6 5
1. A Output 2. A Inverting Input 3. A Non-inverting Input 4. V5. B Non-inverting Input 6. B Inverting Input 7. B Output 8. V+
1 2 3 4
8
- +
A
+ -
B
7 6 5
1. A Output 2. A Inverting Input 3. A Non-inverting Input 4. GND 5. B Non-inverting Input 6. B Inverting Input 7. B Output 8. V+
Dual Op-Amp, P/N: 146820, NJM2082 23
Dual Comparitor, P/N: 148584, LM393
INTEGRATED CIRCUIT DIAGRAMS
PIN FUNCTION
1
VDD 1 GP5/OSC1/CLKIN 2 GP4/OSC2 3 GP3/MCLR/VPP 4
14
-
8 7 6 5
VSS GP0 GP1 GP2/TOCKI
2 3 4 5 6 7
A
+
+
D
-
13 12 11 10
-
B
+
+
C
-
9 8
1. A OUTPUT 2. A -INPUT 3. A +INPUT 4. +Vcc 5. B +INPUT 6. B -INPUT 7. B OUTPUT 8. C OUTPUT 9. C -INPUT 10. C +INPUT 11. -Vcc 12. D +INPUT 13. D -INPUT 14. D OUTPUT
Microcontroller, P/N: 256370, PIC12C509
Quad Op-Amp, P/N: 186112, TLO74D
Microcontroller Pin Descriptions
Pin Number 1 2
Name VDD GP5/OSC1/CLCKIN
Description Positive voltage for logic and input/output pins Bi-directional input/output port / oscillator crystal input/external clock source input (GPIO internal RC mode only, OSC1 in all other oscillator modes). TTL input when GPIO, Schmitt trigger input in external RC oscillator mode. Bi-directional I/O port / oscillator crystal output. Connection to crystal or resonator in crystal oscillator mode (XT and LP modes only. GPIO in other modes). Input port / master clear (reset) input / programming voltage input. When configured as MCLR, this pin is an active low reset to the device. Voltage on MCLR/VPP must not exceed VDD during normal device operation or the device will enter programming mode. Can be software programmed for internal weak pull up and wake-up for SLEEP on pin change. Weak pull-up always on if configured as MCLR. ST when MCLR mode. Bi-directional input/output port. Can be configured as TOCKI. Bi-directional input/output port/serial programming clock. Can be software programmed for internal weak pull-up and wake-up for SLEEP on pin change. This buffer is Schmitt trigger input when used in serial programming mode. Bi-directional input/output port/serial programming clock. Can be software programmed for internal weak pull-up and wake-up for SLEEP on pin change. This buffer is Schmitt trigger input when used in serial programming mode. Ground reference for logic and input/output pins
3
GP4/OSC2
4
GP3/MCLR/VPP
5 6
GP2/TOCKI GP1
7
GP0
8
VSS
24
Figure 8. LifestyleŽ SA-1 Amplifier PCB Rev. 0 and 1 Topside Component and Etch Layout Diagram
25
Figure 9. LifestyleŽ SA-1 Amplifier PCB Rev. 0 SMD Etch and Component Layout Diagram
26
Figure 10. LifestyleŽ SA-1 Amplifier PCB Rev. 1 SMD Etch and Component Layout Diagram
27
LifestyleŽ SA-1 Stereo Amplifier Models AMP 1V, 2V, 3V, 4V & DV
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2001 Bose Corporation
Service Manual
Part Number 257437 Rev. 00
SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE
Bose Corporation The Mountain Framingham Massachusetts USA 01701
P/N: 257437 Rev. 00 1/2001 (H) FOR TECHNICAL ASSISTANCE OR PART ORDERS, CALL 1-800-233-4408 http://serviceops.bose.com