Bose AmPlus 50 Supplement Manual page 28

Table 9. AmPlus™ 100 Amplifier Initial Switch Settings
Control Name
Input Mode
Source Trim - Channel 1
Source Trim - Channel 2
Zone 2 Trim
Bass Adjust - Channel 1
Bass Adjust - Channel 2
High Pass Filter
Remote Volume Setup
Source Mix
Amp Mode
Table 10. AmPlus 50 Amplifier Initial Switch Settings
Control Name
Source Trim - Channel 1
Source Trim - Channel 2
Bass Adjust
High Pass Filter
Amp Mode
®
FreeSpace Model 1B Equalizer Card
Test Setup Notes:
1. Place the AmPlus 50 or 100 Amplifier on
the test bench and, using a phillips-head
screwdriver, remove the five screws that
secure the top cover to the amplifier.
2. Place all switches of the AmPlus 50 or
100 Amplifier as listed in Table 9 or Table
10 above.
Note: The AmPlus 50 Amplifier is a single
channel amplifer. It has the components
that are used for the Left channel (Channel
1) only. The inputs for Channel 1 and 2 at
J1 are summed internally.
3. On the Amplus Amplifier, place a 100 Ω,
100 Watt load onto the 70/100 V output at
J6. Place the Amp Mode Switch S6 to the
70/100 V position.
TEST PROCEDURES
Reference Designator
S1 switch
R1 potentiometer
R2 potentiometer
R3 potentiometer
R4 potentiometer
R5 potentiometer
S4 switch
S5 switch
S7 switch
S6 switch
Reference Designator
R1 potentiometer
R2 potentiometer
R4 potentiometer
S4 switch
S6 switch
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Default Setting
Left (2-Channel/stereo)
CW (no attenuation)
CW (no attenuation)
CW (no attenuation)
CCW (no gain)
CCW (no gain)
Left (HPF OFF)
Left (1 remote)
Left (2 - channel)
Left (70V/100V mode)
Default Setting
CW (no attenuation)
CW (no attenuation)
CCW (no gain)
Left (HPF OFF)
Left (70V/100V mode)
4. The remote volume inputs at J4, (J4-1
to J4-2 and J4-3 to J4-4 for the AmPlus
100, and J4-1 to J4-2 for the AmPlus 50),
are to be terminated with a 10 kΩ, 1/4
Watt resistor. This will set the gains for
each channel to the appropriate levels.
5. Connect a balanced input to the channel
inputs at J1, either Channel 1 or 2.
6. The input levels are to be the actual
input level as measured at the amplifier,
and not the setting on the signal generator.
FreeSpace Model 1B Equalizer Card
Electrical Tests
1. 1 kHz Flush EQ Gain Test
1.1 Set up the AmPlus Amplifier as listed in
the Test Setup Notes. Do not install the
Model 1B Equalizer PCB at this time.
1.2 Apply a balanced 1 kHz, 31.5 mV
signal to the input at J1, Channel 1 or 2,
as appropriate.