BOSE AM141P Schematic

AM141P PCB 259535 Test Procedures

1. BASS CHANNEL PERFORMANCE SPECIFICATIONS - All signal measurements

shall be made with both left and right audio inputs driven simultaneously, from a

common source, at a sinusoidal input level of 200 mVrms unless otherwise specified.

1.1 DC Offset (with audio inputs shorted): 0 ± 70 mV
Measurement: _____________

1.2 Bass Channel Reference Gain (referenced to input), at 90 Hz 30 dB ± 1.5 dB
Measurement: _____________

1.3 Bass Channel Large Signal Distortion at 80 W (17.9 Vrms)

Input level at 0.7 Vrms, 80Hz Hz: < 0.2% THD

Measurement: _____________

2. LEFT/RIGHT CHANNEL PERFORMANCE SPECIFICATIONS - Unless

otherwise stated, both audio channel inputs are to be driven simultaneously from a

common source, at a sinusoidal input level of 200 mVrms.

2.1 DC Offset (with audio inputs shorted): 0 ± 70 mV
Measurement: _____________

2.2 Reference Gain at 1.0 kHz: 18.8 dB ± 1.5 dB
Measurement: _____________

2.2 L/R Channel Large Signal Distortion at 30 W (15.5 Vrms)

Input level at 1.8 Vrms, 1 kHz: < 0.2% THD

Measurement: _____________

2.3 Short Circuit Protection

Input level at 1.0 Vrms, 1 KHz. Momentarily short the left channel output with a ≤ 0.5 Ω resistive
load. Verify that the mute line (J2 Pin 5) triggers low (<0.2 V). Wait three seconds. Repeat for
right channel.

Measurement: _____________

Tested By:___________________

Initials