BOSE ZONE 1 Schematic

Zone 1 (Green RCA Jacks) PCB 195225 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.
Bass channel output measurements taken at J3 Pin 2 to 1 (ground)

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

1.2 Bass Channel Reference Gain (referenced to input), at 100 Hz 28.3 ± 1.5 dB
Measurement: _____________

1.3 Bass Channel Large Signal Distortion at 80 W (17.9 Vrms), loaded - 6 Ohm, 1%, 100W

Input level at 685 mV, 100 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.
Left channel output measurements taken at J9 Pin 1 (+) and 2 (-)
Right channel output measurements taken at J9 Pin 3 (+) and 4 (-)

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

2.2 Reference Gain at 1.0 kHz: 19.2 ± 1.5 dB
Measurement: _____________

2.3 L/R Channel Large Signal Distortion at 30 W (15.5 Vrms), loaded - 4 Ohm, 1%, 50W

Input level at 1.7 Vrms, 1 kHz: < 0.2% THD

Measurement: _____________

2.4 Compressor Test, loaded - 4 Ohm, 1%, 50W

Input at 1.9 Vrms, 170 Hz. Distortion at left and right outputs: < 6.0% THD.

Measurement: _____________

2.5 Short Circuit Protection

Input level at 1.0 Vrms, 1 kHz. Momentarily short the left channel output. Verify that the
mute line (J2 Pin 5) triggers low (<0.2 V). Wait three seconds. Repeat for right channel.

Measurement: _____________

Tested By:___________________

Initials