BOSE ZONE 2 Schematic

Zone 2 (Blue RCA Jacks) PCB 195178

1. 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 220 mVrms.
Left channel output measurements taken at J9 Pin 1 (+) and 2 (-)
Right channel output measurements taken at J9 Pin 3 (+) and 4 (-)

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

Measurement: _____________

1.2 Reference Gain at 1.0 kHz: 34.0 ± 1.5 dB

Measurement: _____________

1.3 L/R Channel Large Signal Distortion at 30 W (11.0 Vrms), loaded - 4 Ohm, 1%, 50W

Input level at 220 mVrms, 1 kHz: < 0.2% THD

Measurement: _____________

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

Input level at 0.70 Vrms, 1 kHz. Distortion at left and right outputs: < 6.0% THD.

Measurement: _____________

1.5 Short Circuit Protection

Input level at 0.35 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