S1 Pro+ Wireless PA System
Troubleshooting Tips
Refer to the S1 Pro+ Wireless PA System service manual, reference number 869583-SM, located on
the Professional Products page of the Bose Service web site at http://intranet.bose.com/tsg or
http://serviceops.bose.com for any information not presented in this document.
1. Preventative Repair Measures
Note: Perform the following on all units returned for repair.
Update to the latest version. To check for and
download system software updates, use your
computer to visit the Bose updater website
at: btu.Bose.com.
2. Troubleshooting
Battery discharges
when not in use.
The unit continues to draw power when removed
from AC and turned off. A fully charged battery can
fully discharge in 20-22 days. That is normal.
Battery does not last
as long as expected.
With typical usage, the battery lasts up to 11 hours.
Battery performance and charging time varies with the
content played and volume at which it’s played. When
played at high volume, with multiple inputs used, and
with heavy bass content, the battery might discharge
within ~3 hours. That is normal.
Low Frequency
rumble noise.
With no input connected and the Tone Match Acoustic
Guitar Piezo preset selected, there might be a low
frequency noise. This will not be present when an
input is connected, or the preset is not selected.
No Audio output,
noise on one or more
channels
Main PCB – check U17A/B and D12 (-15V supply
U22). U31/34 dragging down 15V supply.
No Audio from
Bluetooth, unit
appears to be
connected.
Bluetooth LE (controls) connection is made but
Bluetooth classic (Audio) connection is not.
1. Delete the S1 Pro + from your BT device list.
2. Press and hold the Bluetooth button on the unit
for 10 seconds until the Bluetooth light blinks
white 3 times.
3. Add the unit to your Bluetooth device.
Control button not
rotating or does not
depress or return
after pressing.
Check the
Encoder
switch.
Replace the switch with improved switch 850872-
0020.
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