Appendix; T1 Tonematch Test Cables - Bose T1 ToneMatch Service Manual

T1 ToneMatch ® Test Cables
Note: In order to be able to properly test the T1 ToneMatch Audio Engine, you will need to make
up a few test cables.
1. Balanced XLR Microphone Input Test Cable
Parts needed:
1 - XLR male connector
1 - Dual banana jack
Shielded stereo cable, 6 feet
This cable is used to test the channel 1, 2 and 3 microphone inputs on the T1. These input jacks
are dual purpose jacks that will accept either XLR or 1/4" TRS phono jack balanced inputs.
• Connect the dual banana jack positive (+) connection to pin 2 of the XLR jack.
• Connect the dual banana jack negative (-) connection to pin 3 of the XLR jack.
•
Connect the cable shield to pin 1 of the XLR jack.
2. Balanced 1/4" Test Cable
Parts needed:
1 - Tip/Ring/Sleeve (TRS) 1/4" phono jack
1 - Dual banana jack
Shielded stereo cable, 6 feet
This cable is used to test the channel 1, 2, 3 and 4/5 line inputs and the preamp, master and
aux outputs.
• Connect the TIP of the phono jack to one of the shielded twisted pair wires.
• Connect the RING of the phono jack to the other wire in the shielded twisted pair.
•
Use an ohmmeter to determine which wire is connected to the TIP of the phono jack.
Connect this wire to the positive (+) connection on the dual banana jack.
•
Connect the wire connected to the RING of the phono jack to the banana jack negative (-)
connection. The SLEEVE portion of the jack is the common ground where the cable's shield
should be connected. Connect the shield at the phono jack end only.

Appendix

TIP RING
44
SLEEVE