Extron electronic MDA3, MDA 3SV DUAL, MDA 3A RCA instruction manual Phono Audio Connectors

NOTES:

•The length of exposed wires is critical. The ideal length is 3/16 inch (5 mm).

•If the stripped section of wire is longer than 3/16 inch, the exposed wires may touch, causing a short circuit.

•If the stripped section of wire is shorter than 3/16 inch, wires can be easily pulled out even if tightly fastened by the captive screws.

•Do not tin the power supply leads before installing them in the connector. Tinned wires are not as secure in the connector and could be pulled out.

•When making connections for the MDA from existing audio cables, see figure 3. A mono audio connector consists of the tip and sleeve. A stereo audio connector consists of the tip, ring and sleeve. The ring, tip, and sleeve wires are also shown on the captive screw audio connector diagrams, figure 2 and figure 4.

Tip Sleeve Tip (Left) Sleeve (Gnd)

Tip (Signal) Sleeve (Gnd)

Unbalanced Mono

Ring (Right)

Tip (Left)

Sleeve (Gnd)

Unbalanced Stereo

Figure 3. Phono Audio Connectors

FAudio Outputs (1 through 3) connectors — Connect up to three balanced or unbalanced audio devices to these 3.5 mm, five-pole captive screw connectors. Connect audio devices, such as an audio amplifier or powered speakers. See figure 4 to properly wire an output connector.

inch

Do not tin the wires!

No Ground Here

Tip	L	Tip	L
		Ring
Sleeves		Sleeves
Tip	R	Tip	R
		Ring

No Ground Here	Balanced Stereo Output
Unbalanced Stereo Output

Figure 4. Captive Screw Connector Wiring for Audio Output

ATTENTION: For unbalanced audio, connect the sleeves to the ground contact. DO NOT connect the sleeves to the negative (-) contacts.

NOTE: The length of exposed wires is important. The ideal length is 3/16 inch (5 mm) (see the NOTES above for details).

GBal(anced)/Unbal(anced) DIP switches — For each balanced audio output, set the associated DIP switch to the Balanced (up) position. For each unbalanced audio output, set the associated DIP switch to the Unbalanced (down) position.

The balanced or unbalanced nature of the audio output is determined by the output connector wiring, not the audio input. Each output can be balanced or unbalanced independently of the other two outputs.

MDA 3 Series • User Guide 3