Installation, cont’d

Audio connections

8Input 1 through Input 5 connectors — Connect unbalanced stereo or mono audio sources (such as DVD players or VCRs) to these pairs (left and right) of RCA connectors for audio input.

L

R

9Input 6 through Input 8 connectors — Connect unbalanced stereo audio sources (such as computers) to these 3.5 mm mini stereo jacks for unbalanced audio input. Figure 2-3 shows how to wire the audio jack.

Tip (L)

Ring (R)

Sleeve ()

Figure 2-3 — Input 6 through input 8 audio connector wiring

10Output A connector — Connect an audio device, such as an amplifier or powered speakers, to these left and right RCA connectors.

11Output B connector — Connect an audio device, such as powered speakers, to this 3.5 mm, 5-pole captive screw connector for balanced or unbalanced audio output.

Figure 2-4 shows how to wire the captive screw audio connector. The connector is included with the switcher, but you must obtain the cable. Insert the wires into the appropriate openings in the captive screw connector. Tighten the screws on top to fasten the wires.

CAUTION

Connect the sleeve(s) to ground (). Connecting the sleeve(s) to a negative (-) terminal will damage audio output circuits.

Tip

L

Left

Tip

NO GROUND HERE.

Ring

 

 

 

Sleeve(s)

 

 

 

Tip

R

Right

Tip

NO GROUND HERE.

Ring

 

 

 

L R

Left

Right

Unbalanced Stereo Output Balanced Stereo Output

Do not tin the wires!

Figure 2-4 — Wiring the audio output connector

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

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

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

By default, the audio output follows the video switch.

2-4 IN1508 Scaling Presentation Switcher Installation

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Extron electronic IN1508 manual Installation, cont’d, Audio connections