P83241 C
Sheet 8 of 9
Figure 8: MX-8 Rear Panel
23. POWER ON/OFF SWITCH AND RECEPTACLE:
The mixer is designed to operate from a line voltage of 115VAC at 50/60Hz. The IEC 320 receptacle has a male input to
connect a grounded line cord and female output for attaching a switched external auxiliary load. The external auxiliary load is
not to exceed 3 Amps at 115VAC.
24. MIC 1, MIC 2, MIC 3, AND MIC 4 AND MIC 5, TEL TERMINAL BLOCKS:
Three terminals are used for each MIC or TEL input. The center terminal for each input allows for the attachment of the shield
for that input cable. To maintain proper signal polarity, the plus signal should be attached to the (+) terminal and the minus
signal should be attached to the (-) terminal.
Note
: To prevent the input overdrive from clipping, the LIMITER must be active.
25. MIC 5/TEL SELECT SWITCH:
This switch allows the selection between the MIC 5 and TEL (Balanced transformer-isolated) inputs for the fifth paging audio
input. Switch position to the left for MIC 5, and to the right for TEL input.
26. AUX 1, AUX 2, AND AUX 3 PHONO JACK INPUTS:
AUX 1 is a high impedance input, automatically MUTED by any paging input, for an FM tuner, CD player, tape player, tone
generator, or any other line level program source (i.e., MIC/LINE mixer). The AUX 2 and AUX 3 are the same as the AUX 1
without the MUTE. The AUX inputs are not affected by the LIMITER circuit.
27. LINE OUT (PHONO JACK) WITH PRE/POST EQ SELECT:
The LINE OUT is the mixer main output for driving system amplifiers. The LINE OUT can also be used to drive self-amplified
speakers at line level. The LINE OUT can be selected as an output either before the TREBLE/BASS control (PRE-EQ), or after
the TREBLE/BASS and POST MASTER gain control (POST-EQ). The switch position to the left selects PRE-EQ, and to the
right selects POST-EQ.
Note
: Set PRE/POST EQ in POST-EQ position to ENABLE MASTER gain control.
28. PATCH OUT, TAPE OUT AND PATCH IN PHONO JACKS:
The PATCH OUT is the mixed audio signal at line level prior to the TREBLE/BASS control. This signal is available to drive an
external audio processor. The resultant processed audio signal is to be reapplied to the MX-8 at the PATCH IN. The TAPE
OUT is the same signal as the PATCH OUT but is reduced 10dB. When an external audio processor is used, both the TREBLE
and BASS controls should be centered.
Note
: When a phono plug is placed in the PATCH OUT phono jack, the mixed audio signal is disconnected before the
TREBLE/BASS and MASTER gain control. The outboard processed signal may then be reinserted at the PATCH IN jack.
29. TROUBLESHOOTING:
Symptom Possible
Solution
No Output
- Verify unit is receiving AC power.
- Check input source functionality and level.
- Output may not be connected or connected incorrectly.
Low, High, or Distorted Level
- Input signal may be too high or too low.
- Check gain control on unit.
- Input or output impedance may be mismatched.
NOTE:
This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of FCC
Rules. These limits are designed to provide reasonable protection against harmful interference when this equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his/her own
expense.
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio
Interference Regulations of the Canadian Department of Communications.
