Troubleshooting; Low Voltage; Common Midi Problems - Lexicon LXP-15 Owner's Manual

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Quick reference manual (2 pages)

Table Of Contents

Table of Contents

This chapter is intended primarily to help you to recognize some common error

states which can be corrected from the LXP-15 front panel controls, or by simple

means such as cable replacement. Any error states which are not covered here

should be referred to Lexicon Customer Service.

In a low voltage, or "brown-out" condition, the LXP-15 will freeze in its current

state. None of the controls will have any effect. When power returns to a normal

level the unit will reset itself as though it had just been powered on. After the

initial power up display message, the unit will return itself to the state it was in

when the power dropped. If the unit does not reset itself, turn the power OFF,

then ON to resume normal operation.

Temperature extremes may cause the LXP-15 to exhibit unpredictable behav-

ior. If the unit has been subjected to temperatures below 32 F (0 C) or above

95 F (35 C), it should be turned off and allowed to return to normal temperature

before use. The unit may be damaged by exposure to temperatures below -22 F

(-30 C) or above 167 F (75 C), or by exposure to humidity in excess of 95%.

If a unit exposed to such conditions fails to operate after it returns to a normal

operating temperature, contact Lexicon Customer Service.

No output from the LXP-15.

Check to see if Global Patches are set to Immediate mode. If you don't have a

control source patched to a destination, the controller will go to its minimum

value! If you don't have anything patched to the input and output parameters, this

may result in no output. When you access a preset, all of the parameter values

will immediately jump to whatever value you have selected, destroying the

preset's sound. See page 4-14.

The LXP-15 doesn't respond to MIDI.

• Check to make sure a MIDI cable is connected to MIDI OUT of the external

device and to MIDI IN on the LXP-15.

• Test the MIDI cable.

• Verify that you have the LXP-15 and the external device communicating on the

same MIDI Channel. See page 6-1.

A MIDI indicator in the upper lefthand corner of the display will flash to indicate

the LXP-15 is receiving MIDI data on the selected channel.

The LXP-15 doesn't go to the Program Change number transmitted — it's

off by 1.

Your MIDI device is transmitting Program Changes 0-127. The LXP-15 trans-

lates 0 to 1, 1 to 2, etc. Subtract 1 from the LXP-15 program number you want,

and transmit that Program Change number. See page 6-2.