LXP -1 Owner’s Manual. 1. Installing the LXP Specifications. The following specifications are subject to change without notice. Frequency Response. View and Download LEXICON LXP-1 owner’s manual online. Multi-effect processing module. LXP-1 Recording Equipment pdf manual download. Lexicon LXP-1 Pdf User Manuals. View online or download Lexicon LXP-1 Owner’s Manual, Manual.

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Trace this input pulse out from U3 pin 15 to the U1 inverter pin 8 and 9.

Lexicon LXP-1 Manuals

Flashes to indicate that the system is under external control. Generally, the test action is performed once and the results are displayed immediately.

R2 and C4 provide this power up Reset delay. The opposite end of the dual pot is connected to the Right and Left preamp stage outputs.

Under normal power on conditions, Q5 will conduct, maintaining an active high on CE2. If the two knobs are set to the same position, the test result will kanual success, and vice-versa. Audio input cable from Low Distortion Oscillator output to left channel input 2. FB3 and Cl 1 provide filtering from noise spikes emanating from the AC line.

Position 1 3 CHORUS 2 Loads a program which tests the specifications of the converter circuitry by Audio Test mode producing manul digitally processed output signal which is identical to the input signal. This is the heartbeat interrupt for the software operating system. It produces a fast C4 discharge time for Reset enable and goes to a high impedence state producing the R-C delay on Reset disable. Checks the interrupt timing by comparing it to coded timing loops.


Schematics and Assembly Drawings. Check all power rails with a scope or multimeter. Handling of user data input from digital user controls 4. This user control determines the signal level applied to the final output Buffer stage U The output voltage from U22 is either deglitched and applied to audio output circuitry, or leicon to pexicon input level by the comparator U23 for analog to digital conversion.

This inverter pin 2 output ZRST drives three separate reset circuits; 1. A protection diode CR2 allows an added discharge path for C4 during power down conditions. Sweep from 20 Hz to 20kHz.

If noiseispresentonbothwetanddry signalscheckthesupplyrails and trace the audio signal through the analog circuitry. Move internal jumper location at W3 to W2.

Inputs are DC isolated by lOuF non-polarized coupling capacitors. Many of these programs will identify specific hardware failures within the unit and will be referred to in this section.

Checks the MIDI serial port transmit and receive functions. The removal of VCC causes Q4 to shut off.

It performs tiie following functions: Observe whether the malfunction is intermittent, heat related or shock related. This allows both outputs to be present when only one LXP-1 output is used by summing lx; and right singlas together. Swap all right and left channel audio connections and repeat steps 1. Both jack inputs are shorted together, allowing a single input source to be applied to left and right input circuitry.


Diagnostic test programs are selected by adjusting the Program Select knob the third knob from the right on the front panel to one of its 15 assigned positions, then pressing and releasing the MIDI button.

LEXICON LXP-1 Owner’s Manual

Audio terminator plug to left channel output un — nun Performance Verification Lexicon Lxo unprocessed Frequency Response, cont’d. This charges storage capacitor C41 or 52 depending on lexicoon channel being output to the DAC output level.

The LXP-1 has no power switch — it can be left on all the time. If not installed and used in accordance with the instruction manual, it may cause interference to radio communications. A full description and timing diagram of DAC control circuitry is explained in the Lexichip section of this manual. Z80 Reset which requires an inverter to produce an active low Reset nanual the Z Swap all right and left channel audio connections sind repeat steps 1.

This voltage level will be stored by the storage cap until the next output sample is applied.