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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CW refers to a clockwise knob setting and CCW refers to a counter-clockwise setting.

Faulty DRAM can cause data errors in the effects processing circuitry. Schematics and Assembly Drawings. The output voltage from U22 is either deglitched and applied to audio output circuitry, or compared to sampled input level by the comparator U23 for analog to digital conversion.

IUF C47 4 0. A full description and timing diagram of DAC control circuitry is explained in the Lexichip section of this manual.

This charges storage capacitor C41 or 52 depending on the channel being output to the DAC output level. Checks the interrupt timing by comparing it to coded timing loops.

Handling of user data input from digital user controls 4. As the MIDI button is released, the selected test is initiated.


A lkHzdB audio signal mahual be applied to inputs, and the signal can be traced into and out of the converter. Search the history of over billion web pages on the Internet. Occasional oscillations and noise appear on output, even while sitting idle, and disappear when a new program is selected.

Full text of “Lexicon: lexicon lxp 1 sm”

Voltage requirements are printed on the power pack. Audio output cable from right channel output to Level Meter input 4. Checks the MIDI serial port transmit and receive functions.

Probing the crystal lead furthest away from the LEXICHIP can cause the oscillator to lexiconn and the unit will then require a power down and power up to restart.


Audio input cable from Low Distortion Oscillator output to right channel input 2. Parts List 7. Units in the field should have his capacitor populated if they exhibit the following s Tnptoms; 1. Measure output level on right channel output. IUF C59 4 O. Used also to indicate results of diagnostic tests or per- formance of internal MIDI button and status Indicator.

Two discrete FET transistors, Q6 and Q7 provide an output muting function by shorting U26 outputs to ground after the ohm resistors in series with the outputs. DAC output is compared to analog input by the comparator.


IUF C46 4 o. A protection diode CR2 allows an added discharge path for C4 during power down conditions. Occasional crashes during operation.

Word Clock pin 59 is used as a clock reference by the LXP Accepts power from the supplied power pack. A data value is latched into lexjcon latch. This test program will run continuously until another function is selected.

Z80 Reset which requires an inverter to produce an active low Reset for the Z A thorough visual inspection of a malfunctioning unit once opened is good troubleshooting practice. Under normal conditions the LXP-1 requires minimal maintenance. This insures that the Z80 is the last device enabled and that all other devices msnual be in an active known state after Z80 Lxl is removed.

OluF capacitor is connected across the AC input to reduce noise spikes from the line voltage input. This inverter pin 2 output ZRST drives three separate reset circuits; 1.