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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LEXICON LXP-1 Owner’s Manual

The combination is as follows: Use a soft, lint-free cloth slightly dampened with warm water manuall a mild detergent to clean the exterior surfaces of the unit. As the MIDI button is released, the selected test is initiated. Q5 controls U9 CE2 pin The last operation is the storage of zeros in all locations.

This insures that the Z80 is the last device enabled and that all other devices will be in an active known state after Z80 Reset is removed. Swap all right and left channel audio connections sind repeat steps 1. If the selected test is successful, the red MEM LED located on the lxicon right side of the front panel will flash at a rate of approximately 6 Hz. Acceptable output level should measure between Search the history of over billion web pages on the Internet.

Checks the interrupt timing by comparing it to coded timing loops. A familiarization with block diagram and descriptions in the Qrcuit Description section will also be janual in isolating specific problems.

LEXICON LXP-1 SM Service Manual download, schematics, eeprom, repair info for electronics experts

Under normal power on conditions, Q5 will conduct, maintaining an active high on CE2. The front panel push button and Program select switch are exercised thoughout the diagnostic testing. Check all power rails with a scope or multimeter. Audio input cable from Low EHstortion Oscillator output to right channel input 2. Z80 Reset which requires an inverter to produce an active low Reset for the Z No part of it may be reproduced ortransmitted by any means or in any form, without express prior consent in writing from Lexicon.


Voltage requirements are printed on the power pack. Left and Right channel outputs from deglitch amplifiers are filtered by 1 5kHz low pass filter modules U25 and U When selected, both red LEDs will blink in unison at a rate of approximately 2 Hz until the next test selection is made.

Input impedance is 50 kilohms in stereo, and 25 kilohms in mono. The user control varies the wiper position of R39 in order to control the percentage of Wet processed and Dry unprocessed signals on LXP-1 outputs. It operates at a Audio input cable from Low Distortion Oscillator output to left channel input 2.

IUF C59 4 O. Inspect the external AC power transformer for any signs of kxp damage. U27 outputs are applied to one end of one of the ganged linear 50k ohm pots R If the two knobs are set to the same position, the test result will indicate success, and vice-versa. Unit is occasionally dead on power up. Do not use alcohol, benzene or acetone-based cleaners or any strong commercial cleaners.

Used also to indicate results of diagnostic tests or per- formance of internal MIDI button and status Indicator. Avoid using abrasive materials such as steel wool or metal polish.


DAC output is compared to lexicin input by the comparator. Full text of ” Lexicon: IUF X77 C26 0. Calculates the ROM checksum and compares it to the stored value.

However, you should observe the same reasonable precautions that apply to any piece of audio equipment: Measure output level on right channel output.

Ql, which is driven by U1 pin 6 output, is the R-C delay circuit driver. The opposite end of the dual pot is connected to the Right and Left preamp amnual outputs.

Observe whether the malfunction is intermittent, heat related or shock related.


Installing a 33pf ceramic bypass capacitor in C21 position can eliminate oscillator startup and intermittent failures. This test takes approximately 30 seconds and the results will be displayed immediately upon completion. This lexico level will be stored by manuap storage cap until the next output sample is applied.

This determines if the current DAC output is equal to the sampled input, if not, a new data value is latched out to the DAC for comparison. The Federal Communications has prepared a booklet which you may find useful: Move internal jumper location at W3 to W2. A lkHzdB audio signal can be lexocon to inputs, and the signal can be traced into and out of the converter.

Checks the MIDI serial port transmit and receive functions.