LPB - Service Manuals
5 manuals available for download
LPB is a respected manufacturer of professional audio consoles and signal processing equipment built for studio and broadcast applications. Our complete collection of LPB service manuals, repair guides, and technical documentation—including owner's manuals, workshop materials, and detailed parts lists—provides everything you need for maintenance, troubleshooting, and component-level repairs. Whether you're servicing a Signature series console or working with specialized audio modules, download the PDF documentation you need to keep your LPB equipment operating at peak performance.
LPB Monogram II Series Audio Console Instruction Manual
Instruction manual for the LPB Monogram II series stereo audio consoles, covering the five-channel M-5S and eight-channel M-8S mixer models. This workshop manual provides complete technical specifications, installation guidelines, grounding practices, and warranty information essential for setup and operation. Detailed sections cover mixer configurations, input and output specifications, frequency response characteristics, harmonic distortion measurements, and signal-to-noise performance metrics. Includes final test and inspection report documentation, ordering information, and full technical reference material.
LPB SA-1 LED Peak Level Indicator - Schematic and Parts List
Complete schematic diagram and parts list for the LPB Model SA-1 LED Peak Level Indicator, an essential service reference for technicians maintaining or repairing audio metering equipment. The documentation details the circuit topology built around a dual op-amp configuration using the uA747PC, with a discrete transistor output stage employing a 2N3904 for driving the LED display. Full component specifications are provided for all resistors, capacitors, the peak adjustment potentiometer, and the high-intensity red LED, enabling accurate troubleshooting, component replacement, or circuit reconstruction. This repair manual covers the complete electronic design from signal input through to visual peak level indication, making it indispensable for anyone servicing this type of audio monitoring instrumentation.
LPB Signature II Audio Console Instruction Manual
Instruction manual for the LPB Signature II audio console series, covering the S-20 10-channel dual stereo mixer and companion models S-12, S-13C, S-13E, S-14A, S-15A, and S-21. This workshop manual provides complete operational and technical documentation for setup, adjustment, and maintenance. Detailed sections address console features and specifications, control knob operation, program bus switching, input and output connector configurations, microphone preamplifier design, rotary step attenuators, and modular circuit board construction. Wiring diagrams support troubleshooting and repair work. Specifications include frequency response, distortion, noise floor, impedance matching, and output signal levels. Technical data covers the internal cue system, relay muting circuits, power transformer ratings, and chassis assembly details. Also documents the optional Model SA-1 LED peak level indicator module. Console dimensions and weight specifications are provided for installation planning. Includes test and inspection procedures for field verification.
LPB Signature II Series Plug-In Circuits Schematic
Schematic diagrams and detailed parts list for LPB Signature II Series plug-in circuit modules. This service manual covers the microphone preamplifier module, built around the LM381 IC op-amp with transformer coupling, toggle switch, and precision resistors and capacitors for signal conditioning. Also included is the voltage regulator module using a standard 3-terminal linear regulator topology. Each section provides full component specifications, enabling technicians to troubleshoot, service, and recalibrate the circuits. Essential reference for understanding the signal path and power supply design in these pro audio modules.
LPB Signature Series Plug-In Circuits Schematic
Complete schematic diagram and comprehensive parts list for LPB Signature Series plug-in audio console modules. This service documentation covers the full circuit topology of modular amplifier and preamp sections, including microphone preamplifier, power amplifier, line amplifier, input transformer, and voltage regulator circuits with detailed transistor and component schematics. The parts list specifies discrete components—resistors, capacitors, and diodes—alongside key active devices: transistors MPS U04, MPS U52, MJE-205, MJE-105, MPS 052, MPS 004, and operational amplifiers RM7410C, MC 1439L, U6A7741393, U6A7723393. Essential reference for repair, recapping, troubleshooting, and restoration of vintage LPB Signature Series console hardware. Original manufacturer documentation dated February 1976.