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General safety precautions for operating the apparatus, including fire and shock risks.
Instructions for power sources, hazards, ventilation, and placement of the unit.
Guidance on handling the power cord and servicing by qualified personnel.
Important notice regarding backward compatibility of M1309V06+ circuit boards with older versions.
Diagram and labels for rear panel inputs, outputs, and controls like Level, EQ, and Mixer.
Details on model type, voltage ratings, fuse specifications, and safety warnings.
Block diagram illustrating signal flow through mixer, EQ, limiter, and amplifier sections.
Details on the Class-D woofer amplifier and HF driver stages.
Details on system type, power, SPL, frequency response, crossover, and amplifier types.
Information on drivers, inputs, controls, enclosure materials, dimensions, and weight.
Schematic details of input gain control, master trim, and clip detection circuits.
Schematic of the limiter, boost/limiter, and RMS limiter circuits.
Schematic diagrams for the horn and woofer amplifier sections.
Schematic for the phantom power supply circuit and associated voltage rails.
Schematic of the mixer section including mic, line, and CD inputs with gain controls.
Schematic for the power supply, including transformer, fuses, and voltage regulators.
Detailed layout of components on the M1309B PCB for NX55P, including revision notes.
Notes on updated component values for the 7527 driver and general production guidelines.
A table listing components, their part numbers, and related board revisions.
History of changes and revisions made to the M1309 PCB database for NX55P.
Diagrams of component pinouts and a list of potentiometers used in the unit.
Layout diagram for the M1369 V05 PCB, showing component placement and connections.
Production notes and PCB database history for the M1369 V05.
Schematic diagram of the high limiter circuit using LM13600N and NE5532N components.
Schematic diagram of the low limiter circuit using LM13600N and NE5532N components.
PCB layout showing component placement for the HI and LO limiter circuits.
Diagram of the rear panel controls including levels, EQ, and mixer settings.
List of knob part numbers and quantities for replacement or identification.
Comprehensive list of components with part numbers, descriptions, and related pages.
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