Neutrik A2 Service Manual Fixed |link|

For two decades, the has held a legendary, albeit controversial, position in the world of professional audio testing. Known in the industry as the "BBC Meter" or the "The Brick," the A2 was a portable audio analyzer that combined a THD meter, a millivoltmeter, a frequency counter, and an impedance bridge into a single, rugged enclosure.

Includes diagnostic message explanations and step-by-step procedures for isolating faults in the generator or analyser sections. Mechanical Disassembly:

Like most test gear of its era, the Neutrik A2 relies on a switching power supply that is highly susceptible to aging. neutrik a2 service manual fixed

The Neutrik A2 (Audio Measurement System) is a legendary piece of bench gear. Known for its precision, it remains a staple for calibrating vintage tape decks, testing pro audio gear, and running bench diagnostics. However, as these units age, they encounter common component failures.

Tester reads "SHORT" on pins 2-3 of an XLR when there is none. Original manual’s error: Blames the microcontroller. Wrong. The fixed diagnosis: Check relay K1 (Omron G6K-2F-Y). It becomes sticky after years of use. Replace with G6K-2F-Y-TR (the low-signal version). Also clean the area around varistor RV201 – leaked flux creates parasitic resistance. For two decades, the has held a legendary,

Clean the relay contacts using a high-quality, residue-free electronic contact cleaner. If a relay has welded contacts or high resistance, desolder it and replace it with a modern telecom-grade equivalent matching the original footprint and coil voltage. Calibration: Bringing the A2 Back to Spec

The native THD+N (Total Harmonic Distortion plus Noise) of the generator reads higher than the factory specification (typically Mechanical Disassembly: Like most test gear of its

Check the response across the audio spectrum (20 Hz to 20 kHz, and up to 100 kHz if using the A2-D digital extension) to ensure the analog filters are tracking perfectly linear. Preventative Maintenance Tips

Even if the hardware is fine, the A2's software can get stuck in a bad state. This was the case for a user who reported that pressing buttons during startup triggered a digital input calibration mode that the unit could not exit.

The original Neutrik A2 manual is functionally accurate but procedurally sparse. For the modern bench technician, the original text suffers from three primary flaws: