Customer reports that amplifier switches on but won’t click onto the source enabling it to play music. Found that half the power supply was not working, +63V rail was missing from which 5v logic and +24v rails are derived. Thermal imagery showed that the area of the PSU board with the regulator pass through transistors […]
NAD 319 Stereo integrated amplifier repair Read More »
Customer brought this vintage 80’s bit of kit to see if could get working as had sentimental value, they felt that the preamp was dead. Plugged in and there was no light on the preamp and indeed seemingly no output. However the preamp is powered from the power amp via a special cable, and could
Naim Audio NAC42 / NAC110 pre-amp/power amp repair Read More »
Customer brought in a rather tatty looking Rotel RA-1000, clearly had a good life (think ‘ex-pub’), but had some issues, and wanted a longer mains lead fitting On testing, left channel no output, turned out to be a physically broken ALPS remote rotary switch, made of unobtainium, so had to effect a repair. Metal slider
Rotel RA-1000 service Read More »
Customer brought their RCF sub in, was working ok then suddenly went into protect and no longer starts up and makes a click sound every other second or so. Inside we see Digipro 1000s – a £300 replacement module unit. Sod that, let’s fix it… As long as it’s not firmware on that microcontroller! Unit
RCF Art902 Active Sub (Digipro 1000s) stuck in protect Read More »
Customer said their LK-1 “wasn’t behaving right” (pops/clicks between channels) so asked me to take a look. Several faults found (including some not noticed/mentioned by customer) on preamp board, including dead BC212L transistor shorted in the MC input (LH channel dead/buzzing), a faulty analogue switch IC DG309CJ causing popping switching to/from tuner input amongst other
Linn LK-1 preamp and LK-2 power amp full service Read More »
Customer brought in a couple of Lux91 300B-based amps, one suddenly stopped working. First off noticed customer had inadvertently managed to remove and reinsert the 300B 4-pin valve rotated 90 degrees (as a ‘diy’ check swapping valves between units) prior to bringing to me which of course failed to fix anything. Thankfully nothing damaged being
Lux91 MonoMax monoblocks one dead Read More »
