Customer states unit exhibited a burning smell and sparks coming from fan area back right side of unit halfway through a performance and asked me to take a look to see what the issue was. First needed to repeat customer concern before doing anything in case act of opening up case changes something. Powered up […]
Dynacord Powermate 600-3 sparking behind fan Read More »
Customer had spent hours trying to find/fix a noise problem on their expensive microphone (just outside of warranty) so asked me to take a look, from the explained symptoms I suspected preamp valve noise, this microphone has the Abbey Road Studios REDD.47 preamp built in, and uses EF86 and E88CC valves. Repeated the problem (intermittent
Chandler REDD microphone intermittent noise 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 had this R2R in storage for over 15 years, came out to use and found that the capstan was not moving, but the reels would spin, asked me to take a look. Confirmed the symptoms, no capstan movement (and no motor whirr when tension arm lifted). Could see belt was non-existent but should have
Teac TASCAM 22-4 4 track 1/4″ R2R no capstan movement Read More »
Customer had original DX-7, presented with a nasty pop and burning smell, and a ‘dodgy’ output jack. This keyboard was made for servicing, a few screws and the lid hinges up. Lovely. Then the cause of the stink was obvious, infamous RIFA suppression cap gone south: Also noticed memory backup battery (soldered to board) which
Yamaha DX-7 repair and checkup Read More »
Customer states that this active speaker (part of a pair) was cutting out during performance and felt it was overheating. Despite the fan coming on, I was able to repeat the issue on the 1000W dummy load with a particularly bass-heavy piece of music driving fairly hard – the bass amp would cut out and
Alto TS112A Trusonic overheating Read More »
Using 0.75mm 3-core harmonised colour SY cable, with shield only connected at plug end:
Couple of shielded mains cables made up Read More »
Customer wanted a couple of ‘budget’ balanced cables made up to replace noisy single ended cables.
2 x 25ft TRS – XLR speaker cables made up 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 asked if could take a look at this speaker to see if it could be fixed. Why not?! Powered up and all seemed ok for a minute or so, but then as warmed up, could hear some very odd distortion occurring under load. Inside we have a module, which was getting very hot. This
dB Technologies Flexsys FM10 powered monitor speaker distortion Read More »
This customer’s RCF active speaker was apparently lent out and came back broken – unfortunately the negative rail mosfet and output transistors are short circuit, blew rail fuse – the woofer appears to have overheated and voice coil resulted in shorted turns which would have taken out the power amp (overdriven, probably clipping for ages!).
RCF ART310 Class-G active speaker repair Read More »
Customer was unable to continue running the FatTrack on 230V conditioned supply and was thinking it was overheating again. The rectified voltages from the original 2x115v primary 2 x 18v secondaries toroidal transformer should be 22V but on our 250V mains were measuring as high as 28V, the HT (from cascaded voltage doubler circuitry) should
Return of the TLA FatTrack! Read More »
I didn’t get such a good vibe when seeing the corrosion presented around the externals: And naturally the insides didn’t look too optimistic… (but this hasn’t been enough to decline repair in the past) However despite being one of the worst examples (with corroded broken tracks under the 10 way IDC socket too!), neutralised all
Another Linn Kairn battery leak Read More »
Customer stated their Focusrite interface no longer responds on Firewire, and had been repaired by Focusrite for the same problem in the past. Identified the TI TSB41AB2 Firewire IC as the most likely point of failure and managed to remove easily thanks to ChipQuik. In fact it was apparent that the IC was not properly
Focusrite Liquid Saffire 56 broken Firewire fix Read More »