The current jumped up and kissed me quite good with 240 volts (and the amp was turned off! Forgot to unplug it of course. It was 4 in the morning so I was not so clever at that point)īy the way I learnt my first noob lesson: Never ever hover with your hand above the AC mains. Any ideas? (maybe I accidentally put the ins where the outs where supposed to be. The last thing to do now is to put the reverb connections back, but when I tried yesterday it was humming so much that I decided to disconnect it and leave it for now. Now I have a switch that lets me choose from symetrical clipping, asymetrical (tube-ish) clipping and diode bypass (witch make it sooo clean more like a fender amp. So then I took on the diode clipping section were I screwed up last time. I wanted to see if there was any heat or smell developing but there was nothing, so I pulled the plug and soldered the TDA2050. Well, since I know nada about making any meaningful measurements I just checked the pcb for any burns, dark spots and old solder crap from previus experiments and then I turned it on with the old amp circuit removed. I meant that I wanted to measure for expected values on the pcb to look for other faulty components before putting in any new (I see why I was misinterpreted). Here is the schematic for the Vox Pathfinder thanks for your input. Features15W of power8' Bulldog speakerGain boostTremoloSpring reverb2-band EQ (treble, bass)Tremolo speed and depth controlsBoost and tremolo are footswitchable Headphone output with internal speaker muteLine out DI jackSpeaker outBasket-weave vinylDiamond. I'd be thankful for any answers that could help me bring my Vox to life Dimensions: 15-1/2'W x 15-3/4'H x 7-5/8'D Weight: 18 lb. How can I measure if other components were damaged? Don't know what values to look for or where on the PCB to make the measurements TDA2050) without changing other circuits on the board? If so, what should I look for?Ģ. Do I need to replace it with the exact same component or can I use a similar one with the same pinouts (e.g. gives you a good sounding signal for recording or live work without having to mic up the amp. After sitting too long I lost focus and accidentally shorted the diode circuit witch in turn burned the TDA2030a component. I was trying out some different combinations of diodes to get a different character in the diode clipping section.
#Vox pathfinder 15r live how to#
I did search to try to understand how to find a suitable replacement for the TDA2030a in my amplifier but since I'm just learning I'm need some guidance of what I can do and what not to do. You'll need new thermal paste.This is my first post in this forum so i really hope I don't violate all rules in the book. These may be reusable if you clean them up. You can see the insulating mica sheet and shoulder washer in your picture. The metal tab needs to be insulated from the aluminum part. At 4 for a replacement, it's probably economical to whack a new. If the magic smoke came out of the IC, it's suspect. I was going to suggest checking the power supply and everything around the TDA2030A, especially C26, D2, and D3. One more thing: Make sure you mount the new power amp chip properly. It might be a good idea to replace the main filter caps (C35 and C36 2200F 25V) and C26 (1F 50V) just in case. If they drop ~0.6V when forward biased, they're probably fine.Įverything else in the circuit comes after the regulators, so as long as the zeners didn't fail open everything else should be fine. The fuse probably blew before they got too hot, but you can test these with a multimeter.
ZD1 and ZD2 are used as shunt regulators. You can replace them if you want they're very inexpensive. They're rated for 100V and are just there for protection.Ĭ24 and C25 are probably fine. It features 15W of power, a single 8' Bulldog speaker, gain boost, tremolo, and spring reverb. This player-friendly combo packs a ton of top-notch features and killer VOX sound into a package thats affordable and easy to use. It might be worth the extra couple dollars to replace them just in case though.ĭ2 and D3 are fine. Pathfinder 15R review by Vox UG Team 08:59 AM UG Team + bio Sound: 7 Overall Impression: 7 Reliability & Durability: 6 Features: 7 Reviewer's score: 6.8 Neat Users' score: 8. You wont have to dig deep to get great sound out of the VOX Pathfinder 15R Guitar Amp with Reverb. If you don't see any indication of failure, they're probably fine. Naviga tra le migliori offerte dei negozi di strumenti musicali. If you put too much voltage across an electrolytic cap, it will often leak (or explode). Cerca lusato tra migliaia di annunci di vendita di privati. The TDA2030A has an absolute maximum supply voltage rating of ☒5V and you (theoretically) fed it ±46V. You would have exceeded their voltage rating with your 230V mistake, but they may have been protected somewhat from the overvoltage when IC4 failed.
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