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JVC AX-R551 amp, fuse? or toasted?

Hi,

I have a JVC AX-R551 stereo amplifier, and last night, a half can of beer found it's way into the cabinet, mostly toward the rear left where the extra power outlets are, and I assume a transformer. The music just cut out, and I tried immediately to get as much as the liquid out immediately.

I tried a hair dryer to help dry things out, and also left a fan blowing on the components all night with the cover off.

The red stanby/on light still glows when in the "off" mode, but when I press the power button, nothing lights up or works of course, but I can hear what sounds like a relay toward the front left side, but that's it,

I cannot find where they put the fuses, as inside with the cover off, there's a sticker that says to be sure to replace the fuse with the same type as supplied. I know usually the fuses are usually on the back of cabinet on most stereos, where you unscrew it, but I don't see anything there, and nothing inside with the top cover removed. so where should I look? I do not know how to repair besides changing the fuse.

Does this model even have a fuse or is it completely toasted? Again, some power is getting thru to make the stanby light glow, and a relay click. Thanks much.

Reply to
dke3591
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Oh dear....

That'll just make all the sugary gunk congeal wherever it ended up..

Graham

Reply to
Eeyore

I'll reply in the 'hypothetical' -- your risks are your own. If it were _my_ amp, I would immediately disassemble it to reveal the chassis, take it into a bathtub, and using a sprayer hose and head with the hottest water possible, spray all the disassembled components from every angle, sprinkle a quality liquid dishwashing detergent (good degreasing and wetting properties) over all surfaces, and repeat the high pressure hot spray until suds run clear. I would remove the amp to a dry, preferably sunny spot and use compressed air or the 'cool' setting on a hair drier to extract as much water as possible. If using compressed air, I would be careful to regulate its application to avoid detaching labels and sensitive parts. Then I would bake it (in the sun if you are in a summer climate or using applied hot air if not) for at least five hours. I would let it sit for several more days in a dry, well ventilated place and then I would begin to troubleshoot it under power.

I routinely clean electronic equipment; one always needs to carefully evaluate where in a device water could collect and not be removable without disassembly -- membrane keyboards are a good example; they need to be disassembled to clean and dry the various layers or they will corrode or become unreliable after being wet. Be careful of power and output transformers; moisture can compromise insulation and they can fail under power unless fully dried (baked). Moisture can short mica insulators on semiconductors and with fine pitch smt it can be disastrous if not fully removed.

Good luck.

Michael

parts of the chassis

Reply to
msg

If there are PCBs mounted on the main ( as opposed to the standby ) power transformer, fuses may well be located on the undersides of those boards. There are often 5mm holes in the PCB above such fuse locations, so that you can see the state of the wire in the fuse, without having to remove it, whch can sometimes be a very fiddly task. It has been very rare indeed to find any fuses on the rear panels of ordinary domestic hifi rigs for 20 years or more.

Arfa

Reply to
Arfa Daily

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