I got a JVC RC656 Boombox, and i need help. Radio is working, but Cassette gives a deep humming, when "Play" is pressed. I have no knowledge in measurement and repairing electronics, so i`m looking for a good service, who can do a general overhaul , in Germany. My favorite is just overloaded with orders. Does anybody have a tipp ?
Maybe: https://www.audio-analogica.com/ Your best bet is generally to politely email professional outlets and ask if they can repair your devices, but also ask them "If you can't, could you please suggest someone who can?" Generally stores have real connections that we wouldn't even know about. I've been passed on to a lot of great servicers just by asking big outlets if they do repairs (and if not, who do they send the devices to?)
Thanx for the link . I wrote to about 10 profs - now there could be an option with a regional repair service.
Look up "record bar cleaning" on this forum, Cassette2go has a video on YouTube and there should be several threads on here discussing the issue. My last purchase, the Panasonic had a bad hum, luckily I got rid of it by hitting the record button a million times but sometimes you have to take it all apart. Also clean the function selector switch with DeOxit, it can also cause unwanted noises from being left in the same position for a long time. For some reason the video has horrible sound!
Here`s a little report of my efforts for now. First i cleaned the potis and selectors, pushed buttos one more time and looked for damaged elkos. So i had the first success - there was no more humming, when Play was pushed - and i was able to play cassette. Amazingly without greater yelp, flutter - constant speed. But i wasn`t able to hold record button in pushed position - it didn't click into place. I expanded the mechanic parts, and cleaned some parts, also looked at the motor. The rubber rings under the fixing screws were damaged - only crumbly stuff - i removed it, and tried to substitute with own cutted special plastic slices. Now i can play cassettes, and record button is in right position after pushing. But now the tape speed is too slow, and the tone is swaying - i have to adjust this, but i don`t know , how to do this. The belt seems to be OK, but i think, the reason could be the changed motor position. And I want to buy new belts. To be continued.
Just like any of these players, get out the microscope and look for tiny pieces of gooey rubber, it will slow rotating parts down. Most motors have a round opening on the back for access to a slotted screw for messing with the speed. I rarely have to go there since the issue is more often the usual suspects, rollers, belts, sticky residue. Does the pinch roller look ok, if it gets hard the tape won't move through nicely. We have a product called Rubber Renue over here that sometimes helps and gives you some extra life.
Jvc 656C Mark II with the blue speakers and open mesh grills, I have the same model as you. Mine works perfectly and for sale if you interested in buying it. decentman4you2007@gmail.com and in the background is a pair of JVC RC-770jw and they both have Dolby for the cassette playback. And I made videos about those as well in my cassette2go youtube channel when I repaired them last. I'm in Dallas, Texas, USA.
Now i have new informations - it seems, that the take-up roller is slipping through - the bandspeed isn`t constant. I have changed the belt, its tension is OK. May be , the rubber of the roller has become too hard - it can`t take the driven part with it. What can i do, to reactivate the roller ? Or is there anybody who has a irreparable JVC ( or other compatible ) to sell parts ? I tried to remove the rubber - there is too much tension on the roller.
I use a straight pick two of them and I can work that tire off of The plastic wheel. Yes, there's a lot of tension because it's a small rubber tire. As far as getting one off of another old machine is going to be the same issue because it's also going to be worn. You need to replace it with a new tire that's why they sell them.
You have to measure in millimeters, the ID, the OD and the thickness and then search Google for idler tire and you'll find it Basically 2 mm thickness and the ID is all you really need to be concerned with I know because I have bought them and I'm still searching for them on occasion
Your part number may not correlate to anything present day, but if you measure the ID and I'm pretty certain it's roughly 2 mm thickness, you'll find what you're looking for remember to look using millimeters because rarely do they sell idler tires by inches
