As I suspect & believe it is a form/type of acid.ģ90FE is right on about using caution as it can cause damage. After the application & you see it is etched (can tell by it turning dull grey) clean any extra off. I would suggest putting the chemical on a Q-Tip so you can give a more precision application without it getting on parts it is not ment to get on. I got a cassette deck that someone had used the chemical on & some ran down into the pinch roller axle & seized it up. If doing the chemical etching you need to be very careful as to NOT get ANY of the chemical on ANY OTHER parts OR too far down the capstan/too close to the capstan bushing/bearing as IT WILL corrode & rust up parts & cause them to seize up. And make sure you mask off the area that rides in the capstan bushing/bearing & a touch past the bearing so the capstan is smooth in the bearing area as it should & needs to be. If doing the media blasting use glass beads on low pressure as sand woud be too harsh IMEO. Man I was hoping it would be feeling better today.I need to CAUTION you all on EITHER method of returning the matted finish to the capstan (and for that matter NOT all capstans had a matted grey finish). Guess it's back to the shop to see if they can figure it out. Update from today, the tendency to slow down and stop is back. It could take a while to get it back to full health. Add to that the fact that it has not been used in years. I hope I don't have to take it back to the shop but it's a 31 year old deck by my estimation from the info on vintage cassette. It was sounding perfect after getting those interconnects properly seated. It started shutting off and playing slow but I have 30 days warranty on the work so I want to give it some time. *tongue* Actually it might have to go in for another little check up. I've run this deck about 4 plus hours today and it was beginning to act like it was tired so it is resting now. The collars on the new cables seemed a bit tight so I pulled them, loosened the collars a little and they seated perfectly. Got the flash light out so I could see better and sure enough on the receiver end both right sides were not fully seated. I kept hearing a little something on playback and record and it finally hit me, that's the sound you get when the interconnects are not fully seated. It is big, heavy, and looks so fine next to my Sansui. Mainly during record do you push play and record or just record? I just have the feeling I am really going to like this tape deck. Hi-fi engine didn't have it listed so I have some questions for owners/users of similar tape decks. I still haven't found an owners manual for this one. *thumbsup* It also has Dolby B another *bigthumbup* from me on that too. Might or might not with this one unless I can come up with some money for one of those Phoenix tapes some time. Although I have never used metal tape in all the years I had my JVC KD-D3. This one can play/record normal, type II, and metal. So I told them if they can't find the right ones don't worry about that I can put some soft light on the face to brighten them up using some battery powered led lights. I'm hoping they can put lights in the VU meters but understand the bulbs are not an easy find. Getting kind of antsy to get my new baby back so I can play some tape and record some too. I picked it up for about $20 and am having the shop I use give it some attention right now. This deck is new to me but been around since about 1979 according to the Vintage Cassette site.
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