Самородков и разговоров у нас много, но вот ответа на свой вопрос я не получил. Зато первый же гугл на тему выдал исчерпывающий ответ на мои “болячки” и чего с ними делать от “тупых америкосов”:
- По проблеме медленного подвода роликов, как я и предполагал:
Tape plays fast for the first second or two and then suddenly plays normal
This is most likely caused by hardened grease on the pinch roller pivots which plague the Nakamichi standard transport decks. Take the cassette door off and without a tape put the deck into play. The pinch rollers should engage the capstans without any delay. Press down on the pinch roller. Once you press down enough to overcome the spring it should move freely. If this is not the case then the pivot needs to be cleaned and new oil added. Try using 99% or greater alcohol on the pivot while moving the pinch roller to work it in. This may or may not work depending on how hard the grease is. If it doesn’t get easier after about a half hour then the whole pinch roller will need to be removed. Note: This will require realignment of the tape guides after reassembly. This is a job that requires a trip to a competant service person who has the required gauges. The pinch roller pivot pin is just pressed into the white plastic. Carefully grab the pin and gently rotate it back and forth while pulling on it. Once out you can use harder chemicals like MEK to remove the hardened grease. Clean thoughly, apply new grease like molytone or lithium grease. Reassembly by slowly pushing the pn back into the plastic of the transport.
- По проблеме погасшего индикатра, как и предполагал - кондёр:
VU meter on one side is pegged or work intermittantly
This has be noted on 580 and 680 series decks. One channel is pegged and the other channel works fine. It’s most likely orange cap disease. Try replacing C117, C119, C120, C217, C219, C220 and C326 on the 580 board. On the 680ZX try replacing C901, C902, and C903 on the FL Indicator module. On the 680ZX the problem is most likely C901, which I think is 4700pF.
Вот и все понятно, попробую сделать сам.
Кстати, рекомендации по очистке головок и роликов - не использовать жидкости с содержанием алкоголя ниже 98%, так как хуже нет для головы, чем попадание воды. Т.е. использовать нужно то, что быстро испаряется с как можно меньшим остатком воды.
Head and Pinch Roller Cleaning
There has been a lot of discussion on NakTalk over the years regarding head cleaning. First I’ll start with the No, No’s. Do not use drug store alcohol with a purity of less than 98%. Standard rubbing alcohol or isopropanol is typically only 70% pure alcohol with the rest being water. Denatured alcohol is Ok since it contains 99% ethyl and methyl alcohol with only trace amounts of water.
Just about everyone has their own ideas on what to use. I’m not sure what Nakamichi officially says, but, when I used to go to the Nakamichi parts department in Torrance, CA they had a display on the counter for American Recorder’s Intraclean S-711 head cleaning solution. They were careful to say that they are not officially endorsing their product, but, they did say that they use it on all the decks that come in for service. Unfortunately S-711 is no longer available because of a ban on 1,1,1 Trichloroethane. American Recorder now has Intraclean S-721H which is pure Hexane. S-721H is $15 for a 2 ounce bottle that should last the home user virtually forever. With some of the older high end Naks they included a small cleaning kit containing a bag of cotton swabs and a small bottle of what I believe is just isopropyl alcohol (probably 90% or better, not sure). While this kit was included with some decks it is not recommended because of the possible high water content. The important thing is to use something that will evaporate quickly and not sit there. The worst thing is if water sits on the metal parts. (S.J.)
Some people like using an old Ampex head cleaning solution from the 50’s & 60’s. It is basically carbon tetrachloride. It works great, but, was banned many years ago because of it’seffect on the ozone layer. American Recorders Intraclean S-711 is no longer available either because it’s ingredient 1,1,1 Trichloroethane also deplets the ozone layer and has been known to cause cancer.
Stephan Sank says he uses MEK (Methyl Ethyl Ketone). It’s cheap and an excellent cleaner, but, is known to cause cancer and can royally screw up plastic. Use in a well ventilated area and don’t let it touch anything except the heads and pinch roller. It will melt the plastic parts and can even cause damage to the anodized aluminum front panel.