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#1
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Nakamichi CR 7a question
I have no motion, i.e play fast forward and reverse.. By looking at my
other deck that works , it seems that the white plastic gears are not engaging. Is that a bad motor, a belt or somethign else TIA Who do you recommend to repair this? Abbedd |
#2
Posted to rec.audio.tech
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Nakamichi CR 7a question
"ansermetniac" wrote in message ... I have no motion, i.e play fast forward and reverse.. By looking at my other deck that works , it seems that the white plastic gears are not engaging. Is that a bad motor, a belt or somethign else TIA Who do you recommend to repair this? Abbedd I think I've heard of bad lamps causing this... Mark Z. |
#3
Posted to rec.audio.tech
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Nakamichi CR 7a question
On Sun, 7 Dec 2008 21:22:11 -0600, "Mark D. Zacharias"
wrote: "ansermetniac" wrote in message .. . I have no motion, i.e play fast forward and reverse.. By looking at my other deck that works , it seems that the white plastic gears are not engaging. Is that a bad motor, a belt or somethign else TIA Who do you recommend to repair this? Abbedd I think I've heard of bad lamps causing this... Mark Z. Are you trying to be funny? Abbedd |
#4
Posted to rec.audio.tech
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Nakamichi CR 7a question
In article ,
ansermetniac wrote: On Sun, 7 Dec 2008 21:22:11 -0600, "Mark D. Zacharias" wrote: "ansermetniac" wrote in message .. . I have no motion, i.e play fast forward and reverse.. By looking at my other deck that works , it seems that the white plastic gears are not engaging. Is that a bad motor, a belt or somethign else TIA Who do you recommend to repair this? Abbedd I think I've heard of bad lamps causing this... Mark Z. Are you trying to be funny? Abbedd Umm... no, I don't think Mark was trying to be funny. Some decks use lamps and light sensors to detect movement, and Nakamichi's are supposed to stop if proper tape movement isn't detected. In fact, the first VHS machines used incandescent lamps and light sensors (they still do, except they use IR LEDs) for the tape-end sensors. When these lamps burned out, which they did, the VCRs no longer worked. |
#5
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Nakamichi CR 7a question
On Dec 7, 2:56*pm, ansermetniac wrote:
I have no motion, i.e play fast forward and reverse.. By looking at my other *deck that works , it seems that the white plastic *gears are not engaging. Is that a bad motor, a belt or somethign else TIA Who do you recommend to repair this? Abbedd I'm not familiar with that particular unit, but the common problem with Nak decks is due to a worn "idler tire". I have a CR-1A with the same problem, but after looking at the replacement instructions, it wasn't for a novice like myself. Yours might be very easy to replace. I had the site that sells the tires and instructions saved, but have since deleted it once I realized I couldn't repair the deck myself. (I have a Pioneer CT-W910R so why bother) The tires are VERY cheap. So if you can make the repair yourself you're looking at about $5.00. This might be the guy that emailed me and told my that my deck was much more dificult to replace the idler tire on. http://www.eslabs.com/idler_2.htm |
#6
Posted to rec.audio.tech
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Nakamichi CR 7a question
"ansermetniac" wrote in message ... On Sun, 7 Dec 2008 21:22:11 -0600, "Mark D. Zacharias" wrote: "ansermetniac" wrote in message . .. I have no motion, i.e play fast forward and reverse.. By looking at my other deck that works , it seems that the white plastic gears are not engaging. Is that a bad motor, a belt or somethign else TIA Who do you recommend to repair this? Abbedd I think I've heard of bad lamps causing this... Mark Z. Are you trying to be funny? Abbedd Definitely not - in addition to motion sensing, they may use lamps as a sort of fuse involving the front panel functions. In other words if a Play indicator lamp would go out, the mechanical functions might be inhibited altogether. I know it sounds stupid, and I'm trying to remember something another tech told me 15 years ago, so I'm sorry I can't be more specific. Just wanted to alert you to the possibility. Mark Z. |
#7
Posted to rec.audio.tech
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Nakamichi CR 7a question
On Mon, 8 Dec 2008 06:31:25 -0600, "Mark D. Zacharias"
wrote: "ansermetniac" wrote in message .. . On Sun, 7 Dec 2008 21:22:11 -0600, "Mark D. Zacharias" wrote: "ansermetniac" wrote in message ... I have no motion, i.e play fast forward and reverse.. By looking at my other deck that works , it seems that the white plastic gears are not engaging. Is that a bad motor, a belt or somethign else TIA Who do you recommend to repair this? Abbedd I think I've heard of bad lamps causing this... Mark Z. Are you trying to be funny? Abbedd Definitely not - in addition to motion sensing, they may use lamps as a sort of fuse involving the front panel functions. In other words if a Play indicator lamp would go out, the mechanical functions might be inhibited altogether. I know it sounds stupid, and I'm trying to remember something another tech told me 15 years ago, so I'm sorry I can't be more specific. Just wanted to alert you to the possibility. Mark Z. Thank you for your help. I was referring to my previous request for lamps on the Thorens and thought you were making a joke. I should have realized that audio techies have no sense of humor :-) I have the service manual for the nak somewhere and will try to find it Abbedd |
#8
Posted to rec.audio.tech
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Nakamichi CR 7a question
On Sun, 07 Dec 2008 14:56:35 -0500, ansermetniac
wrote: I have no motion, i.e play fast forward and reverse.. By looking at my other deck that works , it seems that the white plastic gears are not engaging. Is that a bad motor, a belt or somethign else Does this model have a "Stop" lamp and is it lit? (Sorry, I've forgotten over the years). Is the capstan turning? Does the head bridge engage (pull up) when "Play" is pushed? A voltmeter across the reel motor's terminals (set for reading DC voltage) reads what, (Play?, FFwd?, Rwd?) All the best fortune, Chris Hornbeck |
#9
Posted to rec.audio.tech
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Nakamichi CR 7a question
On 8/12/08 9:31 PM, in article , "Mark D. Zacharias" wrote: "ansermetniac" wrote in message ... On Sun, 7 Dec 2008 21:22:11 -0600, "Mark D. Zacharias" wrote: "ansermetniac" wrote in message ... I have no motion, i.e play fast forward and reverse.. By looking at my other deck that works , it seems that the white plastic gears are not engaging. Is that a bad motor, a belt or somethign else TIA Who do you recommend to repair this? Abbedd I think I've heard of bad lamps causing this... Mark Z. Are you trying to be funny? Abbedd Definitely not - in addition to motion sensing, they may use lamps as a sort of fuse involving the front panel functions. In other words if a Play indicator lamp would go out, the mechanical functions might be inhibited altogether. I know it sounds stupid, and I'm trying to remember something another tech told me 15 years ago, so I'm sorry I can't be more specific. Just wanted to alert you to the possibility. Mark Z. Concur. Not a Nakamichi, but had a similar problem with an old Accuphase power amp. They have a small fuse-like lamp to illuminate the analogue VU meters. I lost a channel at the same time one of the lamps blew (but didn't make the connection at the time). Took me a while to figure out what caused the channel to go. After a bit of digging around I found out that the lamp doubled as a kind of fuse (still don't know what it was actually protecting), but I replaced it with a $1.00 lamp from the US and the channel recovered. Cheers Mal Oz |
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