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General Asylum General audio topics that don't fit into specific categories. |
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General Asylum General audio topics that don't fit into specific categories. |
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In Reply to: Returned from manufacturer with a 'clean bill of health' ? posted by AbeCollins on October 20, 2014 at 08:55:50:
If a piece of purely electronic gear (the only moving parts are switches) is two or five years old and the owner says it was checked over by the factory but claims that it was working perfectly, either the guy is not being upfront, or, he is a belt-and-suspenders kind of guy who is paying a very expensive insurance premium.
And in either case, he should be prepared to email a scan of the invoice for the checkover with nothing but his credit card info and home phone number obscured.
I think it's a totally different story when you are dealing with a piece of gear 15 years old that had hours of use every day. I know a guy who spent IIRC $1100 on various switches, relays, diodes and capacitors on an expensive solid-state preamp that was 15 years old, and when he sold it less than two years later, the fact that the then 17 year old preamp had had that work done (and he was willing to show the invoice) got him a good price.
Was that price $1100 "gooder" than had he not had that work done?
DUNNO!
I also think that things that have mechanical parts like CD drawers and transports and so forth are an in-between case. A really sophisticated repair shop (like Pyramid in Texas) can go deep inside a CD player's workings and see how well its tracking etc. systems are working. Seeing as there are reports that PayPal will now allow buyers to try to unwind transactions 6 months old, to be able to say that a CD player was gone over and got a clean bill of health might be worth the money if it comes to a dispute that needs resolution.
Here's an example of what I mean about CD players; the quoted price is checkover and minimal refurb (shipping extra); a player with more needs can be $600.
START QUOTE:
Denon DN-951FA DN-961FA CD Player
We stock the bearings, the motors and the lasers so we can turn them around in a couple of days. We know how to (and always do) properly set the tracking and servo gain, which most people don’t do. We have done hundreds if not thousands of these repairs over the last 20 years. Ok I looked it up, 1185 so far. Isn't it time to pull the barely working spare off the shelf and get it repaired?
High performance can be lowered by poor service. Watch out for the counterfeit laser that looks like the KSS-240a but has a 8 pin optical detector instead of 24 pins. The fake also has a different connector, not bad, just different and a red flag this is not the real thing Expect to pay $75 for the real thing 499 0191 009 also available at www.pacparts.com . The gears in the counterfeit aren’t cut very well and can be noisy.
Don't skip the laser alignment, which consists of setting the tracking and focus servo gains. We use an Audio Precision test set that makes it easy. Properly done the result is a clean Lissajous pattern. Afterwards the tracking error should look like a noise line with the track crossing centered on the line. Anything else and the $24 spindle motor bearing 425 0186 013 should be replaced. The RF signal should also be at least 900 mV peak to peak with a clear "eye" pattern.
Isn't it time to get it done right? This typical $199 repair includes replacing the laser and bearing, alignment and cleaning.
END QUOTE
ATB,
JM
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Follow Ups
- I think that you have semi-answered your own question - John Marks 14:08:46 10/20/14 (0)
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