Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
Hi,
I have a Nakamichi CD Player 3, circa 1992, that is a terrific player, but requires to be warmed up for about 1.5 hours before it is able to read the disc; After this point, then it works fine. I am not sure why the warm up needed, but it is drag when you have to build in this lead-time into your CD listening. Any thoughts as to why this is happening and steps to remedy will be most appreciated.. Thanks |
#2
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
I have a Nakamichi CD Player 3, circa 1992, that is a terrific player, but requires to be warmed up for about 1.5 hours before it is able to read the disc; After this point, then it works fine. I am not sure why the warm up needed, but it is drag when you have to build in this lead-time into your CD listening. Any thoughts as to why this is happening and steps to remedy will be most appreciated.. ** Might be sticky lubricant on moving parts. Do not tackle it yourself - take it to an experienced audio tech. ..... Phil |
#3
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
I have a Nakamichi CD Player 3, circa 1992, that is a terrific player, but
requires to be warmed up for about 1.5 hours before it is able to read the disc; After this point, then it works fine. I am not sure why the warm up needed, but it is drag when you have to build in this lead-time into your CD listening. Why not just leave it on all the time? You didn't indicate what happens when you load the disk from a cold start. Does the disk spin up? If so, that suggests it might not be sticky lubricant. (Phil, when was the last time you saw a consumer-electronics product with sticky lubricant?) My gut feeling is that it's an intermittant laser diode. You might want to read through these postings... http://audiokarma.org/forums/showthread.php?t=279179 http://audiokarma.org/forums/showthread.php?t=275220 You might also go to JustAnswer. The quality of their response varies, but they do have some knowledgeable people. Regardless, this could be the sort of problem that eats up huge amounts of expensive diagnosis time, to no effect. |
#4
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
"William Sommer****** = Criminal TROLL FOAD you stinking pile of autistic, sub human garbage. ... Phil |
#5
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to readdisc
On 26/11/2011 14:18, Phil Allison wrote:
"William Sommer****** = Criminal TROLL FOAD you stinking pile of autistic, sub human garbage. For the google tape, Phil is knowlegable but has problems expressing himself. Someone told him that he is a 'stinking pile of autistic, sub human garbage' and this phrase has stuck in his memory as useful to be fired back as insult. He is unique. Googling finds no one else on the net has ever uttered "stinking pile of autistic" other than him. We should start a list of these 'insults', record the date and times and corrolate them against phases of the moon, tides, hormones cycles or something. Could there be a useful discovery? BTW I feel valued items of audio equipment that the user has an obvious personal relationship shouldn't be mucked about with as possible heartbreak lies that way. The worst is to have some user let loose lubricating it with WD40 or some other left-field third-hand cure, and then have both user and machine spend some time with the applicable medics, both having expensive repair sessions. How much does/did Phil's treatment cost? -- Adrian C |
#6
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
"Adrian C" wrote in message
... I feel valued items of audio equipment that the user has an obvious personal relationship shouldn't be mucked about with, as possible heartbreak lies that way. The worst is to have some user let loose lubricating it with WD40 or some other left-field third-hand cure, and then have both user and machine spend some time with the applicable medics, both having expensive repair sessions. How much does/did Phil's treatment cost? Phil didn't suggest any treatment, other than taking the unit to a qualified service technician. (Just try finding one.) But unless the "warm up" problem is known and well-understood, the technician is likely to spend a lot of expensive service time tracking it down. |
#7
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
wrote in message
... Hi, I have a Nakamichi CD Player 3, circa 1992, that is a terrific player, but requires to be warmed up for about 1.5 hours before it is able to read the disc; After this point, then it works fine. I am not sure why the warm up needed, but it is drag when you have to build in this lead-time into your CD listening. Any thoughts as to why this is happening and steps to remedy will be most appreciated.. Thanks I would assume the focus voltage is drifting a bit and out of capture range until warmed up. Find the power pot (preset) measure R both ways and mark with pen and adjust lower first one way and try and then the other no more than 5 percent and see if it makes a difference |
#8
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
On Sat, 26 Nov 2011 07:16:08 -0800, "William Sommerwerck"
put finger to keyboard and composed: "Adrian C" wrote in message ... I feel valued items of audio equipment that the user has an obvious personal relationship shouldn't be mucked about with, as possible heartbreak lies that way. The worst is to have some user let loose lubricating it with WD40 or some other left-field third-hand cure, and then have both user and machine spend some time with the applicable medics, both having expensive repair sessions. How much does/did Phil's treatment cost? Phil didn't suggest any treatment, other than taking the unit to a qualified service technician. (Just try finding one.) But unless the "warm up" problem is known and well-understood, the technician is likely to spend a lot of expensive service time tracking it down. The OP could try starting the unit upside down. This may shed some light on the nature of the fault. He could also kickstart the disc by spinning it manually. - Franc Zabkar -- Please remove one 'i' from my address when replying by email. |
#9
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
"William Sommerwerck" wrote in message
... I have a Nakamichi CD Player 3, circa 1992, that is a terrific player, but requires to be warmed up for about 1.5 hours before it is able to read the disc; After this point, then it works fine. I am not sure why the warm up needed, but it is drag when you have to build in this lead-time into your CD listening. Why not just leave it on all the time? You didn't indicate what happens when you load the disk from a cold start. Does the disk spin up? If so, that suggests it might not be sticky lubricant. (Phil, when was the last time you saw a consumer-electronics product with sticky lubricant?) My gut feeling is that it's an intermittant laser diode. You might want to read through these postings... http://audiokarma.org/forums/showthread.php?t=279179 http://audiokarma.org/forums/showthread.php?t=275220 You might also go to JustAnswer. The quality of their response varies, but they do have some knowledgeable people. Regardless, this could be the sort of problem that eats up huge amounts of expensive diagnosis time, to no effect. I have seen the main power supply filter cap open up on these. Also shorted spindle motors. Mark Z. |
#10
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
I've seen the main power supply filter cap open up on these.
And I've seen "bad" caps temporarily get better after a period of time. Sounds like a good place to start checking. And PS caps are generally easy to replace. |
#11
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
"William Sommerwerck" wrote in message
... I've seen the main power supply filter cap open up on these. And I've seen "bad" caps temporarily get better after a period of time. Sounds like a good place to start checking. And PS caps are generally easy to replace. I should have mentioned that the aforementioned filter cap can result in symptoms similar to those reported by the OP. In the particular one I had, the shrink wrap of the capacitor had this weird bubbly texture. On close examination, the corrosion we often see underneath these things had grown and spread like a cancer under the plastic wrap. Weird. Mark Z. |
#12
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
"William Sommerwerck" wrote in message ... I have a Nakamichi CD Player 3, circa 1992, that is a terrific player, but requires to be warmed up for about 1.5 hours before it is able to read the disc; After this point, then it works fine. I am not sure why the warm up needed, but it is drag when you have to build in this lead-time into your CD listening. Why not just leave it on all the time? You didn't indicate what happens when you load the disk from a cold start. Does the disk spin up? If so, that suggests it might not be sticky lubricant. (Phil, when was the last time you saw a consumer-electronics product with sticky lubricant?) Actually, Phil is quite right. I see sticky lubricant all the time on CD player laser rails, swinging-arm idlers on cassette decks, bits of autochange mechanism on phono decks ... Arfa My gut feeling is that it's an intermittant laser diode. You might want to read through these postings... http://audiokarma.org/forums/showthread.php?t=279179 http://audiokarma.org/forums/showthread.php?t=275220 You might also go to JustAnswer. The quality of their response varies, but they do have some knowledgeable people. Regardless, this could be the sort of problem that eats up huge amounts of expensive diagnosis time, to no effect. |
#13
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
"William Sommerwerck" wrote in message ... "Adrian C" wrote in message ... I feel valued items of audio equipment that the user has an obvious personal relationship shouldn't be mucked about with, as possible heartbreak lies that way. The worst is to have some user let loose lubricating it with WD40 or some other left-field third-hand cure, and then have both user and machine spend some time with the applicable medics, both having expensive repair sessions. How much does/did Phil's treatment cost? Phil didn't suggest any treatment, other than taking the unit to a qualified service technician. (Just try finding one.) But unless the "warm up" problem is known and well-understood, the technician is likely to spend a lot of expensive service time tracking it down. With all due respect William, that it utter nonsense. Any half way decent technician, who understands the finer points of how a CD player works, will have enough experience under his belt to readily get a handle on what is causing the problem, whether he knows the specific player, or not. As you very well know, there are sequences of well-defined events that all players follow more or less, between inserting a disc, and actually playing it. Whichever of the phases is failing in the case of this particular player, will be readily identifiable to the experienced eye. The only way that could then go tits up in terms of getting a fix, would be if the problem turned out to be some really obscure electronic one, that isn't power supply related. Such faults are actually exceedingly rare. In any case, as the problem appears to be temperature related, even if it did turn out to be electronic rather than mechanical or the laser itself, it should be able to be found without fuss using a hot air source, and a can of freezer. Arfa |
#14
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
"N_Cook" wrote in message ... wrote in message ... Hi, I have a Nakamichi CD Player 3, circa 1992, that is a terrific player, but requires to be warmed up for about 1.5 hours before it is able to read the disc; After this point, then it works fine. I am not sure why the warm up needed, but it is drag when you have to build in this lead-time into your CD listening. Any thoughts as to why this is happening and steps to remedy will be most appreciated.. Thanks I would assume the focus voltage is drifting a bit and out of capture range until warmed up. Find the power pot (preset) measure R both ways and mark with pen and adjust lower first one way and try and then the other no more than 5 percent and see if it makes a difference Or don't, unless you are thoroughly experienced in carrying out such adjustments ... :-\ Arfa |
#15
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
"Arfa Daily" wrote in message
... How much does/did Phil's treatment cost? Phil didn't suggest any treatment, other than taking the unit to a qualified service technician. (Just try finding one.) But unless the "warm up" problem is known and well-understood, the technician is likely to spend a lot of expensive service time tracking it down. With all due respect William, that it utter nonsense. Any half way decent technician, who understands the finer points of how a CD player works, will have enough experience under his belt to readily get a handle on what is causing the problem, whether he knows the specific player, or not. As you very well know, there are sequences of well-defined events that all players follow more or less, between inserting a disc, and actually playing it. Whichever of the phases is failing in the case of this particular player, will be readily identifiable to the experienced eye. The only way that could then go tits up in terms of getting a fix, would be if the problem turned out to be some really obscure electronic one, that isn't power supply related. Such faults are actually exceedingly rare. In any case, as the problem appears to be temperature related, even if it did turn out to be electronic rather than mechanical or the laser itself, it should be able to be found without fuss using a hot air source, and a can of freezer. As you many years' more experience than I in practical servicing, I ought not to defend my position, as you are much more likely to be "right" than I. However... I'm fond of pointing out that the "correct" path of diagnosis is not asking what's wrong, but of asking what isn't wrong. The analytical point that needs attention is the 90-minutes needed before the unit starts operating. * If it's a conventional heat-related problem, why does it take so long to appear? Ergo, it (probably) isn't a conventional heat-related problem. Please note what I said... "...unless the "warm up" problem [with this unit] is known and well-understood, the technician is likely to spend a lot of expensive service time tracking it down." I stand by that. Most electronic equipment reaches operating temperature within 20 minutes or so. I suspect there's either some screwy problem with an IC that's going to require a speculative replacement, or there's a flaky cap or two in the power supply. (I'm leaning to the latter, because I've seen it in my own equipment.) I would very much like to know what it turns out to be. If I'm wrong, I'll publicly apologize. If right, I will restrain my glee. * The OP hasn't told us what happens when he turns the working player off for a few minutes, the on again |
#16
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
"Arfa Daily" wrote in message
... "N_Cook" wrote in message ... wrote in message ... Hi, I have a Nakamichi CD Player 3, circa 1992, that is a terrific player, but requires to be warmed up for about 1.5 hours before it is able to read the disc; After this point, then it works fine. I am not sure why the warm up needed, but it is drag when you have to build in this lead-time into your CD listening. Any thoughts as to why this is happening and steps to remedy will be most appreciated.. Thanks I would assume the focus voltage is drifting a bit and out of capture range until warmed up. Find the power pot (preset) measure R both ways and mark with pen and adjust lower first one way and try and then the other no more than 5 percent and see if it makes a difference Or don't, unless you are thoroughly experienced in carrying out such adjustments ... :-\ Arfa In my experience fooling around with the adjustments rarely actually fixes a malfunction, they merely mask or compensate for what is actually wrong. For example, increasing the tracking gain might (temporarily) seem to fix a skipping problem, when the actual problem is bad lubrication on the laser mechanical path (rails, etc as Arfa mentioned). Diddling with the adjustment pots is best reserved for after parts replacement or other service, and should be done by a knowledgeable hand, preferably with service literature available. Mark Z. |
#17
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
On Mon, 28 Nov 2011 05:41:17 -0600, "Mark Zacharias"
put finger to keyboard and composed: "William Sommerwerck" wrote in message ... I've seen the main power supply filter cap open up on these. And I've seen "bad" caps temporarily get better after a period of time. Sounds like a good place to start checking. And PS caps are generally easy to replace. I should have mentioned that the aforementioned filter cap can result in symptoms similar to those reported by the OP. FWIW, I had the same problem in an old Tevion DVD player (Aldi supermarket brand). - Franc Zabkar -- Please remove one 'i' from my address when replying by email. |
#18
Posted to sci.electronics.repair
|
|||
|
|||
Nakamichi CD Player 3 - needs to heat before it's able to read disc
"Arfa Daily" Actually, Phil is quite right. ** Of course he is. I see sticky lubricant all the time on CD player laser rails, swinging-arm idlers on cassette decks, bits of autochange mechanism on phono decks ... ** The Naka in question is 20 ****ing years old - FFS !! If the lubricant is NOT sticky by now, it would be a miracle. This kind of trouble, or any other fault that creates a repeatable 90 minute delay prior to use, is NOT one an owner can fix himself. That Somer****** STEAMING GREAT NUT CASE is a 100% public menace who should have a price on his head - wanted dead or alive. .... Phil |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
FA: HIGH END Nakamichi OMS-7 CD Player (parts or repair) | Electronics Repair | |||
Sony DVP-570D will not read a disc | Electronics Repair | |||
Playstation 2: Disc read error | Electronics Repair | |||
Nakamichi MB-4S 7 CD Player - Problem | Electronics Repair | |||
Nakamichi MB4-S - 7 Disc Music Bank System - Load Mechanism Fault | Electronics Repair |