|
It is currently 27 Apr 2024, 01:58
|
View unsolved topics | View unanswered posts
|
|
|
|
Author |
Message |
staffanu
|
Post subject: [CLD-95] B side play problems Posted: 17 Oct 2020, 13:14 |
Genuinely interested |
|
|
Joined: 24 Sep 2020, 02:47 Posts: 35 Location: Sweden Has thanked: 1 time Been thanked: 21 times
|
Hi,
I fixed a broken gear + dc motor in a CLD-95 recently, and now the player works again. It looks as if alignment in general is quite good since search times are normal and the picture seems fine. However, most of the times it won't play the b side of discs. There is no apparent pattern regarding what discs work and not.
The player spins up on the b side and I can hear (and see) the pickup moving up and down. So, I"m assuming a lack of focus. When fixing the optical assembly, I took the whole mechanism assembly out and also removed the top plate, so I'm thinking b side centering might be off. However, would that really affect focusing? Since I'm not sure I thought I have nothing to lose by trying to adjust it.
So, two questions: 1) is there anything else that is an obvious first thing to check? 2) I really cannot understand how to use the eccentric screwdriver to adjust this thing. The picture in the manual and one from reality are attached.
I guess the point is to move the whole thing horizontally, so I could probably figure out a way to do it, but I thought I'd ask before removing the seal that keeps it in its current place. Also, I do not actually have the GGV-129 eccentric screwdriver but found a picture here in the forum and ground down a screwdriver to something that I think would work if I only knew how:)
Any other pointers appreciated!
Staffan
Attachments: |
Service manual adjustment position.png [ 465.17 KiB | Viewed 3225 times ]
|
b-side centering adjustment-small.jpg [ 475.2 KiB | Viewed 3225 times ]
|
|
|
|
|
|
cplusplus
|
Post subject: Re: [CLD-95] B side play problems Posted: 19 Oct 2020, 20:34 |
Hardcore fan |
|
|
Joined: 13 Aug 2018, 03:18 Posts: 1520 Has thanked: 449 times Been thanked: 588 times
|
rein-o wrote: I think its the type of thing that is round with a pin on the other end but its not in the center, so when you turn it would rotate but pin is off center. Yep. Instrumental Parts will sell you one for $267.00 + shipping.
|
|
|
|
|
staffanu
|
Post subject: Re: [CLD-95] B side play problems Posted: 19 Oct 2020, 21:38 |
Genuinely interested |
|
|
Joined: 24 Sep 2020, 02:47 Posts: 35 Location: Sweden Has thanked: 1 time Been thanked: 21 times
|
There is a picture in this thread: https://forum.lddb.com/viewtopic.php?f=30&t=2521So yes, I know what it looks like, but I fail to see how it would be useful for the adjustment in question. I'm assuming there is an aha moment when someone explains it to me:) But the mechanism doesn't seem that complicated so I'll just move the thing... In the middle of another project right now but in a few days I'll report how it went. Staffan
|
|
|
|
|
krbahr
|
Post subject: Re: [CLD-95] B side play problems Posted: 21 Oct 2020, 00:47 |
Hardcore fan |
|
|
Joined: 10 May 2007, 03:12 Posts: 1521 Location: United States Has thanked: 0 time Been thanked: 337 times
|
cplusplus wrote: Kurtis, can something similar be done for the side A tangential adjustment that also calls for GGV-129? I use my modified screwdriver for that one.
|
|
|
|
|
cplusplus
|
Post subject: Re: [CLD-95] B side play problems Posted: 21 Oct 2020, 15:30 |
Hardcore fan |
|
|
Joined: 13 Aug 2018, 03:18 Posts: 1520 Has thanked: 449 times Been thanked: 588 times
|
krbahr wrote: cplusplus wrote: Kurtis, can something similar be done for the side A tangential adjustment that also calls for GGV-129? I use my modified screwdriver for that one. Thanks Kurtis. Time to find someone that can make this for me. staffanu- If you don't have an oscilliscope, centering is going to be a tedious trial and error situation of very, very small adjustments to hit the sweet spot. Does the pickup still try to focus on Side B?
|
|
|
|
|
cplusplus
|
Post subject: Re: [CLD-95] B side play problems Posted: 22 Oct 2020, 01:16 |
Hardcore fan |
|
|
Joined: 13 Aug 2018, 03:18 Posts: 1520 Has thanked: 449 times Been thanked: 588 times
|
staffanu wrote: Does it focus before spinning of the disc or after? The focus is "locked" then the spindle starts.
|
|
|
|
|
staffanu
|
Post subject: Re: [CLD-95] B side play problems Posted: 24 Oct 2020, 21:21 |
Genuinely interested |
|
|
Joined: 24 Sep 2020, 02:47 Posts: 35 Location: Sweden Has thanked: 1 time Been thanked: 21 times
|
Hi again,
Not much new information: I looked at the focus A+B signal when starting playback on side A a couple of times, and as expected it goes high (9-10 V) with some noise just after raising the pickup. On side B, nothing happens, i.e., not even noise. Solid 0V.
One time, out of maybe 20 attempts to start side B play, it did something different: the lens was moving up and down maybe 5 times until it gave up. Didn't measure that time, though.
Is it possible, or rather, it is likely, that something is broken in the pickup that makes it not work when upside down? I tried tilting the machine almost 90 degrees when B side play is about to start but no difference. (A somewhat dangerous maneuver since the disc wants to fall out when it gives up and doesn't clamp it anymore.) I would think that if say, some connection is slightly loose, playback would sometimes fail on the A side too...
Staffan
|
|
|
|
|
|
|
|
|
|
|
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments in this forum
|
|