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sony 200 disc changer doesn't see disc

J

jd

Jan 1, 1970
0
If u need the model number for the 200 disc changer I will get it,
don't think u will though. I installed a new laser sled asembly. It
seems to be balanced. It is spinning fast and not touching anything. I
have the 2 ribbon cables snug in place. It says something like "please
insert disc" on TV while disc is spinning. Disc is in the right way.
ANy suggestions?

jd
[email protected]
 
J

JVC dude

Jan 1, 1970
0
did you remove the solder blob shorting/protecting the new laser!
 
J

jd

Jan 1, 1970
0
JVC dude said:
did you remove the solder blob shorting/protecting the new laser!

I'm in computers not electronics...lol. So it is probably something
easy like that. However I don't know what that is. I can I'm sure
guess pretty close. I saved the old asembly and the 2 lasers look the
same. I think I remember taking something off of the laser, but it
would have been something that was real noticeable. Please start
simple as u did, because this most likely has something to do with my
installation.
thnx JVC dude.
 
M

Mark D. Zacharias

Jan 1, 1970
0
jd said:
I'm in computers not electronics...lol. So it is probably something
easy like that. However I don't know what that is. I can I'm sure
guess pretty close. I saved the old asembly and the 2 lasers look the
same. I think I remember taking something off of the laser, but it
would have been something that was real noticeable. Please start
simple as u did, because this most likely has something to do with my
installation.
thnx JVC dude.

As someone else suggested, there should be a protective solder "blob"
somewhere on the pickup pc board, cable, or in the case of some later Sony
models I've seen, the solder blob which must be cleared is on the little
board on the side of the mech where the cables take off to the main unit.
Visible from the TOP side. In fact, it should be unsoldered AFTER plugged
into the circuit.

Mark Z.
 
J

jd

Jan 1, 1970
0
As someone else suggested, there should be a protective solder "blob"
somewhere on the pickup pc board, cable, or in the case of some later Sony
models I've seen, the solder blob which must be cleared is on the little
board on the side of the mech where the cables take off to the main unit.
Visible from the TOP side. In fact, it should be unsoldered AFTER plugged
into the circuit.

Mark Z.

ok there is short soldering required in one place. The only place I
can see that has a blob is actually on the ribbon cable as it comes
off of laser. The blob only covers 1 line. Is that the problem? I
looked on the old one and the place where the blob was is flat, but u
can tell there was one there. So, do I need to find a short solder guy
at this point? lol. Never done it, so...
I got a friend in electronics, so I am going to give him a call at
this point, but please post anything else plus thank you for getting
me in the right direction. I will post with an update as well.

jd
 
J

jd

Jan 1, 1970
0
ok there is short soldering required in one place. The only place I
can see that has a blob is actually on the ribbon cable as it comes
off of laser. The blob only covers 1 line. Is that the problem? I
looked on the old one and the place where the blob was is flat, but u
can tell there was one there. So, do I need to find a short solder guy
at this point? lol. Never done it, so...
I got a friend in electronics, so I am going to give him a call at
this point, but please post anything else plus thank you for getting
me in the right direction. I will post with an update as well.

jd

can someone affirm that this is the place that needs to be soldered.
It says the unit has to be installed, so I have to turn the entire box
to get to where the blob will drip down? Can I just hook up the ribbon
cables, not mount the entire sled, remove the blob, unhook the cables,
then mount. Or can u not unhook the cables once the blob is removed?

thnx again
 
M

Mark D. Zacharias

Jan 1, 1970
0
Can I just hook up the ribbon
cables, not mount the entire sled, remove the blob, unhook the cables,
then mount. Or can u not unhook the cables once the blob is removed?

thnx again

It's best, but not absolutely necessary to unsolder the protective solder
pads while they're plugged into the circuit. (The player of course is
unplugged from the wall!)
Ideally, if you need to unplug the flat cables, the solder pads should be
resoldered.

Some players are not designed quite so intelligently, and the solder must be
removed prior to installing the pickup.
A anti-static strap comes in handy for this. It's another technician aid -
most of us have one but don't use it that often.

Mark Z.
 
J

jd

Jan 1, 1970
0
Woo hoo !!!!!!!!!!

Done and done. Thank you so much everyone for all of ur help. I would
have never of figured that one out on my own. I was able to remove
blob with it mounted and everything. I thought it was going to be hard
to reach, but it wasn't. Awesome.....works like a charm.

Thanx again,
jd
 
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