[TechAssist] Re: Sony Laser Kss-140A Adjustment
- From: Gary McCartney <gary@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 26 Jan 2005 10:41:59 -0500
Here is some info that will hopefully help. It is for KSS240A rather
than 140A though.
included is a link to a photo of the KSS240A.
http://www.number63.ca/KSS240A.jpg
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Hi Gary.
Try this :
-scope the RF wave form at pin 40 of Servo IC 101 CXA1372 ,usually it's
about 1 vpp to 1.2 vpp (good condition) .If it's under 1 Vpp ,the best way
is replace the pickup KSS 240A.
-you can make the pickup 's life last longer (several months) by increasing
the laser current .
-There are 3 trim pots on the KSS240A .The righthand is the laser curent
adjust,the middle is focus bias adj,and the lefthand is tracking offset adj.
-If the music still skipping ,you should increase the tracking gain trim pot
RV101 (on the BD board) a little (clockwise).
Hope this helps
Vo Hung
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One way you could maybe Tell is place your DMM or Scope on each Pot by
tacking a short buss wire on it , then as you insert a CD , observe if the
DMM responds the same time with a reading as when the Red Laser turns on
and
is seen reflecting on the CD from a side view.
I think there are (2) Pots for the Coils that raise / lower the Lense which
set focus limits, then one other will be the laser Power level. I would not
know 100% weather that is indeed so, but if the voltages on those 2 Pots
coincide when the Laser is focusing, I would say my guess was good.
Steve Hearns
Technotronic Dimensions, NY [USA]
WWW.TECHNOTRONIC-DIMENSIONS.COM
1-877-817-9885 (Voice / Fax Toll Free - US Only)
E-Mail: Steve@xxxxxxxxxxxxxxxxxxxxxxxxxxx
----- Original Message -----
From: "Gary McCartney" <gary@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, September 24, 2004 5:52 PM
Subject: [TechAssist] Sony CD laser assy KSS-240A, how to adjust gain?
I have a Sony CD player which plays most discs fine but a few sputter
before locking in and I'm thinking maybe just tweaking the gain on the
laser assembly would help. This one has 3 trim pots. Which ones do I
need to adjust, or is it a case where all 3 must be aligned and I
shouldn't attempt it? This part is $60.00 CDN at my supplier so I doubt
the customer would go for it. Probably cheaper at US sources but
exchange, brokerage fee, etc. might not be worth it?
----------------------------------------------------------------------
Gary McCartney
McCartney Electronics
Guelph Ontario Canada
Est. 1984
email: gary (at) number63.ca
Phil Bader wrote:
> Roger, I've searched /everywhere/. I can't find a manual, training
> manual,etc. No references to aligning it. No tips. Zippo.
> I guess try tritronics and do a search for the manual. I don't see any
> free sources out there.Sorry.
> Phil Bader
>
> Roger G wrote:
>
>
>>The model is STR-D159 (with the tape/cd part HST-d159).
>>Not sure they would give info on the laser pots but would be nice
>>thanx
>>Roger G.
>>
>>Mr. Fix-It
>>Harrisburg, PA 17110 WebSite- http://mrfixit.netfirms.com
>>rogerfixit@xxxxxxxx
>>FAX 510-740-3641; Tel: 717-763-7098 (shop) 717-652-1703(home)
>>
>>At 04:03 PM 1/24/2005, you wrote:
>>
>>
>>
>>>You gave the laser assy number, but if you can give me the model number
>>>I maybe can shoot you a manual if i locate one in PDF, or at least cut
>>>and paste the section you need.
>>>Phil Bader
>>>
>>>Roger G wrote:
>>>
>>>
>>>
>>>
>>>>Sony CD laser KSS-140A
>>>>This unit has 3 adjusting pots - most have only one.
>>>>Which one adjusts the laser output ?
>>>>(What do the other 2 do??)
>>>>Tried searching archives since I thought I read this but could not find
>>>>TIA
>>>>
>>>>Roger G.
>>>>
>>>>Mr. Fix-It
>>>>Harrisburg, PA 17110 WebSite- http://mrfixit.netfirms.com
>>>>rogerfixit@xxxxxxxx
>>>>FAX 510-740-3641; Tel: 717-763-7098 (shop) 717-652-1703(home)
>>>>
>>>>
>>>>-------------------------------------------------------------------------
>>>>
>>>>
>>>
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>>>
>>>--
>>>
>>>Philip Bader
>>>Jan Phyl TV Inc. (estab. 1976)
>>>3420 Recker Hwy. Winter Haven, Fl. 33880
>>>Fax (863) 299-8821
>>>email: tjanphyl@xxxxxxxxxxxxxxx
>>>
>>>
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