Harmon Kardon HD-970 problem

pkonstantinidis · 3rd July 2009, 10:47 AM

Hi,
I have had a Harman Kardon HD970 for more than 4 years now. I purchased it brand new and was quite happy with it.
Lately, the HD970 cannot play the majority of CDs that I put inside. It gives me an error "No Disc" (or something like that). It can read only 1 out of 5 CDs. That was never the problem before.
Has this problem ever appeared to other people before? Is it worth trying to fix it or should I dump the CD player? (It's not usable as it is right now).
Any suggestions for a replacement unit? How about the HD990? Or the Cambridge Azurro 640?

PM650 · 4th July 2009, 03:53 AM

Tried cleaning the lense with a q-tip & alcohol?

pkonstantinidis · 4th July 2009, 07:03 AM

Yes, I did clean the lens, but no joy!

Any other possibilities?

zaolo · 8th March 2010, 12:41 PM

Quote:

Originally Posted by pkonstantinidis

Any other possibilities?

... on my HD-970 (second version)
for the same problem i have substituted the laser pickup
that is a sanyo SF-HD65 and then work well.
(for the first version of HD-970 the transport is different and is the DSL-710A)
You can find this part on ebay for less than 10 euros.
Note that before install you need to remove soldered iron from new pick up
(for protection purpose).

niewiem · 14th June 2010, 04:17 PM

Quote:

Originally Posted by zaolo

... on my HD-970 (second version)
for the same problem i have substituted the laser pickup
that is a sanyo SF-HD65 and then work well.
(for the first version of HD-970 the transport is different and is the DSL-710A)
You can find this part on ebay for less than 10 euros.
Note that before install you need to remove soldered iron from new pick up
(for protection purpose).

You should remove soldering iron AFTER installing 24 pin cable. Another thing: most of SF-HD65 on the market isn't sanyo just some poor quality china producs which don't do better job reading poor CDs than oryginal old sanyo laser.

ignaz · 7th August 2011, 10:40 AM

Hello, I´ve got the sameproblem with my HD 970 and i just substituted the laser unit. The only effect was that the cd spins a 15 seconds longer till the NO DISK message occours. Has anyone of you service data for the cd-unit circuit so i can find the exact error??
Thanks, Ignaz

SoNic_real_one · 07:24 PM

Did you remove the protective solder blob from laser after installing? Like the small red circled one in the attached pic (not the connector).

ignaz · 8th August 2011, 07:15 AM

Hi SoNic,
thanks for the tip but I did it just after i connected the flat cable. I guess it´s for ESD protection, right? I thought perhaps the original unit from sanyo may work better ?? Or could it be that a firmware update would fix the problem (but why when it worked before with the same firmware 4.0) ??? Ignaz

SoNic_real_one · 8th August 2011, 10:32 PM

If another laser unit will fail to work ( they are preatty cheap, I have bought a few from eBay), then maybe something else is wrong. Usually, at that point it would require some kind of scope to find out what's wrong.

ignaz · 8th September 2011, 05:50 PM

... another laserunit of higher quality made it. Now it works well. QUALITY MATTERS !!.
Can I achive any imrovements grading up the firmware of the player?? (The actual version written on a small sticker on the flash is 4.0).
Thanks so far. IGNAZ

3rd July 2009, 10:47 AM	#1
pkonstantinidis diyAudio Member Join Date: May 2009	Harmon Kardon HD-970 problem Hi, I have had a Harman Kardon HD970 for more than 4 years now. I purchased it brand new and was quite happy with it. Lately, the HD970 cannot play the majority of CDs that I put inside. It gives me an error "No Disc" (or something like that). It can read only 1 out of 5 CDs. That was never the problem before. Has this problem ever appeared to other people before? Is it worth trying to fix it or should I dump the CD player? (It's not usable as it is right now). Any suggestions for a replacement unit? How about the HD990? Or the Cambridge Azurro 640?

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4th July 2009, 03:53 AM	#2
PM650 diyAudio Member Join Date: Jul 2005 Location: Tennessee	Tried cleaning the lense with a q-tip & alcohol?

4th July 2009, 07:03 AM	#3
pkonstantinidis diyAudio Member Join Date: May 2009	Yes, I did clean the lens, but no joy! Any other possibilities?

7th August 2011, 10:40 AM	#6
ignaz diyAudio Member Join Date: Aug 2011	Hello, I´ve got the sameproblem with my HD 970 and i just substituted the laser unit. The only effect was that the cd spins a 15 seconds longer till the NO DISK message occours. Has anyone of you service data for the cd-unit circuit so i can find the exact error?? Thanks, Ignaz

8th August 2011, 07:15 AM	#8
ignaz diyAudio Member Join Date: Aug 2011	Hi SoNic, thanks for the tip but I did it just after i connected the flat cable. I guess it´s for ESD protection, right? I thought perhaps the original unit from sanyo may work better ?? Or could it be that a firmware update would fix the problem (but why when it worked before with the same firmware 4.0) ??? Ignaz

8th August 2011, 10:32 PM	#9
SoNic_real_one diyAudio Member Join Date: Jan 2008 Location: Virginia	If another laser unit will fail to work ( they are preatty cheap, I have bought a few from eBay), then maybe something else is wrong. Usually, at that point it would require some kind of scope to find out what's wrong.

8th September 2011, 05:50 PM	#10
ignaz diyAudio Member Join Date: Aug 2011	... another laserunit of higher quality made it. Now it works well. QUALITY MATTERS !!. Can I achive any imrovements grading up the firmware of the player?? (The actual version written on a small sticker on the flash is 4.0). Thanks so far. IGNAZ

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