Anyone know the Krell KPS20i ?

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RobertS61

RobertS61

Member
Joined 2007
What it actually does:
When I put the power on without a disk then lens moves one time up flashes red and the motor makes a one tenth turn max then it stops.
When I put a disc in and press play I hear some mechanical noise the disc turns the same amount and then nothing happens.
I have a servicemanual from the Philips CDM-9 Mod 4 but there's no flowchart just schematics and partnumbers and some graphs and voltagelevels.
This is the board underneath the CDM PRO9.
 

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tiefbassuebertr

tiefbassuebertr

Member
Joined 2005
tiefbassuebertragung.de
BrianEno said:
What it actually does:
When I put the power on without a disk then lens moves one time up flashes red and the motor makes a one tenth turn max then it stops.
When I put a disc in and press play I hear some mechanical noise the disc turns the same amount and then nothing happens.
I have a servicemanual from the Philips CDM-9 Mod 4 but there's no flowchart just schematics and partnumbers and some graphs and voltagelevels.
This is the board underneath the CDM PRO9.
Click to expand...

This PCB is a version also used in jukebox devices and broadcast devices (industrial version).
about the term ' Philips "CD Engine II" '
I get this URLs:
±öÊ¿¼¶µÄÒôÏì ÆÀLinear Acoustic LACD-1 CD³ªÅÌ ÀµÓ¢ÖÇ - ÄÔÂð·ÈµÄÈÕÖ¾ - ÍøÒײ©¿Í
linear acoustic - Eine Reise in die deutsche High-End-Vergangenheit... - CD-Player
®öº©¤£»Ý°ª»ùMicromega T¨t¦C¼Æ¦ì¨t²Î

But the service Manual of this model might be help:
http://lampizator.eu/LAMPIZATOR/TRANSPORT/FIKUS/Fikustransport.html
http://www.diyaudio.com/forums/digital-source/32827-philips-cd930-cd931-cd940-service-manual.html
and also the SM of this model:
http://www.studerundrevox.de/images/stories/emt/EMT-982-Prospekt-01-k.jpg
http://www.hifitime.com/audio/20100814/72024.html (inside view)
http://img03.taobaocdn.com/imgextra/i3/55799068/T2tXXqXjBXXXXXXXXX_!!55799068.jpg
 
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RobertS61

RobertS61

Member
Joined 2007
Just finished with swapping in the third laser and thought Bingo, it works.
Till the 5th track started and scratching noises appeared over the loudspeakers that intensified when consecutive tracks were played.
When I put in a CD with few tracks and runningtime like Diamond Life from Sade there's no problem, when I put in a CD with 20 tracks the music is unlisteble from track 4 or 5.
I'm really out of options now because there's no trimmer on the servoboard.

I bought a complete CD player with a advertized CDM9/60 (the Pro version) inside but when I took of the hood I immediately saw it was the CDM9/44 standard version. When I complained he basically said that he did not know it and I could drop dead.
Very nice indeed :mad:

I paid him 250 Euro's and another guy who sold them in Krell sparepart boxes 180 Euro's. Both laserunits were no good at all.
So in USD I'm 600.- lighter and still have no playing Krell KPS20i...

Happy Holidays nevertheless.
 
tiefbassuebertr

tiefbassuebertr

Member
Joined 2005
tiefbassuebertragung.de
BrianEno said:
Just finished with swapping in the third laser and thought Bingo, it works.
Till the 5th track started and scratching noises appeared over the loudspeakers that intensified tracks were played.
When I put in a CD with few tracks and runningtime like Diamond Life from Sade there's no problem, when I put in a CD with 20 tracks the music is unlisteble from track 4 or 5.
I'm really out of options now because there's no trimmer on the servoboard.

I bought a complete CD player with a advertized CDM9/60 (the Pro version) inside but when I took of the hood I immediately saw it was the CDM9/44 standard version. When I complained he basically said that he did not know it and I could drop dead.
Very nice indeed :mad:

I paid him 250 Euro's and another guy who sold them in Krell sparepart boxes 180 Euro's. Both laserunits were no good at all.
So in USD I'm 600.- lighter and still have no playing Krell KPS20i...

Happy Holidays nevertheless.
Click to expand...

Similar behaviour I observe in the moment by an older Philips CD player CD824 (roughly equivalent to the Marantz CD-42), that is for service by me (with CDM4 mech. so as TDA8808T/TDA8809T in the RF/Servo section).
The RF signal is correct from the Vss value (that means, laser diode isn't muddy), but incorrect in order to the wave form. Noise and RF interference are superimposed. I will investigate the APC circuit so as the DC voltage line for the RF preamp section in the next time.
Unfortunately this model isn't a service-friendly model, so that I must create several test points for checking voltages and wave forms while the operating mode.

BTW - the CDM9 laser head was equipped with the first me known hologram laser diode like this:
http://www.google.com.tw/patents?id=fvQIAAAAEBAJ&printsec=abstract&zoom=4#v=onepage&q&f=false
http://www.datasheetcatalog.org/datasheet/Sharp/mXqxuqy.pdf


check out also this threads:
http://www.diyaudio.com/forums/digi...m12pro-cdm-12-cdpro-cdm12-6-any-vam-vaus.html
http://blog.sina.com.cn/s/blog_4a65750301008bfe.html
http://www.diyaudio.com/forums/digital-source/144512-cdm9-65-motor.html#post2320510
http://www.diyaudio.com/forums/digi...ble-advices-replace-motor-service-wanted.html
 
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RobertS61

RobertS61

Member
Joined 2007
Yeah it's really annoying.

I'm getting really confused about the differences between the:
Philips CDM9/44 & Philips CDM9/65

I know that the Philips CDM9/60 is the Pro version and the Philips CDM9/44 is the standard version with Mabuchi's RF-300C-11400 motor but what's the Philips CDM9/65?

I just bought two CDM9/44 units because I want to have the Krell running again as the Duson CD-100.
Are there any highend nineties players that have laserunits that are still fabricated or abudantly stashed.
Sony's KSS-151A is another "successtory" widely adopted in expensive Denon's, Wadia's and Spectrals.
They want us all to get streaming and throw away the archaic sources...:smash:
 
tiefbassuebertr

tiefbassuebertr

Member
Joined 2005
tiefbassuebertragung.de
as I know, CDM9 exists with two motor versions: one with brushed Mabuchi spindle motor and one with brushless motor version. Maybe there was additional various versions in the turntable (motorpulley), but this I don't know exactly. At least by the CDM12.1/VAM1202 (same basic outline of motor pulley resp. spindle turntable) there was two different magnet forces inside, and thus two different associated clamper units in those loader devices.
Here some lists, that I have created in the last years - perhaps of interest:

CDM-9 order codes
cdm9 pro 4822 691 30365
cdm9/42 4822 691 30241
cdm9/44 4822 691 30275
CDM9/44 4822 691 30277 CDM9STANDARD
cdm9/44 +spec.parts 4822 691 10403 CDM9/MOD.4
cdm9/63 4822 691 20748 CDM9DC63
cdm9/65 4822 691 30288 CDM9-NEXTEL PHI (Motorpulley for Toploader with heavy weight)

Models with CDM-9/65
Meracus IMAGO SAA7310GP CDM-9/65
PHILIPS CD931SAA7350CDM-9/65
PHILIPS CD951TDA1547 ?span lang=EN-US> SAA7350 ?SAA7310CDM-9/65
PHILIPS SCM965 691 .30288 (cdm9/65 = CDM9-NEXTEL PHI)

Models with CDM9/63
PHILIPS CD690 CDM9/63
PHILIPS CD692 CDM9/63
PHILIPS 70CD690 691 20748 (cdm9/63 CDM9DC63)
PHILIPS CD692 CDM9/44 (??? CDM9/63)
PHILIPS CD692 CDM9/44 (??? CDM9/63)

Models with CDM9/35
CDi 180: CDM9/35

Models with CDM9/42
PHILIPS CDI6O1 691 .30241 = cdm9/42 (Interaktiver CD-Player)

Models with CDM9/44
PHILIPS CD930 CDM9/44 TDA1547 SAA7310GP (Stereoplay 9/92 450 DM)
PHILIPS CD931 CDM9/44 TDA1547 (Stereoplay 6/94 500 DM)
PHILIPS CD940 CDM9/44 (Stereoplay 4/93 600 DM)
PHILIPS CD950 CDM9/44 TDA1547 (Stereoplay 6/92 1.000 DM)
PHILIPS CD951 CDM9/44 TDA1547
PHILIPS CDF190 CDM9/44 (Foto CD-Player, Stereoplay 6/93 850 DM)
PHILIPS DFS951 CDM9/44
PHILIPS FS911 CDM9/44 (Komplettanlage)
PHILIPS FS911DCC CDM9/44
PHILIPS FS931 CDM9/44
PHILIPS FS931 DCC CDM9/44
PHILIPS FS933 CDM9/44
QUAD 67 CS4328KP – SAA7310GP CDM-9/44
THETA DATA BASIC CDM-9/44 It's a Transport
T+A CD1200R SAA7310GP CDM-9/44 MC68HC705C9ACP (= ZC400012P) (Stereoplay 7/94 2.500 DM)

Models with CDM-9 Pro
AUDIOLAB 8000 CDM Transport
BURMEISTER 979 Transport CDM-9 Pro
EMT 982 PROFESSIONAL TDA1547 (DAC7) CDM-9 Pro
Forsell Air Reference Air Bearing Transport CDM-9 Pro
JADIS JD-1 Transport CDM-9 Pro
KRELL KPS 20i 4 x PCM63P-K – Motorola XC56002F CDM-9 Pro ( CDM-9/60 )
MARANTZ CD-23 2 x TDA1547 (DAC7) CDM-9 Pro
PHILIPS LHH-100 CDM9 pro TDA1547
ROTEL DCM-9PRO CDM 9 pro PCM63
ROTEL RCD-990 CDM-9 Pro 2 x PCM63P ? PMD100
T+A CD1400AC SM5864 CDM-9 Pro
THETA DATA BASIC CDM-9 Pro It's a Transport
T+A CD1400AC CDM-9 Pro SM5864

Models with CDM9 without mentioned suffix
Philips CR-206 CD-ROM PC CDM9
Meccanica CD CDM-9
ARCAM ALPHA 5 CDM-9
ARCAM ALPHA 5 PLUS CDM-9
ARCAM ALPHA 6 SM5864 – SM5840 CDM-9
ARCAM DELTA 270 PCM69AP-J CDM-9
AURA CD-50 SAA7321 CDM-9
GRUNDIG Autoradio SCD1910RDS 72008-658 (CDM-9)
MARANTZ 74CD23 CDM9
T+A CD1500R SM5864AP + PCM1702-K CDM-9
T+A CD3000R SM5864AP + PCM1702-K CDM-9
METAXAS MAS PHOS Transport CDM-9
MISSION-Cyrus DAD7 AD1861 CDM-9
NAIM AUDIO CD2 TDA1541A CDM-9
NAIM AUDIO CD3 TDA1541A-S1 (Single Crown) CDM-9 (Stereoplay 7/94 2.800 DM)
QUAD 66 TDA1541A CDM-9
ROTEL RCD-970BX 1 x TDA1305T CDM-9
ROTEL RCD-975 2 x TDA1305T CDM-9 (Stereoplay 3/97 1.200 DM)
T+A CD1500R CDM-9 SM5864AP + PCM1702-K
T+A CD3000R CDM-9 SM5864AP + PCM1702-K

CDi-models:
Philips CDI 205/00 - cdm9
Philips CDI 210/00 - cdm9
Philips CDI 210/20 - cdm9
Philips CDI 220/00 - cdm9
Philips CDI 220/20 - cdm9
Philips CDI 220/40 - cdm9

more about CDM9:
http://www.diyaudio.com/forums/digital-source/29889-what-dacs-mechanics.html

more pics:
Çë½Ì´ó¼Ò£¬ÈçºÎ¸ü»»CDM9¹âÍ· - ÒôÏìDIYÂÛ̳ - ÖйúÒôÏìDIY
³¹µ×Ñо¿ PHILIPS CDM9 ¹âÍ·
DIYPlus • ???? - CDM9?CDM12?????
*µ¼Ö¤jÆU :: View topic - §ÚªºCDM4Âà½L
ÇóÖú cdm9¹âÍ·»»ÎÞË¢µç»úºó×°»ØµúÍжÁ²»Á˵ú - ÒôÏìDIYÂÛ̳ - ÖйúÒôÏìDIY

the developer/designer of CDM9 is Mr. Rene Boonen, e-mail = rene.boonen@mech.kuleuven.ac.be and Paul Sas, URL:
ASA/EAA/DAGA '99 - Electronic Controlled Exhaust System For Car and Truck Engines
This I have read in the test report of Audiomeca's Mephisto in German's magazine Image HiFi, April 2000.
 

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S

SpiderMan1

Member
Joined 2012
Hi, i have krell kps20i and my magnet-star got damaged :(

Anyone know where i can buy kps20i quenched star magnet clamps ?

Please help me, my email is: :cop: email address removed. Please PM :cop:

An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.
 
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S

stephensank

Member
Joined 2006
stephensank.com
BrianEno said:
Just finished with swapping in the third laser and thought Bingo, it works.
Till the 5th track started and scratching noises appeared over the loudspeakers that intensified when consecutive tracks were played.
When I put in a CD with few tracks and runningtime like Diamond Life from Sade there's no problem, when I put in a CD with 20 tracks the music is unlisteble from track 4 or 5.
I'm really out of options now because there's no trimmer on the servoboard.
.
Click to expand...

This may not be directly helpful, but may give some clue, but this is exactly the sort of behaviour you get from the older CDM-4/etc. if the laser current is not adjusted quite in range. While this cdm obviously is meant to be fully auto-calibrating, it would seem to me that something is disturbing the auto-laser-current control. Sure would explain why one replacement laser worked much better than another. Without having a schematic of the cdm's servo board handy, the first two things I would do is check every resistor on that board & replace any that are at all out of spec, and then replace all of the lytic caps on the pcb, which aren't many.
 
huggygood

huggygood

Member
Joined 2011
tiefbassuebertr said:
This PCB is a version also used in jukebox devices and broadcast devices (industrial version).
about the term ' Philips "CD Engine II" '
I get this URLs:
±öÊ¿¼¶µÄÒôÏì ÆÀLinear Acoustic LACD-1 CD³ªÅÌ ÀµÓ¢ÖÇ - ÄÔÂð·ÈµÄÈÕÖ¾ - ÍøÒײ©¿Í
linear acoustic - Eine Reise in die deutsche High-End-Vergangenheit... - CD-Player
®öº©¤£»Ý°ª»ùMicromega T¨t¦C¼Æ¦ì¨t²Î

But the service Manual of this model might be help:
http://lampizator.eu/LAMPIZATOR/TRANSPORT/FIKUS/Fikustransport.html
http://www.diyaudio.com/forums/digital-source/32827-philips-cd930-cd931-cd940-service-manual.html
and also the SM of this model:
http://www.studerundrevox.de/images/stories/emt/EMT-982-Prospekt-01-k.jpg
http://www.hifitime.com/audio/20100814/72024.html (inside view)
http://img03.taobaocdn.com/imgextra/i3/55799068/T2tXXqXjBXXXXXXXXX_!!55799068.jpg
Click to expand...
Hi tiefbassebertr.
Do you still have access to the document concerning the CD ENGINE II industrial pcb?
The pcb of the CDM9, not that of the decoder
I am annoyed with a micromega drive(CDM9/65) which is equipped with it
 
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huggygood

huggygood

Member
Joined 2011
ditto but does not bring anything at the schematic level but there are all the functions of each conductor on the connectors, suddenly it is much easier to find the problem without having to make a test bench with the pcb next to the mechanics
 

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F3rrograph

F3rrograph

Member
Joined 2009
Anyone done any work on this "CD Engine II" set? I have a Sugden SDT-1 with this board set and CDM9/44 laser. The power supply had some issues and has been repaired. I also changed some caps on the two boards, and the two transistors that drive the table motor. I swapped laser out with know good unit but the problem remains.

Most times the disc will spin up and you hear the usual read noises but this continues and the display just shows "Err". Sometimes it will read the TOC very quickly and play perfect without a glitch. Ive not been able to discern any pattern.

Boards a have been checked for dry joints and interconnections cleaned.

It seems to be on first read like it cant lock-on. Some observation - at first start sometimes the disc spins back briefly. If I invert the mech it reads every time (gravity affecting focus offset?)

Very difficult to work on in this unit since the power & micro board sits on top of the "Engine" board and servo is mounted under the mech.

Any help gratefully received.

Pictures here: https://photos.app.goo.gl/znzuKngDmXqFwePGA
 
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huggygood

huggygood

Member
Joined 2011
F3rrograph said:
Anyone done any work on this "CD Engine II" set? I have a Sugden SDT-1 with this board set and CDM9/44 laser. The power supply had some issues and has been repaired. I also changed some caps on the two boards, and the two transistors that drive the table motor. I swapped laser out with know good unit but the problem remains.

Most times the disc will spin up and you hear the usual read noises but this continues and the display just shows "Err". Sometimes it will read the TOC very quickly and play perfect without a glitch. Ive not been able to discern any pattern.

Boards a have been checked for dry joints and interconnections cleaned.

It seems to be on first read like it cant lock-on. Some observation - at first start sometimes the disc spins back briefly. If I invert the mech it reads every time (gravity affecting focus offset?)

Very difficult to work on in this unit since the power & micro board sits on top of the "Engine" board and servo is mounted under the mech.

Any help gratefully received.

Pictures here: https://photos.app.goo.gl/znzuKngDmXqFwePGA
Click to expand...
I no longer remember which CI I changed on my card, I can tell you this evening, but it has been working perfectly since.
 
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