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Old 17th June 2013, 02:02 PM   #2851
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Join Date: Jan 2012
Location: Leersum
Default PlayStation skips

I bought a playstation did the minimum of mods to create a fine cd player. It plays wonderful until we reach track 5/6 and further it starts skipping like mad.
First I thought it a....

Copy problem
Dirt
Heat

But the powersupply is outside the grey box
The problem stay with commercial discs
And even when I use brand new and clean discs

Could this stil be calibration issue because it plays good until midway?

When I fixed this problem I will try the rest of the mods.
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Old 17th June 2013, 02:23 PM   #2852
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Where I should put the volume potentiometr ?

Regards
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Old 17th June 2013, 04:31 PM   #2853
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Did you adjust bias/gain?
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Old 17th June 2013, 05:50 PM   #2854
ceteras is offline ceteras  Romania
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Quote:
Originally Posted by Xerxes75 View Post
... It plays wonderful until we reach track 5/6 and further it starts skipping like mad.
I've had several different PSone units, some had this same issue.
My solution was to replace the laser unit.
Perhaps bias/gain adjustment would help.
I believe it's more likely this to be a mecanical problem with the unit. I did one bias adjustment for one of these but it didn't 100% solve it.
I just used the best laser unit I had. (one from a newer Psone, adapted).
I don't trust ordering a new one from ebay right now.
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Old 17th June 2013, 05:52 PM   #2855
ceteras is offline ceteras  Romania
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Quote:
Originally Posted by gavron04 View Post
Where I should put the volume potentiometr ?

Regards
You shouldn't need a volume potentiometer for this.
You should have one on your power amplifier.
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Old 18th June 2013, 01:32 PM   #2856
Nanook is offline Nanook  Canada
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Default playback issues...

Is it a SCHP100X model?

Quote:
Originally Posted by Xerxes75 View Post
I bought a playstation did the minimum of mods to create a fine cd player. It plays wonderful until we reach track 5/6 and further it starts skipping like mad.
First I thought it a....

Copy problem
Dirt
Heat

But the powersupply is outside the grey box
The problem stay with commercial discs
And even when I use brand new and clean discs

Could this stil be calibration issue because it plays good until midway?

When I fixed this problem I will try the rest of the mods.
I think the first question should be whether or not you have cleaned the lens? Then follow ceteras' advice:

Quote:
Originally Posted by ceteras View Post
I've had several different PSone units, some had this same issue. My solution was to replace the laser unit. Perhaps bias/gain adjustment would help. I believe it's more likely this to be a mecanical problem with the unit. I did one bias adjustment for one of these but it didn't 100% solve it. I just used the best laser unit I had. (one from a newer Psone, adapted). I don't trust ordering a new one from ebay right now.
Is it a SCHP-100X model? There are alignment issues that should be considered as well. I have over 10 SCHP-1001 players and have tested them all. To me the most likely culprit, after ensuring that the laser lens is clean is one of laser alignment, although I have never had issue with it. If once aligned, and the problem persists, then a new (or used) laser may be required.

Even the most basic mods can result in a very good player. If you are not comfortable doing the mods you can cheat a little and just use the AV output (using the AV to RCA cable as supplied by Sony)

Just in comparison, I have an old (but still good sounding Pioneer "Elite" PD54 cd player. The SCHP1001 with only the first cap removal mod is at least on par with it. I know of some who have compared a PS1 to a Wadia player and preferred the SCHP100X to it.

Xerxes:once you get a working SCHP-100X take your time. The results are worth it.
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stew -"A sane man in an insane world appears insane."
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Old 19th June 2013, 06:11 PM   #2857
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My reaction is a bit late.... but i will look into your suggestions

the lens is cleaned and it is the right model but again i will take my time....
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Old 20th June 2013, 12:48 AM   #2858
Asioc is offline Asioc  Portugal
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Quote:
Originally Posted by Pg2005 View Post
The resistor is only to filter low frequences. You donīt need a resistor if you want to listen what is on your CD.
Quote:
Originally Posted by Pg2005 View Post
Hello, I am not Manfred, but he is a good friend of mine. We discussed the resistor a couple of days ago, that's why I knew what happened to you.
You said you have got a Tube Amp, so Mick's solution is perfekt for tubed amp's. Some tube amp's doesen't like to much incoming power.

Hi all,

I'm about to make the Mick's "Modification of the audio output stage" on my PS1, I already have the Wima 3,3uF 50v capacitors, but I have a few doubts:

My amp is a Primaluna Prologue 2 (tube amp) with an input impedance of 65kOhm!

. Do I realy need to use the ground resistors? If yes, are the 22k (1%) ok to the 65kOhm impedance?

. What power rating shall I use for the resistor?

Thanks,
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Old 21st June 2013, 04:15 PM   #2859
dnic77 is offline dnic77  United Kingdom
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hi all, iv done the mods on the output like mick suggested, but when plug it into the gainclone i get terrible distortion. it worked fine before the mods. when i plug it into the av amp it sounds really good. the pot in the gainclone is a 50k. can anyone help please.
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Old 22nd June 2013, 12:53 PM   #2860
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Quote:
Originally Posted by dnic77 View Post
hi all, iv done the mods on the output like mick suggested, but when plug it into the gainclone i get terrible distortion. it worked fine before the mods. when i plug it into the av amp it sounds really good. the pot in the gainclone is a 50k. can anyone help please.
2 pages back same problem!

Chuck the resistor away!

No need for the resistor
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