Sony Ps-x75 Important notice re Main MicroProcessor MB8841-2

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mkoerner
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Re: Sony Ps-x75 Important notice re Main MicroProcessor MB88

Post by mkoerner » 09 Apr 2018 10:03

Hi,

Can you weight the SH-165 the same way? According to some Sources it should be slightly heavier. This would be the final prove that they are different and how to differentiate them (by weight).

Also the SH-165 is carbon-Fibre reinforced according to some sources, which the SH-155 should not be.

Would you please be so kind and upload a Scan of the Manual comming with the SH-155 so that it can be put to the Vinylengine Library? That would be a great help.

Kind regards

Mike

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Re: Sony Ps-x75 Important notice re Main MicroProcessor MB88

Post by brinsmeads » 10 Apr 2018 01:51

Hi Mike,

I thought I was the only person interested in this, Mike

The difference between these two has had me interested for 38 years since I purchased the XL45A Combo, with the SH155.

That was soon after I purchased the PS-x75.

After using these two on the PS-x75 ( wth XL25A) without any balance adjustment to either , and at the time I just assumed they were the same only a difference in colour.

I have now set up again the two with the XL25A cartridges again with longer screws to accomodate the plastic washers.

I'll post some pics when I can but they will be a complete cartridge headshell assembly.

regards Rob

ps... the only Carbon fibre Headshell I know of that Sony marketed was the SH160

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Re: Sony Ps-x75 Important notice re Main MicroProcessor MB88

Post by brinsmeads » 10 Apr 2018 02:01

SH160 Headshell
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SH160 Sony Headshell.jpeg
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Re: Sony Ps-x75 Important notice re Main MicroProcessor MB88

Post by brinsmeads » 10 Apr 2018 12:46

XL45S notes
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Re: Sony Ps-x75 Important notice re Main MicroProcessor MB88

Post by brinsmeads » 11 Apr 2018 06:39

The original SH165 (X-4858-414-0) comes in at 17.17 grams
included in this weight is the XL25A cartridge…. with an advertised weight @ 5.2grams approx. (may not include stylus guard on the XL25A) but includes wiring.

2 x headshell mounting screws, nuts and washers @ 0.95 grams.

No Sony headshell Spacer (2-227.3134.00) fitted in the SH165.

With the subtraction of 0.95g and 5.2g from 17.17g off the original SH165 leaves us at 11.02 grams

Allowing for minor discrepancies it leaves it so close to call from the SH155. Bare shell (11.50grams)

The Sony PS-x75 Service manual reports the supplied shell weight as 11 grams

Individual results may vary slightly
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2 x cartridge mounting screws and nuts = 0.95g.jpg
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Sony SH165 (Goldy Hue) as supplied with PS-x75 = 17.17g.jpg
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Re: Sony Ps-x75 Important notice re Main MicroProcessor MB88

Post by mkoerner » 11 Apr 2018 12:32

Many many thanks for your efforts. Thats some Information I have been looking for for years. So there is no chance to differentiate the two HS-Types via it's weight.

May I ask why you know, that the second Headshell indeed is a SH-165 and not a SH-155?

According to my understanding the SH-165 has its Aluminiumbody integrally strengthened with Carbon fibres. However I still have to find a written proof by Sony somewhere. But otherwise however I could see no use in distinguishing the two types: there must be a difference ?!

I am however pretty sure that most SH-165 now sold are in reality SH-155 as this is what Sony delivered with their PS-X70/60/50 Line and with their XL-35S and XL-45S.

On a sidenote: you showed the SH-160. This Headshell is older and meant to be used with older Tonearms using a different geometrie. Afaik the Screw-slots are further away from the SME-Mount than in the SH-155. In older Arms Sony uses distances in the range of 51.5mm to 52.5mm tip-to-mount distance. In the newer Arms they reduced it to 49mm. Therefore not all Cartriges can be mount properly in the SH-160(ie close enough to the rear) for the newer Arms and Tables using the 49mm distance.

Mike

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Re: Sony Ps-x75 Important notice re Main MicroProcessor MB88

Post by brinsmeads » 12 Apr 2018 10:19

Mike,

regarding the overhang adjustment it comes in at 49mm with the SH160 (Carbon Fibre Headshell) and the XL45A MM Cartridge, so I assume, it would suit most Sony Cartridges.

This may not be the case with other manufacturers.

The overhang adjustment is in the manual, and by turning the mat over correct adjustment can be achieved.

Data on the XL25A is scarce, but its specs are very similar to the XL15 except for the elliptical stylus on the XL25A.
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Sony XL25A Cartridge data.jpg
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PS-x75 ...49mm overhang adjustment. from manual.jpg
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SH160 Headshell with XL45A MM Cartridge. 49mm from stylus tip to outside of collar.jpg
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Re: Sony Ps-x75 Important notice re Main MicroProcessor MB88

Post by brinsmeads » 12 Apr 2018 11:05

I'm still looking for factual paper work........on the SH165...

I've always known it as (SH165) thats for nearly 40 years.

I did have a Sony Headshell sales brochure in the beginning .....and also I'm not sure as to whether there was an Headshell identifier number with the PS-x75 when new from box.........

I could always identify a SH165 shell because of its Gold hue

In a way the SH155 shell suits the PS-x75 (arm tube) because the silver both match

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Re: Sony Ps-x75 Important notice re Main MicroProcessor MB88

Post by mkoerner » 12 Apr 2018 12:39

Hi,

Yes Sony Carts do work in the SH-160, but I had twice tried to mount non Sony Carts and had a problem getting far enough back (bad luck :-) ).

The XL-25 and XL-15 share the same generator, but the XL-25 ist the "selected" version oft the generator (I.e. closer channel matches). The XL-25 is already a pretty good Cart. An XL-15 with a Jico ND-25E will imho beat an 2M Blue in Terms of sonics (although the 2M Blue will last longer) and is much cheaper to get. And with the original ND25E still sowing up occasionally even the logetivity issue would be solved an most likely its still a cheaper solution.


Again, many thanks for your efforts, you have given me some additional Insight into an issue I'm riddling with since years...

Mike

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Re: Sony Ps-x75 Important notice re Main MicroProcessor MB88

Post by brinsmeads » 12 Apr 2018 21:01

Mike,

thats very interesting info on the XL15/XL25 and I'll have to make sure I don't get to far off track with cartridges on the SH160 following your experiences ......and yes just recently I bought a few spare original Sony OEM ND25E Stylus (39AUD ea) from a seller here in Australia, who had quite a few in stock.

I'm not to sure how I'd approach a stylus replacement issue on the XL45A, in relation to cost, I'd probably fit it with ND25E seeing I've now got a few of these.

Thankyou, kind regards Rob

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Re: Sony Ps-x75 Important notice re Main MicroProcessor MB88

Post by mkoerner » 13 Apr 2018 15:30

Well that's mechanically possible but you would loose a bit on Soundquality. Imho the Body deserves better matching Styli.

Occasionally one can still find original, sealed Systems for quite a (imho) fair price. A XL-45 with original needle is soundwise very close to the 2M Black. Slightly less neutral, slightly faster, in total i prefer it over the 2M Black, but I paid for my last NOS Sealed ca. half the price of a new 2M Black.

If you only need a Stylus, i consider this one to be a very good solution:
https://www.jico-stylus.com/product_inf ... ts_id=1562

With this Stylus it pretty exactly sounds like a 2M Black but for much less money (however again the Stylus on the 2M Black will last longer).

Another Option is to look for the red bodies ND-45E, which is a much better fit and soundwise more transparent (better illusion of Room, more precise Positioning) than any solution with the ND25E. (I however would spend the money on the OEM-Shibata)

Mike

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Re: Sony Ps-x75 Important notice re Main MicroProcessor MB88

Post by brinsmeads » 13 Apr 2018 23:12

Mike ..

Thankyou for your involving and very interesting take on the cartridges, I’ll take that onboard….. I didn’t future proof the XL45A in regard to stocking up on stylus all those years ago…..I’ll blame that on the advent of CD’s which had me mesmerised for many years.

You mentioned the ‘Jico’ stylus, thats very good info…thankyou again,
I’m very happy with this lead on the ‘Jico ‘Shibita Stylus, that will give me similar results as the current Sony Stylus.
I’ll take that route.

Interestingly I was taken by the 2M Cartridges and have had thoughts of giving one on their cheaper models a try. From your experiences, none of the 2M lineup, will fit the Sony SH160 Headshell because of the lack of allowable adjustment travel……so that leaves me with fitting to the SH155/165 headshell.

Cheers Rob

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Re: Sony Ps-x75 Important notice re Main MicroProcessor MB88

Post by brinsmeads » 16 Apr 2018 23:25

The Sony SH160 Carbon Fibre Headshell comes in with XL45A (with spacer, screws and nuts) at a weighty 18.31g all up

Allowing for an advertised weight of 5.5g for the XL45A Cartridge brings it back to 12.81g
for the Sony SH160 Headshell (inc spacer, screws and nuts)
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SH160 Carbon Fibre Headshell with XL45A Cartridge 18.31 grams.jpg
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Re: Sony Ps-x75 Important notice re Main MicroProcessor MB88

Post by brinsmeads » 25 Apr 2018 00:20

Notes regarding the seized arm lifter on the Sony PS-x75, which is a common issue with this model.

When you have the motor assembly stripped down, put a drop of oil on the top side of the arm lifter and work it down the shaft from the top.....by repeatedly pushing the circled arm lifter shaft end...quite often the arm lifter will be seized
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Circled is the Lifter Shaft on the PS-x75.jpg
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Re: Sony Ps-x75 Important notice re Main MicroProcessor MB88

Post by brinsmeads » 09 May 2018 22:04

An overview of the Coil cam Assembly that gets slowed in its rotation by the hardened grease.
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Sony PS-x75 Cam Coil Assembly overview .jpg
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