Panasonic JU-253-01P Jumpers ???

Nobby_UK · 11 June 2020, 18:22

Found a Floppy Drive in my box of bits:

It only has 1 jumper in the middle of 5 pairs ???

Plugged in it just gives DF0:???

How many jumpers should it have and in what positions
--- there are no obvious markings visable...

lesta_smsc · 11 June 2020, 19:08

I think only some revisions of these Panasonic drives were real Amiga e.g. revision 253-043P I believe came with some A600.

Was this from an Amiga? I wonder whether it is a PC drive that may require correct jumper setting and/or drive mld to make it work on the Amiga.

Can you see what the jumpers relate to?

You need to set RDY jumper (Amiga needs it) and another jumper as DS0 (PC I'm sure is DS1).

Hope this helps.

Update: @solarmon had a similar issue and had some progress on this thread (not exact revision as yours but worth testing it out nonetheless):

http://eab.abime.net/showthread.php?t=98729

Nobby_UK · 12 June 2020, 18:11

Quote:

Can you see what the jumpers relate to?

Only if I strip it right down ---

IE unplug the Red + Yellow connectors

Which I could --- but I don't fancy my chances at reconnecting

Ah well, back to the box

solarmon · 12 June 2020, 19:13

Is that model number correct? Did you mean JU-253-201P?

Nobby_UK · 13 June 2020, 18:44

You Tell Me

solarmon · 13 June 2020, 20:24

Quote:

Originally Posted by Nobby_UK

You Tell Me

OK. I've only come across "JU-253-201P" and can't find anything about "JU-253-01P"

Can you provide a decent picture of the underside of the drive so that we can see the board layout.

Zippy Zapp · 13 June 2020, 20:26

I have a Panasonic JU-253-03T that came out of an Amiga 500. It looks identical but who knows what is different. On the jumper block there is a jumper on the first set on the far left and a jumper on the far right. So basically the two ends have jumpers with the 3 sets in the middle empty.

Hope that helps but no guarantees it will mean the same on your drive.

Nobby_UK · 13 June 2020, 20:49

Quote:

Originally Posted by Zippy Zapp

I have a Panasonic JU-253-03T that came out of an Amiga 500. It looks identical but who knows what is different. On the jumper block there is a jumper on the first set on the far left and a jumper on the far right. So basically the two ends have jumpers with the 3 sets in the middle empty.

Hope that helps but no guarantees it will mean the same on your drive.

Well it is something worth trying

Nobby_UK · 14 June 2020, 18:22

No difference with jumpers at each end...

I think I got this with my 600 and assumed it came from that 600 ???
Spare/Defective ???

Maybe not !
Maybe PC for conversion ?

I see C18/R64 has gone walkies

solarmon · 14 June 2020, 20:42

The picture is not clear enough for me to make out the traces going to the jumper pads.

But if C18 is damaged, and R64 is missing (and with a missing pad) then that may stop it working correctly anyways.

11 June 2020, 18:22	#1
Nobby_UK Registered User Join Date: Jul 2013 Location: Liverpool Posts: 2,602	Panasonic JU-253-01P Jumpers ??? Found a Floppy Drive in my box of bits: It only has 1 jumper in the middle of 5 pairs ??? Plugged in it just gives DF0:??? How many jumpers should it have and in what positions --- there are no obvious markings visable... Last edited by Nobby_UK; 15 April 2022 at 20:13.

13 June 2020, 18:44	#5
Nobby_UK Registered User Join Date: Jul 2013 Location: Liverpool Posts: 2,602	You Tell Me Last edited by Nobby_UK; 15 April 2022 at 20:13.

14 June 2020, 18:22	#9
Nobby_UK Registered User Join Date: Jul 2013 Location: Liverpool Posts: 2,602	No difference with jumpers at each end... I think I got this with my 600 and assumed it came from that 600 ??? Spare/Defective ??? Maybe not ! Maybe PC for conversion ? I see C18/R64 has gone walkies Last edited by Nobby_UK; 15 April 2022 at 20:13.

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11 June 2020, 19:08	#2
lesta_smsc Registered User Join Date: Feb 2012 Location: United Kingdom Posts: 3,192	I think only some revisions of these Panasonic drives were real Amiga e.g. revision 253-043P I believe came with some A600. Was this from an Amiga? I wonder whether it is a PC drive that may require correct jumper setting and/or drive mld to make it work on the Amiga. Can you see what the jumpers relate to? You need to set RDY jumper (Amiga needs it) and another jumper as DS0 (PC I'm sure is DS1). Hope this helps. Update: @solarmon had a similar issue and had some progress on this thread (not exact revision as yours but worth testing it out nonetheless): http://eab.abime.net/showthread.php?t=98729

12 June 2020, 19:13	#4
solarmon Registered User Join Date: Dec 2018 Location: UK Posts: 1,716	Is that model number correct? Did you mean JU-253-201P?

13 June 2020, 20:26	#7
Zippy Zapp Registered User Join Date: Sep 2013 Location: CA/USA Posts: 346	I have a Panasonic JU-253-03T that came out of an Amiga 500. It looks identical but who knows what is different. On the jumper block there is a jumper on the first set on the far left and a jumper on the far right. So basically the two ends have jumpers with the 3 sets in the middle empty. Hope that helps but no guarantees it will mean the same on your drive.

14 June 2020, 20:42	#10
solarmon Registered User Join Date: Dec 2018 Location: UK Posts: 1,716	The picture is not clear enough for me to make out the traces going to the jumper pads. But if C18 is damaged, and R64 is missing (and with a missing pad) then that may stop it working correctly anyways.

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