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maestro
Registered: Mar 2004
Posts: 716 |
1541-2 issue
hi i wonder if anyone out there can help...
i seem to have a problem with my 1541-2 drive....this doesnt happen all the time but it is getting more frequent and becoming a problem...
when i 1st switch my c64 on and then my floppy drive the drive light comes on and the head starts spinning and both keep going and going and going....eventually after alot of powering off and on the drive starts as it should do...
does anyone know why this drive might be doing this and how to fix this issue
thanks
maestro |
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null
Account closed
Registered: Jun 2006
Posts: 645 |
I have the exact same issue on my 1451-II drives, I'd also like to know why it happens and what can be done about it.
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http://zomgwtfbbq.info |
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Oswald
Registered: Apr 2002
Posts: 5017 |
there are more repair guys on lemon, I'd ask there. |
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SIDWAVE
Account closed
Registered: Apr 2002
Posts: 2238 |
i had same problem.
it was one of the CIA chips in the C64. |
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Moloch
Registered: Jan 2002
Posts: 2891 |
---
Crimson Twilight Dev Updates [C64 CRPG] |
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Black Belt Jones
Account closed
Registered: Apr 2002
Posts: 57 |
great chart(saving a copy)..
i had similar dramas with 2 different mkII drives, turned out to be the power supply. |
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j0x
Registered: Mar 2004
Posts: 215 |
Same here: A power supply issue in my case. |
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Stryyker
Registered: Dec 2001
Posts: 465 |
I experienced the same issue because of PSU. |
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ready.
Registered: Feb 2003
Posts: 441 |
I had kind of similar problems and discovered that the PSU gave more than 6V instead of 5V. I got a new PSU and now it works fine. Interesting that not all 1541-II behaved the same with the faulty PSU, some of them worked fine.
I built my own heavy duty PSU for both C64 and 1541-II, based on a transformer + switching regulator + overvoltage protection in case of failure. I will eventually provide these PSUs in kit after this summer I hope,my prototype:
http://www.cbm8bit.com/projects/ready/
Lemon thread:
http://www.lemon64.com/forum/viewtopic.php?t=27552&highlight=he..
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maestro
Registered: Mar 2004
Posts: 716 |
thanks for all the good comments..
so it looks like the psu is to blame...
now where to get a new one???
ready you can make me one if you like and ill pay you :) |
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ready.
Registered: Feb 2003
Posts: 441 |
I can't. I could supply you with a PSU kit once it is ready, but you have to solder the parts yourself. This is because for selling a PSU, a certification is required and that costs a lot, which would make the single PSU unit unaffordable.
Most likely the kits will be a bunch of components to be soldered on a board (already drilled and with all the traces). and of course detailed instruction on how to proceed with the soldering.
Let's see what I can come up with this summer.
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maestro
Registered: Mar 2004
Posts: 716 |
ok that would do ready...
been a while since i soldered but im sure i could do it with some good instructions lol
let me know what you come up with :) |
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SIDWAVE
Account closed
Registered: Apr 2002
Posts: 2238 |
www.docshardwarekiste.de made a mini ATX psu for me, for C64+diskdrive - price incl. shipping was ~70 euro.. |
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Black Belt Jones
Account closed
Registered: Apr 2002
Posts: 57 |
yeah a pc psu is definately the way to go, when mine packed up i just chopped off the 1541 side of the power lead (at the power supply/brick end of course!) and tacked on a PC hard drive power socket. this way if the pc psu ever dies, you can just unplug the lead from it and plug it into another one.
I used a non atx PSU that i had lying around, cos all those years ago i couldnt work out how to switch an atx supply on without having the motherboard present :) the drives being supplied with this (a mkII and a cmd) are happily rocking to this day, approaching 10 years now with the same psu. |
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Wisdom
Registered: Dec 2001
Posts: 90 |
I had exactly the same issue with my 1541-II and it was because of the original PSU. I use a PC PSU now and my 1541-II works completely fine.
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ready.
Registered: Feb 2003
Posts: 441 |
actually paying somebody for selling a completely built non certifiede PSU is legally not so safe. In case somebody gets hurt, complications might occur. Furthermore transformer based PSUs are much safer for te hobbist to fix and mess with.
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maestro
Registered: Mar 2004
Posts: 716 |
ok the pc power supply seems to be the way to go
can someone supply me with some information on how to build one myself as this issue with my drive is doing my head in lol |
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Cresh
Registered: Jan 2004
Posts: 354 |
http://www.zimmers.net/anonftp/pub/cbm/documents/projects/drive..
Also check lemon64 forum. |
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maestro
Registered: Mar 2004
Posts: 716 |
exactly what does this mean???
"1. Cut the cable of the 1541-II power supply by the side of the brick." - does this mean just cut the cable from the psu that goes into the 1541-2?? if it does then i should be able to make this no problem at all....
i take it i only need to keep the cable side that fits into the back of the 1541-2...the rest can go in the bin yes??
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Impetigo
Registered: Jun 2004
Posts: 30 |
Instead of PC power supply you can use a "switch mode" power supply with 5/12V output. I'm using the one came with my external 3,5" harddisk enclosure. Something like this:
 |
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Black Belt Jones
Account closed
Registered: Apr 2002
Posts: 57 |
You got it dude, the rest goes to the bin. |
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maestro
Registered: Mar 2004
Posts: 716 |
now this is getting interesting...
impetigo did you just solder the wires from the 1541-2 cable directly to the pins of the switching cable?? |
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Impetigo
Registered: Jun 2004
Posts: 30 |
Actually I bought a female connector to connect the power supply. I soldered this (female) connector to the 1541 cable. Then I simply connect them together.
But if you want you can cut the connector of the power supply and solder your 1541 cable to the power supply cable. Cos' soldering to the pins of the connector is gonna be really difficult.
Also, don't forget to double (maybe triple) check your work. You wouldn't want to mix 5V, 12V and GND lines.
Good luck. |
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maestro
Registered: Mar 2004
Posts: 716 |
ok i sorted the new psu from the switching charger...but i still get the blinking light issue :( |
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maestro
Registered: Mar 2004
Posts: 716 |
ok the new power pack is indeed working :)
1 drive is now working properly :) so the derby ram collection is back on track
1 drive still has a problem so ill start having a look at this drive when i can
thanks for everyones help |
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maestro
Registered: Mar 2004
Posts: 716 |
ok I have another question.
I made the cable above.
could I do the same for another similar psu?
this is the information on the other psu
pin 1 5vdc 600mA
pin 2 gnd
pin 3 nc
pin 4 gnd
pin 5 12vdc 420mA
anyone could help that would be great |
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maestro
Registered: Mar 2004
Posts: 716 |
I will answer my own question now :)
yes you can do this. |
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Black
Registered: Dec 2002
Posts: 12 |
Hello all,
yesterday a friend of mine sent me a video. C64 + AR + 1541.
This is an old 1541 that works for a while, and then it makes the same error. He said after idle it works fine, but than again it fails again.
He tried to cool down the drive, but no luck.
0 "01" PRG
0 "02" PRG
0 "03" |73,CBM DOS V2||||||||||||||
Thanks for any ideas. |
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strik
Registered: Feb 2009
Posts: 4 |
The "73,CBM DOS" indicates that the drive resetted while reading out the directory. I cannot tell if the reset is a HW reset, or if it is just a SW issue.
Additionally, the symbols that look similar to pipes ("|") are the normal behaviour you get from the C64 when you keep reading past the EOF.
Can you measure if the drive actually resets when this happens? Can you measure the voltages and look if they are considerably lower than 5V and 12V when this problem happens? |
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Black
Registered: Dec 2002
Posts: 12 |
Measured, they are above 5,1V and above 12,3V.
It seems that drive motor stops after reset when it is standalone, but keeps spinning connected to a 64. |
