Amiga.org
Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Framiga on August 09, 2004, 01:58:41 PM
-
@ all the technicians here :-)
1 week ago, after a great, evil crash my PPC (a 604e on a CSPPC Phase5) is gone :-(
The board still working with the 060-RAM and SCSI but the PPC isn't recognized with both PowerUP and WarpOS (tryed all the possible way).
Now i've checked the PCB and i've found a 1uf-35volt tantalium capacitor, in short on the back side of the board.
Now i'm not sure if this capacitor is really in short or it is shorted by software or by another component, can someone tell me if this component (with the CSPPC out of the computer) is in short even on your board?
HERE (http://xoomer.virgilio.it/cieffeeditingvideo/pic/CSPPC-2.jpg) the picture of the rear side of the CSPPC and the capacitor in the red circle. (attention 1MB picture)
Thanks a lot for the help.
Ciao
-
Permission denied?
You could always send it to DCE! :-P
-
File is forbidden.
-
I hope it turns out okay framiga
-
@whabang, Turambar:
Click on the link and then reload the page, that worked for me.
/Patrik
-
not for me
-
@whabang:
Can you load this (http://xoomer.virgilio.it/cieffeeditingvideo/pic/) link?
/Patrik
-
thanks to all for the reply :-)
yes here too, sometimes i need to reload to see the pic.
Anyway, if someone can do those test (a DMM on a continuity check, is enogh) i'll remember all you, in my prayers :-)
Cheers
EDIT- strange . . with AWeb 3.5.01beta and Voyager3.3.126, the URL works.
With IB2.3, i must reload the page . . . .?!?
-
@framiga
I feel your pain brother....
On one of my CSPPC board I have the same problem. 060, ram and SCSI works as it should, but whenever I try to run some PPC software the computer crashes :(
A friend of mine got a BPPC where the PPC cpu didn't work as it should; it also crashes the computer I think. He downclocked his PPC cpu, and then the PPC cpu came back to life. I'm going to ty it out at least; hopefully I will get my PPC working again. If not I will manage with a board acting as a CS 68060 board.
-
Hi doctorq
so, mine doesn't crash.
It return a message that the ppc.library 44+ doesn't exists (under PowerUP) like it should not be able to found phisically the 604e. (probably NOT powered)
Under WarpOS . . . quite the same.
I think it should be a problem, related to those shorted capacitor . . . or i hope so :-)
BTW . . . . Amiga.fr is down?
Ciao e grazie
-
@Framiga
its very hard to test parts on a card while they are in place. You will get false readings that way because your reading everything in the card that the item is connected to. Thats why they have card testers that run test on the complete card. your best bet would be to see if anyone has a tester that will work. i'm sure only DCE has the proper connectors to hook them up to a tester, but you never know. If you can find a replacement you can alwys remove the part and just see what happens with a new part.
-
Hi Acill
yes i think it is the best thing to do ATM.
Already got the spare part.
Thanks
-
Poor guy, Framiga!
I feel very sorry for you.
If you recall my problems in this thread (http://www.amiga.org/forums/showthread.php?t=6432) you could notice that Castellen (http://www.amiga.org/userinfo.php?uid=424) seems to be very well informed in the topic, mayby he could help?
I think I've seen also some other topic, when someone offered his help in repairing some other's guy board, but unluckilly I cannot recall neither the thread, nor the nicks...
I also fully agree with Acill about measuring any equipment connected to any board - unless you are The Master Of The Power and you can order the electricity to go only through the specified element on the board. ;-)
On the other hand - you have the trouble that ppc.library is not existing - mayby your flash simply lost the contents - tried to reflash it? (Just guessing).
Keeping my fingers crossed. :-)
PiR
-
Hi PiR
thanks to you too :-)
CSPPC hasn't the ppc.library in Flashrom (like BlizzardPPC) but to be 100% sure, yesterday i've reflashed it anyway (latest version) ;-)
Thanks again for the info
Ciao
PS- yes i know Castellen and (to be honest) i really hoped in his help/suggestion (probably he is out for vacation)
-
Hi again,
someone, knows why amiga.fr site is down? at least to know the e-mail address?
Which is the nickname, of the Amiga.fr owner here?
Cheers
-
I think voxel knows him
-
oh well, Cyberus . . .thanks :-)
Have you tryed to go to amiga.fr?
Ciao :-)
-
amiga.fr doesn't load :-(
but it was working only two or three days ago - I visited the site at the end of last week.
voxel knows Jean-Jacques from Amiga.fr - see this thread (http://www.amiga.org/forums/showthread.php?t=7583)
-
I've mailed them, waiting for an answer. :-)
-
I've never owned one of those cards... actually i've never owned anything more powerful than a 4mb+68881 expansion for the 1200 lol
I do know however, during repairs on older models of gigabyte boards; they used 6v caps on 5v rails, after a surge they appared as short-circuit when tested. When removed they were still short circuit. Got to a point when I removed every electrolytic / tantalum / monolythic cap from the board (just for laughs), re-tested between the 5v rail and ground :: STILL SHORT! turned out two power FETs died.
thought i'd just throw that in :-D
On another note, alot of problems with phase5 boards seem to be linked to dry joints, anyone ever tried reflowing those boards using a reflower/rework station? I'd start off by looking up datasheets for the (suspected) failing micros and checking for power at their vcc/vss pins
Best of luck though :-)
-
Hi CodePoet
yes i agree.
The best thing is remove the tantalium capacitor, and test it out the board.
The only hope, is that it is really shorted :-)
I've already tested (all the doable) for dry joints during a previous repair for the damn 060 socket (fixed)
Thanks for the suggestions :-)
PS- i've downloaded and read (ugh!!) the datasheets of the 604e.
The PowerOn sequence is:
GND-> Vdd (core voltage= 1.9 or 2.5v) -> OVdd (I/O voltage=3.3v)
The PowerOFF sequence is:
OVdd-> Vdd-> GND
Now the dubt is, that i have 2 odd values for the Core voltage:
IBM- 1.9v
Motorola- 2.5v
I'll check if are present.
-
Regarding Amiga Repair Center France, their site is down for the moment. They are working on it and it will come up as soon as possible. :-)
-
Thanks a lot, Crusher :-)
-
np :-)
-
Hi all,
i'm still investigate from a software POV.
What is used for the "card.resource"?
Should it be present even on an A4000 KS? or it is A1200 PCMCIA related?
If exists, is it used by the CSPPC? (note that the CS works perfectly with the 060-RAM-SCSI).
Cheers
EDIT- the CSPPC card, is recognized in the Early Boot (Amiga) and has the CS Early setup fully working too (just upgraded to the latest version)
-
card.resource is for PCMCIA handling
-
Could it be that he's got A1200 roms in his A4000?
-
@x56h34:
Yeah, it sounds like that. When I ran a 'version card.resource' on my A4000D with Kickstart3.1/Workbench3.1 it just says 'object not found'.
(edit):
Tried both the A1200 and A4000 3.1 ROM in WinUAE. If I ran 'version card.resource', it said 'card.resource 40.4' with the A1200 3.1 ROM and 'object not found' with the A4000 3.1 ROM. In other words it seems correct that the A4000 ROM shouldnt have the card.resource.
/Patrik
-
@Patrik:
I'll try to do the same when I get back home from work and see what my A4000 roms report. An easy way of checking out of what is present and what is not, is by running SysInfo, as it's got a list of all the existing resources/devices/libraries/etc.
-
Hi All,
no, no no . . .stop the press :-)
I've asked for the card.resource, because i've seen some apps ask for it (SnoopDos).
As never said :-)
Ciao
-
by patrik on 2004/8/13 19:25:10
@x56h34:
Yeah, it sounds like that. When I ran a 'version card.resource' on my A4000D with Kickstart3.1/Workbench3.1 it just says 'object not found'.
yes the same here.
Mine was only a question about this resource.
Never had an A1200
Thanks
-
Hi Patrik,
i've found a defective IC but i'm not be able, to find it (to some dealerlike RS-Distrelec)
The IC (2) are 8 pins SMD SO8 package with marked:
4410
W748
They "seems" op-amp LM748 but i'm not 100% sure.
Can someone help me to know if are the right one?
Thanks a lot
BTW . . .Patrik, have you received back your CSPPC from Amiga.fr?
-
@Framiga:
I first have some questions:
1. If you place the CyberStormPPC upside-down with the side with the fastslot-connector facing you, is it the two circuits in SO8 package to the left, just above the fastslot-connector?
2. Are both of the two circuits identical with 4410 and W748 printed on them?
3. May I ask how you know that they are defective?
If it is the two circuits I think it is (see question 1.), these two circuits are missing on the CyberStormMK3 so they for sure are support-circuits for the PPC604e.
It doesnt feel like and op-amp would be needed for anything on a CyberStormPPC, it seems more probable that these two circuits are 4410 field-effect transistors in a surface mount version, used to create the 2.5V core-voltage for the PPC604e. Here (http://www.irf.com/product-info/datasheets/data/si4410dy.pdf) you can find a 4410 field-effect transistor datasheet. If this is the case, you can order them here (http://www.elfa.se/elfa-bin/dyndok.pl?vat=0&dok=3888.htm).
I still havent got my CyberStormPPC back :(.
/Patrik
-
Hi Patrik
yes they are the right one :-)
Togheter the LTC1430CS (voltage PWM switching regulator and soft start/shoutdown), they supply/regulate the core voltage to the 604e.
LTC1430CS (http://www.linear.com/pdf/1430fa.pdf)
One of the 2, is in short (desoldered and tested)
Thanks a lot for the help
Cheers
-
the new URL of Amiga.fr is:
http://www.bourgogne-informatique.com/Homer.html
Bye
-
:-) sorry double post