emulatorII-list

All the voltages are the from the PSU, however, 5V rail is at 5.7V

anyone know if this is too high ??

If so, does trimmer R116 on the PSU board change the 5V rail?
Or any ideas what I can try?

thanks


--- In emulatorII-list@yahoogroups.com, Robert Van Kuran <guitar5l50@...> wrote:
>
> Can anyone confirm the device number and IC number of the debug Eprom
> Sent from my iPhone
> 
> On May 30, 2012, at 1:56 PM, "hazchem88" <analoguesolutions@...> wrote:
> 
> > I'm not sure. I'm not the right guy to ask.
> > 
> > I bought these
> > 
> > http://www.ebay.co.uk/itm/330727856155?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649#ht_1881wt_1346
> > 
> > --- In emulatorII-list@yahoogroups.com, Robert Van Kuran <guitar5l50@> wrote:
> > >
> > > Were the 3 you ordered from Doug all the same device type number 2764 ICs?
> > > 
> > > Sent from my iPhone
> > > 
> > > On May 30, 2012, at 1:39 PM, "hazchem88" <analoguesolutions@> wrote:
> > > 
> > > > robert, this is like the blind leading the blind! I'm not sure at the moment which chip slot the Debug goes in, I think it's the left one
> > > > 
> > > > The EII service manual gives a lot of details. about the debug, anyhow to use a terminal
> > > > 
> > > > --- In emulatorII-list@yahoogroups.com, Robert Van Kuran <guitar5l50@> wrote:
> > > > >
> > > > > After scouring through the schematics i found IC42 is a 2764 chip and it is one the schematic 7-12 main cpu ram&rom page 7 of 26 in the schematics doc.
> > > > > 
> > > > > Is IC42 the chip that needs to be changed out for the debug chip?
> > > > > 
> > > > > Sent from my iPhone
> > > > > 
> > > > > On May 30, 2012, at 12:33 PM, "hazchem88" <analoguesolutions@> wrote:
> > > > > 
> > > > > > I know Doug.
> > > > > > 
> > > > > > I've bought a Debug EPROM (in a set with Scanner and Main, which I needed anyway for my other EII.
> > > > > > 
> > > > > > BUT, Just read somewhere that to use it you need a 'hyper terminal plugged into the serial port'.
> > > > > > Damn! something else I need!!
> > > > > > 
> > > > > > Also, will leave re-capping as a last resort. I'm getting conflicting messages. Some say it's vital and necessary, others, who equally know their stuff say it won't make any difference.
> > > > > > 
> > > > > > Will try Debug first!!
> > > > > > 
> > > > > > --- In emulatorII-list@yahoogroups.com, Robert Van Kuran <guitar5l50@> wrote:
> > > > > > >
> > > > > > > I ordered mine through Doug Martin at EALnet.
> > > > > > > The forum has the file. I am however now uncertain that I got it flashed to the correct IC type device number.
> > > > > > > It is said the diag eprom is to be swapped out with the main eprom.
> > > > > > > 
> > > > > > > Mine is in the shop as Ive no space or quite the experience in electronics to feel confident performing repairs myself.
> > > > > > > Can you tell me what is the IC device number for the main eprom chip?
> > > > > > > Trying to verify in case I need to reorder the debug to be flashed on a different IC device type.
> > > > > > > 
> > > > > > > Thanks.
> > > > > > > 
> > > > > > > Sent from my iPhone
> > > > > > > 
> > > > > > > On May 30, 2012, at 11:14 AM, "hazchem88" <analoguesolutions@> wrote:
> > > > > > > 
> > > > > > > > Thanks for the tips. I might try re-capping the PSU. But I will try a few other things.
> > > > > > > > 
> > > > > > > > Does anyone know where I can buy a Diagnostic EPROM? Or can some one help me out?
> > > > > > > > I've burnt EPROMS before, but I no longer have an EPROM blower. It would prob be cheaper just to buy one already done than buy a whole blower (and try and get it working with windows since they are nearly always serial port devices not USB!!)
> > > > > > > > 
> > > > > > > > One other 'pro' I spoke to says it sounds like memory IC problems, so will clean the remaining memory sockets
> > > > > > > > 
> > > > > > > > --- In emulatorII-list@yahoogroups.com, Robert Van Kuran <guitar5l50@> wrote:
> > > > > > > > >
> > > > > > > > > The gurus around this forum say its good practice to replace the caps.
> > > > > > > > > Especially if the original electrolytic caps are indeed what is there now.
> > > > > > > > > This will help to eliminate any possible issues regarding that variable.
> > > > > > > > > 
> > > > > > > > > My EII had a similar but not exact intermittence while booting im in the middle of the next step of reseating all ICs and cleaning their respective sockets. Hopefully we can both get our EIIs working in a stable fashion.
> > > > > > > > > 
> > > > > > > > > After that step I will get into the Debug EPROM procedure.
> > > > > > > > > Hope that helps let me know.
> > > > > > > > > 
> > > > > > > > > Sent from my iPhone
> > > > > > > > > 
> > > > > > > > > On May 30, 2012, at 8:22 AM, "hazchem88" <analoguesolutions@> wrote:
> > > > > > > > > 
> > > > > > > > > > 
> > > > > > > > > > The PSU 'appears' to work, as in it did boot up once, and nearly a couple of times. The 5V rail is all OK.
> > > > > > > > > > 
> > > > > > > > > > So is replacing electrolytic caps just a tip for dead PSUs, or do you think it's worth a shot in my case?
> > > > > > > > > > 
> > > > > > > > > > --- In emulatorII-list@yahoogroups.com, Robert Van Kuran <guitar5l50@> wrote:
> > > > > > > > > > >
> > > > > > > > > > > Try replacing all of the electrolytics in the PSU.
> > > > > > > > > > > 
> > > > > > > > > > > it seems to be the first thing recommended to try on several posts.
> > > > > > > > > > > Let us know if that does the trick.
> > > > > > > > > > > 
> > > > > > > > > > > Sent from my iPhone
> > > > > > > > > > > 
> > > > > > > > > > > On May 30, 2012, at 6:20 AM, "hazchem88" <analoguesolutions@> wrote:
> > > > > > > > > > > 
> > > > > > > > > > > > Just got an EII yesterday. 
> > > > > > > > > > > > 1st few times switched on, it got to boot screen, and no further.
> > > > > > > > > > > > So I opened up, reseated a few memory ICs around what I think is first segment (IC13 area?) - used some deoxit and replaced.
> > > > > > > > > > > > 
> > > > > > > > > > > > Then this time, it booted up and all seemed good. A Bank loaded. I then tried to load a bank from another floppy, started loading, then after a bit froze and blanks screen.
> > > > > > > > > > > > 
> > > > > > > > > > > > Since then I have removed and reseated just about every IC on the digital board.
> > > > > > > > > > > > 
> > > > > > > > > > > > Generally all I get is black blocks on the top row of the LCD, nothing on second. And usually ALL of the LEDs lit.
> > > > > > > > > > > > about 1/10 times I might get the boot screen, but no further (doesnt try to read discs).
> > > > > > > > > > > > 
> > > > > > > > > > > > So in theory most of the machine is OK since I got as far as loading 1 bank.
> > > > > > > > > > > > 
> > > > > > > > > > > > Wondering if this is a bad connection somewhere.
> > > > > > > > > > > > 
> > > > > > > > > > > > Maybe RAM/Scanner problem?
> > > > > > > > > > > > 
> > > > > > > > > > > > Can any suggest anything I can try?
> > > > > > > > > > > > Which Ram ICs should I check first,
> > > > > > > > > > > > Any tips appreciated.
> > > > > > > > > > > > I am very good with electronics, however, not too familiar with EIIs (but learning fast!)
> > > > > > > > > > > > 
> > > > > > > > > > > > BTW, oddly, my boot up screen is unique(?)
> > > > > > > > > > > > 
> > > > > > > > > > > > **Emu 3-1 SC ***
> > > > > > > > > > > > Mulhouse 1-02-90
> > > > > > > > > > > > 
> > > > > > > > > > > > custom? maybe just the message has been changed? (maybe Mulhouse is one of the previous owners?)
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