Electronics > Repair
ADVANTEST R9211B
<< < (17/39) > >>
stfjohn:
Trigger pod 06, 07, 08 : nothing changed.
m k:
Pictures are rational and real I/O map seems to be quite different, so a pictured one can be only a principle map and for now program error is no more.
But now you must explain a bit how you made those pictures.
I was expecting that _CS POD line going down is visible.

We also know that CRT controller is accessed, so its _CS line goes down, but now it's missing.

Pictured addresses
5E00xx POD 13 32081 21 _SPC FPU
5E04xx 5E08xx 5E0Cxx

5E10xx 5E14xx 5E18xx 5E1Cxx

5E20xx POD 11 62421  2 _CS0 RTC
5E24xx
5E28xx POD 12 62421 15 _CS1 RTC
5E2Cxx POD 14 8279 22 _CS KBC

5E30xx 5E34xx
5E38xx POD 09 71054 31 _CS U86 timer
5E3Cxx

5F00xx
5F04xx POD 15 9914 3 _CE GPIB
5F08xx
5F0Cxx POD 10 68450 17 _CS DMAC

Missing
POD 06 63484 5 _CS CRTC
POD 07 71054 31 _CS U52 timer
POD 08 71054 31 _CS U67 timer
stfjohn:
I took the measurements exactly as you suggested. The only doubt is that pin 5 of the 63484 is not the one in the photo where I soldered the strip...
m k:
I'd put it to same position.
So for now a guess is that "no change" is CRTC.

Earlier stuff,
picture of reply #78, how was that triggered?

Lower part of ROM module, leave it if it's difficult,
connector side has probably some RAM chips, but other end has also something, more RAM chips or something else?

So I've been seeing things again.
ROM board J2, instead of up or down it's obviously connecting a pin of external something.

Can you easily connect a POD pin to ROM board HC240 pins 19 and 1?
It's for finding MODESET, just leave it if it's too complicated.

Can you scroll analyzer screen left and right, can you see somewhere that _CS POD pin goes down?

Few logic chip IDs needed.
Don't do it if you can't do it without dismantling the current setup, not that important.

1 left of DMAC and 5 under it, 1 is clear, rightmost seems to be 139.
1 right of FPU and 2 under it.
7 around a bottom right corner, the bigger one seems to be 74F something, but maybe not.
stfjohn:
I did the scans again anyway, because I noticed that, for each trigger pod, the scan varies at least 4 times before stabilizing.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod