| Electronics > Repair |
| ADVANTEST R9211B |
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| 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. |
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