| Electronics > Repair |
| ADVANTEST R9211B |
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| m k:
LS244 is 4+4 bus driver, F157 is 2to1 x4 data selector, easily connected together. 8 bus connectors are also easily 4+4. But those chips are also constantly in use, so easily picking up some wear over time. Good to know that missing ROM card has some visible effects. Means that it's at least partially present and available. So the gold top is a Floating Point Unit. Its location is a bit odd, something like not central. Is a connector above it in use? Topmost bus connector seems to be different. (is there a better name for eurocard connector) Between it and next connector are more bus drivers. Maybe ROM card and this topmost is a minimal installation. Possibly some switch changes are also needed for that. Very difficult to continue if only info is that earlier text or not. I'm quite sure some primitive console type boot info is available somewhere. Back has some trigger connectors above GPIB, are they from J19? There is another pinheader set near by, maybe J17, is it in use? It's not far from JTAG. |
| stfjohn:
The connector above NS32081 is used to connect the optional printer. A (working) stabilizer board is connected to bus J8 which supplies power (+15V -15V -24V) to all bus below. J17 connects a video output on the back. J19 connects SMPLG CLK and TRIG inputs and outputs, always on the back. I ordered the LS244 and F157 ICs. I will try to replace them. |
| stfjohn:
I changed the LS244 and 74157 ICs, but, unfortunately, nothing changed: always the same message on the CRT. |
| squadchannel:
There is a lack of information on R9211 on the Internet. (Advantest is also reluctant to actively publicize resources) Currently, a maintenance manual is listed on eBay. It can be called a service manual as it also has schematics. Can you purchase it and scan the PDF for future use? eBay auction: #116111410582 |
| m k:
Would you donate a part of cost? |
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