Electronics > Repair
ADVANTEST R9211B
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stfjohn:
Here some pictures of the motherboard.
stfjohn:
Idem.
stfjohn:
The battery is good!
m k:
It needs more permanent memory.
Can't see what the gold top is, NS32 something?

Upper side is floppy and CRT.
Lower left has keyboard, controller has also an LCD style display part, beside it is 8k ROM. it's not enough.
Lower right is GPIB stuff.
Center square is not visible, but not needed either.
Center triplet under CPU is so center that the thing probably wouldn't display anything if there is a fault.

Since keyboard controller has that display part it can put out very primitive stuff, if implemented.
How is that lower left connected, both connectors in use?

In front of front euro connector are bus terminals.
Is there anything displayed if you operate the machine without any of to end side bus cards?

It should be possible to put any card to any slot, but who knows.
You can try different combinations.
Start filling from crystal end, if possible.

LS244 2nd left from upper crystal has some texture issues, some picture stuff only?
Those used to be less robust back then.
stfjohn:
Thanks again for your kindness. The golden part is NS32081D-10J. The central square is TMS32025GBL. The Eprom board (Mitsubishi M5M27C101k-2) is connected to the J9 connector at the bottom left: 16 in total. The switch on the board in question works well. I tried to move the various contacts: normally 2 and 5 are ON. Putting them all OFF also makes the writing on the screen disappear, which reappears by putting 5 in the ON position. I tried to remove and put back all the boards, but nothing changes. Removing the Eprom board, however, all the LEDs on the front light up and everything remains still, obviously... In fact the LS244 and also the 74157 underneath seem a bit shabby...
Best regards.
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