Electronics > Repair
HP 3468A does not complete self-test, the LCD display all on.
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StrayElectrons:
My corrected.

Edited again, Eventually found what I'm looking for on Intel D8039"-6" means 6MHz version. 

But did not find what I'm trying to find out what  "AHL" suffix means for Intel D8039AHL?

Thank you and cheers,
cruff:
The service manual says it uses a 6.003 MHz crystal.
StrayElectrons:
I know because the service manual says this crystal is 6.003MHz.

But the other datasheets for D8039-6 is not clear till I found another datasheet after few days of search answered my question about "-6" meant.
The datasheet says intel processor without "-6" is rated up to 11MHz.

But I'm still not sure what "AHL" means for D8039AHL?

Thank you and cheers,
fenugrec:

--- Quote from: StrayElectrons on December 23, 2024, 06:32:10 pm ---But I'm still not sure what "AHL" means for D8039AHL?

--- End quote ---

For the 8039 : apparently nothing, see screenshot. I wouldn't worry too much, just backup your cal, get a "new" 8039, socket it, move on. That is, of course, if you're sure there's not another device on the bus that is shorting the Dx pins and causing the weird levels.
StrayElectrons:
I rechecked and looked more carefully at data sheets and I'm now most satisfied with details I needed.

All the parts ordered are turned pin sockets, LP8039AHL processor, 54LS373.   Now I have to wait few weeks.

Once I have parts, and replace these and if that fixes this, will let you all with new updates.

Cheers,
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