Search results

Hi, not easy to help, but sound is generated by U4 (DFAC) if you have already swapped chips, not your issue here. Moreover, this chip is almost never bad. Probably a bad or broken trace in the capacitor area. Keep in mind that the bad trace can also be located in the other side of the board.

Thanks, yes was thinking the same after looking at the schematics.

No, as said in my post, Analog board was tested ok with another board, issue is in the Logic one.

I have found a cheap SE/30, cleaned the board, new caps around. The board got a chime but I have no vertical sync. I have just a bright line in the middle of the screen. The analog board is not the issue, tested ok. Logic board is the problem. So far, I have tested the continuity from the...

Probably not an issue with the floppy drive, the drive should try to read, not to format unless required by the system. Maybe a bad Swim

Hi, you have to adjust the image with the two tabs present in the yoke side. You will see two cadmium plated tabs next to the coil, most of the time some paint is applied to avoid those rings from turning. Pushing (will make the ring spin) one or another will move the image up or down and left...

I agree with Arbi, but not easy when you only have one unit to play with and no spares to swap

Can be a lot of things, but you can start with basics. Only the bottom row of ram chips is required (the one next the keyboard) for a start. So remove all chips and only keep the better looking ones. Can be a Rom issue also.

I agree, checking for voltages is easy enough (at the floppy port) if voltages are ok, try hitting the side of the AB board with a wooden stick, some broken joints are hard to see. The fact that the floppy drive is trying but not achieving is also a sign of bad voltages. If you are not too...

I have got a damaged spare board, so i will swap parts.

The more i think about it, the more i believe this is related with one of the Bourn filters... will let you know

The trouble is you don't have sound either, this is strange as both issues are not related, except if you have a wiring issue.

I wasn’t thinking about the rear connector, but yes can be the issue. Thanks

Hi, have a strange issue in one Plus. Working ok, booting from HD or floppy but displaying the message « disk not readable - erase or eject » The message is coming again and again, whatever the erase or eject button is selected. The floppy is not the issue, tested and working fine in...

H11AA1 is still available

yes this is the one, UE8 (74LS166D) https://www.demand.nu/retrotech/74ls166d.html You will need a soldering iron at least, but probably easier with hot air.

IIRC 2Mb ram modules are not fully supported by the SE/30 (only the IIsi can use those)

Your issue is related to UE8, part number is 74LS166 (don’t use the HC one) near a leaky capacitor, common issue goes bad frequently.

Never seen this before, the only difference between 800k and FDHD is Rom and SWIM, you can even upgrade the former one in last one. For me more a peripheral issue, keyboard or mouse not the issue ?

The only thing i am thinking is…maybe stretching the data cable is connecting something loose. I will check for a bad solder joint (connector side) or broken cable.