Tektronix TDS-540 Console Port?

[EB5AGV]

Hi all,

I am working on a Tektronix TDS540 which, as most units, has some ACQ board problems. I have already carefully cleaned residue and replaced caps and have also removed some faulty opamps and TTL circuits, which will be soon replaced by new ones.

But I don't know how to get into the serial console port for detailed troubleshooting. I have read about building an adapter. Could someone let me know how to do that?. My unit does not have Option 13. Should I have it?

Best regards,

Jose

[picburner]

Hi,

this is the TDS console port schematic that I made several years ago:

[EB5AGV]

Hi,

this is the TDS console port schematic that I made several years ago:

Thanks!. I will build one myself 

It will be a very useful tool to troubleshoot this unit, I am sure.

Regards,

Jose

[piotekp90]

Which port is a console port J37 or J40? I have read many topics about console port but I still don't know to which connector I should connect the converter. I see that orginal RS232 connection board is connected to J37.

[picburner]

J40 is the console port, J37 is reserved for opt 13 serial/parallel port.

[piotekp90]

I have redrawed your schematic and now I'm working on a PCB layout. Do I understand the J40 pinout correctly?

[coromonadalix]

To be sure, while unpowered
Check the grounds and data pins going to the mcu with an ohm meter if they are at the right pins would be a start ...

[picburner]

J37?? I guess you meant J40.
However the pins are marked right.
Keep in mind that in my schematic U1 (MC68681FN) is in PLCC-44 not DIP40.

[piotekp90]

I meant J40 (sorry my mistake). I have prepared schematic for PLCC44 version like in your schematic.