Doesn´t the homepin baord have 2 test switches, where you can test the directions???

Means, when you press first button, motor turn CW and if you press the other button motor turns CCW, correct??

And you also tested the voltages on the homepin board at the TPs for +5V and +12V? Are these voltages present and OK, if yes, we will do another test ....

OK, we next ground the 2 inputs separately.

Therefore you should build a short "testcable" (eg. a wire with an alligator clip or so to clip it to a good ground point), one side connected to GROUND (somewhere) and with the other end of the testcable you do the following:

1.
connect to Input DIR1 (you can e.g. put the wire to banded side of Diode D2) - Motor should turn CW

2.
connect to Input DIR2 (you can e.g. put the wire to banded side of Diode D3) - Motor should turn CWW

Do NOT do this test, while the clock test menu is running. And be careful, not to cause a short.

Post the results, what happens,

1.
when you ground DIR1

2.
when you ground DIR2

The purpose of the test buttons is the same. But as I do not have the schematics of the homepin-board and I do ot know, how he wired his test buttons, we do it this way. If homepins testbuttons ground behind the optocouplers, we cannot test, if the optocouplers are OK.

Using my way and motor turns cw and ccw, the homepin board is OK, if not, we can identify, if one of the optocouplers on the board is bad.

You eagle-eye

Indeed, both resistors have the wrong value.

Replacement of both resistors and at least U1 optocoupler is needed. It seems, that U2 is still alive.

By the way: R3, R7 + R8 are silkscreened 2K7, but installed are 2K6, but this should not matter in this application.

wrong resistors (resized).JPG