Pks-digiplan sd2 driver IC help please

[Swarfing]

Asto

Glad you got somewhere with it.

[asto]

Asto

Glad you got somewhere with it.

Swarfing, how did you manage to get to the TIP32C which is the best replacement without real data of the old transistor. Because PKS0320 is not a valid code for this part. I did not know this when I started this thread.

It is printed on the old transistor but it has to be something like irving said. This code does not belong to any known transistor family.
Anyway my SD2 drive is alive again and runs fine.

Now I have to see how much hope do I have to fix the problem for my x-axis stepper motor losing direction.

cheers

Asto

[Swarfing]

I used to work for motorola in a past life. It was common for them to disguise parts like Irving said. They would always use part of the original data in the name though so it was just a case of searching using PKS and 32.

[asto]

I used to work for motorola in a past life. It was common for them to disguise parts like Irving said. They would always use part of the original data in the name though so it was just a case of searching using PKS and 32.

This isn't a drive question but, again this module(Parajust single to three phase inverter) carries coding which is not common for TO-3 Motorola transistors.

cheers

[irving2008]

Educated guess... 2SC901 NPN,.... if PNP then maybe MJ901 darlington (but doubt that)

...Then I have another one for you Swarfing..

This isn't a drive question but, again this module(Parajust single to three phase inverter) carries coding which is not common for TO-3 Motorola transistors.
Can you tell what type these transistors may be?

cheers

[Swarfing]

Asto please don't confuse me with some genius in component identification. Irving is probably in your best ball park for this one. It was an educated guess with the last one and a power of deduction. Looking at the age of the rest of the components I would not even try to repair this...........There are some limits to when you just have to let go of this stuff. To also put something into perspective i worked in there 900/1800 phone division a very long time ago.

[asto]

...Sorry for making you feel this way. My intentions were not even close to this.
Well, l can do more reading than writing in the future. Yes, I can do that. Besides, I am not writing in my language.

Again sorry.

kind regards

Asto.

[asto]

Thanks Irving!

My DMM shows these are NPN ones.

cheers

[asto]

...i2i trust me. What you see in the second picture is what I took out from the SD2.
If a similar PKS-DIGIPLAN called cd20 exists I totally disregard. But this is my chance so please educate me.
How many Amps drive is that cd20 capable to deliver. Probably the machine you took this from is a more powerful one compared to the little Orac.
And this was not the first time the SD2 needed to be dismantled for fixing. In the past, it blew a 40xxx series CMOS. The CD40106.
But today it looks a bit different because I have added DIP sockets for every single chip. and the appropriate sockets for transistor or diode in the PC boards.

cheers

Asto

[asto]

Unbelievable!

I do not know many people capable of finding this without data.

I am not an experienced service person but I like dealing with stuff like that.
Saves money as well.

kind regards Swarfing!

ps I hope to see you in my next thread starting tonight.