Mac IIci replacement diode

[captjon320]

Recapping another IIci board and noticed that one of the small black diodes is missing from Q3. I assume it is the same diode that is on D3, D4, D5?

I need to purchase a replacement, but haven’t figured out what to purchase. Any help would be appreciated.

I have attached some pictures for your reference.

 

[volvo242gt]

Just checked the board that I picked up for my IIci. Q3 is either 1AMW or 1/4MW. D5 on my board is marked 5DW. Same with D4, etc.

 

[mdeverhart]

FWIW, a “Q” reference designator is usually a transistor, not a diode. Hopefully the part markings that volvo242gt provided will help.

 

[captjon320]

Thanks for all your help and also the clarification between the “Q” and “D”, I will order one up and get this fixed.

I appreciate it.

 

[captjon320]

Update one this. I actually found the tiny transistor in the bottom of the case. I soaked it in IPA, cleaned it up and soldered it back in place.

Mac IIci is up and running again.

Thank you community for all the information.

 

[imactheknife]

Wow, those things are tiny.. but same thing, lost one on the carpet, and low and behold i found it lol., unreal.. glad you found yours too

 

[mdeverhart]

I actually found the tiny transistor in the bottom of the case. I soaked it in IPA, cleaned it up and soldered it back in place.

Glad you found it and got the IIci working!