HP97 The journey begins
|
10-18-2021, 12:37 AM
Post: #450
|
|||
|
|||
RE: HP97 The journey begins
(10-17-2021 11:47 PM)hpux735 Wrote: This is very helpful, thank you. I'll look at it more closely than just assuming it's the inductor-based failure case you describe in your notes document. There are no inductors in the 97, just simple transistor switching. I wouldn't have thought a transistor shorting in the driver, but you never know. I would think more likely a display failure, but I hope not. Hmmm, I modified my post about the transistor but must have hit the wrong button, no matter. The transistors should be PNP types, I was looking at MMTB2907. My pads were setup as CBE, but should be EBC. I will redo the board today and pm the gerber files if you like. I'll also get some made up when the 97 board goes in. cheers Tony |
|||
« Next Oldest | Next Newest »
|
User(s) browsing this thread: 4 Guest(s)