The 20mhz crystal was there at dmitris request to see if my 16 crystal was bad.
Synthex wrote:Well, I received your package this morning.
First findings :
- 2 diodes (1N4148) are welded to front !!
- Why did you solder the 20 MHz quartz ?
Synthex wrote:Well, I received your package this morning.
First findings :
- 2 diodes (1N4148) are welded to front !!
- Why did you solder the 20 MHz quartz ?
Synthex wrote:2 diodes (1N4148) are in reverse (the 2 components between the keyboard and icsp terminals).
Synthex wrote:2 diodes (1N4148) are in reverse (the 2 components between the keyboard and icsp terminals).
jeffbeckib wrote:Are you saying that they had to go in a certain way? I didn't realize that, I just assumed they didn't have polarity
jeffbeckib wrote:could they have been in backwards and still have worked for a short period of time?
This MD did work perfect for about 2 hours or so, until I replace the left button that was bad.
Synthex wrote:jeffbeckib wrote:could they have been in backwards and still have worked for a short period of time?
This MD did work perfect for about 2 hours or so, until I replace the left button that was bad.
Your keyboard can't work with this mistake ...
Synthex wrote:jeffbeckib wrote:could they have been in backwards and still have worked for a short period of time?
This MD did work perfect for about 2 hours or so, until I replace the left button that was bad.
Your keyboard can't work with this mistake ...
jeffbeckib wrote:So have I damaged this MD with my poor job of assembly?
Let me know what needs to be done to save it and let me know how much you need to repair it.
I'll make a paypal payment for your work.
Thanks again, I really appreciate all your help.
Leo Rizzo
Synthex wrote:jeffbeckib wrote:So have I damaged this MD with my poor job of assembly?
Let me know what needs to be done to save it and let me know how much you need to repair it.
I'll make a paypal payment for your work.
Thanks again, I really appreciate all your help.
Leo Rizzo
I will try to repair it tomorrow.
Thanks.
Synthex
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