ieatmumble

Hello, i have to leave town for a while but when i will be back i will start rechecking everything, eventually i'll start removing parts. The period is about two weeks..just like the first time..maybe everything will repair itself :D Thanks a lot, Dan.

It was like that during the period in which it worked and after, until i cleaned it up a bit two days ago. I noticed it there but i didn't think it was a problem since it was silicon-based.

Ok..so i retested the values: Step I (power supply not connected): Step II (power on): as you can see on step II the voltage on the bottom right pin already started increasing (it's not a difference between J2 and J20 ground). Eventually after 30 minutes or so it was going around 0,7V. The voltage in the orange dots is the voltage that i measure on the bridge rectifier's output (+) when using the ground on J2 or J20 (or J4/J6/J7, etc) so the bridge rectifier "+" output is connected to the 7809 input. Also the resistance between those points is 0,5 Ohms. The same resistance between the 12V pins and other ground pins. The thermal paste that i use is bought from an electronic parts shop and it's silicon based. I believe it's either this one or this one so i don't think that's the problem although i have to admit, the paste was touching all 3 legs of the 7809 voltage regulator (cleaned most of it now with some toothpicks and some cotton wool). As i said before..the funny thing is that the voltages were great two weeks before. Thanks a lot for all the help and making me feel there's still a chance to hear it someday :D, Dan.

Hello, sorry for the late reply. First of all i'm planning to use 6582A SIDs so i have no header in JBP. So..i edited the image in the build guide to illustrate my measurements (all measurements in this image were made with the black lead on the ground pin at the bottom near C4) : green is 0V orange is 0,39 to 0,47 (it increased in about 20 minutes but all the orange values were the same at a given time. i took another measurement after about half an hour and it was 0,6V) Regarding the bridge, i made 2 measurements. One with the black lead in the ground point near C4, the other with the black lead on the output (-) pin marked in the picture in the post above. Here are the values: A thing that i find weird is that after 15 minutes of measurements i removed the power supply and now after 20 minutes i still get the orange values with the switch button in either of the two positions (by this i mean with the switch on and off). Another thing that i find worrying is that when measuring the voltage of the power supply, i get 12,7V. Thanks a lot for everything, Dan.

I removed the PIC and the ICs and i still get no readings except on the bridge rectifier from what i see. And i triple-checked the position of the ICs and the jumpers so i really don't think there was something wrong there. The PSU i use is a regulated 12VDC one indeed.

Hey everyone, so i finished soldering my sammichSID about two weeks ago and after soldering everything and the voltage tests (everything was perfect) i had to take a break from it. This might be important so i have to say that after the tests i installed the ICs and then left it alone for two weeks. Today i got some time so i set up everything and when i turn it on so i can upload the firmware..bam..nothing happens, not even the LCD or anything. So i check the voltages again and everything is dead in the water. I'm not very good at this but my instincts tell me there's something wrong with the bridge rectifier as i get these voltages: Any ideas? Should i check something else and if the bridge rectifier is broken can i replace it with a 1,5A/1000V peak one as i couldn't find an identical one on the local online shops i found these which seem to be pretty close. Thanks a lot for everything, Dan.

did the email say how many of the spots of the 9 batches are taken?

received mine yesterday. thanks a lot. :)