Finished speedball, now not working, no LEDS lighting

ericoto · 2773

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Offline ericoto

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Reply #15 on: January 09, 2016, 09:40:28 AM
Alright, replaced batteries in multimeter, seems to be working better, now have LED's  one side of large board, nothing else. Voltages readings now
1 0
2 210
3 0
4 201
5 0
6 0
7 98
8
9 70
10 0
11 0
12 0
13 210
14 0
15 218
16 0
17
18 92
19 90
20 0
21 228
22 0

Thanks, sorry about crappy measurements



Offline Paul Birkeland

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Reply #16 on: January 09, 2016, 09:53:40 AM
7 and 9 will not get anywhere near 70-100V if terminals 1 and 5 are actually 0V.  Do the LED's on the 9 pin socket light up?  They will also not light up if terminals 1 and 2 are 0V. 

T2 and T3 will also not differ by 9V, as they are connected by a piece of wire. 

I would start by focusing on terminals 1-5.  Their proper functionality will allow the bigger speedball PCB to work properly.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline ericoto

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Reply #17 on: January 09, 2016, 10:33:57 AM
 The voltages at t2 and t4 are the same, that was typo 210V each, sorry. I still get nothing out of T1 and T5, and when I check the voltages on the octal base 1 and 4 I get the same. I have rechecked all connections on terminal 1-5 with no issues. The leds  the 9 pin do not light. One side of the large boards seems to be working with LEds on, the other side gets B voltage, but still no leds heat sink cold.



Offline Paul Birkeland

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Reply #18 on: January 09, 2016, 10:57:41 AM
Ok, 0V on T1 and T5 and no LED's tends to indicate that you need to resolder the center leg of each MJE350.

-PB

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man