JYE Tech Forum

fixed! goodbye...

fixed!!! I exchanged Q1 = SS8550, Q2 (used 2N2222A) and L2 (used 1mH;800mA). uf... original parts were probably bad.. about destiny

I'm sorry, I still ask

in scheme is 1mH/1A, but 1A are too big (1mH / 1A Rdc (max) = 0,426 Ohm)


actually used 1mH / 0,28A? according to size..
is an important internal resistance or no?

exist replacement for Q1 8550 and Q2 9014? type BCxxx?
need buy spare parts.... pls help..

VGEN is ok with LCD...

thnx! I'll do testing all options...

exist replacement for Q1 8550 and Q2 9014? type BCxxx?
I can not find original type here..

I found possible bug..? VGEN = 0.0V.. I suppose processor no work correctly?.. but OS work, commands too.. Q1 and L2 are cold now, probably dead..... https://scontent-fra3-1.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/1462860_10205270060164914_6147329893173651917_n.jpg?oh=b40ac6001b74a8a59384c67c2f544b38&...

I do not understand this answer
I'm so sorry ..

Inspect all topics, but so far no solution even though people have the same problem ..

Q1 and L2 are so hot in 30sec. I'm afraid it will burn

sorry, i cant speak english very well...

I have problem..
+5V - OK
+3,3V - OK
AV+ - OK cca 5V
AV- not work > +0,7V, must be -5V

problem is Q1 and Q2???

OS work, display ok.. only no trace....