nadude98
7MGTE Power!
the ztx-1056a is at Q6 & Q7 :scratch2:right and not Q5 & Q6
I am hoping pins 9 and 10 are the right place now!!!:yes:
the ztx-1056a is at Q6 & Q7 :scratch2:right and not Q5 & Q6
i dont get it??? wait go back to mark's post on the protect circuit. thats what im questioning and i used this pic as an example from the diode question that i hadI am hoping pins 9 and 10 are the right place now!!!:yes:
OK, like EchoWars says, the relay pull in current is weak (not a short buzzing, but the relay buzzing as it tries to pull in), so replace the 2sc1384 (ecb) with 512-KSD1616LBU (ecb), as the zetex will no longer available.
2sc1384 to-92 npn ecb 50v 1a 1w 85-240hfe 200mhz
Q10 - 512-KSD1616LBU to-92 ecb 50v 1a 0.75w 160mhz 135-600 $0.09 ea
C245 - 647-UPW1H010MDD 1uf/50v $0.10 ea
C243 - 647-UPW1H100MDD1TD 10uf/50v $0.09 ea
C244 - 647-UPW1H101MPD 100uf/35v $0.22 ea
Maybe you want to pursue other parts at the same time to pad out the order? (as in further postings etc...)
the 1616 is fine, and the 1616a has more voltage with slightly less gain.
no, it's a good question:
The power supplies are heat stressed, Pioneer runs them hot, and if the ventilation is restricted - they get way too hot, thus replacement is a good idea. The protection circuits Q5 & Q6 transistors are also stressed in different ways, and the modern ztx-1056a replacements are far more robust ( 6 AMPS pulse current, 3 amps continuous), and the extra diode put across pins 9 & 10 helps alleviate some of that stress too.
The amps are NOT run that "close to the edge". there are a few transistors that can inspire mistrust, but the dangers of a wholesale replacement causing damage are greater than the chances of eventual failure. I include MYSELF (not just "noobs") in the group that should think long and hard before doing a complete replacement of transistors in the 1010 amplifiers.
Just as an example, the EchoWars 1250 at the fest that he "did the works on" still had the original outputs - but I didn't ask about the rest of the transistors in the amp....
If it ain't broke - don't fix it.
mark this is the post i was questioning. now for Q6 & Q7 i have 4 new ztx-1056a transistors that i ordered from mouser a few months ago. should i use them???
change of subject,,, when i go to re clean all the switches, i have a whole can of de-oxit g5 gold. what can i use that for???? i have d5 and faderlube allready
there are a little over 1,500 ztx-1056a transistors avaliable at mouser for shipment. they are no longer being stocked