Awesomeaudio; You might want to hit the sticky thread for the PIONEER TUNING FORK series. download them all and read up on capacitors and how they list parameters for them (ie: CEA and CEANL for example). This is directly related to what capacitors are required each place and how and why Mark lists a particular series of capacitor (Usually Nichicon's with a smattering of panasonic's).
Same thing with Transistors. Pin basing between old original and new replacements may change. You'll need to download all the Datasheets for the new ones and compare with the basing of the old ones. For instance an original is set up as an EBC and the new one is an ECB. You will need to swap the B&C pins (turn the transistor 120* and bend the legs some so it'll work. Another instance is the ECB to BCE. Flip the new one 180*. You'll need to know this stuff for every transistor you replace.
You won't be replacing all of the transistors, just bad ones, and problem children (known to cause trouble) as a pre-emptive strike. 2sa725, 2sa726, 2sc1451's are the 3 biggest offenders.
One more thing. On the parts lists for each board in the Service Manual, Each transistor will have a primary transistor and 1 or 2 substitutes listed. The unit may have any of the 2 or 3 at that position. So if you are looking for a 2sa726 and a 2sa763 is in the spot, it's ok. The 763 isn't considered to be a problem child (at least I've never heard it being one).
But replace any 2sa725, 2sa726 and 2sc1451's you find in it, no matter where it is. It'll eventually breakdown and get noisy. It's not an if, it's a when with these 3.
Take it slow and easy. Doing it once and taking 2-3 weeks is easier and CHEAPER than twice @ 3 times the time and $$. Don't get ahead of Mark, he's DAMN GOOD, but like the rest of us mere mortals, he can't read minds or anticipate what you are going to do. Don't work tired, and leave the Barley Malt for AFTER you get done for the day. It makes for BIG Mistakes. And that is costly, both in time and $$.
Have fun, and git'er done!
Larry
Same thing with Transistors. Pin basing between old original and new replacements may change. You'll need to download all the Datasheets for the new ones and compare with the basing of the old ones. For instance an original is set up as an EBC and the new one is an ECB. You will need to swap the B&C pins (turn the transistor 120* and bend the legs some so it'll work. Another instance is the ECB to BCE. Flip the new one 180*. You'll need to know this stuff for every transistor you replace.
You won't be replacing all of the transistors, just bad ones, and problem children (known to cause trouble) as a pre-emptive strike. 2sa725, 2sa726, 2sc1451's are the 3 biggest offenders.
One more thing. On the parts lists for each board in the Service Manual, Each transistor will have a primary transistor and 1 or 2 substitutes listed. The unit may have any of the 2 or 3 at that position. So if you are looking for a 2sa726 and a 2sa763 is in the spot, it's ok. The 763 isn't considered to be a problem child (at least I've never heard it being one).
But replace any 2sa725, 2sa726 and 2sc1451's you find in it, no matter where it is. It'll eventually breakdown and get noisy. It's not an if, it's a when with these 3.
Take it slow and easy. Doing it once and taking 2-3 weeks is easier and CHEAPER than twice @ 3 times the time and $$. Don't get ahead of Mark, he's DAMN GOOD, but like the rest of us mere mortals, he can't read minds or anticipate what you are going to do. Don't work tired, and leave the Barley Malt for AFTER you get done for the day. It makes for BIG Mistakes. And that is costly, both in time and $$.
Have fun, and git'er done!
Larry
