harleyrider
Super Member
Just got he HE129-NDs today, EW are these the same layout as the US relays you used int he pic? And if so does it matter which direction it is mounted . I dont see any markings on these i got today .
Echowars hasn't posted on AK in the last year.He's gone MIA.Thanks! Minutes ago I bought this SPEC 2 that is in protection off the auction site. It also has a broken handle and possibly speaker connection issues. Any advice is much appreciated.View attachment 1162901
I hope all is well. Maybe he really is hiding in HondurasEchowars hasn't posted on AK in the last year.He's gone MIA.
So what is the most up-to-date replacement available for this relay, mouser PN# is you can. thanks. And installing pinout?There's a lot of possible causes, but I'm speaking about 'no' measurable bias current, or current that fluctuates from a normal value to something lower, and back again (or not).
The root of the problem is Pioneer's protection design, which is effective but horribly complex. The Spec-2 contains no less than eight (8!) relays, performing various functions ranging from a soft-start, to switching in an alternate set of resistors to change the current limiting curve when the amp is switched from 8 ohm to 4 ohm operation.
The relay I am speaking about at the moment interrupts the flow through the current mirror in the bias section of the main amp. The protection circuit of the amp does not allow bias current to flow until the last moment of operation. I'm not particularly crazy about the design, but it is what it is, and if you bypass the relay, you'll get nasty thumps as the protection circuit relinquishes control on power up.
What I have been finding with increasing frequency is that, once the protection has finished its power-up sequence, bias is unsteady, low, or non-existent. This will result in various levels of distortion in the affected channel - ranging from gritty highs and unbelievably flabby bass (think 'nearly unlistenable') to near total loss of signal.
The culprit is RL1 (as designated on the individual amp schematic and the foil pattern), or RL5 'a' and 'b', as designated on the large fold-out schematic. There is one on each driver board, and you can quickly see on the schematic that this relay is designed to interrupt the bias current. The stock Pioneer relay is, frankly, crap, and is likely the cause of a lot of crappy sounding Spec 2 amps.
Here is what the part looks like (circled in yellow):
Sadly, Glenn (EchoWars) has been MIA for about six and a half years now.So what is the most up-to-date replacement available for this relay, mouser PN# is you can. thanks. And installing pinout?
I am talking about RL1. can someone help with the right replacement and a markup of installing it as the pinout is going to be different for the replacement. and should RL2 be replaced also or is that ok?
D9 is this a good replacement? Mouser #: 934-HE3351A2400 and if so, is the installation like the picture of the other part in the beginning of this post.
No that's not my picture. That's a picture from earlier at the beginning of this post with a different part. I'm asking what is the new part number? And is the part I attached a link to the right one well that one work? And if so is that the same pin out as in the picture from earlier in the post many years ago with the other part?Is that your pic that you posted? Does/did it work? It's a SPST relay. Two NO contacts, two pins for the coil. Not much to do wrong there.
So all the pioneer help guys are gone now? I'm on the form because I need help.You are going to have to look at the datasheets and make the determination. Every part (relay or what have you) has a datasheet.
The part referenced by Matt above still exists. Why didn’t you buy that one?I just found two of these "US Relays part #SD1A24D" on eBay and went ahead and ordered them. I was just wondering if somebody could have crossed referenced something up to date but that's OK.
The part referenced by Matt above still exists. Why didn’t you buy that one?
Random parts on eBay is never a good idea.
I’ve used it many times. Pinout is in the service manual, and you have the picture showing the correct installation.