Pioneer receiver replacement relay reference guide
edit: note -
the MY series relays have the PCB PIN coil connections in a line with the contact connections
the LY series relays have WIDER pcb pin coil connection spacing than the contact connections!!!
Thus unless special provisions are made for the wider coil connections, the MYx-02 and LYx-0 won't interchange
condensed version:
----------start of: There aren't any relays in these models----------
models:
SX-424, SX-525, SX-626
SX-434, SX-535, SX-636
SX-450, SX-550, xxxxxxx
!!!!!!!!!!, SX-580, SX-680
or looking at it sideways, SAME models:
SX-424, SX-434, SX-450, !!!!!!!!!!
SX-525, SX-535, SX-550, SX-580
SX-626, SX-636, xxxxxxx, SX-680
!!!!!!!!!! = no such model
xxxxxxx = has a pc board mounted relay
----------end of: There aren't any relays in these models----------
----------start of: these models use ONE chassis mounted protection relay:------------------
models:
SX-727 SX-737 xxxxxxx
SX-828 SX-838 SX-850
!!!!!!!!!! SX-939 SX-950
!!!!!!!!!! SX-1010
dpdt chassis mount using upper ears 24v 653-LY2F-DC24 MOUSER.COM stock level 51 @ $ 6.55
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
to mount this relay use standoffs (mouser.com parts numbers) 15mm M-F aluminum,
need two per side for 30mm: 728-FM2110-3005-A due to the ears being on TOP instead of on the bottom!!
stainless preferred standoff from mouser 15mm (need two per side): 728-FM2110-3005-SS
728-FM2110-3005-A is 4.5mm od 3mm x 0.5 thread 15mm male female aluminum 0.63 /100: 0.43
728-FM2110-3005-SS is 4.5mm od 3mm x 0.5 thread 15mm male female stainless steel 1.07 /100: 0.74
728-FM1262-3005-A is 4.5mm od 3mm x 0.5 thread 15mm female female aluminum 0.59 /100: 0.40
728-FM1262-3005-SS is 4.5mm od 3mm x 0.5 thread 15mm female female stainless steel 0.97 /100: 0.67
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
----------end of: these models use ONE chassis mounted protection relay:------------------
----------start of: these models use ONE PCB mount protection relay per unit:------------------
SX-650
SX-750
SA-7800
4pdt pcb mount 24v 653-MY4-02-DC24 MOUSER.COM stock level 82 @ $7.24
SX-1050
(the SX-1050 is a rare use of this particular relay,
but because it has a second chassis mount soft start relay
it is listed twice, once in this post, because only 3 models use it.)
4pdt pcb mount 48v 653-MY4-02-DC48 MOUSER.COM stock level 38 @ $8.11
----------end of: these models use ONE PCB mount protection relay per unit:------------------
--------- start of: these models have TWO relays each ---------------------------
---------------------------start of SX- x50 model series-------------------------------------------------
SX-1050 #1: asr-20 protect relay pcb mount 48 v 653-MY4-02-DC48 (pcb mount pins)
SX-1050 #2: asr-015 soft start relay chassis mounted 653-LY1F-DC48 (solder tabs)
why is this soft start relay different than the original? answer:
a visual chassis inspection reveals a dpdt and that WOULD be a type ly2f relay that uses 48v, which doesn't exist,
there IS a ly2f type relay available, BUT it's available ONLY in a 24v coil!!
luckily 24v is available on awr-104 board if you want to convert it to the 24v, using the 653-LY2F-DC24
otherwise the ly1f type is available in both 24v or 48v (why convert to 24v when a 48v is available?)
all 3 (653-LY1F-DC48, 653-LY1F-DC24, 653-LY2F-DC24) are stocked in 40+ quan under $7.00
SX-1250 #1: asr-10 protect relay pcb mount 24 v 653-MY4-02-DC24
SX-1250 #2: asr-015 soft start relay chassis mounted use 653-LY1F-DC48
why is this soft start relay different than the original? answer:
a visual chassis inspection reveals a dpdt and that WOULD be a type ly2f relay that uses 48v, which doesn't exist,
there IS a ly2f type relay available, BUT it's available ONLY in a 24v coil!!
luckily 24v is available on awr-107 board if you want to convert it to the 24v, using the 653-LY2F-DC24
otherwise the ly1f type is available in both 24v or 48v (why convert to 24v when a 48v is available?)
all 3 (653-LY1F-DC48, 653-LY1F-DC24, 653-LY2F-DC24) are stocked in 40+ quan under $7.00
------------------------------end of SX- x50 model series ----------------------------------------------
------------------------------start of SX- x80 model series ---------------------------------------------
start of convenient but confusing rehash:
SX-580 has no relay
SX-680 has no relay
SX-780 (for protect) 4pdt pcb mount 653-my4-02-dc48
SX-880 (for protect) 4pdt pcb mount 653-my4-02-dc48
SX-980 (for protect) DPDT pcb mount 653-my2-02-dc48
end of convenient but confusing rehash.
The sx-1080, SX-1280 & SX-1980 each use two relays, both are PC board mounted:
note #1:
these last three models (1080,1280,1980) use the same PCB mount soft start relay: 653-LY1-0-DC48 (hmmm: 4/20/16 edit: look for LY1F-DC48??)
this is the preferred relay if you can find it,
otherwise use a 653-ly1-0-dc24 and modify circuitry to run on 24v
this is possible on the sx-1080 and sx-1980 BUT NOT on the 1280,
because I suspect the 1280's 24v supply is weak.
note #2:
these last three models (1080,1280,1980) use the same PCB mount protect relay: 653-my2-02-dc48
thus:
x80 models that have two relays, one protect, one soft start:
SX-1080 #1 (for protect) DPDT pcb mount 653-my2-02-dc48
SX-1080 #2 (soft start) 653-LY1-0-DC48, (4/20/16 edit: LY1F-DC48??)
the pcb pattern will NOT support adapting in a 48v LY2 type relay.!!!
if 653-LY1-0-DC48 not available, there's 24v @ plenty of current available at AWR-152 C23 + for a 653-LY1-0-DC24,
remove AWM-120 R12 (2.2k 2w) and run a wire from the pad/hole connected to the relay through the chassis to AWR-152 C23 +
-------
SX-1280 #1 (for protect) DPDT pcb mount 653-my2-02-dc48
SX-1280 #2 (soft start) LY1-0-DC48 (4/20/16 edit: LY1F-DC48??) note there is NO mouser.com 653- prefix!! this is a rare relay) so use: 653-LY2-0-DC48
the pcb pattern WILL support an LY2 relay, and my board was factory drilled for it.
(it's better to use a 48v relay here, as the the 24v power supply is made by a "doubler",
and the 24v (653-ly1-0-dc24 & 653-ly2-0-dc24) relays MIGHT be too much of a load for the doubler circuit)
edit; you CAN use 24v relays by changing the sx-1280's AWR-157 R22, from 2.2k @2 Watts recalculates to 1.7k and 3+ watts
BUT you will be pulling 3.2 watts (instead of 1.6 watts ) from the power supply and throwing away 2.3 watts (instead of 0.8 watt) as heat in the new resistor.
-------
SX-1980 (for protect) DPDT pcb mount 653-my2-02-dc48
SX-1980 (soft start) 653-LY1-0-DC48 (4/20/16 edit: LY1F-DC48??)
if not available, there's 24v @ plenty of current available for a 653-LY1-0-DC24
the pcb pattern will NOT support adapting in a 48v LY2 type relay.
ALSO: WATCH YOUR HEIGHT - THE TOP OF THE RELAY IS VERY CLOSE TO THE BOTTOM COVER!!
------------------------------end of SX- x80 series ---------------------------------------------
--------- end of: these models have TWO relays each ---------------------------
Some of the protection relays in higher power units had factory mounted magnets on the outside case near the contacts
This was to suppress DC plasma arcs when interrupting 30v + DC faults.
I have removed the magnets from the old tape (good stuff - high quality and still lasts) and superglued them to the new cases.
Tape (most modern tape) generally gets gooey after a few years, unless specially formulated (and expensive - like kapton tape)
I NEVER use any tape for "permanent" fixes.
and as a LAST resort when having to replace a chassis mount relay that formerly had ears (The "F" in the part number),
with a more generally available relay WITHOUT ear type mounts, I use two angle brackets attached to the relay sides by superglue.
(the LYxF type relays listed in this post have the "ears" for the chassis mount.)
A "secret": superglue has lousy shear (twist) strength - so make SURE that the angle brackets are properly positioned,
otherwise when tightening down the second bracket - the misalignment will translate to shear force and POP OFF!! (lol)....
(LY1F-DC48??)
edit LY 4F removed, LY2F works.