dead cartridge? Darn the Luck ! ! !


Old OM20 that I haven't touched in 20 years. Tried it direct thru my Onkyos phono pre. Nada.Then I tried an outboard NAD pre. Left only.
I swapped sides. Right only. Pre is OK.
I reseated the cartridge wires at the headshell, both sides, 4 pins.
Tested continuity from the cartridge wire through to the NAD input. All 4 pins good.
I know it's rare, but is there something I forgot? Seems I have a dead right side.
metropical
let right top bottom on the ortofon cartridges, re the pin locations, is not the same as US built and Japanese built cartridges.

It’s a real PITA some times, as we hook them up the same as other cartridges..and get what seems like a dead channel.

find a spec sheet for the om series and look at the pin out locations.

Or was it the color of the pins and their so called identification re the color? Yeah, I think that is the issue....

Basically, you might be using the two hots as a channel and then the other channel is using the two grounds. Your color identification of the terminals is correct, but....ortofon uses the colors differently.

nope. color and identification is fine. It is the orientation that is different. turned 90 degrees on the om series.

one channel is the the top two pins and the other channel is the two bottom pins. On the om series.

the 2m series is the same as the om series wiring, and only those two series are wired that way.

Which tells you a lot about the 2m series.

As a matter of fact, you can slip a 2m series out of it’s plastic case and slip it into a om series body. You can take a 2m black  cartridge body proper and put it in an om 5 plastic bit, and fit on a om 5-10-20-30-40 stylus. Not much point, though.
mine is color marked and I matched the config at the cart to the shell.You think I need to move wires to different pins then?
I can't find a wire diagram for my Philips AF 887 tt headshell. So I’m just guessing.
I managed to get both sides working, however they are out of phase.I know the speakers are wired right as I ref’d rcvr/tuner and TV.Here's a link to a photo of the shell if anyone has an idea which wire to flip, though I thought I tried all combos.
https://farm5.staticflickr.com/4886/31993170238_868623648e.jpg
It doesn’t matter which channel you switch the phasing on. Left or right, choose one only and enjoy.