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?
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.
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.
Showing 6 responses by metropical
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 |
this is way too old for warranty and it worked fine when last I used it ..... 20 year ago. I’ve tried every which way to flip phase. Nothing changes it. But I’m not sure which way the head shell is configured. I just assumed logically, left and right, but perhaps it’s crossed like the Ortofon.https://farm5.staticflickr.com/4861/30936942687_5989ca5d33.jpg Kind of thinking now that lack of use, aging, whatever has messed it up inside. Don’t think I’m dropping $50 for a test record. This is not my old 24 track Ampex 1200. I tested another source thru the pre, the pre is fine. it’s either me crossing wires or the cart failed with age. From Ortofon tech supp: "There are two possible reasons for channel missing or level differences: the incorrect position (rotation - in front view) of your cartridge in the tone arm. The other is a defect in the cartridge itself caused by aging, rotation of the armature or shunt(s) between the turns of one coil. " |
didja ever do something so embarrassing .............. I was on the phone with an audio bud, going thru everything.He asked "what input in the rvcr is the PP2 in?"Flash of light! I switched to another input and all is well.Though this Onkyo rcvr is only 10 yo, perhaps the RCAs on the back are hand wired rather than PCB mounts, or there is some element of the rcvr that human hands touched and flipped the phase on the one input.Doink! |