Distance between mounting holes is 2 15/16". Looks like one time use plastic rivets. Just looked at a close up pic of the 8650 blocks. That's weird. Never seen those before.
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@tfm3 $20 works. Sent you $ via paypal. Thank you for the effort. Distance looks dead on by my measurement. I'll add the postage when you tell me. The spring clip terminals length from Amazon/ebay are about 1/16" - 1/8" too short. Your terminals will be my temporary solution until I build a mount with 5-way binding posts. The stopper levers on the 8650 are easily broken - I know I've broken two of them already. As I mentioned elsewhere, I cannot believe that Sony used those speaker terminals on the TA-8650. Almost unforgiveable. Sincerely, Don
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Pretty crazy to go that unconventional with such a critical component at that price. I've done that 5-way post mod a bunch of times. Scroll saw works great for the plate. Gotta be real careful with the back plane clearance to the pcb. Did you already shoot me the address?
@Citizen124032 Sorry for the confusion. My unit is TA-8650. I am on this thread to obtain the TA-5650 speaker terminal blocks from @tfm3 to replace the ridiculous speaker terminals on the 8650. The spring-loaded ones from the 5650 appear to be an exact size fit. I thought that I would asks for the speaker relays too, except there are no relays in the 8650 (from the service manual block diagram). I do wonder if that is also a concern, no speaker protection.
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I'm def seeing a relay - prob protect circuit. Located behind power sw. Don't have time to follow up- I'll check the schematic later.
Be easier for me to pull and ship the tiny pcb that the relay sits on. That's going to take me a few days to get at. Might want to open yours up so I can send you a pic of mine to compare. Or listen closely when you power yours up. I could hear it kick in clearly behind the front left. On another note, you may find the spkr blocks suitable without the 5-way post mod. I had 12 gauge stranded Belden spkr wire in them that seated just fine.
Fair enough, the 8650 has no relay indeed, only thermal protection (kicks in at yellow circle).
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@tfm3 I thought about that regarding the terminal block substitutions. That's why I want to try the substitution of those from the 5650 first.
@Citizen124032 I figured that maybe Sony performed some sort of protection some other way.
One thing that happens with the 8650 is a large volume surge upon power up and power down (with volume control all the way down). Right now this appears to be the only issue with this unit. I have to do some research on this.
@Citizen124032 I figured that maybe Sony performed some sort of protection some other way.
One thing that happens with the 8650 is a large volume surge upon power up and power down (with volume control all the way down). Right now this appears to be the only issue with this unit. I have to do some research on this.
Sort of statement, as this thermal protection prooves another confusing 'solution'.
My guess that D704 was part of it is wrong. It's more involved with muting in some way when overstressed.
Again yellowed the thermal protection parts, a nice evening spend to study upon.
And even more something I noticed: those protection circuits are useful when the amp is running. But very questional how it operates during startup and shut down. Hence maybe this 'large volume surge'.
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I found a partial solution for volume surge during power on/off. I turned the speakers switch to OFF, then powered on, then turn speakers switch to A or B. No surge. Then again when done listening, turn speakers switch to OFF and then power off. No surge. (BTW, volume control always at lowest for off/on not that it matters.)
Packing up 5 shipments tomorrow for Saturday dispatch, Don. Let me know if you want the terminal blocks to go with that limited window. Need your address and Paypal info. This has turned into over 50 different messages on 3 platforms. Trying to keep it sorted out.
Packing up 5 shipments tomorrow for Saturday dispatch, Don. Let me know if you want the terminal blocks to go with that limited window. Need your address and Paypal info. This has turned into over 50 different messages on 3 platforms. Trying to keep it sorted out.
Sorry for the confusion, don. We already have Paypal links. Just need your address. tfmthree@gmail.com