Marantz 6300 Auto Shutoff

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1audioaddict
Posts: 1
Joined: Fri Jun 04, 2021 4:14 pm

Marantz 6300 Auto Shutoff

Post by 1audioaddict »

My Marantz 6300 turntable works well accept the auto lift and shutoff at the end of a record is at best intermittent. It is operated by a shutter arm blocking the light beam between an LED and phototransistor. The point of blocking can be adjusted but the actual operation seems to also be dependent on the speed of the arm as it tracks the lead-out groove: too slow and the shutoff circuit does not trigger. Any suggestions?
Hugo
Posts: 187
Joined: Sun Feb 28, 2021 10:20 am

Re: Marantz 6300 Auto Shutoff

Post by Hugo »

It probably has a differentiator to detect the lead out grove. Perhaps there is also an adjustment for that? Schematics will help but without those I would imagine that replacing the electrolytes that maybe are used for timing could be due for replacement. This is an educated guess though, I have build a similar auto shut off for a manual Pioneer PL12D many years ago.
marchunter
Posts: 3
Joined: Sun Dec 26, 2021 11:47 am

Re: Marantz 6300 Auto Shutoff

Post by marchunter »

I’m having the same problem. I’ve recapped, replaced the photo sensor and adjusted the position of the blocking arm. Nothing has worked yet. The LED seems to be bright enough though I’ve read that replacing it solved some guys problems. Guess I’ll do that next.
marchunter
Posts: 3
Joined: Sun Dec 26, 2021 11:47 am

Re: Marantz 6300 Auto Shutoff

Post by marchunter »

Spoke to soon. Took getting it all back together and vowing to do more to get it to work. Put an album on and all the sudden at the end of the side viola, the table stopped and the arm lifted. Photocell was it.
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