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Post by Ron Rich on Apr 21, 2021 15:20:53 GMT
Is there any grease on the motor to magazine gears ? There should be a slight coating of a graphite based grease--also, motor gearbox grease should be checked--changed if necessary. Ron Rich
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TCW
Full Member
Indianapolis, Indiana USA
Posts: 222
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Post by TCW on Apr 21, 2021 16:00:42 GMT
Looks like it should get a common.  |
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Post by jukenorman on Apr 21, 2021 16:33:10 GMT
If it's only reading B sides, check the contact disc and the A-B snap switches.
To return to it selecting A and B sides, there's not a lot left. The reset button or the credit switch might be opening? With credit, the reset button should be seeing ground. If you then push the reset button, only one side should now see ground. You could link from that non-ground contact of the reset button to ground and try it. That would check out a problem with the credit switch or reset button opening somehow.
That only then leaves the SCR or a poor connection on the SCR (S11 SCR). I've never come across SCRs reacting to interference but I suppose it might be possible? It might also be worth checking some of the components around S11 to make sure they are OK, particularly R1?
I'm sure you will keep us updated, this is quite an interesting fault!
Norman.
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TCW
Full Member
Indianapolis, Indiana USA
Posts: 222
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Post by TCW on Apr 21, 2021 16:47:47 GMT
Very strange... I traced the green wire from the Read Out Carriage Contact Assembly for the A side to the A-B Switches. It stopped there. I noticed the Linkage Gripper Dog Assembly was hardly moving and that it never released the A-B Switch arm. For some reason it was really high on the arm. Likely the caused from or the cause of the magazine motor issues. Anyway I simply pushed it down and it read the A side selected. I am going back now to look at the Alternating Dog to see if the poor fella is OK.
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Post by Ron Rich on Apr 21, 2021 16:52:19 GMT
That "poor fella" NEEDS to be greased !!! Ron Rich
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TCW
Full Member
Indianapolis, Indiana USA
Posts: 222
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Post by TCW on Apr 21, 2021 17:31:35 GMT
Norman, Ron Rich
The Dog jammed again and tripped the breaker. I wiped it and the Drive Gear dry of grease and metal flakes applied new graphite grease. Its operating OK for now. I should look at getting a new Odd-Even Alternating Dog (Part Number 31317) and possibly a new/used Drive Gear (Part Number 43313). Looks like I will need some donor Rock-Ola parts.
It is now playing side A's with out the side B tagging along. Seems like replacing the caps did it after all.
Tom
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TCW
Full Member
Indianapolis, Indiana USA
Posts: 222
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Post by TCW on Apr 21, 2021 21:45:09 GMT
If I play a title that is anywhere near the the dog transition it catches and trips. So it looks like an Odd-Even Alternating Dog and a Drive Gear is a must.
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TCW
Full Member
Indianapolis, Indiana USA
Posts: 222
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Post by TCW on Apr 23, 2021 1:07:58 GMT
Any ideas on the proper size of a part number ST-9249 "E" Ring to hold this dog on with? If I measuring the shaft properly it 5/32". So that should get me in the ballpark. The smallest I found at Lowes was 5/32 and the "E" Ring is few thousandths wider than the dog when installed so no good. I have to go with 1/8" I was looking for and order it and wait. I hope that gets it because a modern "E" Ring is so much wider than the old style (see bottom) used here.  Old Style  |
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Post by Ron Rich on Apr 23, 2021 12:17:56 GMT
You have two different items there-- Look at your parts catalog, and determine which one you need ! You also have incorrectly installed the clip in the upper photo. If you had complied with the request in our user introductions post, I would tell you where to get what you need. Ron Rich
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TCW
Full Member
Indianapolis, Indiana USA
Posts: 222
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Post by TCW on Apr 23, 2021 13:52:29 GMT
I am definitely seeking information Part Number ST-9249 "E" Ring. The above clip (5/32") is to thick (0.025") to engage the slot provided correctly. The 1/8" clip I have ordered is 0.015" thick and will seat properly when installed.
By the way a few minutes after I originally logged in I updated by profile to show I live in Indianapolis, IN but it doesn't show up in my post profile. I will have to have a look at the FAQ to see what's up with that.
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Post by Ron Rich on Apr 23, 2021 13:58:12 GMT
Tom,
If you are in the USA, try your local ACE, or True Value store--- may have it in stock ? Ron Rich
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TCW
Full Member
Indianapolis, Indiana USA
Posts: 222
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Post by TCW on Apr 23, 2021 14:18:44 GMT
Great minds think alike... but Ace only went down to 3/16" size. While typing this I had an idea to look at an old "Dorman Maintenance Hardware Kit" (I think I bought it at AutoZone) I have in one of my tool box drawers. Would you believe it has both 1/8" and 3/16" "E" clip sizes. Look like I'm reassembling this today!
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Post by Ron Rich on Apr 23, 2021 16:51:09 GMT
Tom,
If you are using the upper spring steel "E ring", not the lower C clip, I would suggest a very thin washer between it and the dog-if at all possible. Be sure it's correctly installed on the shaft-- the one in the above photo is not ! Ron Rich
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TCW
Full Member
Indianapolis, Indiana USA
Posts: 222
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Post by TCW on Apr 23, 2021 18:45:46 GMT
Done, works as it should (so far)! So though I have not replaced any caps in the amp so far, I would love to reduce the hum after its done playing a record and is just sitting there supposedly muted. The Amp is a 48350-A. It would be great to develop a critical list of caps to replace rather than just replacing everything on the Capacitor Board 49122-1A
Any one have any thoughts about this? Also why does mf (microfarads) have so many interchangeable acronyms (MuF, uF, mfd, MFD, MF or UF, WTF)? C1 L&R .027 mf 250V 48949 C2 L&R 150 pf Ceramic Disc 45789 C3 L&R 4.7 mf 35V 50647 C4 L&R .015 mf 250V 48947 C5 L&R .1 mf 250V 47421 C6 L&R .1 mf 250V 47421 C7 L&R 10 mf 25V 50646 C8 L&R 150 pf Ceramic Disc 45789 C9 L&R .47 mf 100V 48951 C10 .22 mf 100V 48941 C11 220 mf 10V 49271 C12 L .1 mf 250V 47421 C13 R .1 mf 250V 47421 C14 L .015 mf 63V 48947 C15 R .015 mf 63V 48947 C16 L .015 mf 63V 48947 G17 L .015 mf 63V 48947 C18 R .015 mf 63V 48947 C19 R .015 mf 63V 48947 C20 L 150 pf 45789 C21 R 150 pf 45789 C22 L 2200 pf 63V 49286 C23 L 6800 pf 63V 49287 C24 R 6800 pf 63V 49287 C25 R 2200 pf 63V 49286 C26 L&R.047 mf 250V 47422 C27 L&R 10 mf 75V 49279 C28 L&R 22 mf 75V 49278 C29 L&R 100 mf 70V 49285 C30 L&R 150 pf Ceramic Disc 45789 C31 220 mf 63V 48942 C32 47 mf 6.3V . 49414 C33 .047 mf 250V 47422 C34 160 mf 64V 44892 C35 25 mf 25V 49601 C36 25 mf 25V 49601 C37 160 mf 64V 44892 C38 R 100 mf 70V 49285 C39 L 1500 mf 60V 49142 C40 L 100 mf 70V 49285 C41 R 1500 mf 60V 49142 C42 .033 mf 400V 49417 C43 .033 mf 400V 49417 C44 2000 mf 75V 48928 C45 20 mf 16V 48038 C46 L & R 470 pf 33762 C47 L & R 2200 pf 30578 C48 L & R 33ยท0 pf Ceramic Disc 50644 C49 L .0022 mf Ceramic Disc 50104 C50 R .0022 mf Ceramic Disc 50104 C51 .0022 mf Ceramic Disc 50104 C52 .0022 mf Ceramic Disc 50104 C53 10 mf 63V 50105  |
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