Seeburg HSC1

Just picked-up a Seeburg HSC1...right off the bat it was obvious that someone had rigged this machine's Reversing relay (It was missing the latching part of the relay assembly) Also they had moved it higher away from its normal position. I also noticed a few wires on the mech that have been rigged and also noticed a couple of resistors 120 ohm 10W and a 560 ohm 2w paralleled which I don't see on the manual or schematic..plus a small microswitch added so as to be actuated by the pivoting elbow of the trip mechanism... So I said I will deal with that later and went ahead started cleaning it and worked on: Clutch done, recapped CCC1, and stepper done. Tested and; write-in and read-out working perfectly. ...the only malfunctioning after doing all these improvements was that it would not hold the "b" (right side) of the records (any selection ending on an odd number). Symptom: when I selected a RIGHT side selection it would start to bring the record up to about 70% of the travel and then cancel it and bring it back down into the tray. ..So I manualy held down the reversing relay and this would allow the mech to complete is cycle properly..The left side would work perfectly.
Here is my problem I borrowed the missing latch from my LPC1 and installed it on the HSC1 and adjusted according to manual..Now the problem is that it automatically cancels all selections "A" side as well as "B" sides...I wonder if anyone here is aware of this type of modification if there is one. The only reasoning that I can can think of is that perhaps the latch was taken out of the machine and probably sold it without it and someone else might have tried to make it work without it. I just don't know, the person whom I got it from has paperwork dating back to the 1970's and not of a clear mind any longer.

Hi Tonily,
I have thought long, and hard about how to answer this--"softly"--
If I were you, and had purchased the manual recently, I would "SCREAM bloody blue blazes" at the supplier,
as you have used the incorrect manual--
If you have an old, original copy, I guess it's sorta your fault, as you do not have the HSC-1 model. You have the HSC-1U model, which should be so noted on the ID tag. There is a supplement for the U models, in which it tells you about all of them thar, plus more, things you found to be "different".
If you have truly found all of the changes between the two models, it should work--you MAY need to remove the pin from the "spare wire" in the mech cable--I'm not sure-to make it work right.
I guess you should have asked first--??
Ron Rich

Hi Ron,
I didn't order manuals for this machine these came with the machine in the original factory envelope. This man even had the shipping tags, original warranty certificate and all tags. When I took off the carriage metal cover I noticed a few wires which showed signs of careless soldering...Furthermore the blue wire coming from the reset/clutch switches was cut and a piece of yellow wire attached to it leading to the cam switch....there was also a red wire which was added and ran outside of the harness that leads to the CCC to pin #2... I noticed pin #13 the spare wire was now being used to the reversing relay... there were to other wires which were cut and spliced with different color wires..Since I do not repair jukeboxes for a living and had never seen a HSC1 in person it was easy for me to assume that the juke had been rigged since there were obvious differences from the manual...Yesterday evening I spent some time figuring out the differences and took notes and was able to retrace what had been done and was able to get the machine working again. It doesn't sound very clean so am guessing that I'll have to do some recapping...By the way I also noticed that this machine has some kind of preamp attached to the carriage.. any tips on this?

Thanks and Have a happy day!

Hi Tonily,
The update pamphlet should have been included in the service manual package ?
Never have had any pre-amp problems--sorry, no tips on this--
Which model tuner is installed in that one--one with a rotary "selection" switch, or the one with the black line-up of push buttons across the tuner face, top ?
Which model
Ron Rich

Hi Ron,
It has the rotary dial. It also came with a remote rotary as well.

Tonily,
Yes--I know it has the dial--all "HSC's" did--what I'm asking about is the "selection switching". The one used to switch inputs--phono/ tuner /aux ++ ?
Ron Rich

One line of bottons above and perpendicular to the tuner display glass... Tape-Aux-Phono-etc-etc I believe the tuner/amp model ends with a number 3

You got lucky---you have the SB-300, system--far better then the SB-100, and SB-200's. (All SB-100's were re-called, re-worked with an added outboard final out put/heatsink section--this ain't too bad once done---)
Ron Rich

Hi,
Back again this time I got my hands on another HSC1, this one has the rotary input selector so I assume it is the SB100 model...One of the channels is much lower and a bit fuzzy, so I decided to recap the amp, and replace the transistors as well...I've try to find cross reference for the temperature compensating diodes which mount on the output 2n2147 TO3 transistors screw. but havent been able to find any info....Can you advice on this and perhaps elaborate more on the recall mentioned above regarding the addition of a heat sink for output?
Thanks.

Sorry to say--your "assumption" may be incorrect. Both the SB-1-- and the SB 200 used a rotary function selection switch--
You will either need to find the model number plate on it, or find the schematics for both models and follow them-----give me the Seeburg part number for the item(s) you want, and I MAY be able to come up with a cross-- Ron Rich

Hi Ron,
Thanks for the reply! I was basing my assumption in that I didn't see any 2n2147 on the SB200 schematic page. But these are present on the SB100 schematic page. And also on other similarities such as the output/input connections...This is what I have on the part number for the diodes....

ADC. PART NO: 4820 00377
MFG: RCA PART NO: 40428

Thanks!

Best I can do is Seeburg 318211--also the RCA numbers 40428, and SK 3506--Cathode is at the "mark" on the case--
HTH-- Ron Rich

Thanks Ron,

Can you think of any adverse/negative effect on the circuit performance due to the fact that the RCA 40428 is Germanium, and the SK3506 is Silicon?

I also noticed that in the sk3506 the Anode-2 (mt 2) lead is also present at its case. Am I correct to assume that this particular lead is not used for the intended application being that these are to be attached to the TO-3 cases. And lastly, would the GATE lead of the sk3506 connect to where the existing 40428 cathode connects?


On a separate note: While searching for information on the sk3506 I ended up with cross reference to NTE5642 at the NTE part search webpage . While there I decided to search the original RCA part # 40428 and the search returned a cross reference as 4822-130-40428 to NTE158 which is a germanium PNP triode transistor, also a TO-1(the RCA-40428 is also a TO-1 case). If it would work as a replacement, it would be alot easier as far as attaching it to the NTE121 case Vs. the SK3506 which is a TO-5 and would not fit on the existing straps.

Thanks!

Sorry--No answers for you here--I am not a design engineer--only thing I can add is that the "Replacement guide" says it's a germanium, "temperature control diode"--will a silicon work in it's place--the guide says so--never found it incorrect-yet ! Ron Rich