rockola 490 supersound

I have a electrical problem.i powered up my jukebox;it put the recrd on turntable;started playing.then I was smelling something burning.quick like. then it blew slo-blo fuse.it smelled like transformer fried.so to make long story short. I purchased another power dist. unit;power supply,but forgot how I took off ground wires.which order.so I installed 2nd unit. did same thing as firt one. now I have 3rd unit coming.and afraid to hook it up. so what may my problem be? I hace wiring schematic. operator manual. puzzled.

You have a short circuit--somewhere--not necessarily in the power supply.
You will need to trouble shoot the phonograph,and find/fix the short, BEFORE installing the new PS.
As for "order of the grounds--if you are talking about all of the single ground wires connected to the post, in the PS--it makes no difference. Ron Rich

thank you,Rich. I have wiring schematic. will try to troubleshoot it out. if not have to try to find someone to look at it.

Hi
Which fuse did it blow, maybe post a photos
Clones

it blew fuse on bottom of power supply.lighting and remote and volume control are beside it.theres a filter with german writing;mounts with a bolt inside towards the bottom,that smelled burnt.has 2 wires n each end with male and female connectors.

i took power supply out of jukebox. plugs it in.worked just fine.so i have external component problem.will put it back in;hook up one thing at a time;then see what will blow circuit. is this wise?

How do you know it "worked just fine" ?
What size fuse is it--did you replace it with a same type/size ?
The "lightning bolt" in the triangle is the international sign for "Danger --hi voltage"
What does the "German writing" say ?
Ron Rich

iput a5amp 250 volt slo-blo fuse in it.that filter problem was in my 1st power supply. i took cover off this 2nd. one;it didnt have that filter in it. i now have 3rd power supply coming from a working juke box. i know this soundsconfusin.before ether power supply would blow fuse within 2 minutes. i pulled the last power supply out of machine.plugged it in with no load for 5 minutes didnt blow the fuse. all the 4 voltage lights were lit.seems ok.so now would it be safe to install back in jukebox and hook up one plug at a time to find that bad circuit?

Hi
some of the Rockolas in particular for the European market were fitted with mains supply voltage filters inside the power supply and possibly on the lighting circuit. Previous Rockolas i have had with defective or leaking filters would cause a fuse to blow or fuse to trip in the house
Clones

mybe that's where my problem is. the 1st power supply ad german filter. funk-entstorfilter. made in w. Germany. can see one end of it got hot. so do you think this circuit is in the lighting? if so I ould hook everything up;try it then plug in lighting,to see if I blow circuit. is this feasible?

I don't consider that to be a safe way to do trouble shooting -
Ron Rich

i going to ship it out to get looked at. theres a place here in kansas that can test them. i thank you for all the help,Rich. sorry to be such a pain. i love my jukebox;gonna get it fixed. lonnie

Hi
I have bypassed the filters before but the safest way would be to replace the filters, it should be fairly obvious if you have a filter on the lighting circuit
Clones

Clones,
To the best of my knowledge, "spike arresting filters" are installed on any machine using a computer, to prevent incoming spikes from "messing up" the computer program. Since I don't have the schematic on this RO, I can't imagine why a "filter" would just be on the lamp circuit ? Also, as far as I know, all jukebox makers specified "with condenser" lamp starters be used, on all computerized jukeboxes. This is done to protect the computer from spikes. Ron Rich

Hi Ron
have seen it recently on a 477, one in the power supply and one on the lighting circuit, although it was well hidden. You also find them a lot on the German Wurlitzers and they seem to always cause problems, at this stage they are due a change
clones