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 Post subject: Wulitzer 548 amp problems
PostPosted: Aug Mon 30, 2021 7:48 pm 
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Joined: Feb Fri 19, 2021 1:55 pm
Posts: 9
Hello everyone
I'm trying to repair a juke box amp 548, no schematic. Does anyone know how to jumper the amp so that it can be put on bench to power and troubleshoot.
Many thanks
Dale B


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 Post subject: Re: Wulitzer 548 amp problems
PostPosted: Aug Mon 30, 2021 8:46 pm 
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Joined: Mar Tue 03, 2009 11:12 pm
Posts: 2004
Location: Great Bend KS
Could you post model of jukebox? I'm not familiar with what amp goes in which juke yet! There are a couple of places on the 'net that sell service manuals for jukeboxes, well worth the money.


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 Post subject: Re: Wulitzer 548 amp problems
PostPosted: Aug Mon 30, 2021 8:55 pm 
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Joined: Jul Mon 08, 2013 2:48 pm
Posts: 793
The Wurlitzer 548 amp schematic can be found here:


http://4tubes.com/2-SCHEMATICS/Music-am ... er/548.jpg
http://4tubes.com/2-SCHEMATICS/Music-am ... r/548a.jpg
http://4tubes.com/2-SCHEMATICS/Music-am ... r/548b.jpg

Poor quality scans but better than nothing. Jumpering can be traced out from these schematics.
Power connector jumpering is shown in dotted lines at the bottom right of the schematic.
You'll aso need the level (volume) control panel with associated wiring/connector to complete the audio path.
And (maybe ?) some other jumpers to activate relays, etc...
Careful analysis of the wiring shematic will be needed.
I don't think an antique radio collectors forum is the right place for such requests, there are many specialized Juke Box collectors forums which have much more experience and expertise in this field with many helpful members ready to help you.


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 Post subject: Re: Wulitzer 548 amp problems
PostPosted: Aug Mon 30, 2021 9:07 pm 
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Joined: Feb Fri 19, 2021 1:55 pm
Posts: 9
thanks to all think I saw what I needed
again thanks
Dale B


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 Post subject: Re: Wulitzer 548 amp problems
PostPosted: Sep Wed 08, 2021 4:47 pm 
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Joined: May Wed 06, 2009 7:01 pm
Posts: 913
The Facebook group "Jukebox Library" is an excellent member site that freely shares Jukebox manuals.
https://www.facebook.com/groups/JukeboxLibrary

While open to anyone, they welcome you but then ask you for a picture of your jukebox to verify you really are a restorer or owner. Helped with my recent restoration of a Wurlitzer 530 amp (vacuum tubes - circa 1956)

-- Rich


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