Wurlitzer 1400

[Mark]

I have not replaced any components yet. You are likely right about a capacitor.

But may be getting a start on trouble shooting.

I returned the amp to the console and plugged wires back in. (Using the dim bulb tester!)

The wire that caused the buzzing is the coin mechanism. Without that plugged into the amp, I have lights but nothing else. At least no buzzing now.

I am having trouble understanding the manual about all that happens when a coin is inserted. So will continue troubleshooting.

Currently, I cannot get anything to happen when a selection button is pressed.

[Ron Rich]

Hi Mark,
Are sure we are speaking of the same unit- ? Your "coin mechanism" should NOT plug into the amp !! You should not need the amp inside the cabinet to run that phono--and I strongly suggest you leave it out while "troubleshooting"--and until the amp is properly rebuilt- !
The amp, if I remember right, should have an input and an out-put connection. It MAY also have a volume control socket--nothing else !
Ron Rich

[Mark]

Thanks Ron.

The coin/trigger mechanism does have a wire that plugs into the amp. It apparently supplies power to trigger the acceptance of the coin(s) to trigger the play circuit. If I am reading the manual correctly, the coin mechanism feeds a relay to allow "play".

I can be reading this wrong because I am still struggling with understanding the whole process of all the triggers to activate the mechanics to load a record.

Would a photo help?

[jukeboxmarty]

Yes, on a Wurlitzer 1400 the coin register does indeed plug into the (Model 514) amplifier.

Edit: As well as the mechanism chassis, and selector.

[jukeboxmarty]

The 1400 uses a coin grinder setup with a motor to accumulate credits. It should be fairly easy to determine what's humming inside that unit. There is a coin return solenoid which stays energized when the unit has power. This is might causing the hum; they are very noisy sometimes.

[jukeboxmarty]

If the "key switch" in the coin register is not closed you will not have any established credits.

[Ron Rich]

Hi All,
Thanks for the correction-- my great memory "He-cupped" ! sorry ! Ron Rich

[Mark]

Unfortunately, the hum is from the amp. And the hum starts when I plug the coin register in.

When we got the jukebox, the coin register and the slug rejector were laying in the bottom. With various assortment of screws and hardware.

What is the likely cause of the hum?

Also, is there a way to set up without having to trigger from the coin mechanism? Maybe I don't need to have it plugged into the amp if there is a work around.

[Ron Rich]

Mark,

You are attempting very hard to cost yourself huge amounts of $$ ! If your coin unit causes "hum" in it's power-supply (the amp)it would indicate the coin unit has a direct short in it and is straining the amp's transformer. As I have already demonstrated, I don't know that model WurliTzer, but I would HOPE that there was a fuse designed to protect that transformer ( got the manual--schematics ?). If so, I would check that the fuses ( and ALL fuses), are the correct size and type prior to power up !

EDIT: Yes-- there are "ways" to work around the coin equipment-- I strongly suggest you build a two relay system, to emulate the actions of the coin unit. Ron Rich

[jukeboxmarty]

The coin counter may be one possibility, and are you sure the coin register plug was plugged in correctly? Sometimes the keyways have been broken off of the connector.

[Mark]

Not sure I am making progress or not.

I visually checked out the coin register. Between it and the slug rejector, I have a greater appreciation for the design and implementation of the simple function of getting the jukebox paid. Rube Goldberg would have been impressed.

I did pin to socket continuity between the connector and the socket on the amp. Then put the connector back in the amp and had no noise. (The only noise now seems to be the ballast)

Also, the selection light is lit.

I must have reset the coin register while I was inspecting it.

Unfortunately, when I make a selection nothing happens.

The manual has some info on trouble shooting and I will see if I can figure anything out later today.

[Mark]

Jun 25, 2020 16:08:32 GMT jukeboxmarty said:

The coin counter may be one possibility, and are you sure the coin register plug was plugged in correctly? Sometimes the keyways have been broken off of the connector.

Sorry, did not see this before my last post.

Yes, I believe the plug and socket are correct.  The keyway is intact and is aligned.  

[Mark]

Is there a way to get around the coin counter in trying to troubleshoot the rest of the problems I am having? Can I put a jumper, or jumpers, so that the amp reads selection all the time without having to build a 2 relay system?

There is lots that happens in the coin counter. Several pages of trouble shooting in the manual about all the potential problems. I appears I have a long way to go, and a shortcut to bypass the coin box would be helpful.

I am better with mechanical than electrical, so any help is appreciated.

[mb9513]

Mark, replacing the caps is a requirement, they were never intended to last almost 70 years. get a kit from a reputable supplier . You will get all the caps and a schematic. you can also have someone rebuild it for you. normally i ask 150.00 plus parts for a mono amp. so you will know what the financial cost is. I restored a 1400 and the areas of problem are: the keyboard, each key switch has 4 switches on it and are partially wired in series. so if you have a failure on say key 10 then 11-48 are out too. The tone arms. they are difficult to keep adjusted right. the jukebox MUST be level to get them to trak anywhere correctly. The cartridges. the cobra cartridge is unusual in that is uses a change in capacitance and pulls out the signal thru an oscillator and a detector like an FM radio signal. they used a silicone dampener that gets stiff if you use an old cartridge. i found on the 1400 i did that i had to check several cartridges to get 2 that sounded ok. Also there is a switch that swaps signal from one tone arm to the other. they go bad. on mine, someone had wired the carts together so that it dropped the input signal down requiring more volume and extra noise. 1st things 1st though, as Ron said do not plug a buzzing amp in most likely you have a bad filter capacitor and it can overload a transformer and they are made from unobtainium!

[Mark]

Thanks Mark,

I ordered caps today.

Evidently, it is a pain to get to all the caps. May take a while for me to finish.

Do you have a source for cartridges?