8mm Forum: 16mm Bauer / Rank Aldis fixing

This is topic 16mm Bauer / Rank Aldis fixing in forum 16mm Forum at 8mm Forum.

To visit this topic, use this URL:
https://8mmforum.film-tech.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=5;t=000525

Posted by Stian Soereboe (Member # 1890) on January 14, 2010, 01:48 PM:

Hi, i am new to this forum. I hope to gain and share knowledge about the film hobby and so on.

About the Bauer, Rank Aldis 16mm projectors wich i think is similar to each other yes? I need help with an issue that came after i did the classic mistake of disassembling a plug without taking notes.

* The amplifier board have a transformator located just underneath. And there is 2 wires from that connecting
to the amp namely plug "J" and they was taken apart from the plug´s housing.

Can someone tell me how they were supposed to stay?
If they are likewise, or need to be + or -

I tried serching for a picture showing the path from the
transformator to the amp board but didnt find..

Posted by Josef Grassmann (Member # 378) on January 15, 2010, 05:18 AM:

As there exist more than 16 different versions of amp, you should state P6,or P7 or P8 and type and Serial-no.
It would be even better if you could state Bauer-No. of amp.
There is a label on PC-board with Bauer part-no. on it (10 digits), e.g. 8 698 075 098.

Josef

Posted by Kevin Faulkner (Member # 6) on January 15, 2010, 07:31 AM:

If the wires come stright from the transformer it wont make any differance which way they go on the amp board as it will be AC voltage from the transformer with rectification on the amp board itself. Just pop them back into the plug and all should be good.

Kev.

[ January 15, 2010, 06:52 PM: Message edited by: Kevin Faulkner ]

Posted by Stian Soereboe (Member # 1890) on January 16, 2010, 04:38 AM:

Yes thanks! I was unsure how it works out.

Posted by Kevin Faulkner (Member # 6) on January 16, 2010, 08:56 AM:

Let us know all was ok [Smile]

Kev.

Posted by Stewart John Boyle (Member # 1785) on January 16, 2010, 01:53 PM:

Great reply Kev [Smile]

Stewart

Posted by Stian Soereboe (Member # 1890) on January 16, 2010, 06:51 PM:

I think it will be ok Kevin [Smile]

Btw its a Rank Aldis Automatic.
The machine was almost wet of oils probably because its been
not kept upright (the small oil container) or wrong kind of lubrication?
So i had to take it apart, and while that mentioned plug was almost off i had to disassemble it from its housing for a fix. And so it happend. Im not a good electrician in depth on how thing works in circuitry, (thanks again) but know how to work these mechanics so it will be good in the end [Big Grin]

Posted by Josef Grassmann (Member # 378) on January 17, 2010, 09:39 AM:

It seems you got a earlier modell from ca. 1970 with 15 Watt / 8 Ohm amplifier. Take care not to connect your projector to a 4 Ohm speakerbox. It might destroy germanium power transistotrs.

On this amp two wires in question are related to a big choke (looks like smaller transformer).
From real transformer via rectifier + and - DC voltage (2 wires) is supplied to amp. Those wires must´t be exchanged!

The open tank used to be filled with a special oil. Later BAUER recognised that too much oil is pumped (by up/down of felt strip)
to cam and spread all over projector within short time.
Next step they introduced the special white grease to top up tank.
Do not use oil in tank again.

Posted by Stian Soereboe (Member # 1890) on January 17, 2010, 12:45 PM:

The amp board is number: 8 698 370 124
Mainboard is: P 6/2-L Lichtton Wiedergabe 8 6983 70 114
These are original setup combinations?

When i look at the amp pcb again there is no "J" sign as in the plug, coming from the small transformer.
Abit confusing. So.. I must see if that one will be stay open until the end.

Josef, can i damage it if i put the wrong wire on the mentioned plug? Is it AC going both ways right?

On the main axle i´ve used white grease (filled the 2 holes),
also same in front of the axle. and the container above i did not do anything yet [Smile]

Posted by Kevin Faulkner (Member # 6) on January 17, 2010, 04:59 PM:

Stian, As I said before providing the 2 wires come straight from the transformer it will be AC voltage. This means that it doesn't matter which way round the wires go to the amp board..

Kev.

Posted by Stian Soereboe (Member # 1890) on January 18, 2010, 12:02 PM:

Yes.. hope i made you understand about it,

quote:
From real transformer via rectifier + and - DC voltage (2 wires) is supplied to amp. Those wires must´t be exchanged!

That is the mains transformer, right?
Sorry if i make a mess of this. I will go for it now as you said in the first place. And i´ll follow the lubrication advice Josef.

Thanks for your help ppl!

> UPDATE: It works well [Big Grin]

> And also the new oil this is almost only the sound of air!!

[ January 18, 2010, 01:44 PM: Message edited by: Stian Soereboe ]

Posted by Kevin Faulkner (Member # 6) on January 18, 2010, 05:09 PM:

Have faith my friend [Smile]

Glad its sorted. Kev.

Posted by Josef Grassmann (Member # 378) on January 19, 2010, 05:35 PM:

...370 124 is transformer + rectifier board, with 2 fuses.
There are 2 wires from rectifier GL2, 55 volts DC, these wires must´t be exchanged!
....370 114 is amp-board produced from 1971, 20 watts but still 8 Ohms.
If the 2 wires (white?) in question lead from choke via plug to amp-board, than it does´t matter which way you connect the wires. The choke is smaller than mains-transformer and it has 2 wires, only.
The choke is needed to improve quality of DC current. There is no AC voltage at choke. But here you can put connectors into plug as you like it.

UBB.classic^TM 6.3.1.2