Internal Part's Guide for Model A0J-1201 fan

A "gearbox oscillator" is not a commonly used term in the context of vehicles or machinery. It's possible that it may refer to a component within a gearbox that is responsible for oscillating or vibrating, but without more information it is difficult to provide a specific answer. If you could provide more information about the make and model of the equipment this gearbox is found in, I may be able to give you more information.

Can't find it for this model but the guide below is for an oscillating windchaser fan and page 6 describes the controls. I think it should be helpful.

https://www.manualslib.com/manual/1546147/Windchaser-Oscillating-Windcolumn-Fan-Wgcf1.html?page=6#manual

bad or binding gear or damaged bracket with the oscillating mechanism

Hello There, blades oscillating are usually controlled by the motor. When the motor is rolling then the fan not oscillating is usually a minor problem. Usually the blades are connected to the motor using a rod which is directly connected to the blades.
If the oscillator assembly is faulty this could need replacement of a part. And this would require expert help. Which part exactly is broken? How well can you handle mechanical assembly parts? i could try to get you an assembly guide to help determine which part is faulty exactly but i need to know the above.
Hoping to hear from you soonest.
Thank you for visiting FixYa.

Buy a new fan or do without the oscillation untIl it breaks worse, thenndiscard or pay a lot to have a new part made. Lasko will nOt and doesn't stock the replacement Teflon partial gear that wears out. Planned obsolescence!!! Buy a Honeywell or more reputable fan with a better warranty Hint: they don't exist anymore!! Caveat Emptor!!!!! THERE ARE NO MORE BUSINESS ETHICS IN AMERICA!!!!!!

Unfortunately, no - the manufacturer does not supply replacement parts. It is a throw-away item.

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The oscillating bracket has broken

12,000-BTU Portable Air Conditioner with Manual ... 3135 30-Inch Oscillating Industrial-Grade Pedestal Fan ~ Lasko ... 42.62 : Soleus Air FCM-30 12-Inch Convertible Stand/Table Fan ...

go to this link, hope you might find something useful.
http://www.hudsonscustommachining.com/FAQs.doc
or you can go to this URL http://www.vintagefans.com/contact.htm and post your question there.

The definition corresponding to this error message is this: "The print carrier stopped before all of the data was used." To resolve this issue, please do the following:

1. Power the printer off.
2. Remove all cables from the back of the printer.
3. Reinsert the power cord.
4. Switch the printer back on.
5. Check the operator panel to see if the 1201 error message is displayed.
6. If the error message returns, the printer could be defective. Contact the printer company if within warranty they will replace the printer.