Apple Scanner Carriage Gear Replacement

[RolandJuno]

If you have an original 4-bit Apple Scanner (and possibly the 8-bit and original Color OneScanner) that won't move the carriage, the large black plastic gear inside might have broken teeth. In my unit, this gear has become soft and sticky which makes it hard to turn on the spindle. This caused the meshing brass gear to shear off the teeth on the black gear.

I was able to model a new 3D printed gear that has brought my scanner back to working condition. The 144 teeth are extremely fine and I had doubts my FDM printer would work, but I tried a 0.2 nozzle and 0.1 layer height on a Bambu P1S and got reasonably good results.

The only issue I've noticed is it makes an oscillating sound now when the scanner moves at high speed. If I had to guess my printer didn't print the gear square?

Hope this helps you repair your scanner.

https://www.printables.com/model/1625890-apple-scanner-carriage-gear

 

[joeventura]

I just acquired an Apple Scanner and an Apple Scanner One,

I believe one is B&W and one color.


https://en.wikipedia.org/wiki/Apple_OneScanner




After replacing the cracked gears, the color unit comes on, the carriage moves to home and the scanner bulb lights then goes off.
Same on the B&W scanner except the light never comes on, I replaced the bulb and checked all the fuses.

Sort of stumped.

 

[RolandJuno]

After replacing the cracked gears, the color unit comes on, the carriage moves to home and the scanner bulb lights then goes off.
Same on the B&W scanner except the light never comes on, I replaced the bulb and checked all the fuses.

The light on/off and movement sound like it initializing. Have you tried scanning anything? Not sure about the bulb in the B&W scanner. What did you replace it with?

 

[joeventura]

These bulbs:

https://www.amazon.com/dp/B0CZ33MNGT?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1

 

[RolandJuno]

There's a thread on 68KMLA with some details about the bulb that might be helpful. The original is very green. Maybe the driver/ballast for the bulb is bad?

Original Apple Scanner Refurbishment Guide

I have never really seen any thread describe the process of refurbishing (heck, even using) the original 8-bit Apple Scanner. Apparently they are pretty rare or uncommon? This thread aims to change that. Pictured below is my original Apple Scanner in its yellowed, beat up, and dirty glory...

68kmla.org

Have you tried scanning anything with the color unit?

 

[joeventura]

all issues are resolved now, two scanners have different initialization processes , the original Apple scanner, which is known as the 4 bit scanner flashes its bulb at the end of the initialization, the Apple one scanner, which is the 8-bit scanner, which does 256 shades of gray does not do the bulb initialization, unless you press the button and then the bulb comes on. Neither are color it turns out.