HP 9114 Repair Parts

[Dave Frederickson]

Here's some updated information on repair parts for 9114 floppy drives. First, thanks to Tony Duell for the schematics and repair procedure.
Replacement drives for a 9114A, 09114-69511, Sony OA-D32W-11, can be found in 9133, 9121D/S, and 9122D/S (S/N 2518A and below) disk drives. Drives for a 9114B, 09123-69101, Sony MP-F52W-50, can be found in 9153, 9123D, and 9122D/S (S/N 2614 and above) disk drives.
Battery - Powersonic PS-628 on Amazon, $10. Build up one edge with double-sided foam tape to keep it from rattling around.
MC68B09 CPU - Amazon, $9.
MC68B21P PIA - EBay, 2 for $4.
WD2793A WD Floppy Drive Controller - Ebay, $14. With HP part number!
5A pico fuse - Mouser 576-0251005.HAT1L
HP 1LB3-0003 HP-IL chip - Can be found on the I/O PCA of 2225A (yes, HP-IB) printers.

Dave

[Raymond Del Tondo]

Hi Dave,

many thanks for the combined info:-)

I currently have an A and a B drive.

The A drive had the (I think) typical problem of a nonfunctional disk case lift mechanism. It turned out to be a mechanical problem. One of the slide bolts on the right side wasn't sliding due to missing lube. You couldn't insert or eject a disk.

After applying some lube to the said part it worked fine again.

From the mechanical construction I assume this is one of the main reasons for drive mechanism failures, since this bolt doesn't have a real bearing but only a rivet holding it in place.

The B drive would work fine, if there wasn't the spindle motor which revs up when trying to access the disk. Since it looks like a direct drive motor (I may be wrong) , and the driver bolt in place, I don't know why the motor just hauls permanently instead of simply positioning the disk and stopping.

Any ideas?

[Dave Frederickson]

Hi Raymond,

Sorry, I'm not an expert when it comes to repairing the Sony drives. I was lucky to find a 9114A and am looking for a 9114B. In order to keep my collection working I acquired two 9122D drives. The one with the "A" type drives had already been used for spares. The "B" type drive yielded two good drives! When I find a 9114B I plan on trying to get one good "A" drive from the two bad ones.
In the mean time perhaps I can help you out.

Dave

[alexf]

We have tested and confirmed.
The HP9114B drive will also work with Sony Disk Drive "MP-F52W-30".

[alexf]

Specs for Sony MP-F52W drives are here.


Though the MP-F52W-20 nor the MP-F52W-30 are seen there, we tried the -30 and it works fine.

[alexf]

Spec Sheet here:
https://manualzz.com/doc/19851976/sony_m...ochure.pdf