HP 9121D: Difference between revisions
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Latest revision as of 01:31, 13 February 2024
HP 9121D
| Preliminary Information | |
|---|---|
| Release Year | 1982 |
| Leak Risk | Low |
| Batteries | None |
| Mounting Technology | Through Hole, SMD, BGA, Sockets |
| Capacitor Types | Aluminum Electrolytic, Ceramic |
| Destructive Entry | No |
| Hardware Specifications | |
| Storage | 3.5in Single Sided Double Density Floppy Disks |
| Power Requirements | |
| Power Connector | IEC C13/C14 Socket |
HP dual floppy drive with Sony OA-D31V-14 model floppy drives.
Known Issues
Disk not spinning
Causes
- Magnetic hall sensors failsure
- Test by removing motor assembly, directly powering, and nudge motor to start spinning
Solutions
- Replace hall THS103A sensors
Cracked D10 Diode
Causes
- Bent flat when reassembled and crushed by screw post
Solutions
- Replace diode
Disassembly Notes
Diode D10 next to one of the screw holes on logic board is very easily pinched when reassembling and may be cracked. Be sure to bend it upright before putting PCB back onto chassis
Original Parts
Main Logic Board
FC-6
| RefDes | Qty | Forward Voltage | Mount |
|---|---|---|---|
| D10 | 1 | 3V | Axial |
Replacement Parts
Basic PCB Name
| RefDes | Qty | Compatible Part Number | Order Links |
|---|---|---|---|
| D10 | 1 | 1N5225B-TAP | Mouser |
If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric searc
Related Links
- More Information: https://wiki.techtangents.net/wiki/HP-9121D_3.5%22_Double_Density_Single_Sided_Floppy_Drive