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--- 5_25_floppy_drives:nec_fd1157c [2021/05/04 08:31] – js
+++ 5_25_floppy_drives:nec_fd1157c [2021/06/11 11:32] (current) – js
@@ Line 6: / Line 6: @@
 ^ Density    | <abbr>High Density (HD)</abbr>, <abbr>Double Density (DD/2D)</abbr>  |
 ^ Sides    | <abbr>Double Sided (DS/2S)</abbr>, <abbr>Single Sided (SS/1S)</abbr> |
+^ Rotation speed | 300, 360 |
 ^ Maximum seekable tracks   | 84((Modification may be required)) |
-^ Interface | PC-AT |
+^ Interface | Shugart \\ (PC-AT compatible) |
 ^ Data Connnector | 34 position card edge |
 ^ Power Connnector | 4 pin Molex |
@@ Line 13: / Line 14: @@
 ^ Head loading | Solenoid |
 ^ Disk loading | Lever |
+^ Known colors |<WRAP>
+| <colorswatch #EDE9D3: > | Light Beige \\ (PS/2 Beige) |
+</WRAP>|
 </WRAP>
 ====== NEC FD1157C ======
+The FD1157C is a 5.25" double sided high density floppy drive made by NEC.
+It uses a metal belt mechanism to facilitate head movement and locks the disk with a lever. Head loading is done with a solenoid.
+It uses the [[#g9zhf|G9ZHF]] control board and the FDM-530BQ, GFS-505 or DR-9324 motor board.
+===== Pictures =====
+| {{:5_25_floppy_drives:nec_fd1157c:back1.jpg?200 |}} \\ {{:5_25_floppy_drives:nec_fd1157c:back2.jpg?200 |}} | {{:5_25_floppy_drives:nec_fd1157c:top1.jpg?200 |}} \\ {{:5_25_floppy_drives:nec_fd1157c:top2.jpg?200 |}} | {{:5_25_floppy_drives:nec_fd1157c:bottom1.jpg?200 |}} {{:5_25_floppy_drives:nec_fd1157c:bottom2.jpg?200 |}} \\ {{:5_25_floppy_drives:nec_fd1157c:bottom3.jpg?200 |}} {{:5_25_floppy_drives:nec_fd1157c:bottom4.jpg?200 |}} |
+| {{:5_25_floppy_drives:nec_fd1157c:front1.jpg?200 |}} \\ {{:5_25_floppy_drives:nec_fd1157c:front2.jpg?200 |}} \\ {{:5_25_floppy_drives:nec_fd1157c:front3.jpg?200 |}}| ::: | ::: |
+| {{:5_25_floppy_drives:nec_fd1157c:pcb1.jpg?200 |}} \\ {{:5_25_floppy_drives:nec_fd1157c:pcb2.jpg?200 |}}| ::: | ::: |
+===== Jumper settings =====
+==== G9ZHF ====
+{{ :5_25_floppy_drives:nec_fd1157c:g9zhf.pdf |}}
+++++View PDF|
+{{pdfjs 100%,800px>:5_25_floppy_drives:nec_fd1157c:g9zhf.pdf?page-width}}
+++++
+==== Head cover coming loose ====
+Over time the foam the adheres the head cover to the head assembly degrades and the head cover will fall off.
+While not being critical it is recommended to fix this issue.
+{{:5_25_floppy_drives:nec_fd1157c:fix_headcover_1.jpg?200|}}
+{{:5_25_floppy_drives:nec_fd1157c:fix_headcover_2.jpg?200|}}
+{{:5_25_floppy_drives:nec_fd1157c:fix_headcover_3.jpg?200|}}
+{{:5_25_floppy_drives:nec_fd1157c:fix_headcover_4.jpg?200|}}
+{{:5_25_floppy_drives:nec_fd1157c:fix_headcover_5.jpg?200|}}
+The Head cover repair can be performed by following these steps:
+  - Clean the head cover and the head assembly of any remaining glue and foam as best as possible.
+  - Cut out a small rectangle of neoprene sealing tape.
+  - Glue the rectangle to the head cover with the adhesive side facing up.
+  - Let the glue dry completely.
+  - Attach the head cover to the head assembly using the adhesive side.
+===== Modifications =====
+==== 84 track seeking ====
+Not all drives will be able to seek 84 tracks without some moderate modification.
+{{:5_25_floppy_drives:nec_fd1157c:mod_84tracks_1.jpg?200|}}
+The modification can be performed by following these steps:
+  - Unscrew the end stop screw on the stepper motor until it no longer protrudes out the other side.
+  - Re-align the tracks with a front bias, make sure that track 83 can be reached.