23 May
2017
23 May
'17
7:55 p.m.
On 05/23/2017 05:40 PM, Fred Cisin via cctalk wrote:
On Tue, 23 May 2017, Warner Losh via cctalk wrote:
In addition to cleaning the heads, look at the parts
that slide when the
head moves. The old grease is probably in bad shape by now. With a
little solvent (WD-40 is NOT a solvent), clean the old grease and
re-lube them. I used to use a molybdenum disulfide grease that I had
around - I have no idea what the "RIGHT" grease would be.
Teac 55s don't often need the radial alignment adjusted, but it could
happen. The failure after track 35 could be alignment, but it could
also be the grease.
Caked or dry grease can even occur on NOS drives. I was unpacking some
new Samsung SFB-321 3.5" drives. They didn't pass diagnostics. Popped
them open and the leadscrew grease had turned yellow and caked. Cleaned
the grease off with some Perc, put a very thin film of silicone grease
on the leadscrew and the drives were good to go.
You can see if you've got an alignment problem if you format a floppy in
the suspected drive and you can read it from end to end without error.
IMD is good for this sort of thing.
--Chuck