15 Jan
2013
15 Jan
'13
1:18 a.m.
On Mon, Jan 14, 2013 at 12:11 AM, tony duell <ard at p850ug1.demon.co.uk>wrote:
I've ordered some replacements along with some O-rings for the mag card
reader.
What are you doing about the card reader? My repair involves machining a
new
roller hub from brass rod. It works, but you need a small lathe to do it.
I did find your documented method when looking for options, but I lack
access to a lathe to do it. I've ordered some matching O-rings (with a
square cross-section) which hopefully will work. If not, they cost me next
to nothing :).
I assume (without checking the schematics) that's one of the solenoid
drivers.
Yes, that's correct.
Good to know. The ones that are in there seem to be
in good shape,
they're still pretty rubbery and aren't degrading into goo like
everything in the 9810 did. But I'll need to replace them at some
point, I'm sure.
That's a fairly easy repair, at least once the drive is
apart...
At least with the cassette drive, O-rings were the original 'tyres' so you
don't have
to modify any parts to fit new ones.
Yes, that looks like a simple repair.
> If there is 09864-66564 PCB in there, the
the solenoids are connected
between
> pins on that board (open-collector stages on
the board) to +12V.
Shouldn't
be hard
to check.
Spent some time debugging last night and narrowed it down to a faulty
transistor (Q8 on the schematic, for those keeping score at home). I've
ordered a replacement and hopefully that'll get everything humming again.
I looked at the schematic the other day and noticed
that if the
motor is running correctly (so the motor switching transistor is being
driven), the only things that can cause the solenoid not to work are
the driver transistor or the solenoid itself.
I have tried to send you the Datafile (HPCC magazine) articles. Let
me know if there are any problems.
Thanks, received those and I'll be going through them tonight. Thanks!
- Josh
-tony