11 Jul
2016
11 Jul
'16
3:51 a.m.
Eric,
I've restored a couple Silent 700 and found that the grease in the head lift solenoid
had become very sticky (ie, no longer grease) and after completely cleaning and applying
new (white lithium grease) the solenoid works much better. I also had one of the knobs
you mention split but was able to repair with super glue.
I also found that the line advance belt in one unit had been completely "eaten"
by, I assume ozone, and all that was left were the fiber glass threads. Amazing.
Love these Silent 700s, so keep 'em running!
Chris
On July 10, 2016 9:38:15 PM CDT, Eric Smith <spacewar at gmail.com> wrote:
On further study, I find that I misunderstood the
nature of the print
mechanism in the TI Silent 700 model 763. What I thought was the line
advance solenoid is actually a head lift solenoid. It fooled me
because it is actuated every time the line is advanced, but the actual
line advance is performed by a stepper motor, like the newer variant
of models 743 and 745, rather than by a solenoid as in the older
variant of models 743/745.
The missing spring and knob prevent the head from being held in close
enough proximity to the thermal paper. I'll have to figure out how to
secure the parts in place in order to make it work reliably.
--
Chris Elmquist