Sorry if this gets lengthy...
The dealer had tried, unsuccessfully, to reproduce the error, but have
they performed any maintenance on the machine (Cleaning / Lubrication) ?
Most AC powered devices will work properly even if your house supply is
low. I'm sure this is not the problem, nor is it your outlet. The
internal computer is detecting a fault and is run on DC voltage that is
internally produced and regulated. If the DC voltage was bad you would
probably notice other strange behavior.
The computer is obviously detecting what it thinks is a fault.
The only way it can detect this type of fault is from sensors or
back feed from motors. Dirty or worn bearings can cause motors to run at
a lower than expected RPM, causing the computer to think there is a
fault. If you've ever had to remove threads from the foot area it is
possible that there is more thread internally wrapped around a spindle,
motor or gear causing it to bind, which will lower the rpm, again
causing a possible reason for the computer to think there is a problem.
If the machine uses any optical sensors they may need to be cleaned as
they could have a buildup of fabric 'dust' causing them to produce
inaccurate readings. Magnetic sensors generally do not need cleaning but
if any are loose they can cause problems.
It may be as simple as getting a can of compressed air used for
computers. Use it to blow any dust and dirt from the inside of the
unit, hopefully cleaning any sensors.
Hope this helps.
Mar 12, 2008 |
Janome Memory Craft 10000