Symptoms And Solutions - HP 7470A Operator's Manual

Symptoms and Solutions

If you follow the suggestions in this manual, you can obtain high­
quality plots easily. If, however, you do have problems, the f ollowing
suggestions may help you diagnose and correct the problem.
Possible Cause
Plotter Does Not Respond
Front-panel controls are
inoperative.
Plotting Does Not Occur Where Expected
Pl and P2 are positioned as
set for a previous plot.
Coordinate origin location is
shifted.
Lines are drawn off the paper.
Solution
Commands
to
If movement of the pen holder
will
has been obstructed, the
plotter not respond to
front-panel controls or pro-
grammed commands. To cor-
rect this situation, remove the
obstruction and cycle the
switch to then ON again.
OFF,
is
When new paper loaded, Pl
and P2 retain their previously
set positions. Reset .pl and P2
or return them to their default
locations. Default positions
are set using HP-GL command
IN or IP;, by turning the plot-
ter off, then on again, or by
performing a front-panel reset.
If the paper is not properly
positioned against the paper
stop when the pinch wheels
are lowered, the coordinate
origin is shifted proportion-
ately and plotting can occur
off the paper.
The switch may be set to
A4/US
when 8'/ , X 11 inch paper is
A4
loaded. To correct this situa-
tion, set switch to
A4/US
is
Remember, the position of this
switch sensed only when
the plotter is first turned on,
after a front-panel reset, or
when the HP-GL command
IN is received.
LINE
-
us.
27