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SECTION VI.
TYPE 122 PRINTER
Operator Adjustments to the Printer
1.
To perform a head-of-form adjustment.
a.
Correction to line phasing may be made dynamically while
printing by adjusting the head-of-form control which is lo-
cated in the upper left area of the printer mechanism.
Clockwise rotation of this control moves the printed output
up with respect to the form, and counterclockwise rotation
moves the printed output down.
2.
To perofrm a character /index adjustment:
If any "clipping" or "ghosting" of characters occurs during a printing run,
the character /index adjustment knob may be used to correct either of
these conditions.
This knob may also be used to compensate for any
clipping or ghosting that may occur when the number of carbons to be
printed is changed.
This adjustment should be made when the printing
run is being set up.
Clipping refers to the condition where a printed
character is vertically misaligned, thus causing either the top or the
bottom of the character to be incompletely printed.
Ghosting refers to the
condition where a character appears to have a dual image or "shadow. "
The following procedures should be used when performing a character /
index adjustment:
a.
After determining the number of carbons to be used during the
run, set the stock-thickness adjuster on the right side of the
printer mechanism to the desired position.
Use higher-num-
bered settings for thicker forms.
b.
Examine the printed output and adjust the character /index
control until the proper setting is obtained.
If clipping or
ghosting still occurs, readjust the control until the best print
quality is obtained.
3.
To perform a hammer timing adjustment:
Whenever any characters in a line of printed output are misaligned, an elec-
tronic adjustment of the print hammer timing for the misaligned print posi-
tions (columns) is necessary.
The potentiometers for controlling the print
hammer timing are numbered to correspond to the printed columns.
WARNING: It is imperative that the following precautions be observed when
a.
b.
performing a print hammer timing adjustment:
(l)
Use only the special, non-conductive tool supplied;
(2)
Do not bear down or use force on the circuit cards or
the card guides;
(3)
Keep fingers off the circuit cards; and
(4)
Do not drop any foreign object into the chassis or
down between the circuit cards.
Determine which print columns are misaligned by checking the
column scale.
While printing, adjust the appropriate potentiometer in the
printer electronics cabinet until the character is properly aligned
when printed.
If the character is being printed above the line,
turn the potentiometer adjustment clockwise.
If the character is
being printed below the line, turn the potentiometer adjustment
counterclockwise.
6-17
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