TM 11-7025-210-23
4-42. ADJUST STROBE DETECTOR ASSEMBLY (CONT)
4.
Loosen adjust nuts on detector assembly.
5.
Looking at an angle of about 15 degrees over top of
printed wire board, slide detector assembly forward or
backward until leading edge of strobe disc slot (Point B)
is alined with center of viewing hole (Point A) in printed
wire board.
6.
Tighten adjust nuts.
7.
Close up line printer (para 4-18).
8.
On control panel, press TEST button.
9.
If paper handling is still faulty, use method B to adjust
detector assembly.
NOTE
Method B uses oscilloscope readout to fine tune
strobe detector position.
Method B
1.
Check strobe detector adjustment using method A steps
1-8.
2.
Set up oscilloscope as follows:
VOLTS/DIV
CH1 - 5V/cm
CH2 - 5V/cm
TIME/DIV
A - 2 ms
TRIGGER A: POSITIVE
TRIG MODE: AUTO/NORM
TRIG SOURCE: A-NORM/A or chan 1
VERTICAL MODE: CHOP
4-96
