Paper-Out, Access Cover Interlock And Carriage Sensor Switch Assembly-Ra, Rd/Paper-Out And Carriage Sensor Switch Assembly-Rb, Rc - Digital Equipment LA50 Technical Manual

6.2.12 Paper-Out, Access Cover Interlock and Carriage Sensor Switch Assembly-RA, RD/
Paper-Out and Carriage Sensor Switch Assembly - RB, RC
Perform the following procedure to remove and replace the paper-out, access cover interlock, and carriage
sensor switch assembly.
WARNING
Set the power switch to
0
and disconnect the ac
power cord.
1. Remove the PCB (Paragraph 6.2.6).
2. Remove the top cover (Paragraph 6.2.1).
3. Remove the screw from the power switch cover (Figure 6-15).
4. Remove the two screws from the noise filter.
5. Remove the ground wires on the left of the mechanism.
6. Remove the four screws holding the mechanism to the bottom cover. Remove the printer
mechanism.
7. Cut the switch assembly cable ties.
8. Remove the two screws from the paper-out switch and the screw from the carriage sensor
switch.
9. For model RA or RD, remove the screw from the cover interlock bracket on the side of the
mechanism.
l 0. Remove the switch assembly from the printer mechanism. Guide the paper-out switch lever
from its slot.
11. Replace the assembly by reversing the above procedure.*
12. Run the Print Self-Test (Paragraph 3.2.3). The first character of the line should line up with the
red etch mark on the bail bar.
If
necessary, adjust the carriage sensor switch (Figure 6-15) to
change the line position.
NOTE
If the carriage sensor switch is set too far to the left,
the carriage will jam to the left side.
* Apply Locktite 241 or equivalent to the paper-out and carriage sensor switch screws. Locktite 241 is a
tradename for Thomas and Betts Co.
6-20