T M 9 - 4 9 3 1 - 3 8 1 - 1 4 & P -2
Remove Variable Resistor:
l To replace any of variable resistors R1 through R6 or R10, do
frame 18. To replace variable resistors R7, R8 , or R13, do
l Use this frame to replace any of seven variable resistors:
C O N T R A S T R 2
S E N S I T I V I T Y R3
RETICLE BRIGHTNESS R10
C O N T R A S T R 4
RETICLE BRIGHTNESS variable resistor R10 (1) is shown.
Read paragraph 2-4 on tagging and soldering wires and
switches before doing any work.
Tag and unsolder two wires and jumper wires (2) from terminals (3) of variable
Unscrew and take off nut (4) and Iockwasher (5) with wrench. Get rid of variable
resistor (1), nut (4), and Iockwasher (5).
Install Variable Resistor:
3. Put new variable resistor (1) through hole in panel assembly (6) so tang (7) sits in
4. Screw on and tighten new nut (4) and new Iockwasher (5) with wrench.
5. Solder wires (2) to variable resistor (1).
GO TO FRAME 19
Para. 2-6, Task 9