Chapter 7 Servicing
7-6
Figure 7-4. Optical Bench
48OPT
CHOPPER MOTOR REPLACEMENT
Equipment required:
New Chopper Motor (Part No. 4735)
Allen Wrenches - 5/32" and 5/64"
Screwdriver
1. Wear an antistatic wrist strap, see “Safety Precautions,” earlier in this chapter for
more information.
2. Follow the directions for correlation wheel replacement above, up to and including
Step 4.
3. Remove the chopper motor from the motor plate by removing the two screws that
hold it to the motor plate.
4. Install the new chopper motor by following the above directions in reverse.
5. Re-install the instrument cover.
6. Calibrate the instrument.
OPTICAL BENCH REPLACEMENT
Equipment required:
Screwdriver
1. Wear an antistatic wrist strap, see “Safety Precautions,” earlier in this chapter for
more information.
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