HP 8753E Service Manual page 311

1. Make sure the A9 CC switch is in the AIZER position:
a. Remove the power line cord from the analyzer.
b. Set the analyzer on its side.
c. Remove the two corner bumpers from the bottom of the instrument with
a T-15 TORX screwdriver.
d. Loosen the captive screw on the bottom cover's back edge.
e. Slide the cover toward the rear of the instrument.
f. Move the jumper to the AI.X position as shown in Figure 7-2.
g. Replace the bottom cover, comer bumpers, and power cord.
LOST
Figure 7-2. Jumper Positions on the A9 CPU
Source Troubleshooting 7-5