HP SureStore Optical Jukebox 160ex Service Manual page 163

Removal and Replacement
Removing/Replacing the Translate Frame (Including the Picker)
Move the translate frame up and lock it while reinstalling the encoder
strip.
Ensure that the encoder strip passes through the sensor slot on the
sensor PCA mounted on the side of the picker frame (see Figure 5-22).
The strip may be moved off its mounting peg while you are replacing the
translate frame in the chassis.
Chapter 5 5-41