Canon SPEEDLITE 540EZ Service Manual page 60

Part 3: Repair Information
1) Assembly and Disassembly Precautions
NOTE EJ =: _'Removing (D) CBA
* Remove the connector from main flash unit (L) CBA.
* Remove the two screws fastening (D) CBA.
* When assembling, prevent the lead wires of the above connectors and the
optical connector from being pinched.
NOTE BJ: Removing (E) CBA
* Remove the screw to remove zoom switch (2).
* Remove the two lead wires (red, black) from the zoom motor.
« Remove the two screws fastening (E) CBA.
Figure 3-7 (E) CBA
NOTE 13] : Assembling the zoom pin
* When assembling the zoom pin, make sure that zoom pin (5) is held down by
the zoom shaft. (Take care to prevent the zoom pin and the spring from
becoming loose.).