Canon SPEEDLITE 540EZ Service Manual page 56

Part3: Repair Information
1) Assembly and Disassembly Precautions
[NOTE El : Removing the battery box, (B) CBA and (C) CBA
'* Remove the three connectors on (B) CBA from the flash head.
* Remove the 2-pin connector on (B) CBA from (A) CBA.
* Remove the 14-pin connector between (A) CBA and (B) CBA.
NOTE B : Removing the (A) CBA connector
e Remove the four connectors from the flash head.
« Remove PD2 and optical connector (2) from the soldered surface side of (A)
CBA.
(At this point, the flash head becomes free.)
« Remove the five screws and CBA holder.
NOTE 13] : Removing the main switch
« When (A) CBA is removed, the main switch spring and steel ball become free.
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