Repair Preparations; Discharge The Main Capacitor - Canon 580EXII Service Manual

．REPAIR PREPARATIONS
Important! Read this before starting repairs.
1.1 Discharge the Main Capacitor
The Speedlite's main capacitor holds a maximum of 330V. Even after the flash is fired at full power,
the capacitor still retains 70V to 90V. Before disassembly, be sure to discharge the main capacitor.
1. Set the flash head to the normal position (bounce angle 0). (Fig. 001)
2. Remove both the Side Cover (A) on the Pivot Ass'y release button side and the double-
sided tape.
CAUTION
3. There is a plus terminal of the main capacitor shown as a red dot. Use a discharging
resistor of about 500 ohm and 10w to discharge by short-circuiting this terminal and a
plate of the mounting foot. (Fig. 002)
CAUTION
Do not lose the lock pin.
Fig. 001 Position of the lock pin
When discharging, attach one end of the discharger to the plate of the
mounting foot first, and then connect another end to the plus terminal
of the main capacitor.
Do not touch the contacts to the camera of the mounting foot.
Main Capacitor (+)
Fig. 002 Discharging Points

Repair Information
Lock Pin
Plate