Canon SPEEDLITE 540EZ Service Manual page 64

Part 3: Repair Information
TMENT
3.1 Adjustment Items
The following four items must be adjusted.
(1) Full charging voltage adjustment ------------VR1
(Adjustment is required when replacing IC8, (A) CBA, (B) CBA, and (D) CBA.)
(2) Pilot lamp lighting adjustment.
(Adjustment is required when replacing IC7, (A) CBA and (B) CBA.)
(3) FA aperture adjustment
(Adjustment is required when replacing IC6, IC7, PD2 and (A) CBA.)
* Short distance at 35 mm:
* Long distance at 35 mi
(4) Manual Low guide number adjustment -----VR5
(Adjustment is required when replacing PD1, IC6, IC7 and (A) CBA.)
* All of the above variable resistors can be externally adjusted by peeling off the
blind plate.
vRi
vR2
VR6
Figure 3-10 Position of Adjustment Resistors
3-13