Canon ST-E2 - Troubleshooting Guide

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If there is a problem, refer to this Troubleshooting Guide.
The slave unit does not fire.
• The ST-E2’s battery is installed in the wrong orientation.
 Install the battery in the correct orientation. (p.6)
• The ST-E2’s battery is exhausted.
 If the flash recycling time takes 30 sec. or longer until the pilot
lamp lights, replace the battery. (p.6)
• Attach the ST-E2 securely to the camera.
 Attach the ST-E2’s mounting foot securely to the camera. (p.6)
• The electrical contacts of the ST-E2 and camera are dirty.
 Clean the contacts. (p.4)
• The ST-E2 and slave unit are not set to the same channel.
 Set the ST-E2 and slave unit to the same channel. (p.7, 8)
• The slave unit(s) is not positioned properly.
 Position the slave unit(s) within the ST-E2’s wireless transmission
range. (p.9)
 Point the slave unit(s)’s wireless sensor toward the master unit.
(p.9)
• The slave ID has been set to C for flash ratio shooting.
 Set the slave ID to A or B. (p.10)
The power turns off by itself.
• After 90 sec. of idle operation, auto power off took effect.
 Press the shutter button halfway or press the test transmission
button. (p.7)
The flash exposure tends to be underexposed.
• The flash ratio originally set for E-TTL II autoflash with multiple
slave units was applied to normal flash shooting.
 Turn off the flash ratio control lamp before shooting normal flash
pictures. (p.9)
• The subject was beyond the range of the flash.
 Move the slave unit(s) closer to the subject. (p.9)
Troubleshooting Guide
ST-E2_E.fm Page 13 Tuesday, May 9, 2006 2:32 PM