7.

Troubleshooting

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Problem
Soon after thc power is turned
on, the indicator lamp turns on'
Although the
5
icon is lit in
the viewfinder, the slave does
not fire.
The flash picture cnmc out
undrrexposed
The slave d~~cs nclt fire evcn
when the sl~utt<.~.
i,
~rrlra.;ed.
The ST-EP does not enlit th<.
XF-assist beam.
The slave's flash-rcady indica.
tor (blinking AF
-
assist beam
I
turns off.
The test transmission does not
work.
The flash ratlo cannot be set.
Probable Cause
If the power is turned on and the ST-E2 is not
used for
90
scc., the power turns off automatically.
The
5
]con in the v~ewfinder does not indicate
flash ready. Rather. it indicates that the ST-E2 is
able
to
transm~t.
The flash ratio control lamp was lit even thouph a
multi
-
flash system with flash ratio settings was
not used.
'The subject is beyond the effective flash range.
'I'hc sl~ivr's channel does not lnatcli the ST-E2's
oh;~nnrl.
Tl~r sl;~ve is
tor^
far away from thc ST-E2.
'Thu sl;~vc is
r~r,
tl~r
side
or hack of thr c:lmr,r;l.
'l'hc
Speedlite's
slave
sr,nsar
IS
not pmperly point
-
c.d
3t
L~C
ST-E2.
'l'hc Ilr~sh ratio h:lu Ihcrr~ srt, hut thc slave ID has
hrrn set to
C.
1'Iic,
r;~rner;l is not
;II~
KOS-3.
The, sla\.e is in the SE mode.
You prcssrd the shutter button halfway and this
activ;~ted the exposure meter
Thr camera is not an EOS
-
3.
The ST-E2's main switch is set to
<HOLD>.
Solution
Either press the shutter button halfway or press
the
<
PILOT
>
button.
When the slave is ready to fire,
~ts
A12-assist beam
emltter blinks
Turn off the flash ratio control lamp bcforc takinp
the picturr~.
Place the slave nearer to the suhect or use
3
larg-
cr aperture (smaller f
-
number).
Set thr slavc to thesamechannel as thr ST-E2.
Position the slavc nearer to the ST-E2 :ind tcst
the transmission befirrc taking the picture.
Use On'-(:amera Shoe Cord
2
(solrl separatrlyl and
point the ST-E2's trtlnsmitter toward the slave.
Use thc
RSOEX's
bounce feature trl point its sI;~vc
sensor townrd the ST
-
EZ.
Set thc slave
11)
to
A
or

B.

If thc
EOS
camcra has a built
-
in AF
-
assist beam.
the camera will rmit the beam instead ofthe ST-
E2.
Press the ST-E2's
<
PILOT
>
button to cancel the
slave's SE mode.
Make sure the metering display in the viewfinder
is
off Then test the transmission.
The flash ratio cannot he set with cameras other
than the EOS
-
3.
Set the main switch to
<
I
1.
COPY