Canon C12-8453, Service Manual

Page: 178 / 271

• Basic TTL Adjustment
P
URPOSE
:
To adjust the gain level of the flash sensor.
S
TANDARD
:
Average ±1 EV
P
REPARATIONS
:
None
A
DJUSTMENT
:
1) The screen on the right appears. If
OK, press the RETURN key.
2) The adjustment is carried out
automatically.
3) After adjustment ends, the TTL level
adjustment is started. After the TTL
level adjustment, follow the
procedure below to check the results
of the adjustment.
C
HECK
P
ROCEDURE
:
1) Attach the camera on the tripod, and then attach the EF 50 mm f/1.8 tool lens and
the Speedlight.
2) Set TV=1/125, AV=F5.6 in the manual mode.
3) Set the camera to ISO 100, set the measuring tool (flash meter or EF8000, 5000) to
ISO 100, release the shutter and take a measurement. Next, set to ISO 800, and
release the shutter again and take a measurement.
4) If the measurement is within the standard at ISO 100 and 800, the camera is
normal (properly adjusted).
5) If the value is out of standard even if the adjustment is done, replace the TTL
sensor.
Part 4: Electrical Adjustment
4-30
• Be sure to use the TTL flash (540 EZ, 300 EZ, etc.)
CAUTION
ATTL1
TTL Adjustment
TTL gain adjustment will be carried out.
Press RETURN to start adjustment.
Press space bar to return to Flash Metering Adjustment menu.