Current Consumption Standards - Canon EOS 7 Service Manual

1.6 C C
URRENT ONSUMPTION
Regarding the power current consumption, the product standard and the product's
actual consumption are shown below.
Measure all the items that can be measured and check that they match the product's
actual consumption.
(Depending on the camera, there may be irregular values.)
Lens:
Temperature and humidity:
Power source:
Film:
At standby (including LOCK)
SW-1 ON
During self-timer (with lamp on)
Red-eye reduction lamp ON
AF serch
Film advance
Shutter cocking (Peak value excluding the rush during cocking)
Film (Peak value excluding the rush during film advance)
Film rewind (Average value from 3 sec. after film rewind starts to the end)
Constant voltage
power source
+
-
Fig. 3-6 Current consumption measurement set-up
S
TANDARDS
EF 50mm f/1.8 II
Room temperature and humidity (60% or less)
Constant voltage power source of 6.2 [V] 1.2 [ohm]
(includes line resistance and contact resistance)
Or use new CR123A x 2 (6 V) batteries (less than 3
months old).
For film transport measurements, constant voltage
power source of 5.4 [V] 0.68 [ohm]
Tri-X (36-ex.) fresh roll (Film advance: Measure at
around frame 20)
Product Standard
60 µA or less
150 mA or less
200mA or less
350 mA or less
350mA or less
1500 mA or less
Hi 1100 mA or less
800 mA or less
Ammeter or other
digital tester
+ -
3-3
Part 3: Repair Information
Product's Actual
Consumption (Approx.)
Service batteries
To camera
30 µA
80 mA
150 mA
270 mA
280 mA
950 mA
800 mA
400 mA