Internal Construction - Canon EOS 40D Service Manual

1.11 Internal construction
１） External and internal construction
Like the EOS 30D, the main
exterior covers (top, front, and
rear) are made of magnesium
alloy for light weight and high
strength (Fig. 030). Also, since
the grip portion is integrated
with the front cover, excellent
body rigidity is attained.
The body's basic construction
is the same as the EOS 30D's. It
employs a stainless steel chassis
and a mirror box made of high-
strength engineering plastic.
As with the EOS 30D, the
exterior has a high-quality,
black satin finish with a non-slip
texture. The EOS 40D also has sealing material lining the CF card slot cover and battery
compartment cover (not found in the EOS 30D) to improve dust- and water-resistance.
２）Internal components and configuration
The configuration of the major components is basically the same as the EOS 30D with the
exception of the following units which have been added or changed:
・ Self Cleaning Sensor Unit
・ LCD monitor made bigger from 2.5 in. to 3.0 in.
・ Two driving motors to attain approx. 6.5 fps continuous shooting speed
・ Extension system terminal
Table 007 shows the parts count, and Fig. 032 on shows a cross section at the center.
Table 007 Parts count
Item EOS 40D
Optics
Mechanical parts
Electrical parts
Circuit boards
Lead wires
Total (Official)
３）Shutter-release mechanism
The shutter-release mechanism and
shutter-release stroke and pressure are
the same as the EOS 30D's (Table 008).
The shutter-release time lag from SW-1
ON is about 0.059 sec. (Aperture stopped
down by no more than 3.5 stops.) And the
viewfinder blackout time is about 0.1 sec.
All manuals and user guides at all-guides.com
Fig. 030 Exterior covers and internal construction
* The shutter unit is counted as 1 part.
EOS 30D
* T he official parts count excludes the screws and washers (166 in EOS
20 20
40D, 164 in EOS 30D).
336 338
* F or the electrical parts count, previously the DC/DC converter and
1138 1053
flash unit were counted as one part. In the case of the EOS 40D, since
24 27 the unit configuration is different, the parts comprising the unit are
counted.
14 15
1532 1453
14
Technical Information
Table 008 Shutter-release stroke and pressure
State
Shutter button protrusion
Standby position to SW-1 ON
SW-1 ON to SW-2 ON
Stroke Pressure
1.3mm ―
0.55mm 140g
0.3mm 330g