Internal Construction And Major Parts Configuration; Shutter-Release Mechanism; Electrical Components - Canon EOS 5D Service Manual

２）Internal construction and major parts configuration
The EOS 5D's basic internal construction
and major parts configuration are the same
as the EOS 20D's. Thanks to the design and
manufacturing know-how accumulated with
previous EOS Digital cameras and the low-pass
filter integrated with the CMOS cover glass, the
EOS 5D could be made more compact at lower
cost.
Table 009 shows the parts count.
３）Shutter-release mechanism
The shutter-release mechanism is
basically the same as the EOS-1D-series
cameras. The shutter-release time lag
from SW-1 ON is approx. 75 ms (maximum
aperture to f/3.5 or less). The viewfinder
blackout time is approx. 145 ms.
Note: Stroke adjustment is not possible by a service center.
４）Electrical components
The EOS 5D's circuit board configuration consists of four hard boards consisting of the
digital control circuit board, camera control circuit board, display control circuit board,
and power source circuit board (Fig. 032). Through various connectors, these boards are
connected to 20 flexible circuit boards.
On page 21, Fig. 033 shows the location of the major mechanical components, Fig. 034
shows the location of major circuit boards, and Fig. 035 shows a cross section at the center.
Digital control circuit board
Power source circuit board
Optics
Mechanical parts
Electrical parts
Circuit boards
Lead wires
Total (Official)
Screws and washers
Total
＊The shutter unit is counted as one part.
＊The DC/DC converter is counted as one part.
＊The E-ring is counted as a washer.
＊The official total excludes the screws and washers.
Table 010 Shutter-release stroke and pressure
Shutter button protrusion
Standby position to SW-1
ON
SW-1 ON to SW-2 ON
Camera control circuit board
Display control circuit board
Fig. 031 Major circuit boards
18
Technical Information
Table 009 Parts Count
Item EOS 5D
20
321
1110
24
7
1482
162
1644
State Stroke
1.3 mm
0.6 mm
0.25 mm
EOS 20D
20
301
826
27
19
1193
167
1360
Pressure
−
85 g
350 g