Canon PowerShot 350 Service Manual - Page 36
Flash, System, Block
 |
View all Canon PowerShot 350 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 36 highlights
Part 2: Technical Information 1.4 FLASH SYSTEM BLOCK CCD Light metering Sensor (Flash) Flash CCD OUT Comparator ST1 STO (I) V H R 4) Sub CG Signal Procesing • Section MCR PBLK CPOB DCLK DATA Fig. 2-4 Flash System Block The flash system is controlled as indicated by the above block diagram. The flash is fired by a trigger (STO) generated within the Clock Generator (CG). The light reflected from the subject is sensed by the metering sensor compared with the reference in the Comparator and input to CG as ST1 to control the flash duration. 2-4
-
1 -
2
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
-
11
-
12
-
13
-
14
-
15
-
16
-
17
-
18
-
19
-
20
-
21
-
22
-
23
-
24
-
25
-
26
-
27
-
28
-
29
-
30
-
31 -
32 -
33 -
34 -
35 -
36 -
37 -
38 -
39 -
40 -
41 -
42
-
43
-
44
-
45
-
46
-
47
-
48
-
49
-
50
-
51
-
52
-
53
-
54
-
55
-
56
-
57
-
58
-
59
-
60
-
61
-
62
-
63
-
64
-
65
-
66
-
67
-
68
-
69
-
70
-
71
-
72
-
73
-
74
-
75
-
76
-
77
-
78
-
79
-
80
-
81
-
82
-
83
-
84
-
85
-
86
-
87
-
88
-
89
-
90
-
91
-
92
-
93
-
94
-
95
-
96
-
97
-
98
-
99
-
100
-
101
-
102
-
103
-
104
-
105
-
106
-
107
-
108
-
109
-
110
-
111
-
112
-
113
-
114
-
115
-
116
-
117
-
118
-
119
-
120
-
121
-
122
-
123
-
124
-
125
-
126
-
127
-
128
-
129
-
130
-
131
-
132
-
133
-
134
-
135
-
136
-
137
-
138
-
139
 |
 |
Part
2:
Technical
Information
1.4
FLASH
SYSTEM
BLOCK
CCD
CCD
OUT
Light
metering
Sensor
(Flash)
Flash
Comparator
ST1
STO
(I)
V
H
R
4)
Sub
CG
Fig.
2-4
Flash
System
Block
•
Signal
Procesing
Section
MCR
PBLK
CPOB
DCLK
DATA
The
flash
system
is
controlled
as
indicated
by
the
above
block
diagram.
The
fl
ash
is
fired
by
a
trigger
(STO)
generated
within
the
Clock
Generator
(CG).
The
light
reflected
from
the
subject
is
sensed
by
the
metering
sensor
compared
with
the
reference
in
the
Comparator
and
input
to
CG
as
ST1
to
control
the
flash
duration.
2-4