Canon PowerShot 350 Service Manual - Page 33
Overall, Block, Diagram
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Part 2: Technical Information Fig. 2-1 Overall Block Diagram (Camera CB-7S2 ) 0Lens Unit IRIS Driv CCD 1/3" VGA L V-Driv EVR CDS,AGC t CG (Clock Generator) OSC (24.5MHz) BUFFER (Plash CBA.) Light metering Sensor Light metering Circuit Flash Flash Fire Circuit Flash Charge Circuit elf Time LED C Main CBA D-RAM (4Mbit) FIFO (1Mbit) ND ASIC 50pin RISC-µCOM Battery Voltage Detedt EEPROM -7 CLOCK (Date) 32KHz CF CARD Operation SW CBA ower/Interface CB VIDEO OUT Circuit Battery LR6 x3 Power Circuit UNREG. 18V 5V 3.3V -8V -25V RGB Converter 1.8" LCD Back Light 0 VIDEO OUT -\/ DIGITAL Terminal DC IN TERMINAL NI VEl OVI a N3O1 71V1:l3AO
Fig.
2-1
Overall
Block
Diagram
(Camera
CB
-
7
2
S)
Lens
Unit
0
IRIS
Driv
CCD
1/3"
VGA
V-Driv
L
OSC
(24.5MHz)
EVR
CDS,AGC
t
CG
(Clock
Generator)
BUFFER
(Plash
CBA
.)
Light
metering
Sensor
Flash
Flash
Fire
Circuit
Light
metering
Circuit
elf
Time
LED
Flash
Charge
Circuit
D
-RAM
(4Mbit)
ND
C
Main
CBA
FIFO
(1Mbit)
ASIC
RISC-μCOM
EEPROM
ower/Interface
CB
CLOCK
(Date)
50pin
Battery
Voltage
Detedt
-7
32KHz
VIDEO
OUT
Circuit
RGB
Converter
0
CF
CARD
Operation
SW
CBA
1.8"
LCD
Back
Light
VIDEO
OUT
Power
DIGITAL
Terminal
UNREG.
18V
—\/
5V
Circuit
3.3V
Battery
-8V
-25V
LR6
x3
DC
IN
TERMINAL
NI
V
El
OV
I
a
N3O1
71
V
1:l
3
AO
Part
2:
Technical
Information