Ics & Pds - Canon 580EXII Service Manual

. ICS & PDS
1) IC
Ckt Brd Symbol Name
A IC107S
A IC106S
A IC101S
A IC102S
A IC19
A IC15
A IC16
A IC17
A IC4
A IC18
C IC108S
B IC304
I IC20
2) PDs
Brd Symbol Function
PD3 Pilot Lamp (Charge completion)
PD5 Flash Check Lamp
PD1 AF assist beam LED (Horizontal AF)
PD9 AF assist beam LED (Vertical AF)
PD2 AF assist beam LED (Area AF)
PD8 Remote Control Receptor Sensor
PD10 Flash control optical sensor
PD11 External flash metering sensor
MPU
Comparator IC
EEPROM
Metering IC
OR Gate
Step-up Voltage regulator
Voltage regulator IC
Voltage regulator IC
Voltage-detector IC
Motor driver
Operation amp
NOR Gate
Analog switch

Technical Information
Function
Overall Control
Controls signal comparisons
Stores electrical adjustment settings.
Flash output control
Remote control pulse shaping control
Generates a regulated 5.5V
Generates Digital VCC (4.8V)
Generates Analog E1 (4.8V)
Starts MPU according to VCC detection result.
Controls the zoom motor.
Stabilizes the Area AF-assist light intensity.
Gate control of converter FET
Switches optical sensor