FSA03601-R.3629.A
- E1・ SB-600 -
Electricity
Circuitry
SB-600 consists of the Custom IC, 8-bit CPU, EEPROM and other peripheral circuitry
. (ref. "Block diagram" on Page E4.)
・
Battery:
4 size-AA batteries can be inserted internally in SB-600. Available types are alkaline manganese battery, NiCd battery,
nickel-hydrogen battery, lithium battery, nickel manganese battery.
・
Pressurization circuit:
This increases the voltage of internal batteries, and charges the main condenser up to the given voltage (330V).
・
Voltage detection circuit:
This outputs the voltage of lighting ready-light and the voltage of stopping pressurization to the A/D input terminal of CPU.
・
Safety circuit:
This always monitors the voltage of charging the main condenser when batteries are inserted, irrespective of power-supply
of SB-600. In case the voltage exceeds the given voltage (350V), the light is forced to be emitted in order to prevent
damages to the main condenser.
・
Flash control circuit:
This starts light-emitting of flash-tube based on the flash-start signal (TG circuit) output by the Custom IC, and stops
light-emitting based on the flash-stop signal (STP circuit). The flash-signal output by the safety circuit is irrelevant to the
status of the power switch.
・
Custom IC:
This consists of the data communication circuit, decoder circuit, camera interface, voltage monitoring circuit, metering
circuit, TG circuit, STP circuit, AF assist illuminator circuit, data communication circuit, and buzzer drive cirucit.
・
Data communication circuit:
This connects the CPU by 5-bit signal wires and STB terminal, totalling 6 signal wires. The moment the signal of STB
terminal turns OFF, this sets the address for the Custom IC, and the moment the STB terminal turns OFF, this writes the data
in the Custom IC or reads the data that is set in the Custom IC.
・
Decoder circuit:
This decodes the address and data that were received at the data communication circuit, and performs various settings for
internal each block.
・
Camera interface circuit:
This makes electrical connections with camera through legs. This sends/receives data to/from camera based on the signals
from CPU. This also controls input/output signals to each terminal of leg contacts.
・
Voltage monitoring circuit:
This monitors the battery voltage in real time, and when the power volrage falls below a given voltage, it stops the
operations of the pressurization circuit temporarily.
Содержание SB-600 FSA03601
Страница 48: ...FSA03601 R 3629 A E6 SB 600 R基板 1 R PCB 1 R基板 2 R PCB 2 ...
Страница 49: ...FSA03601 R 3629 A E7 SB 600 F基板 F PCB L基板 L PCB ...
Страница 57: ... INC ...
Страница 58: ... INC ...
Страница 59: ...CHANGE PAGE 差替え 1 Mar 30 2007 INC ...
Страница 60: ... SEP 10 2004 INC ...
Страница 61: ... IT201 5 差替え x1 INC ...