Flash Circuit; Overview; Operation - Sony DSC-S75 Training Manual

Overview

The flash on this model is a pop-up flash that automatically pops up when flash is needed.
•
The flash assembly is under spring tension in the closed position. It is held there by a plunger.
•
When flash is required, a solenoid releases the plunger and the flash pops up.
•
The flash assembly must be pushed down manually to close it.

Operation

DC UNREG
F405
Q405,
Q406
STORAGE
CAPACITORS
CHARGE ON/OFF
IC102
FRONT
CONTROL
LENS
PHOTO
TR.
The circuits controlling the flash are dispersed on four boards and the lens. Therefore, a somewhat detailed
description of the flash operation is needed so that the technician can isolate the flash problem to a particular
board.
1. The 300 volts dc-dc converter on the BT-006 board charges the two flash storage capacitors.
Chapter 16 - DSC-F707 Flash Circuit
BT-006 BD.
Q408,T401
FLASH DC-
DC CONV.
Q409
FLASH
+ +
FLASH
CHARGE
11
STB-CHARGE
XSTB- FULL
XSTB
XSTB-POP-UP
STB-PLUNGER
FR-181 BD.
PHOTO-TR-OUT
PHOTO-TR-ON
SY-072 BD.
FIGURE 16-1 - S707 FLASH UNIT
CN404
300VDC
1
DET.
CN403
12
BATT./
FLASH
CHARGE
LED
IC301
CAMERA
DSP.
40
16. DSC-F707 Flash Circuit
EVER
300VDC
3V
POP-UP
POP-UP
SOLENOID
SWITCH
FP-488 BD.
XSTRB-ON
16DSC02 1503
FLASH
FLASH
ON
10/10/02