Read Sony DSC-F55 / DSC-F55E (serv.man2) Service Manual online
19
4-2-1. Flash and Reading-out Images
Operation block diagram of flash and timing are shown in Fig. 4-2.
FLASH
S204
FLASH
D103
IC603
HI Controller
HI Controller
34
16
17
56
93
32
XSHTR LOCK SW
–2
–1
STB LED
STB CHG
XSTB FUL
XSHTR ON
Flash Unit
CHARGE
Fluorescent
tube
tube
IC501
77
SHUTTER
(RELEASE)
Button ON
(RELEASE)
Button ON
XMACRO/NORMAL
Signal flow
R517
R512
R513
STRB ON
STROB A IN
PHOTO
TR
TR
SHUTTER
(RELEASE)
I
Input from switch
STB CHG
XSTB FUL
XNOR/STRB
FLSH ON
Charging operation
Charging
a capacitor
Q607
69
Q501
IC501
detector
Flash turns on
Voltage is detected from
the current IXR513
flowing through the photo
transistor.
the current IXR513
flowing through the photo
transistor.
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