Circuit Operations - Casio QV-10A Service Manual & Parts List

CAMERA UNIT (CAMERA PCB)
The camera unit is composed a lens, color filter, CCD (IC802), driver (IC800) and signal
processor (IC802). It produces voltages R, B, and G, for the colors red, blue, and green
when light from a scene is focused on the surface. These voltage values vary according
to the intensity of the respective color being scanned.
The camera unit must be replaced with whole unit when it is defective, because the precise
adjustment is required when the individual parts are replaced, and can be done only at our
factory.
Camera PCB
1 Lens
3
IC802 (CCD)
2 Color
Filter
1 Lens
Concentrates light rays to a point.
2 Color filter
The striped color filter in front of the CCD detector is used to provide color information.
It has three colors, yellow, green and cyan.
Array of color filter and signal processing (IC801) for camera are extremely close relationship.
1 2 3 ~ 506 507 508
Ye G Cy Ye G Cy
Ye G Cy Ye G Cy
Ye G Cy Ye G Cy
Ye G Cy Ye G Cy
Ye G Cy Ye G Cy
Array of color filter

CIRCUIT OPERATIONS

4
IC801
Ye,Cy,Gr
color signal
Sample Hold,
AGC
CCD IN
PHI1~PHI4
PHS1~PHS4
IC800
Driver
Timing
VI1~ VI4
Generator
VS1 ~ VS4
Ye=Red+Green
8bit A/D
Converter
Red
Mg=Blue+Red
Ye
Mg
White
Cy
Green
Blue
Cy=Blue+Green
Three Primary colors
— 3 —
Digital PCB
Data Bus
D0 ~ D7
CPU
MCK,
HRS2,
FTTRG,
STTRG,
CCODE,
ENDFLG
D RAM