Ccd Board - Kyocera KM-1500 Service Manual

2DC

2-3-6 CCD board

The CCD board consists mainly of a CCD sensor (U4) that scans an original. The CCD sensor (U4) is driven to scan an
original by the CCD sensor control signals (CCDCLKN, SH_BW, SH_RGB, SW, SWN, CPN, and RSN) based on the clock
for driving the CCD sensor (CCDCLK) supplied from the main board through the scanner board.
The image signals obtained from scanning of an original are divided into three analog signals (CCDR2, CCDG2, and
CCDB2) for output. These signals are current-amplified by the amplification circuit that consists of transistors (TR1 to TR6),
operational amplifiers (U6 and U7), and so on and transmitted to the analog signal processing circuit on the main board
through the scanner board.
Also the CCD board relays signal lines of the scanner home position sensor and the exposure lamp.
Original
Exposure
lamp
Inverter board
Scanner home
position sensor
2-3-12
CCD board
Transistors (TR1, 2, 3, 4, 5, 6)
OP-AMPs (U6, 7)
CCD
sensor
(U4)
Drivers (U2, 3, 5)
Figure 2-3-11 CCD board circuit block diagram
Scanner board
CCDR2
CCDG2
CCDB2
CCDCLK
CCDCLKN
SW
SWN
SH_BW
SH_RGB
CPN
RSN
Main board
Engine board