Circuit Operation Description; Sy-270 Board, Mec-11 Board Circuit Operation Description - Sony UP-D70XR Service Manual

4-1. SY-270 Board, MEC-11 Board Circuit Operation Description

SY-270 board is composed by system control block and mechanism control block and thermal head
control block. These each block processes or controls following items.
. System control section
program transmission to each circuit board
transmission control between each circuit boards
control of key
LCD indication
. Mechanism control section
control of each motor
process of each sensor
. Thermal head control section
gamma correction
head voltage control
data transmission from memory
picture quality correction (PQC IC)
head data transmission
MEC-11 board is composed by drive IC of each motor, sensor detection circuit, sensor LED control
circuit and EEPROM.
UP-D70XR
Section 4

Circuit Operation Description

4-1