Sony UP55MD, Service Manual

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5-4
UP-55MD
Print
Print is made in the order of yellow (Y), magenta (M), and cyan (C). SOC (IC103) sends the image data
stored in SDRAM to an internal coprocessor. The coprocessor performs image processing, such as
gamma, masking, sharpness, and thermal storage correction, to the sent data. This operation is done
during print. Data is transferred to a printer-dedicated circuit (IC301) one line at a time while creating the
one-plane final print image of Y, M, or C to be printed. IC301 converts the received data into a PWM
signal, and then transfers it to the thermal head and prints an image in print paper.
Infrared remote controller
The SIRCS data received on the DP-407 board is input to IC103 via the wired remote control terminal on
the IF-990 board. Data is received by the software processing based on interrupt.
REMOTE2 remote controller
Data is input from the IF-990 board to IC103. It is received by software.
RS-232C
Data is sent and received using UART of SOC (IC103) by software control. A DC voltage level is
converted using RS-232C interfaces IC908 and IC909.
USB host port
This USB host port corresponds to a mass storage class for the connection of a USB flash memory device.
A print image is JPEG-compressed using IC1101, received as data through an SOC (IC10) CCD interface
during actual print, and written in a USB flash memory device. The USB flash memory device is used for
only the write operation of image data. It does not have a function that prints the read image. The USB
flash memory device is connected from the USB port of SOC (IC103) to the USB terminal on the IF-988
board. When the USB flash memory device is connected to a printer, CPU detects the potential of VBUS
and generates an interrupt. A dedicated file folder (\SONY\PRINTER\IMAGES) for image saving is
searched when a device is recognized. Preparations for image write can be made when a file is
recognized. A file folder is created if it does not exist.
Memory Stick port
The Memory Stick port of SOC (IC103) is provided for separate upgrading. Firmware is written using
this port when upgrading was not completed because the power was turned off during ordinary upgrading
from a menu.
The Memory Stick mounted on the front panel of products is connected to IC1101. IC103 is designed to
be upgraded via IC1101 during ordinary upgrading from a menu. To use this port directly connected to
IC103, reconnect FFC, connected to CN1458 on the IF-988 board, to CN905. (Refer to Section 2-5 for
upgrading.)
Real time clock/EEPROM control
A real time clock IC (IC501 on the KY-582 board) for an internal clock and EEPROM (IC115) for saving
various setting values are connected through an I
2
C bus using a general-purpose port of SOC (IC103).
General-purpose I/O ports
Signal connection at each I/O port of SOC (IC103)
Pin No. Pin Name Name I/O Description
198 GIO0 INT0 I Stepping motor interrupt
197 GIO1 INT1 I Sensor interrupt of AD connection