C413 Main/B Board; Main Elements - Epson Stylus C40UX Service Manual

Stylus C40UX/C40SX/C20UX/C20SX

2.2.2 C413 MAIN/B Board

The printer mechanism is controlled by C413MAIN. On this MAIN board, 3.3V
regulator IC is not mounted and all IC is driven with 5.0 V.
See Figure for the C413 MAIN/B board block diagram.
Address
PROM 4M D-RAM 1M
(IC6) Data (IC5)
E01A24CA
CPU (IC1)
CR1
Common Driver
Common Driver
Figure 2-21. Block Diagram for the (C413 MAIN/B) Board
Following shows you the major characteristic of this main board.
Timer IC & Lithium battery are not mounted
Unlike the previous products, the Timer IC and the Lithium battery are not
mounted on the Main board. So, this product perform the Power-on cleaning or
Timer cleaning based on the time command which is sent from the printer driver.
As for the detail, refer to the 2.1.7 Ink Sequence.
D-RAM
1Mbit D-RAM is mounted on the Main board.
One CPU controls the all function on the main board.
Operating Principles
Reset IC
(IC2)
EEPROM
(IC3)
CN4
CN12
CR Motor
Motor Driver
+5V
(IC10)
CN7 PF Motor
Q2 & Q3 CN9
(IC9)
CN7 Parallel I/F (C413MAIN-B)
(IC7)
CN3 USB (C413MAIN)
Electrical Circuit Operating Principles

2.2.2.1 Main elements

Table 2-8 shows the function of the each main elements on C413MAIN.
IC
ASIC
E01A24NA
PROM
RAM
AT93C46
HP/PE/IC Sensor
BH6150F-E2
Head
E09A39RA
XC901503FNR2 IC10
74LVX161284
Table 2-8. Main Elements
Location Function
16bit CPU mounted on the MAIN board is driven by
IC1
clock frequency 24MHz and controls the printer.
• Capacity 4MB, Bus= 16 bit
IC6
• Program for CPU
IC5 Bus= 16 bit, 1Mbit DRAM
1kbit EEPROM
IC3 • Default value setting
• Parameter backup
Reset IC
IC2 • For +5V; reset when +4.2V is detected
• For +36V, reset when +29.2 is detected
Head drive control HIC
IC9
• Generates head common voltage.
• CR motor driver
• PF motor driver
• +5V regulator
IC7 IEEE1284 parallel I/F transceiver IC.
Revision B
43