Service manual

EPL-5700L/5700i Revision A
OPERATING PRINCIPLES ELECTRIC CIRCUIT 24
Table 2-1. C292 Main Board - Main Controller
Name Location Functions
CPU
TM95C001
IC1
16bit CISC-CPU driven at clock frequency
25MHz.
Package: 64pin, QFP
Power supply voltage: 5V Single
ASIC (SCL)
E05B68NB
IC5
This ASIC controls the following:
• Memory (RAM/ROM)
• DMA (Video, I/O)
• RIT (Resolution Improvement Tech.) / PGI
(Photo Grade Improvement) function.
• Video I/F (communication with the Engine
Controller)
• Panel LED
Package: 208 pin, QFP
Power supply voltage: 5V/3.3V
Operation frequency: DMAC max 25MHz
PIF max 25MHz
DCMP max 60MHz
RIT max 100MHz
ASIC (TUSB)
E05B69NA
IC21
Controls USB I/F.
Package: 64 pin, QFP
Power supply voltage: 5V/3.3V
Operation frequency: max 48MHz
TTL
SN74LV162184DGGR
IC7
1284 driver. Receives / sends parallel I/F
signal.
Power supply voltage: 5V
DRAM
M5M418165CJ-6
IC3
One EDO with 16Mb, 16bit, 60ns is mounted.
Operates as standard memory.
ROM
HN27C4000G-10
IC2
4Mb, 16bit, and 40pin module. Stores the
control program.
RAMSIMM CN1 72 pin, memory expansion connector
USB I/F CH5 USB connector with the host PC
Parallel I/F CH2 Parallel connector with the host PC
Control Panel I/F CN4 LED-control connector
Table 2-2. C292 Main Board - Engine Controller
Name Location Functions
CPU
M38073E4FS
IC201 Controls the engine.
Motor Drive IC
TEA3718SDP
IC204/
IC205
Drives the main motor.
Table 2-1. C292 Main Board - Main Controller (continued)
Name Location Functions