Xerox Phaser 3117 - Page 23

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Service Manual
System Overview
3-10
U6(Jupiter 4E)
- It is a main CPU and an Asic of Jupiter4E which has a CPU core CLK with over 150MHz and a System bus 45MHz.
- It use 3.3V for operation voltage and I/O, It uses 80MHz for system bus CLK,
SDRAM
- Main memory. SDCLK is 80Mhz.
A3977
- It is an Main motor driver IC and controls the motion of main motor.
Regulator
- It Supplies the core voltage to CPU by converting 3.3V to 1.3V.
EEPROM(U8 : 93C66)
- It is an EEPROM with 12C method.
SMPS connector(CN8)
- It connects SMPS, supplies the power, and delivers the high voltage contol signal, etc. If a harness is not normally
connected to this connector, power cannot be supplied.
LSU connector(CN12)
- It connects a LSU.
DC Motor connector(CN11)
- It connects an main motor and drive a DC motor.
HVPS connector(CN10)
- It connects a HVPS.
DCU connector(CN1)
- It interface a DCU-JIG
USB connector(CN6)
- It interface a the printer.