Epson AcuLaser CX-11N/AcuLaser CX-11NF Field Repair Guide 9/9/05
Printer Component, Software Item, LCD Display, Printer Button Page 27.
CIRCUIT BOARDS AND THEIR FUNCTIONS
Printer Circuit Boards
PWBA MCU (PPL Ref # 12-02-01)
PWBA MCU is the Print Engine Controller. It performs communication with the printer controller (PWBA ESS /Main
Logic Board) and controls the components used to perform printing operations.
LV/HVPS (PPL Ref # 12-02-03)
LV/HVPS generates +24 VDC, + 5VDC and +3.3 VDC throughout the printer and generates the high voltage required
for transferring toner throughout the print process and discharging the OPC Drum.
PWBA HVPS (PPL Ref # 12-01-09)
PWBA HVPS supplies high voltage to the IBT Cleaner, 2nd BTR, and Cleaning Sheet.
PWB ASSY ROT (PPL Ref # 12-01-10)
PWB ASSY ROT creates the drive for the motors based on input signals from the PWBA MCU and supplies the
pulse signal to the motors.
PWBA ESS (PPL Ref # 12-02-07)
PWBA ESS is the Main Logic Board. It converts print data transmitted via an I/O port (network, USB, parallel port,
etc.) and communicates with a host computer. The memory can be expanded up to 512 MB with an optionally avail-
able additional memory.
PWBA Fuser Control (PPL Ref # 12-02-12)
Provides AC Power to the fuser. Also contains the main AC input fuse and AC filter circuits for the power supplies.
OP PANEL (PPL Ref # 01-01-17)
OP PANEL displays the printer status on the LCD or by LEDs. Printer operations are performed by depressing the
buttons on the OP PANEL.
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