Ricoh B286, Руководство по обслуживанию

Страница: 596 / 622

Electrical Components
B286/B289 6-88 SM
[A] Printer components:
1. Motors 4. Thermistors
2. Sensors 5. Solenoids: Separation, Paper Exit
3. Fan Motors 6. Clutches:
Here is a brief description of functions of the important boards:
MCU (Main Control Unit) . This is the engine control board. The MCU manages:
! Base engine control, scanning control, image processing control, image writing control.
! Basic I/O function control for the power packs, motors, sensors, solenoids, clutches,
and fusing.
! Power supply to scanner components (sensors, motors).
SIB (Scanner Interface Board) . Controls the operation of the CIS elements (x5) and does
the sub scan correction to compensate for their staggered arrangement. Also manages the
A/D conversion of the scanned image data.
IPU (Image Processing Unit) . Provided with five RI1001A_BGA components that do
every type of processing of the image data received from the SIB. LUPUS contains the
Rapi I/F functions. Also manages sending and receiving image data between itself and the
GW controller board.
MB (Mother Board) . Provides important relay functions 1) for the Rapi Bus I/F between the
IPU, GW controller, file format converter, and VLB, and 2) for machine power supply.
VDB (Video Drive Board). Controls operation of the LPH (LED Print Head), including the
conversion of video sent to the LPH.
GW controller (Type-Bz2) . Performs overall control of all multi-function peripheral (MFP)
devices.