Controller; Main Pba - Ricoh AC205 Service Manual

CONTROLLER

6.3 CONTROLLER

6.3.1 MAIN PBA

The Main PBA consists of the following components:
1 Image Processor
2 Processor ASIC
3 Flash Memory-Code
High
4 Flash Memory-Code
Low
5 Flash Memory-PCL6
High
6 Flash Memory-PCL6
Low
7 SDRAM
8 SDRAM
9 Modem
10 SRAM
The Engine Board and Controller Board are both on a single PBA and consist of
the following.
• CPU
• Printer scanner
• Line control functions
The CPU functions as the bus controller, I/O handler, motor driver, and PC inter-
face. The Main Board sends the image video data to the LSU and manages the
electrophotographic printing process.
Circuits on the PBA drive include the following:
• Main motor (paper feed, cartridge, fusing)
• Clutch driver
• Pre-Transfer Lamp driver
• Fusing lamp driver
• CCD driver
• Scan motor driver
• Modem
• Fan driver.
The signals from the Paper Feed Jam Sensor and Paper Empty Sensor are input
to the Main Board from the Power Supply PBA.
B273
11 Motor Driver
12 Motor Driver
13 USB
14 CMOS-Logic
15 CMOS-Logic
16 Panasonic
17 Varta
18 FPGA
19 A/D Convertible
20 USB Host
6-8
21 Line Transceiver
22 VEDIC X-TAL
23 CPU X-TAL
24 Modem X-TAL
25 USB host X-TAL
26 PS3 DIMM
27 RAM DIMM
28 Jack USB
29 Jack DIN
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