Ricoh AC205 Service Manual - Page 162

Controller, Main Pba, 3.1 Main Pba

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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 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 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 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 interface. 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 6-8 SM

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CONTROLLER
B273
6-8
SM
6.3 CONTROLLER
6.3.1 MAIN PBA
The Main PBA consists of the following components:
1
Image Processor
11
Motor Driver
21
Line Transceiver
2
Processor ASIC
12
Motor Driver
22
VEDIC X-TAL
3
Flash Memory-Code
High
13
USB
23
CPU X-TAL
4
Flash Memory-Code
Low
14
CMOS-Logic
24
Modem X-TAL
5
Flash Memory-PCL6
High
15
CMOS-Logic
25
USB host X-TAL
6
Flash Memory-PCL6
Low
16
Panasonic
26
PS3 DIMM
7
SDRAM
17
Varta
27
RAM DIMM
8
SDRAM
18
FPGA
28
Jack USB
9
Modem
19
A/D Convertible
29
Jack DIN
10
SRAM
20
USB Host
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.