Samsung CLP-510/XBH Service Manual page 31

Summary of Product
3) Memory Block
The operating program runs from memory (see below). It is used to store video data and printing
jobs from the host. Standard factory fitted memory is 64MB, and can be expanded using a DIMM
module mounted in the SODIMM connector. This is a user fit option, DIMMs from 64Mb - 256MB
can be used giving a total of up to 320MB of memory. DIMM modules are non standard - only
Samsung product should be used.
The memory controller is located in the SPGPm controls the SDRAM memory connected using a
32 bit 60 MHz bus.
4) ROM Block
An 8MB flash ROM is used to store the OS. The ROM controller is contained in the SPGPm
processor. When initializing after power on the contents of ROM are downloaded into memory and
the OS is run from within memory.
5) USB 2.0 Block
A Netchip Co. NET2270 is used to provide support for USB2.0 and is capable of interface speeds
up to 480Mbps. Under control of the SPGPm chip DMA is used to transfer incoming data directly
into memory.
6) IEEE 1284 Block - Korea, Russia and Asia Only
An IEEE 1284 controller is controlled directly by the SPGPm processor. ECP mode is supported.
7) Option Block
An Ethernet card can be attached using the 100 pin connector. It is connected directly to the
SPGPm processor and communicates using a 16bit bus.
8) OPE Panel
The OPE panel is controlled by a UART Block located in the SPGPm and it displays printer status
and helps the user to setup the printer. Various data is transferred using a serial interface between
a Mycom located in the OPE panel and the UART in the SPGPm.
9) Memory
There are two types of memory, program memory that uses flash and a working memory that uses
SDRAM. When printing working memory is used as band memory.
10) Sensor
Various sensors are used to detect various conditions during the printing process. These include
paper empty sensor, feed sensor, exit sensor, ITB sensor, etc.
11) Actuator Control
This section drives the various motors and clutches that are required for the paper feed and print-
ing process. These include DEVE cartridge clutches (4 off), Feed Regi clutch, DEVE solenoids (4
off), Pick solenoids (2 off), Duplex solenoid, ITB and T2 solenoids.
12) ADC
Recognize the current of T1/T2 roll, Recognize the fusing temperature, Recognize the Waste Toner
tank, Recognize the current of Waste agitator DC Motor,Recognize the OPC/ITM key, Recognize
the Developer(Y.M.C.K) key, Recognize the set temperature.
Service Manual
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Samsung Electronics