HP ml 1640, ml 2240, ml 2241, ml 2245 Diagram

ML-2240 & ML-2245 & ML-1640 Series training

February 2008

Agenda

1. Overview

2. Block & Connection Diagram

3. Schematic – Key concept

4. Cover Open Sensing

5. Q&A

Ⅰ. Introduction

1-1. Overview(ML–2240 & ML-2245)

SMPS

HVPS

Main Board

Waste Sensor (Only ML-2245)

Ⅰ. Introduction

1-2. Overview(ML–1640)

SMPS

HVPS

Main Board

Ⅰ. Introduction

2. Block & Connection Diagram of ML-2240 & 2245

Ⅰ. Introduction

2-2. Block Diagram of ML-1640

Ⅰ. Introduction

3. Schematic - Key Concepts 3-1. Main PBA – 1(ML-2240&2245)

Main Clock and SSCG

¾ SSCG means Spread Spectrum Clock Generator ¾ Apply SSCG(Spread Spectrum Clock Generator) on the Main Clock. ¾ Main Clock frequency is 12MHz and Video Clock is 14.75MHz. ¾ CPU makes video clock using internal PLL block. ¾ It doesn’t need extra Oscillator for video clock.

Ⅰ. Introduction

3-1. Main PBA – 2(ML-2240&2245)

CPU – Jupiter4e

¾ Jupiter4e is developed using ARM940T 32Bit RISC embedded processor core. ¾ 1.8V internal, 3.3V external(I/O boundary) Voltage used. ¾ Image processor included(GDI only). ¾ On-Chip clock genarator with internal PLL. ¾ Operating frequency is 75MHz ( converting 10MHz main clock to 75MHz operating

clock using internal PLL )

¾ It has Built in Flash Memory : 4MBits (128Kx32bits) ¾ 4Mbit is 0.5MByte. It is small capacity. So we can not store many function in it.

Ⅰ. Introduction

3-1. Main PBA – 3(ML-2240&2245)

SDRAM – 8MB * 1ea

¾ SDRAM(Max operating frequency : 133MHz) used and SDRAM has

8MByte memory capacity.

¾ SDRAM operates 75MHz which is the same as CPU’s operating

frequency.

¾ F/W program code had been stored in the Built-in Flash Memory

when Main PBA assembled , and the program code can be upgraded by user.

¾ When upgrading F/W, never turn off the power until completing

upgrade process.

¾ If user turn off the power while upgrading F/W, the program code

will be conflicted and the machine will not work.

¾ If above situation occurs, replace the Main PBA. ¾ After downloading, set automatically conduct power off/on.

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