Table Of Contents - Panasonic JS-170FR Series Service Manual

1 OVERVIEW................................................................................................................................................ 1-1
General ........................................................................................................................................................ 1-1
System Configurations (Example)................................................................................................................ 1-1
Specifications ............................................................................................................................................... 1-2
Memory Map ................................................................................................................................................ 1-6
I/O Port Map................................................................................................................................................. 1-7
Interrupt Level .............................................................................................................................................. 1-8
Pin assignments........................................................................................................................................... 1-9
Appendix B : Dip Switches and Jumpers ................................................................................................... 1-16
2 Description of Operation ............................................................................................................................ 2-1
JS-170FR Block Diagram ............................................................................................................................ 2-1
Description of Main PCB Circuits ................................................................................................................. 2-2
2.1.1 CPU PENTIUM-II 266MHz or 333MHz (Refer to the page 4-1.) ................................................ 2-2
2.1.2 Chip set FW82443BX, FW82371EB (Refer to the page 4-1 and page 4-3.).............................. 2-2
2.1.2.1 FW82371EB Pin Assignment .................................................................................................. 2-3
2.1.2.2 RTC (Real Time Clock) circuit ................................................................................................. 2-9
2.1.2.3 IDE interface .......................................................................................................................... 2-10
2.1.2.4 USB interface......................................................................................................................... 2-12
2.1.3 Main RAM circuit....................................................................................................................... 2-13
2.1.4 BIOS ROM................................................................................................................................ 2-14
2.1.5 IT8673F circuit .......................................................................................................................... 2-15
2.1.5.1 IT8673F Pin Assignment ....................................................................................................... 2-16
2.1.5.2 Serial port (COM1, 2)............................................................................................................. 2-18
2.1.5.3 Parallel port interface circuit .................................................................................................. 2-20
2.1.5.4 FDD interface circuit .............................................................................................................. 2-21
2.1.5.5 Keyboard controller circuit ..................................................................................................... 2-23
2.1.5.6 PS/2 mouse controller circuit................................................................................................. 2-25
2.1.6 Serial port (COM3, 4)................................................................................................................ 2-26
2.1.7 VGA circuit (Refer to the page 4-4.) ......................................................................................... 2-28
2.1.7.1 SM710 Pin Assignment ......................................................................................................... 2-29
2.1.7.2 LCD interface circuit (Refer to the page 4-4.)........................................................................ 2-33
2.1.7.3 Back-Lite control circuit ......................................................................................................... 2-34
2.1.7.4 CRT interface ........................................................................................................................ 2-35
2.1.8 Piezoelectric buzzer circuit ....................................................................................................... 2-36
2.1.9 Hardware reset circuit............................................................................................................... 2-37
2.1.10 Clock......................................................................................................................................... 2-38
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