M537

{ Data from M537 manual }

Keyboard Connector
Pin Description
1 Keyboard Clock
2 Keyboard Data
3 N.C.
4 Ground
5 + 5VDC

Power Supply Connectors
Pin Description Pin Description
1 Power Good 7 Ground
2 + 5V DC 8 Ground
3 + 12V DC 9 - 5V DC
4 - 12V DC 10 + 5V DC
5 Ground 11 + 5 V DC
6 Ground 12 + 5V DC

M537 Mainboard

CMOS RAM Discharge Jumper

DIMM Moduile Voltage Selector

J3: RST (Reset Switch Connector)
Setting Description
Open Normal Mode
Short Reset System

J3: KEYLOCK (Keylock & Power LED Connector)
Pin Description
1 LED Output
2 N.C.
3 Ground
4 Keylock
5 Ground

J3 TB LED (Turbo LED Connector)
Pin Description
1 Anode(+)
2 Cathode(-), Ground

J3 SPK (Speaker Connector)
Pin Description
1 DATA Out
2 N.C.
3 Ground
4 + 5V

J3 HDD LED (Hard Disk LED Connector)
Pin Description
1 5V
2 Active Low

CPU Speed Jumpers

CPU Internal Clock Speed Jumpers

Flash ROM Voltage Jumper

JP6-A, B, C, D:CPU Voltage Regulator Output

PS1: PS/2 Mouse Connector
Pin Description
1 Mouse Data
2 N.C.
3 Ground
4 +5V
5 Mouse CLK
6 N.C.

USB1: 2 Sets of Universal Serial Bus Connector
Pin Description
1,2 +5 VDC
3,4 Data -
5,6 Data +
7,8 Ground
9,10 Ground

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