the motor contacts (3 pin) is soldered directly to the board. it is connected properly. and i measure it with ohmmeter. its ok. then i put plastic material to the other contacts and screwe the pcb on hdd body. then i connect power and communication cable to power supply and rs232 port with converter. opened hyperterminal and turn on power supply. type Ctrl + Z and it shows F3 T> typed /2 and enter it shows F3 2> wait more than 30 second type Z and press enter it shows LED:000000CE FAddr:00280481 LED:000000CE FAddr:00280481 and they don't stop the disk ((((