Hard disk hardware failure type and maintenance when hard disk data recovery
Das data recovery In the hard disk data recovery process, there are often hard disk logic failures and hardware failures. Let's talk about the common hardware failure types and maintenance in hard disk data recovery. First, the motor does not turn For the phenomenon that the motor does not turn around, it is usually the breakdown diode breakdown on the 12V line. The LM324 or LM393 integrated operational amplifier (also known as the low offset voltage comparator) is damaged, and the motor drive chip is damaged. The motor driver chip generates the output voltage of 7-8V to the motor by controlling the input voltage of 12V. If the Zener diode on the 12V line breaks down, the power supply is abnormal, and the motor can not work normally. Replace the Zener diode. . The LM393 on the hard disk board and its function box. The operating voltage Vcc of the LM393 is 5V, and the output voltage is 3.25V. The secondary output voltage is mainly to supply power to the motor driver chip. If the voltage is abnormal, the motor driver chip will not work. If the operating voltage of the LM393 is normal and the output voltage is abnormal, it is suspected that the chip is damaged and can be soldered and replaced with a good retest. Damage to the motor drive chip will cause the spindle motor and voice coil motor to not work properly. The motor drive chip that Seagate hard drive is more susceptible to damage is 23400278 and SH6950D. In addition to measuring the input and output voltage of the motor driver chip to determine whether it is damaged, you can also confirm the ground resistance of each pin to confirm. Second, the hard disk abnormal sound The abnormal sound of Seagate hard disk is mainly caused by the following reasons: The head is damaged; The fuse resistor on the head power supply line is damaged; 2P102 FET is damaged; Abnormal noise can also occur when the motor drive chip is not well cooled. This is now common on motor drive chips. First, touch the motor drive chip to overheat, then check the fuse resistor on the power supply line of the head to check whether it is damaged, and whether the FET is damaged. If there is no problem, the possibility of damage to the head is large. Canvas bag has large capacity and it's very convenient for daily commuting. Canvas bag has so many divers patterns, customers can use it not only for students and office workers, but also for groceries and shopping. Canvas bag use a casual style which can be public adopt.
Canvas Bag,Canvas Backpack,Canvas Tote Bags,Canvas Messenger Bag Jilin Y.F. Import & Export Co.,Ltd , https://www.jlyoufoundit.com
