Memory Chip Measurement method

a method of measuring memory chip with multimeter

In the motherboard and memory data pins are 64, d0-d63, in order to protect the memory of the data bits, in the d0-d63 of these 64 bits of data are added a resistor with a small resistance to the current limiting effect. The main principle of the tester is to use the program to repeat the test memory chip each data bit pin, to see if there is no breakdown or short circuit data position pin, there is the chip clock pin, address pin. So use the Multimeter test chip can also be used to test the method to measure, as long as the red pen to the ground, black pen measurement of the resistance, is the memory chip data bit of the resistance to determine which chip is broken, normal words each data bit resistance is the same. However, there is no tester so intuitive, this method can be used to measure the quality of the DDR memory chip.

　　The method of measuring memory chip with tester

According to the instructions, the measured memory in 2 A, 2B here, refers to one group and two groups of meaning. But the 16-bit chip has 8, and is quite two, and 8-bit chips have 16, which are equivalent to two groups.

2 A is the second group, 2B is the first group.

Measurements are cycled to test the data bits of each chip in each group. The general Test 3 times-5 times not bad is good. The good chip is: PA. A bad chip shows a bad bit of data on the pin.

1, boot skip test, generally have: chip short circuit, PCB board short circuit. The solution is to remove the chip and switch to a good PCB board to test the chip or bad.

2, Memory tester does not test D chip, D chip dispensable.

3, gold fingers burned words can not test, must be the chip removed to a good PCB board test chip good.