Motherboard function test board

Abstract

The invention relates to a motherboard function test board, which can be used to test motherboard function on-line automatically and completely, wherein the invention comprises a VGA and AGP change circuit which can activate initial test through a trigger signal and realize the automatic switch between AGP and VGA through a signal automatic switch circuit; an Audio test circuit, which controls a CPLD Out0 and a CPLD Out2 signal and form test circuit with tested motherboard sound source to realize the test completely about the motherboard sound source circuit; a battery test circuit, which screens out the non-conforming article with lower electric quantity than the standard through the comparison between the tested motherboard battery and a battery standard; a Front Panel test circuit,which realizes the automatic control and test to shell type, hard disk display and power display of the tested motherboard, wherein the test result can be displayed in the video screen straightly.

Description

【Technical Field】 [0001] The invention relates to a main board function test device, in particular to a main board function test board that can comprehensively test multiple functions of the tested main board. 【technical background】 [0002] After the motherboard is assembled, it needs to go through a comprehensive functional test to determine whether it is a good product. The motherboard test is mainly for various errors on the motherboard, such as open circuit, short circuit, and incorrectly contacted parts, etc. The condition is detected by combining the error signal data generated by the testing machine and the wiring data generated by the computer-aided design of the motherboard to be tested, so that the maintenance personnel can quickly find the cause of the tested circuit board on the screen, thereby saving Time to repair defective products. [0003] The existing motherboard function tester inserts a motherboard to be tested on a test board, and then manually plugs and unp...

AI Technical Summary

Problems solved by technology

[0003] Existing motherboard function testing machine is to insert a motherboard to be tested on a test board, and then connect to the slot of the connector to be tested in a manual plugging and unplugging manner through a number of cables connected to the testing machine. and chip pins to guide the test signal out. However, there are usually many components on the motherboard to be tested, and it takes a lot of labor to plug and unplug the slots connected to the components and the wiring of the chip pins one by one. and time, and workers are prone to pinch their fingers due to fatigue or misuse during long-term operation

[0004] Later, the industry improved the above operation mode. The improvement method is to use a probe fixing board to connect the test signal of the motherboard components to be tested to an adapter board through a number of probes, and the adapter board is electrically connected to the test board. On the fixture, it can perform general tests on main components and interfaces such as CPU (central processing unit), hard disk and PCI (Peripheral Component Interface, peripheral device interface) slot on the motherboard to be tested, and about audio frequency test, power supply The testing of other components cannot be considered, and the poor quality of components such as audio and power supply will also affect the quality and yield of the entire motherboard, which will bring certain troubles to users. For example, if the voltage value of the power supply is lower than the standard voltage value, it will affect the setting of the CMOS value on the motherboard, resulting in failures such as failure to save the preset password value

Images