Singapura
Member level 3
backdrive test
Can anyone advice or point me to websites that teaches how to test in-circuit tester's backdrive circuitry. I am experiencing false failures while testing certain PCBs even after replacing the called out ICs, but when I run self-test on the tester there was no problem.
I suspect that the driver circuits of the tester can no longer backdrive as well as it used to. The backdrive specifications are:
Logic High source current: 500mA
Logic Low sink current: 300mA
Any suggestion is greatly appreciated. Thanks!
Can anyone advice or point me to websites that teaches how to test in-circuit tester's backdrive circuitry. I am experiencing false failures while testing certain PCBs even after replacing the called out ICs, but when I run self-test on the tester there was no problem.
I suspect that the driver circuits of the tester can no longer backdrive as well as it used to. The backdrive specifications are:
Logic High source current: 500mA
Logic Low sink current: 300mA
Any suggestion is greatly appreciated. Thanks!