Re: Looking for power supply schematic of Agilent 83751A
|
After 6 hours troubleshooting, it is fixed. The reason is C35 short. 100uF/50V electrolytic capacitor. Here is what I traced the partial schematic of HP83751A power supply.? ?After C35 short, the PWM controller does not drive the MOSFETs.? Also checked the ESR of C1, which is too much, 2 ohm, it will soon fail, just replaced with a new one. Regards Lin.
On Saturday, February 19, 2022, 03:03:07 PM EST, inlinebeginner via groups.io <inlinebeginner@...> wrote:
Hello
? Does anyone know where I can find the power supply schematic of Agilent 83751A or B (Synthesized Sweeper, 2 - 20 GHz) ?? I downloaded the service guide, it only contains block diagram (very helpful), but no detailed schematic. The power supply stopped working, I need to repair it.
? Symptom:? Could not power on. Rear panel 2 LEDs all off. Internal standby LED is on. Short A3W2 Pin 16 to ground, no response.
Thanks
Lin
|
