If you are having problems with your SR510 or SR530 you can call us at
If you wish to try and fix the problem yourself, the user manual may be useful, and the following troubleshooting guide may be helpful too.
1) Instrument is unresponsive to front-panel button presses
Try a power-up reset. Turn the power off, then while holding the REL (SR510) or LOCAL (SR530) key down, turn the power back on. After two seconds release the REL (SR510) or LOCAL (SR530) key. If this doesn't correct the problem the instrument will need to come back to SRS for service. Click here to get an RMA number.
2) Front-panel red overload LED is constantly lit
Most likely the front-end transistor of your
Take the top cover off your instrument and locate Q101. Look to see if you have a 2N6485 or an LSK389B in your instrument. If you have a 2N6485 you will need to order the
You can order the replacement part you need by clicking here.
3) Problems using National Instruments Measurement & Automation Explorer
Click here to download instructions on using National Instruments Measurement & Automation Explorer.
4) Can't send commands remotely over GPIB interface
A modification to the GPIB interface of the SR510 and SR530 was implemented in June 1991. A 270 pF capacitor was added between pin 10 (ground) and pin 17 (DAC) on the GPIB bus driver (part number 75161, adjacent to the MC68488 controller). If you have an old unit, check to see if there is a capacitor installed between pins 10 and 17 of the 75161 chip (located near the GPIB connector). If a 270 pF capacitor isn't soldered between these pins, you will need to install one before GPIB communication is possible.
5) I need a faster time constant than 1 ms
Click here to download instructions on modifying your instrument for a faster time constant.
If you are still having trouble your SR510 or SR530, your instrument will need to come back to SRS for service. Click here to get an RMA number.