| Electronics > Repair |
| Oscilloscope is in a boot lock |
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| LoveLaika:
I have a Tektronix TBS-1072B oscilloscope. I don't know how it got into this state, but it's in some sort of boot lock state, if that's the right term. I turn it on by pressing the power switch. Some buttons light up and the display shows up, I see the Tektronix name and logo, and an image pops up showing the model name. Then, the screen goes dark, and the process repeats again...and again. Essentially, it's stuck in some boot sequence on startup and it won't properly initialize. Does anyone know how to perhaps factory reset this oscilloscope? Or perhaps, any one know of a way to perhaps get some sort of start-up log from it as it boots up to see why it's like this (like through a serial port or something)? |
| djsb:
Maybe there is an internal CMOS battery that needs replacing? Just guessing. |
| LoveLaika:
Thanks for your thoughts. Opening it up, I found the CMOS battery on the side of the main board, but it looks fine. Measuring it, it reads 3 volts, the correct voltage for a CR2032 BR2325 battery. For what it's worth, I found the service manual for the device, but it doesn't really help much with this situation. EDIT: Sorry, wrong battery type. |
| djsb:
Is there a procedure for updating the firmware? Have you tried removing the battery and then starting the scope without the battery installed, and then replacing it and trying again? Done at your own risk, of course. How about disconnecting, applying switch lubricant and the reconnecting all the connectors? |
| perieanuo:
hi, if you wanna remove the battery, save before what's kept in the memory, you won't find that data easily. normally, you should get the debug comm port, solder some ftdi to tx/rx and see what's in the start-up log first see similar https://forum.tek.com/viewtopic.php?t=137905 |
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