@mike1202 DUMP command is not exactly DUMP 🙂 but something different, i need to get home, where i have it on my computer.

@jim-frame You will need serial cable to computer, and some terminal emulation program ("teraterm", realterm, hyperterminal). I have analyzed the pro...

@andy-j ?ÿ comments like these wre not helpful 🙂 I am not surveyor, i bought it out of interest. I am software developer and electrical engineer

there is thread about battery replacement.

looks almost like internal battery dead ?

Good thing is that there is no calibration to be erased and you only loose firmware with data. Replace batteries and reload firmware and you are good ...

@bill-c Those are lithium thyonil batteries, voltage will not tell you the state of battery. I think they just have timer to go off when you need to ...

Can you please check your versions ? I have only done work on this firmware: Version 7.32 is compatible ONLY across the Maxwell Technologybased 4000...

i am located in Europe.

@jim-frame i will start new topic.

I have modified firmware of ashtech zmax to survive gps week rollover. I have also made this change for Zxtreme receiver and Trimble 4000sse. All thr...

No i am not talking about CU,?ÿ i am talking about the 5503 unit itself. If you open the side with servo knobs there are 2 boards. One board handles s...

@dave-webb were you able to repair this board ?