Hi
Sorry for extensive topic message but it is important for detailed description of my problem.
I have got CMU 200 with PC from CRTU FMR6 (Pentium 933 MHz) with basic configuration (only B11 OCXO installed). Bios is CRTU-RU v0.91 and BASE v5.21. Two weeks ago I have got problem with cycling on and off so I disassemble machine and measure. Problem was on membrane (power switch pin has electric leakage with another) and that was reason why machine powering on and off. I interrupt this connection on membrane connector and solder paralel 2 wires for switch to pins on PC board. I disconnect also CMOS battery because I dont want to solder to board with voltage. Then a install battery back and try to power on machine. Problem with on and off disappear but appear a new problem. Machine power up I press F1 for default CMOS parameters then machine boots up and looks like OK. After 3 min appear an error message : "Temperature measurement aborted !" FANs goes to max RPM ant after clicking ENTER it drops to MSDOS. After restarting situations repeat with same symptoms (3min ok, error, fan max...) so after boots up I have about 3 mins to trying anything. I try measure spectrum it looks OK, I try to start rf generator and also it is ok, Power meter OK but after 3 mins error stop the program. I try to make selftests and there are some errors. Eeprom reading of all boards are OK but measured voltages, temperatures, NETCLKs etc. has only INVALID value on all parameters on DIGI board and also on FE board. When I try to selftest REF board eeprom is ok but after eeprom OK value appear error window with message : "Unsyncs recalibs not supported" and machine must be restarted. When I try to selftest RXTX board there are no problems eeprom ok also measured parameters (temp voltages...) are OK too (no red or invalid). When I try to test RFloops also it is OK. I disasemble it again and inspect for any short circuit or damaged connector pins but nothing found. I try to update firmware, reinstall base, downgrad base to older also I try to format HDD and reinstall a new SW but still same problem. Only what I not try is flash bios from CRTU v 0.91 to CMU 200 because I dont know where to download it for FMR6 P933MHz. But I thing it is not reason because bios was same before this issue appear and it works. Only what I do was change battery from CMOS but I click to default CRTU. Maybe on CMU bios there are another default setting.
I thing problem looks like there is problem only on diagnostic parameters because main measuring parameters are OK. I think this is reason why error temperature measuring aborted appear because main SW havent info about temperature of machine. Also when I run FM calibration it looks OK but when I look better there are temperature 0 on all parameters. But on service manual there are little informations about procedure of selftest parameters so I dont know how it works if there is special bus for this or why RXTX board measuring selftest good but other boards INVALID values. On manual is information the DIGI board has AD converter for diagnostic parameters of CMU boards monitoring but whu RXTX has good parametrrs and DIG and FE and REF has problem.
Any idea where could be a problem ? Is there any information with scheme of mainboard and other boards connections ? Have anybody CMU200 FMR6 bios dump file please ?
Thanx for any ideas. I dont know what to do next.
OM4IK Igor
PS: I also measure all PSU voltages on mainboard pads near green leds and also 5V reference but all OK. Also checked coaxial connection between all boards with no problems.