Siemens x300 Service Manual

 

SIEMENS X300 SERVICE MANUAL

I recently had the same problems with two X300 myself and managed to nd the problem. The problem is either with the SW, DC-DC Power Supply, RC or TI-board. 1. Reinstall/reload SW. If message sll appears, then 2. Measure testpoints for missing 12V. If missing, troubleshoot RC-board. 3. Measure testpoints for missing +-100V. If missing, take out TI-board and try again. If sll missing, it's most likely DC-DC Power Supply. I've the test point values below. Hope this is useful [Reference Number] [Title Test Point] [Value] [Tolerance] TP1 P2.5D +2.5V ± 5% TP2 P5D_PC +5.1V ± 5% TP3 P5.0D +5.0V ± 5% TP4 P3.3D +3.3V ± 5% TP5 M12D -12.0V ± 5% TP6 P12D +12.0V ± 5% TP7 P12D_PC +12.0V ± 5% TP8 PSRTRXVO 0 ~ 18.0V ± 5% TP9 M100HV -100.0V ± 5% TP10 P100HV +100.0V ± 5% TP11 M14AQ -14.2V ± 5% TP12 P14AQ +14.2V ± 5% TP13 M2AG -2.0V ± 5% TP14 P5AQ +5.0V ± 5% TP15 P3.3AQ +3.3V ± 5% TP16 GND NA TP17 P3.3A +3.3V ± 5% TP20 P5.0V-STBY +5.2V ± 0.5V