ZXC10-BTS (V5.4) Installation Manual
14-2
2. Unscrew 6 screws on the cover plate of the rack back and open it. According to
the cable labels on the back, check the cables for incorrect connections. Also
check the cables on the rack back for loose connections resulting from
loading/unloading, especially the internal cables between T1 cables, internal
connections of GPS and power cable plugs between power supply busbar on the
rack and the boards.
3. Check the DIP switches on the backplane for incorrect setting. According to
actual conditions, check the DIP switches on rear interface backplanes of the
shelves on the rack for incorrect setting. Refer to Appendix F “Description of
DIP Switches on the Backplane in a Base Station”.
14.2 Power-on Procedures
ZXC10-BTSB I2 is initially powered on as follows:
1. Keep boards partially seated in a shelf.
2. Make sure that the power switches of PSMD, PPM, PSMC, PSMB and HPA
inside a BTS rack and the fan layer are off.
3. Turn on the power supply outside the rack. If any abnormality is found, please
shut down the power supply immediately and check it. The rack will not be
powered on until the fault is removed.
4. Plug a PSMD power module into the voltage plane of the rack and turn on the
power switch of the power supply outside the rack. If any abnormality is found,
please immediately shut down the power supply and check it. The rack will not
be powered on until the fault is removed.
5. Turn on the general power switch on the power distribution module (PSMD) on
the rack voltage plane and observe the running of PSMD module. If the
indicator indicates the voltage of -48V, it shows that everything is normal. When
the fan is powered on, the PSMD front panel should give no alarm. If any
abnormality is found, please immediately shut down the power supply and check
it. The rack will not be powered on until the fault is removed.
6. Turn off the PSMD power module switch and plug in turn other power modules
into the rack voltage plane and the BDS layer.