Siemens siprotec 7SA522 User Manual page 507

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7SA522 Manual
C53000-G1176-C119-2
Caution!
Electrostatic discharges through the connections of the components, wiring, and con-
nectors must be avoided. Wearing a grounded wrist strap is preferred; otherwise,
touch a grounded metal part before handling the internal components.
Warning!
Hazardous voltages may exist in the device, even after the power supply is discon-
nected and the boards are withdrawn from the case! Capacitors can still be charged!
Carefully pull off the front panel and bend it aside. The front panel is connected to the
internal CPU printed circuit board with a short ribbon-cable.
Disconnect the ribbon-cable that links the front panel and the CPU board (å), at the
side of the front panel. To disconnect the cable, push up on the top latch of the plug
connector and push down on the bottom latch of the plug connector. Carefully set
aside the front panel.
The battery is located on the bottom-front side of the CPU (þ) board. See Figure 9-1.
Slot 5 Slot 19
þ À
Figure 9-1 Front view without front panel
duced)
Remove the old battery from the snap-on connector using the plastic battery grip
shown in Figure 9-1.
Remove the battery grip from the old battery, and place the grip on the new battery.
Routine Checks and Maintenance
Battery
þ
Processor board CPU
À
Input/output board I/O
–
position of buffer battery (simplified and re-
Battery grip
G1
9-5