Siemens SINAMICS PERFECT HARMONY GH180 - Page 100

4. Prior to servicing any printed circuit board (PCB), ensure proper ESD protection is followed.
– All circuit boards shipped by Siemens are done so in an ESD protective bag. They must stay
inside this bag during transport and storage. They can only be removed after placing the
bag on a dissipative ESD workbench surface.
– Before removal from the ESD protective bag, the personnel handling the PCB must be
properly grounded. Proper grounding is accomplished by using a heel-grounder on a
dissipative 󹪞oor surface or a wrist strap connected to a proper ground.
Note
ESD sensitive components can be identi󹪝ed by symbols being present on the component
or the component packaging.
5. The System Interface Board and the User I/O Board are din-rail mounted within the respective
control tub.
Note
The customer speci󹪝c documentation shall be referenced to identify the location of the
System Interface Board or the User I/O Board.
Identify which board requires service and disconnect all connections to that speci󹪝c board.
The board may include 50-pin connectors, ribbon cables, a wire harness, and single control
wire connections.
Note
All control wire terminations require a 󹪞at-head screwdriver for removal.
6. Use a 󹪞at-head screwdriver to depress the two tabs on the board for removal of the PCB from
the din-rail.
7. Install the spare PCB on the din-rail.
8. Replace all of the removed connectors, ribbon cables, and wire harnesses.
9. Place the removed PCB into the empty ESD protective bag if the PCB is being returned to
Siemens for analysis.
Maintenance
10.7 Remove and Replace
Type 6SR5 Air-Cooled
98 Operating Instructions, AK, A5E39390112