Siemens Servo Screen 390, Service Manual, Page: 18 / 49

Servo Screen 390
18 E382 E394E 061 01 02 02
Siemens-Elema AB
3. Disassembly and assembly
3
General
This chapter describes disassembly and
assembly of some of the main parts of the
Servo Screen 390. The drawings in the
Spare parts list are also very useful as a
guide when disassembling and assembling
the Servo Screen 390.
Before disassembling or assembling the
Servo Screen 390, make sure that all
connection cables are disconnected from
the connection ports of Servo Screen
390.
After any service intervention in the
Servo Screen 390, perform a Functional
check according to instructions in the
Operating manual.
Handling PC boards
The PC boards contain components that are
highly sensitive to static electricity.
Those who come into contact with circuit
boards containing sensitive components
must take certain precautions to avoid
damaging the components (ESD protection).
When working with ESD sensitive
components, always use a grounded wrist
band and grounded work surface. Adequate
service tools must also be used.
PC boards (spare parts) must always be kept
in protective packaging for sensitive
electronic devices.
PC boards must not be
inserted or removed while
power is applied to the PC
boards.
Remove and insert the
PC boards very
carefully to avoid
damage to the
connectors.