Gymna Pulson 330, Руководство по обслуживанию

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17. Replacement procedures.
17.1 Bottom plate.
Removal:
Switch off the unit and remove the mains cable from the
mains entrance.
Put the unit upside down and remove the screws .
The bottom plate can now be removed by putting a small
screwdriver under the bottom plate.
Installation: Same but in reverse order.
Caution:
Do not forget to connect the earth cable between the unit
and the bottom
plate before closing the unit.
17.2 Main PC board (ELUL 004-L100-V20).
Removal:
Disconnect the mains cable ( CON 1 and CON 2 ).
Disconnect the flatcable from CON 10 ( which connects the US
board with the
main board ).
Disconnect the flatcable from CON 4 ( connection with keyboard
).
Remove all screws and take out the board.
Installation: Same but in reverse order.
Caution: Be sure you make the right connection between main board and
the display
print ( black connector on the backside of the main board ).
17.3 Ultrasound PC board (ELUL 004-L300-V30).
Removal:
Disconnect the mains cable ( CON 1 and CON 2 ).
Disconnect the flatcable from CON 10 ( which connects the US
board with the
main board ).
Disconnect the flatcable from CON 4 ( connection with keyboard
).
Remove all screws and take out the board.
Installation: Same but in reverse order.
Caution:
Be sure you make the right connection between main board
and the display
print ( black connector on the backside of the main board ).
17.4 Display PCB (ELUL 004-L400-V20).
Removal:
The ultrasound board is placed in a metal box to minimise
magnetic radiation.
First remove screws between the US board and the main board. (
at CON 10 ).
To open this unit , remove the three screws from the side
panel on which this
box is mounted. The box can be opened on the bottom side.
Desolder the bottom plate to open the unit.
Disconnect the output connectors ( CON 1 and CON 2 ).
Unscrew CON 8 from the box and remove the screws from U1, Q2
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