16
Subject to change without notice
4 Locate the long ribbon cable connecting the FC and the
YP board. Remove the glue (transport protection) from the
connector “B”, use a screwdriver as a lever and position it
in the gap to press the connector out while slightly pulling
at the ribbon cable.
Note!
Pulling at the ribbon cable or using a screwdriver at the
edges marked “X” may damage the plug.
5 Remove the short ribbon cable plug from the socket on the
TB board.
– Release the front panel mounting points on one side, using
a screwdriver as a lever.
– Turn the oscilloscope and release the front panel mounting
points as before.
– Carefully pull off the front panel.
6 Remove the 4 screws marked “C”.
7 Unsolder the trace rotation coil wires marked “D” and keep
the colour allocation in mind.
Attention!
Do not unscrew the 4 screws marked “X” in fi g. 9!
8 Replace the FC board and follow the previous instructions
in opposite order.
Note!
Before inserting the variable knobs shafts, check that
the potentiometers are in calibrated detent position. The-
reafter insert the shafts completely and turn the variable
knobs clockwise until the arrow symbols point to the
right. Then fasten the shafts using the hexagon sockets
accessible in this position. Turn the variable knobs counter
clockwise (ccw) until the unfastened hexagon sockets can
be fastened.
9 Connect power cable to the oscilloscope and switch it on.
10 Due to tolerances of the potentiometers please follow the
instructions of the Adjustment Procedure HM303-6 in the
following order (item):
B o a r d R e p l a c e m e n t
5
6
7
8
9
