14
Subject to change without notice
B o a r d R e p l a c e m e n t
Preliminary note!
Although all PCBs have been tested by HAMEG, adjustment is
required after replacement, due to unavoidable tolerances.
PS Board
1 Before removing the PS board, check that the power cable
is not connected to the oscilloscope.
2 Remove the power rod from the power switch.
3 Press connector “A” and pull the ribbon cable (out).
4 Press connector “B” and pull the ribbon cable (out).
5 Remove the 5 screws marked “C” and remove the protection
(screening) shield.
6 Press connector “D” and pull the ribbon cable (out).
7 Remove the 3 nuts marked “E”.
Attention!
Do not unscrew the 3 screws marked “X” in fi g. 1.5!
8 Remove screw and nut marked “F” (fi g. 4 and 5).
Attention!
This screw connects the protective ground line with the
chassis.
After insertion of the new PS board, fi rstly this screw
must be used to connect the protective ground line with
the chassis. A secure connection must be made, which
can only broken by using a tool!
9 Replace the PS board and check that the isolation plate
between the PS board soldering side and the rear chassis
is still present. Then follow the previous instructions in
Board Replacement
1
2
3
4
5
PE
