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It is now possible to retract the
small Support PCB and the Power
PCB from the instrument. The
small Support PCB is only found in
the early models of ATC-155 A/B.
ATC-250/320/650 A/B
Disconnect the cables on the
Power PCB. Leave the one that
connects the Power PCB to the
Display Unit.
It is now possible to retract the
Power PCB from the instrument (a
small support PCB as described in
section D is also found in the early
models of the ATC-320/650 A/B).
ATC-125 A/B
Loosen the 2 screws in the bottom
of the instrument.
Disconnect the cables on the
Power PCB.
If the PCB still is stuck, it can be
necessary to loosen the big Torx
screws in the bottom of the
instrument.