Fluke 93 - Page 125

6-4
DISASSEMBUNG
THE SCOPEMETER
6.2.3 Removing the analog A2 PCS, to enable Hardware SCOPE Calibration
Adjustments
Referring to figure 6.2. use the following procedure to remove the analog A2 PC6.
1 . First open the ScopeMeter
{see Section 6.2.2).
2. The analog A2 PCB and top screening are secured to the bottom cover with two M3 Torx screws
(item 30). Use a Torx screwdriver to remove the screws.
3. Carefully lift the metal top screening, while pulling
It backwards.
4.
Pull
the battery wiring plug (Item
27,
figure
6.1
)
out of the connector on the analog A2 PCB.
5.
Use a Torx screwdriver to loos^ the two black screws (item 1
3)
(do not remove them) from the
input unit assembly. Now the analog A2 PCB can be lifted out of the bottom cover assembly.
6. The bottom
of the analog A2 PCd shows the components (potentiometers) used for hardware
calibration adjustments. The Hardware
SCOPE
Calibration
Adjustments
are
described in
section 5.6.1.
NOTE: The digital A 1 PCB and the metal shielding are stiil fixed to the top cover and must
be
connected
to
the
analog A2 PCB by the 3(Ppoie fiat cable.
CAUTION: Damage may occur rf you diaconnect the flat cable between
the two
printed
circuit boards withir) ten seconds after turning
off the Instrument. Damage may
also occur when the Analog unit (A2) is powered
when
not
connected to the
Digital unlt(A1).
6.2.4 Removing the digital A1 PCB.
1 . First open the Scope Meter (see Section 6.2.2).
NOTE: Note how the30-pole flat cad/e Is positioned in the connector it must be replaced in exactly
the same way
When the
ScopeMeter is opened, the blue mar1<s on the flat cable must be visible.
Carefully
Hft the upper part of the flat cable connector on the digital A1 PCB. This plastic clamp
must be lifted at both sides simuHaneously
to
unlock the flat
cable.
Now
pull the flat cable out of
the connector on the digital A1 PCB.
Do
not touch
the
flat
cable
ends!