Fluke 93 - Page 174

7 -4fi
CORRECTIVE MAINTENANCE
7.2. 5.6 Input unit assembly replacement
Figure 7. 14 Irput unit
assembly
Referring to figure 7.14.
use the foilowing procedure for Input unH assembly replaoOTeni.
1 . Remove the front cover
assembly.
2
.
Disassembl
e the bottom cove r assembly.
3. Remove the
30-pole flat cable.
4. Unsolder the wiring (6x) of the input terminals
from the analog A2 PCB.
5- The input unit assembly Is clamped onto the
analog A2 PCB. Loosen these clamps and pull
the
input unit assembly from the analog
A2 PCB.
NOTE: The white
gaskets on the input terminals (4x) are sealed to,
and must
remain
with the input
unit assembly. Do not
damage the gaskets and do not separate
them from the Input unit
assembly. Correctly
fitted gaskets assure the sealing of the
ScopeMeter.
6. Reinstall the front unit assembly.
7. 2. 5.
7
Top
cover assembly replacement.
Referring to figure 7.12. use the following procedure for
top cover assembly replacement.
1 . Remove i^e bottom cover
assembly.
2. Remove the 30-pole fiat cable.
3. The digital
A1 PCB and metal screening are secured
to the lop cover with four M3 Torx screws
(Item
33). Two of these screws contain standoffs, be sure to
put
them
on the
right
place again.
Use a Torx screwdriver
to remove the screws.
4. Remove
the metal A1 screening from digital At PCB.
5. Lift
the
digital
A1 PCB out of the top cover. Be careful
not to damage the infrared LED and
phototranslstor of the optical Interlace.