Fluke 225C Service Manual - Page 20

Main PCA Unit Parts, See Table 3-2 and for the main PCA Unit parts.

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Fluke 19xB-19xC-2x5C Service Manual 3.4 Main PCA Unit Parts See Table 3-2 and Figure 3-2 for the main PCA Unit parts. Table 3-2. Main PCA Unit Parts Item 1 2 3 4 5 6 7 8 9 10 Description Shielding box assy (includes rubber spacer, see fig. 8-5) Insulation foil PT-Screw K35x8 Input connector unit Sealing ring for power connector Input attenuator shielding: - METER channel top - METER channel bottom - SCOPE channel A top - SCOPE channel B top - SCOPE channel A&B bottom Screw Torx M3x20 Shielding cover Combi-screw Torx M3x10 (screw + split spring) Hexagonal spacer M3x16.5 Ordering Code 1665767 1285961 1284975 1285977 1286052 1285989 1285992 1286007 1286018 1286029 1285101 1286034 1285046 1285199 Note The Scope channel A and B input attenuator top shieldings are provided with a plate spring. The spring end is provided with heat conducting tape; it contacts the C-ASIC's N1000 and N1200, and transports the heat from the C-ASIC to the shielding. Do not bend the springs, keep the tape on the spring end free of dust, and put the shielding on the correct position. 3-6

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Fluke 19xB-19xC-2x5C
Service Manual
3-6
3.4 Main PCA Unit Parts
See Table 3-2 and Figure 3-2 for the main PCA Unit parts.
Table 3-2. Main PCA Unit Parts
Item
Description
Ordering Code
1
Shielding box assy (includes rubber spacer, see fig. 8-5)
1665767
2
Insulation foil
1285961
3
PT-Screw K35x8
1284975
4
Input connector unit
1285977
5
Sealing ring for power connector
1286052
6
Input attenuator shielding:
- METER channel top
- METER channel bottom
- SCOPE channel A top
- SCOPE channel B top
- SCOPE channel A&B bottom
1285989
1285992
1286007
1286018
1286029
7
Screw Torx M3x20
1285101
8
Shielding cover
1286034
9
Combi-screw Torx M3x10 (screw + split spring)
1285046
10
Hexagonal spacer M3x16.5
1285199
Note
The Scope channel A and B input attenuator top shieldings are provided with a
plate spring.
The spring end is provided with heat conducting tape; it contacts
the C-ASIC’s N1000 and N1200, and transports the heat from the C-ASIC to the
shielding.
Do not bend the springs, keep the tape on the spring end free of dust, and put the
shielding on the correct position.