General Maintenance
Assembly Procedures
3
3-13
3-20. Disconnect Miscellaneous Chassis Components
Use the following procedure to disconnect the remaining hardware from the chassis.
Parts referenced by letter (e.g., A) are shown in Figure 3-4 (2620A or 2625A) or Figure
3-5 (2635A).
1.
Use needle nose pliers to remove the internal connections at the line power plug (X).
Remove the ground screw prior to disconnecting the ground wire from the plug.
2.
Remove the power plug by releasing its two snaps one at a time.
3.
Disconnect the power transformer by removing the four 5/16-inch nuts (Y) that
secure it to the right side of the chassis.
4.
If installed, remove the 7-mm IEEE-488 connector screws (Z) (2620A only).
3-21. Assembly Procedures
Generally, assembly procedures follow a reverse sequence of disassembly procedures.
As some differences do apply, assembly is described separately in the following
paragraphs. Begin assembly at the appropriate level, as defined by the heading.
References are made to items in Figure 3-4 (2620A or 2625A) or Figure 3-5 (2635A) for
assembly details of standard instrument parts.
Note
Parts referenced by letter (e.g., A) are shown in Figure 3-4 (2620A or
2625A) or Figure 3-5 (2635A).
3-22. Install Miscellaneous Chassis Components
Use the following procedure to replace any items that have been removed from the basic
chassis.
1.
Replace the power transformer along the right side of the chassis. Use four 5/16-inch
hex nuts (Y).
2.
Snap the power plug into position.
3.
Use needle nose pliers to replace the interior connections at the power plug. Also,
attach the ground wire at its chassis connection.
3-23. Install the A/D Converter PCA
1.
Fit the A/D Converter PCA (L) so that the chassis guides pass through notches on
both sides of the pca. Then slide the pca back until it is snug against the Input
Module enclosure.
2.
Fasten the A/D Converter PCA to the chassis with three 6-32, 1/4-inch panhead
screws (W).
3.
If the Front Panel Assembly is installed, attach the leads connecting the two input
terminals to the A/D Converter PCA. Using needle nose pliers, push the wire
connectors firmly onto the recessed input terminal pins (red to V
Ω
and black to
COM.)
4.
At the A/D Converter PCA, attach the cable leading to the Main PCA.
5.
From the Rear Panel, push the Input Module back into place.
Summary of Contents for 2620A
Page 4: ......
Page 18: ...HYDRA Service Manual 1 2...
Page 48: ...HYDRA Service Manual 1 32...
Page 140: ...HYDRA Service Manual 3 16...
Page 234: ...HYDRA Service Manual 5A 34...
Page 236: ...HYDRA Service Manual 6 2...
Page 254: ...HYDRA Service Manual 6 20 2620A 1601 s63f eps Figure 6 3 2620A 2625A A1 Main PCA...
Page 258: ...HYDRA Service Manual 6 24 2635A 1601 s64f eps Figure 6 4 2635A A1 Main PCA...
Page 260: ...HYDRA Service Manual 6 26 2620A 4002 CKT 1 CKT 2 s65f eps Figure 6 5 A2 Display PCA...
Page 272: ...HYDRA Service Manual 6 38...
Page 274: ...HYDRA Service Manual 7 2...
Page 282: ...HYDRA Service Manual 7 10...
Page 284: ...HYDRA Service Manual 8 2...
Page 285: ...Schematic Diagrams 8 8 3 Figure 8 1 A1 Main PCA 2620A 2625A 2620A 1601 s88f eps...
Page 288: ...Schematic Diagrams 8 8 6 Figure 8 1 A1 Main PCA 2620A 2625A cont 2620A 1001 3 of 4 s73f eps...
Page 292: ...Schematic Diagrams 8 8 10 2635A 1001 2 of 5 Figure 8 2 A1 Main PCA 2635A cont s76f eps...
Page 293: ...Schematic Diagrams 8 8 11 2635A 1001 3 of 5 Figure 8 2 A1 Main PCA 2635A cont s77f eps...
Page 296: ...Schematic Diagrams 8 8 14 2620A 4002 CKT 1 CKT 2 Figure 8 3 A2 Display PCA s90f eps...
Page 300: ...Schematic Diagrams 8 8 18 2620A 1003 2 of 3 Figure 8 4 A3 A D Converter PCA cont s82c eps...
Page 301: ...Schematic Diagrams 8 8 19 2620A 1003 3 of 3 Figure 8 4 A3 A D Converter PCA cont s83c eps...
Page 302: ...Schematic Diagrams 8 8 20 2620A 1604 Figure 8 5 A4 Analog Input PCA s92f eps...
Page 304: ...Schematic Diagrams 8 8 22 2620A 1605 Figure 8 6 A5 IEEE 488 Interface PCA 2620A Only s93f eps...
Page 306: ...Schematic Diagrams 8 8 24 2625A 1606 Figure 8 7 A6 Memory PCA 2625A s94f eps...
Page 310: ...Schematic Diagrams 8 8 28...
