HYDRA
Service Manual
3-12
3-18. Remove the Main PCA
With the IEEE-488 option (2620A) and the Memory PCA (2625A) or Memory Card I/F
PCA (2635A) removed, the Main PCA (H) can be removed. Parts referenced by letter
(e.g., A) are shown in Figure 3-4 (2620A or 2625A) or Figure 3-5 (2635A). Use the
following procedure:
1.
If it is still attached, remove the green power switch activator rod (J) extending from
the power switch on the Main PCA through the Front Panel Assembly. Squeeze the
end of the rod at the power switch and lift up; the bar disengages smoothly from the
switch.
2.
Using needle nose pliers, disconnect the display ribbon cable (G) on the Main PCA
(H) by alternately pulling up on each end of its connector. Avoid breaking the
alignment tabs on the Main PCA side of this connection. (This connector has already
been detached if the Front Panel Assembly was removed.)
3.
Detach the transformer connector at the Main PCA.
4.
Detach the Main-to-A/D Converter cable at the A/D Converter PCA.
5.
If installed, pull off the ALARM OUTPUTS and DIGITAL I/O terminal strips from
the Rear Panel.
6.
Remove the RS-232 connector screws (T) at the Rear Panel. Use a 3/16-inch nut
driver to loosen the connector securing hardware.
7.
If installed, remove the IEEE-488 connector. Use a 7-mm nutdriver to loosen the
two securing screws on the rear panel.
8.
Now remove the two screws (U) securing the Main PCA to the chassis. Slide the
Main PCA forward. Then, while matching the pca edge indentations to the guide
tabs on each chassis side, lift the Main PCA up and away from the chassis.
3-19. Remove the A/D Converter PCA
Use the following procedure to remove the A/D Converter PCA (V). Parts referenced by
letter (e.g., A) are shown in Figure 3-4 (2620A or 2625A) or Figure 3-5 (2635A).
1.
If necessary, remove the leads connecting the two front panel input terminals to the
A/D Converter PCA. Using needle nose pliers, pull and disconnect the wires at the
rear of the V
Ω
(red) and COM (black) input terminals. (These leads are already
disconnected if the Front Panel Assembly has been removed.)
2.
At the A/D Converter PCA, detach the cable leading to the Main PCA.
3.
From the Rear Panel, pull out the Input Module.
4.
Remove the three Phillips head screws (W) securing the A/D Converter PCA to the
chassis.
5.
Now slide the A/D Converter PCA forward to match the indentations in the pca
edges to the guides in the chassis. Then lift the pca out.
Содержание 2620A
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Страница 18: ...HYDRA Service Manual 1 2...
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Страница 126: ...HYDRA Service Manual 3 2 3 30 Install the Handle and Mounting Brackets 3 15 3 31 Install the Instrument Case 3 15...
Страница 134: ...HYDRA Service Manual 3 10 Q Y U P J O A D B C V W G K L M E T X H I s25f eps Figure 3 5 2635A Assembly Details...
Страница 140: ...HYDRA Service Manual 3 16...
Страница 172: ...HYDRA Service Manual 5 2 5 28 Failure to Detect Memory PCA 5 29 5 29 Failure to Store Data 5 29...
Страница 234: ...HYDRA Service Manual 5A 34...
Страница 236: ...HYDRA Service Manual 6 2...
Страница 244: ...HYDRA Service Manual 6 10 A4 MP3 A4 H65 MP2 MP66 MP67 2620A 100 s58f eps Figure 6 1 2620A 2625A Final Assembly cont...
Страница 250: ...HYDRA Service Manual 6 16 A4 MP3 A4 H65 MP2 MP66 MP67 2620A 100 s62f eps Figure 6 2 2635A Final Assembly cont...
Страница 254: ...HYDRA Service Manual 6 20 2620A 1601 s63f eps Figure 6 3 2620A 2625A A1 Main PCA...
Страница 258: ...HYDRA Service Manual 6 24 2635A 1601 s64f eps Figure 6 4 2635A A1 Main PCA...
Страница 260: ...HYDRA Service Manual 6 26 2620A 4002 CKT 1 CKT 2 s65f eps Figure 6 5 A2 Display PCA...
Страница 265: ...List of Replaceable Parts Service Centers 6 6 31 2620A 1604 s67f eps Figure 6 7 A4 Analog Input PCA...
Страница 267: ...List of Replaceable Parts Service Centers 6 6 33 2620A 1605 s68f eps Figure 6 8 A5 IEEE 488 Interface PCA Option 05...
Страница 269: ...List of Replaceable Parts Service Centers 6 6 35 2625A 1606 s69f eps Figure 6 9 2625A A6 Memory PCA...
Страница 271: ...List of Replaceable Parts Service Centers 6 6 37 2635A 1606 s70f eps Figure 6 10 2635A A6 Memory Card I F PCA...
Страница 272: ...HYDRA Service Manual 6 38...
Страница 274: ...HYDRA Service Manual 7 2...
Страница 282: ...HYDRA Service Manual 7 10...
Страница 284: ...HYDRA Service Manual 8 2...
Страница 285: ...Schematic Diagrams 8 8 3 Figure 8 1 A1 Main PCA 2620A 2625A 2620A 1601 s88f eps...
Страница 288: ...Schematic Diagrams 8 8 6 Figure 8 1 A1 Main PCA 2620A 2625A cont 2620A 1001 3 of 4 s73f eps...
Страница 292: ...Schematic Diagrams 8 8 10 2635A 1001 2 of 5 Figure 8 2 A1 Main PCA 2635A cont s76f eps...
Страница 293: ...Schematic Diagrams 8 8 11 2635A 1001 3 of 5 Figure 8 2 A1 Main PCA 2635A cont s77f eps...
Страница 296: ...Schematic Diagrams 8 8 14 2620A 4002 CKT 1 CKT 2 Figure 8 3 A2 Display PCA s90f eps...
Страница 300: ...Schematic Diagrams 8 8 18 2620A 1003 2 of 3 Figure 8 4 A3 A D Converter PCA cont s82c eps...
Страница 301: ...Schematic Diagrams 8 8 19 2620A 1003 3 of 3 Figure 8 4 A3 A D Converter PCA cont s83c eps...
Страница 302: ...Schematic Diagrams 8 8 20 2620A 1604 Figure 8 5 A4 Analog Input PCA s92f eps...
Страница 304: ...Schematic Diagrams 8 8 22 2620A 1605 Figure 8 6 A5 IEEE 488 Interface PCA 2620A Only s93f eps...
Страница 306: ...Schematic Diagrams 8 8 24 2625A 1606 Figure 8 7 A6 Memory PCA 2625A s94f eps...
Страница 310: ...Schematic Diagrams 8 8 28...
