Fluke 45 - 3-31. Install the IEEE-488 Option; 3-32. Assemble the Front Panel Assembly

45
Service Manual
3-12
2. Ensure that the nylon standoff support (front-center of the Main PCA) is in place.
Then slide the Main PCA onto the chassis slider taps.
3. Fasten the Main PCA to the chassis with a 6-32, 1/4-inch panhead screw ("H").
4. Connect the transformer cable ("F") and RS-232 cable ("G") at the Main PCA.
3-31. Install the IEEE-488 Option
Both the instruction sheet provided with the IEEE-488 Option and Chapter 8 of this
manual fully describe installation. The following instructions provide installation
procedure essentials. If necessary, refer to Chapter 8, paying particular attention to
Figures 8-2 and 8-3.
1. Check that the plastic standoff remains in the appropriate hole in the Main PCA
(narrow end of the standoff down.)
2. If necessary, install the two ribbon cables on the IEEE-488 circuit board. Each cable
fits in only one socket and in only one direction. Make sure the cables lock firmly in
place.
3. Attach opposite ends of the ribbon cables onto the Fluke 45 Main PCA.
4. Install the IEEE-488 PCA into the small slot in the side of the Fluke 45 (two ribbon
cables facing forward.) The end of the plastic standoff fits into the hole in the IEEE-
488 PCA. Make sure the IEEE-488 PCA is firmly gripped against the retainer on the
standoff and that the rear of the pca rests upon the support just forward of the
transformer.
5. Secure the rear of the IEEE-488 PCA with the panhead Phillips screw.
6. Connect the 24-line cable assembly to the IEEE-488 circuit board.
3-32. Assemble the Front Panel Assembly
As appropriate, use the following steps to assemble the Front Panel Assembly.
1. Clean the lens ("D") with deionized air and, if necessary, isopropyl alcohol. Then
gently snap the lens into the front panel tabs.
2. Install the elastomeric keypad assembly ("C"). Make sure that the four front panel
guide pins protrude through the keypad.
3. On the Display PCA, clean the display with deionized air and, if necessary,
isopropyl alcohol.
4. Slide the Display PCA into the bottom securing tabs on the back of the Front Panel
Assembly. Then gently snap the pca into the remaining tabs along its periphery.
Note
The Display PCA provides a space for a center securing screw. If the
peripheral tabs are intact, this screw is not necessary. If some of the tabs
are broken, the screw can be used as an additional securing device.
5. Connect the 20-pin cable connector ("A") to the Display PCA.