1730–Series Maintenance
6–18
3. To install a bulb, hold it with the tweezers as described in step 2,
position it in front of the socket, and push the bulb with your finger until it
snaps into place.
4. Replace the bezel.
1. Remove the bezel.
WARNING. The CRT may retain a dangerous charge. Ground the conductor of
the anode to discharge the CRT. Do not allow the conductor to touch your body
or any circuitry.
2. Slide a screwdriver with an insulated handle under the anode cap on the side
of the CRT, and ground the anode to the chassis, to discharge the CRT. DO
NOT touch the metal shaft of the screwdriver while doing this. Disconnect
the anode cap by prying it gently away from the CRT.
3. Disconnect J225 (trace rotation) on the Main board and push the connector
through the hole in the board.
4. The CRT can now be pulled straight out (some pressure may be needed).
The CRT shield, along with the grommet around its front and the rubber
manchet around its back, should come out with the CRT.
1. If the CRT is to be replaced, remove the metal shield from the neck of the
old CRT and place it around the neck of the new CRT, with the WARNING
sticker towards the top of the instrument. This should place the opening in
the grommet on the front edge of the shield towards the bottom of the
instrument. Ensure that the rubber manchet is on the back edge of the shield.
2. Slip the CRT part way back into position and feed the trace rotation wires
(and plug) back through the hole in the Main board.
WARNING. The CRT may retain a dangerous charge. Ground the the anode
connector to discharge the CRT. Do not allow the conductor to touch your body
or any circuitry.
3. Use a screwdriver to ground the anode connector on the CRT to the chassis.
4. Slide the CRT into the instrument, guiding the rubber manchet on the end of
the shield into the rear CRT support.
5. Align the socket on the A10 CRT Socket board with the pins and key on the
CRT. Gently push the CRT and the socket board together until the CRT pins
are fully seated in the socket.
CRT Removal
CRT Replacment
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