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Corrective Maintenance
6–10
1780R-Series Service Manual
Use the following procedure to replace the CRT.
1. Slide the CRT partially into position so the CRT base pins will align with the
socket. Push the socket into position onto the CRT pins.
CAUTION. Avoid bending the CRT base pins when pushing the CRT into the
socket. Do not pinch wires between the CRT and the socket.
2. Check that the four cushions are properly positioned in the corners of the
bezel opening. Push the CRT into position so that the faceplate is flush with
the original CRT’s location. Check that the CRT shield is seated firmly in the
base mount.
3. Tighten the CRT base mount nuts.
4. WAVEFORM CRT ONLY Reconnect all the deflection leads to the CRT.
Figure 6–3: Rear panel for the Tektronix 1780R-Series Video Measurement Set showing the location of sub-assembly
mounting screws
5. Reconnect the Trace Rotation connector to the Interconnect board (A11).
Reconnect the anode lead to the in-line connector.
CRT Replacement