Tektronix WFM5250, Руководство по обслуживанию

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Removal and Replacement Procedures
Figure 5: Screws that attach fan bracket to main chassis
FPGA board 1. Remove the three pan-head 40 X 0.187 T10 screws that secure the FPGA
board to the Video I/O board below it. When reassembling, tighten these
screws to 0.62 N-M (5.5 in/lb). When reinstalling the FPGA board, ensure
that none of the cables are pinched between the board and the main chassis.
2. Lift the FPGA board straight up, in order to disconnect the inter-board
connector on the bottom of the FPGA board from the Video I/O board. When
reinstalling, make sure that these connectors are aligned correctly before
pushing the FPGA board down onto the Video I/O board.
3. Disconnect the display cable from J7 on the FPGA board. Pull the plug
straight out from the connector to prevent damage.
4. Place the FPGA board on a static-free work surface.
Video I/O board 1. Remove the three
3
/
16
inch spacer posts that secure the Video I/O board. When
reassembling, tighten these to 6.2 N-M (5.5 in/lb).
When reinstalling the Video I/O board, ensure that none of the cables are
pinched between the board and the main chassis.
2. Lift the Video I/O board straight up, to disconnect the inter-board connector
on the bottom of the Video I/O board from the CPU board. When reinstalling,
make sure that these connectors are aligned correctly before pushing the
Video I/O board down onto the CPU board.
3. Place the Video I/O board on a static-free work surface.
30 WFM5250 Waveform Monitor Service Manual