Tektronix WFM5250, Service Manual

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Removal and Replacement Procedures
Front Panel/Bezel
Disassembly
1. Remove the two fl at-head 40 X 0.25 T10 screws that attach the main chassis
to the LCD module. When reassembling, tighten these screws to 0.45 N-M
(4.0 in/lb).
2. Use a Phillips screwdriver to remove the two 40 X 0.187 P1 screws that
secure the bottom of the bezel to the main chassis. When reassembling,
tighten these screws to 0.62 N-M (5.5 in/lbs).
3. Pull the bezel forward. Slide the cable out of the slot on the main chassis.
When reassembling, pull the cable that connects to the front panel through the
slot on the main chassis
fi rst, then reattach screws.
Remove the front panel board from the bezel.
The front panel board can be
removed from the bezel and replaced, if needed:
1. Disconnect the front panel cable from J1 on the front panel board.
2. Remove the three knobs on the front panel.
3. Remove the one pan-head 40 X 0.187 T-10 screw that secures the front panel
to the bezel, and one spring-clip. When reassembling, be sure to position the
spring-clip so that it angles above R42. (See Figure 8.)
4. Use a
3
/
16
inch nut driver to remove the two 0.687L 0.188 hex spacer posts
that secure the front panel board to the bezel.
5. Lift the front panel board away from the bezel.
6. Remove the elastomer mat from the bezel.
Figure 8: Correct spring clip position
WFM5250 Waveform Monitor Service Manual 33