Interlock Switch Removal; Ower Ntry Odule Emoval - Welch Allyn CL 300 Service Manual

2. Remove the nut from the wire tie clamp securing the lamp cable to the bottom chassis. Remove the lamp
cable from the power supply and remove the cable.
3. Installation is the reverse process with the longer cable wire going to the HV+ terminal on the power supply
and connecting the shorter wire to the Lamp Return - terminal. View the unit from the rear and compare the
HV+ and the Lamp Return - are connected as shown in "Photo 8" on page 24.
I S R
NTERLOCK WITCH EMOVAL
1. Remove the 9 screws securing the top cover and remove the cover.
2. Disconnect the wires from the interlock switch.
3. Remove the two nuts from the interlock switch and remove.
4. Installation is the reverse process, connecting the wires to the terminals marked COM and NO.
P E M R
OWER NTRY ODULE
1. Remove 9 screws securing the top cover and remove the cover. Remove the 3 screws from the bottom of the
back panel. Remove the nut securing center baffle to the back panel.
2. Remove the 4 screws securing the chassis fan. Remove the wires from PEM.
3. Remove the two nuts securing the PEM to the back panel. Remove the PEM.
4. Installation is the reverse process with the following requirements:
• The star washer is located between the PEM flange and the painted surface side of the back panel.
• The flat washer is installed on the other side of the panel and is secured with the nut.
• Rotate the screw so that you can later install the power cord retainer.
• The brown wire is connected to the terminal marked as P on the PEM. The blue wire is connected to the
terminal marked as N on the PEM. The green wire from the back panel is connected to the ground termi-
nal on the PEM.
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EMOVAL
WELCH ALLYN