HP 9020 Service Manual page 179

Assembly Access 4-79
Sweep Board
1. Remove top cover.
WARNING
WAIT AT LEAST 5 MINUTES FOR CAPACITOR DISCHARGE AF-
TER REMOVING POWER CORD.
2. Loosen four 1I4-turn # 1 Pozidriv captive screws and remove top lid from display (Figure
4-79).
CAUTION
HANDLE SINGLE-WIRE CONNECTORS BY CONNECTOR ONLY.
OTHERWISE, WIRE MAY BREAK INSIDE THE CONNECTOR.
3. Disconnect two single-wire connectors (Figure 4-82).
WARNING
FAILURE TO PERFORM THE NEXT STEP COULD RESULT IN IN-
JURY.
4. Fold back rubber from anode connector (Figure 4-82) and short circuit anode to chassis
using screwdriver with insulated handle.
SINGLE-WIRE
CONNECTORS
Figure 4-82. Releasing Sweep Board
THUMBSCREW