Maintenance and Troubleshooting 11-67
Individual SURFACEVEL_3 values consistently read -
9.99.
-volt (blue) fuse on regulator may have blown.
Replace the Surface Combo
Sensor.
-volt blue fuse on the regulator.
Do not connect a questionable sensor to
another monitor before verifying the integrity of the
sensor. A shorted sensor will blow the 5
-volt (blue)
replacement fuse on the regulator in the mo
nitor.