Dell 2135cn Service Manual page 298

Step
Checking the power to the SENSOR PHOTO
Disconnect J23 from the PWBA MCU.
9
Is the voltage across P23-6pin <=> ground on the PWBA
MCU, about +3.3 VDC?
Checking the SENSOR PHOTO for operation
Check the voltage across J23-8pin <=> ground on the
PWBA MCU.
10 Remove the CHUTE LOW (PL3.2.27) once to check the
operation.
Does the voltage change, when the ACTUATOR SSI is
operated?
Version 1 2008.02.01
Check
1 - 270
Chapter 1 Troubleshooting
Remedy
Yes
Replace the
PWBA MCU.
Go to step 10. (Refer to Removal
31/ Replacement
29.)
Replace the
PWBA MCU. Replace the
(Refer to Removal SENSOR
31/ Replacement PHOTO.
29.)
No