Repair manual

PARTS REPLACEMENT
4-28
h. Remove the eight screws securing the Logic Board Assembly to
the chassis.
i. Gently slide the Logic Board Assembly out of the chassis. Use care to
prevent damaging the components or circuit etching.
3. INSTALLATION:
a. Install the new Logic Board Assembly from the rear.
CAUTION: Use extreme care to avoid striking or scraping
the board components against chassis components
when positioning the Logic Board in the chassis.
b. Secure the Back Plate with the four screws.
c. Secure the green ground wire to the chassis.
IMPORTANT: When securing the ground wire, be sure to
replace all cables, hexnuts and splitwahsers
in the exact order in which they were removed.
d. Secure the Logic Board Assembly with the eight screws.
e. Reconnect the wiring to the eight connectors on the board.
f. Replace the Power Supply Board (paragraph I).
g. Replace the Monitor Board Assembly (paragraph H).
h. Perform the follwoing calibration and adjustment procedures called out
in Section 5.
WARNING: Since power is ON for these procedures, use
extreme care to prevent electrical shock.
i. Replace the Cover on the chassis using six screws.