Olivetti DR N17 Service Manual page 321

7 Power OFF the printer, empty Tray 1 and load paper in the MBF Tray (MBF). Power ON the
printer and run a Print Engine Controller Test Print in Diagnostic Mode 2 (Test Print Mode). The
noise is present.
Y: Inspect the MBF Tray Feed Roll drive and associated gears. Replace as necessary.
N: Go to step 8.
8 Reinstall all the optional components one at a time, testing each time for the noise.
Y: When the source of the noise is discovered, isolate the defective component(s) and
replace.
N: Go to Final Actions.
WARNING! When Diagnostic Mode 1, Main Motor, is enabled, the Main Drive Motor will run. Be
extremely careful around moving parts.
687200Q Service Manual 7-73