NEC DB2000 Service Manual page 66

Part 3b: Assembly
Fitting the Back-up battery
Ensure Anti-Static strap is worn and connected to the earth bonded table Ensure Anti-Static strap is worn and connected to the earth bonded table
before handling any components. before handling any components.
Inspect all components for any obvious damage. Inspect all components for any obvious damage.
GROUND
CONTACT
MOUNT THE BATTERY IN
THE ORIENTATION SHOWN.
NOTE:
Only tweezers with covered tips, or Plastic
tweezers are to be used when fitting the
battery.
CAREPOINT:
Check the ground contact, (shown above),
for any damage, or solder on the raised face of
the spring.