IBM Token-Ring Network PC Adapter Hardware Maintenance And Service page 103

System Unit Power Supply
r7A
Screw
/.i::\
Legend
~
Connection
V
Primary Ground
-I
!ZZZZllL
Ground Wire
~.
Note: This lead present on
@
Ground Post
-=
ChassIs Ground
QJ
2201240 Vac machines only.
IBM Personal Computer XT
4-12