IBM 3277 Troubleshooting Manual page 45

Sheet IS
Sheet 17
Sheet 19
Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 16 of 29)
4.18
Either trouble disappeored,
or buffer wos fully
protected when trouble
reported.
Probe
while holding
~
key pre,sed.
Probe while holding _
key
prnsed.
Red ond Gr .... n