IBM 6151 Maintenance And Service Manual page 219

Intermittent Problems PIC 0090
Use this PIC for intermittent problems that do not fail while
running the diagnostic routines.
Step 1
Som~
problems occur every time an application program is
runnmg.
DOES THE PROBLEM OCCUR EVERY TIME AN
APPLICATION PROGRAM IS RUNNING?
YES Go to "Application Only Problems PIC 0080" on
page 3-0080-1.
NO Continue on the next page.
(6/88) Problem Isolation Charts 3-0090-1