IBM PCjr Hardware Maintenance And Service page 43

4. The voltages at the diskette-dnve fan connector on
the power board should be within the ranges hsted
below.
Pin 2 to Pin 1
Pin 2 to Pin 3
Low vdc High Vdc
WERE YOU ABLE TO READ THE CORRECT
VOLTAGES?
NO The power board is bad. Replace it.
Repeat advanced POST and the advanced
tests to ensure that the IBM PCy> is operating
correctly.
The diskette-drive fan is bad. Replace it.
Repeat advanced POST and the advanced
tests to ensure that the IBM PCyr is operating
correctly.
Start 3-000-7