IBM 5150 Hardware Maintenance Manual page 95

Press
!9 [q
(Sync Test) and
~
(Enter). The
voltages listed in the table below should be present on pins 8
and 9 of the 9 pin connector and at the phono-jack connector.
Measure the voltage present at pins 8 and 9 or the 9 pin ("".
connector and the voltage between the center and outer edge .
of the phono-jack.
Pin Volts - DC
8 0.8-1.5
9
0.5-1.0
Phono 0.2-0.6
o
0
o
WERE YOU ABLE TO READ THE PROPER VOLTAGES ON
PINS 8 AND 9 AND AT THE PHONO-JACK CONNECTOR?
NO
Replace your Color/Graphics Monitor Adapter. See
Section 3, "Removal/Replacement."
YES
Replace your Monitor. See Section 3, "Removal/
Replacement. "
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