IBM 3270 Maintenance Manual page 303

3-1700-16
4.
Measurement Test
1
is now running.
Measure the voltages at the power-connector
lands for the values shown in the table below.
Do not press any keys on the keyboard until
the PIC instructs you to do so.
Power Connector
Power Connector
/ \ 4 3 2 1
r~~,~.~
. .
~··r
~~ ~c:=J OnCe
0
J
~
CJc:=J
~4
F - - l i l t
13-
N I • ·b
ote oeatlng rl
Type 1
Type 2
Test description
Fixed Disk Response
Meas~rement
Test 1
+ Lead Power 4
+ 5.2 to 4.8 Vdc
- Lead Power 2
+ Lead Power 1
+ 12.6 to 11.5 Vdc
- Lead Power 3
ARE THE VOLTAGES CORRECT?
NO Go to page 3-9999-1, "Undetermined
Problems. "
YES
Maintenance Information