IBM 3277 Troubleshooting Manual page 107

Prior to
EC 717661
+34V Return
+34V
EC 717661
and
loter
+34V Return
Diagram 7·9. Low-Voltage Printed Circuit Board
+5V +5V Return
J2
0--=========-========00 -12V (3
pi ns)
-12V
Return
(8 pins)
-18V
Return
Component Locations 7·1