Control Panel And Keylock - IBM 5251 Series Maintenance Information Manual

Control Panel and Keylock
110
CONTROL PANEL
Power Switch (rear)
Transformer
a
Line Filter
Cable Thru Feature
Address Switches
(rear)
1-+-+-++-+--1-11-- G rou nd
Address 4
'-----Address 2
'-------Address 1
108-110
•
'.
.
..,
. ..
.
.
Controls (rear)
Brightness
+8.5V~
Control
Ground
+8.5 V Contrast
Identifier
Depression
short
lead)
LED
Black (+5V)
Control~
Ground~
When you replace LEDs, align the
identified lead (white dot, flat side,
or short lead) with the yellow wire.
Terminator Switch (rear)
Position 2
Terminator
......... ---&..-+
Resistors
System Cable
'---'-~I- Con nector
L.-~---~Cable Thru
Connector
Position 1
Keylock
cE
N/0 (normally open)
Common
N/C
(normally closed)
Status
Switch (rear)
n
Ground
liTest
Maintenance Procedures 5251 MIM 1-9