Led Output Service Check - IBM 5280 Maintenance Information Manual

369
LED OUTPUT SERVICE CHECK
1. Connect the negative probe of the multimeter to
O.
2. Set the multimeter scale to 5 Vdc and connect the
positive probe to
D.
3. Check for a voltage level of 1 Vdc through 2 Vdc.
4. (51TD) Move the positive probe to
D.
5. (51TD) Check for a voltage level of 1 Vdc through
2 Vdc.
51TD
PTXCP TPA10
5 1 I
1000
01
0 0
o
00
TPB07
o
00
TPA08
D TPBO~O
0
0
0~A06
0
TPC030 0 01
TPD02
00
31SD
369
4 1
~
PTXCP
BA
00
1
o
00
00
00
00
00
00
00
00
I/O CP
00
00
00
00
00
00
00
0018
rolB
~A
2 1
LEDCP
o TP24V
TPLED
SCP
4 1
TPG02 0
TPH050
oTPHLD
100 01
LED and PTX Assemblies 49