Infinite TRANSTECTOR 700 AV/T Series Owner's Manual page 23

TROUBLESHOOTING CONTINUED
B. Correct and tighten any loose connections, replace any physically burned or broken components.
TROUBLESHOOTING (continued)
C. Check all fuses in system *.
B. Correct and tighten any loose connections, replace any physically burned or broken components.
C. Check all fuses in system *.
Time delay fuses, semi-conductor fuses, fan fuses, circuit board fuses, SCR fusible Link wire.
Time delay fuses, semi-conductor fuses, fan fuses, circuit board fuses, SCR fusible Link wire.
* NOTE: Remove fuses from circuit when checking to avoid false readings.
* NOTE: Remove fuses from circuit when checking to avoid false readings.
POWER MODULES (SCR's)
POWER MODULES (SCR's)
Refer to the diagram below and the diagram in Appendix A, Page A49-A50.
Refer to the diagram below and the diagram in Appendix A, Page 38.
1. Unplug the connections to the control cards Part #414921 labeled TB1, TB2 and TB3.
1. Unplug the connections to the control cards Part # 414921 labeled TB1, TB2 and TB3.
2. Disconnect any cooling fans in the unit so your SCR resistance checks are not interfered by
2. Disconnect any cooling fans in the unit so your SCR resistance checks are not interfered by fan motor
fan motor coils. Also remove main semi-conductor fuse located on all 3 SCR assemblies and
coils. Also remove main semi-conductor fuse located on all 3 SCR assemblies and any wires attached to
any wires attached to the fuse. Each power mod contains 2 inverse parallel SCR's.
the fuse. Each power mod contains 2 inverse parallel SCR's.
60K(i) Power Mod
(SCR)
100K(i) Power Mod
(SCR)
G1
4
K1
5
_
3
G2
6
K2
7
1
+
2
6
2
4
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