Tailgate; Signal Connectors; Power Connector S - IBM 7090 Instruction-Reference

7.6.00 TAILGATE
The tailgate area contains all the signal and power connectors that enter and leave
the console.
It
is located in gate H of the console frame. See Figure 7. 6-1.
7.6.01 Signal Connectors
The tailgate contains twelve
si~al
connectors, sometimes called "biscuits," each
of which holds 40 conductors.
7 . 6. 02 Power Connectors
Three Winchester male power connectors are mounted at the base of the tailgate
assembly, at an angle to the vertical signal connector portion. They consist of a 104-
conductor, a 34-conductor, and a 75-conductor connection. The 104-conductor cable
contains the marginal checking control lines, the 34-conductor cable contains the 400-
cycle lines from the power distribution frame (PDF), and the 75-conductor cable con-
tains the 60-cycle power and other miscellaneous control lines to and from the PDF.
Removal and Replacement
Be sure the marginal check voltages are all at normal before removing the 104-
conductor cable. The three-power connectors can be removed from the console in any
order. When replacing cables, hold the connector with its female lug on the left side as
it faces the tailgate.
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