Amada Miyachi Unitek STA-100A, Operation Manual, Page: 70 / 154

CHAPTER 5: MAINTENANCE
STA SERIES AC CONTROLS
5-6 990-351
4 Remove the nine 6-32x3/8 Phillips head screws and nine #6 flat nylon washers that secure the
circuit board to the Control and remove the board.
5 Install or re-install the circuit board with nine 6-32x3/8 Phillips head screws and nine #6 flat
nylon washers, being careful not to over-tighten the screws and damage the circuit board.
6 If present, reconnect the following optional cable connectors to the indicated headers on the
circuit board:

Two-wire cable from the primary current sensor or secondary current sensor connector
connected to J11.

Two-wire cable from the Valve Expansion Card to J16 and the 26-wire ribbon cable from
the same circuit board to J5.
7 Reconnect the six I/O plugable terminal strips to the board (J6, J7, J8, J12, J13, and J14). See
Appendix B, Electrical and Data Connections for a detailed listing of I/O signals.
NOTE: If you are installing a new circuit board, be sure to connect the pullup connector to the
+24V connector or to whatever other power source it had been previously connected.
8 Reconnect the following cable connectors to the indicated headers on the circuit board:

Two-wire cable from the valve transformer T3, connected to J9.

Eight-wire connector from SCR Drive Board or Cascade Board to J15.

Thirty-four-wire ribbon cable from Control Panel Assembly to J4.

Four-wire cable (six-pin connector) from power transformer to J19 and seven-wire cable
(eight pin connector) from power transformer to J17.