Sony CCP-8000 Installation Manual page 34

1-10. Checks on Completion of Installation
<LED on the IF-844 board> (G-9) : S-BUS
D1 (B-1) : S-BUS RX status LED
Lit when receiving data.
<Switch on the IF-844 board> (G-9) : S-BUS
S1 (B-3) : RESET switch
Pressing this switch resets the IF-844 board.
<TEST terminal on the IF-844 board> (G-9) : S-BUS
E1 (B-3) : GND terminal
Use this terminal as the earth point for measuring the
respective check terminals.
TP1 (A-2) : RX check terminal
S-BUS communication line measuring terminal.
TP2 (A-3) : TEST terminal
Terminal for testing.
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CCP-8000 IM