Control System 56Service Manual – SC500
Shop Measurements - Display Board (EB2) (continues)
J3 8 way ribbon connector
Figure 46
PIN 1 PIN 8
PIN Color Circuit Description Measured Comments
1 Power supply - common 0.003v
2 SP / EXTRAPR function LED (red)
(LD3R)
1.78v Red LED on
0.032v Red LED off
3 SP / EXTRAPR function LED (green)
(LD3V)
1.95v Grn LED on
0.032v Grn LED off
4 BRUSH RELEASE function LED
(LD4)
0.07v LED off
Pulsing when ashing
5 BRUSH RELEASE switch (P6) 3.14v not pressed
0.03v pressed
6 INCREASE SPEED button (P7) 3.14v not pressed
0.02v pressed
7 DECREASE SPEED button (P8) 3.14v not pressed
0.02v pressed
8 ONETOUCH / EXTRAPR. button
(P5)
3.16v not pressed
0.04v pressed
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