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TROUBLESHOOTING & REPAIR
F-51 F-51
INVERTEC STT
TRIGGER CIRCUIT TEST (continued)
FIGURE F.20 – 14 PIN AMPHENOL AND PLUG J31 PIN ASSIGNMENTS
K
B
I
H
N
L
C
D
M
G
E
F
J
A
5. Using the ohmmeter check for approximately
3.5 ohms resistance from pin "D" of the 14 pin
amphenol to plug J31 pin 2 (lead #212). See
Figure F.20, and Figure F.22, Simplified
Trigger Circuit Diagram.
FIGURE F.21 – CONTROL PC BOARD MOLEX PLUG
J4
223
210
G2782-[ ]
STT CONTROL
J1
J3J2
J28J27
J17
J5
6. Using the ohmmeter, check for approximately
3.5 ohms resistance from pin "C" of the 14 pin
amphenol (see Figure F.20) to plug J4 pin 9
(lead#223) at the control PC board. See
Figure F.21 and Figure F.22, Simplified
Trigger Circuit Diagram.
PLUG J31
212