Correcting T_ON ASIC Malfunctions
6-24 Force FX-8C Service Manual
6. Turn on the generator. If the generator successfully completes the self-
test, install the cover (refer to step 11).
7. If the alarm number reappears, replace programmable IC U9.
a. Turn off the generator. Disconnect the power cord from the wall
receptacle.
b. Remove the Control board (refer to step 3).
c. Grip IC U9 with the chip extractor and lift it out of its socket.
d. Align the notch on the new chip above the notch on the socket and
gently press the chip into the socket.
e. Install the Control board (refer to step 5).
8. Turn on the generator. If the generator successfully completes the self-
test, install the cover (refer to step 11).
9. If the alarm number reappears, replace the Control board.
a. Turn off the generator. Disconnect the power cord from the wall
receptacle.
b. Remove the Control board (refer to step 3).
c. Install the new Control board (refer to step 5).
10. Calibrate the generator. Refer to Calibrating the Generator in Section 5
for instructions. If the alarm number reappears, record the number and
call the Valleylab Service Center.
11. To install the cover, position the cover above the chassis and slide it
down. Install the five screws that secure the cover to the chassis.
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