Valleylab Force FX-C - Correcting IC U3 Malfunctions

Correcting IC U3 Malfunctions
Correcting IC U3 Malfunctions
6-20
Equipment required:
• Phillips screwdriver
• surface mount, quad pack chip extractor.
Warning
1. Turn off the generator. Disconnect the power cord from the wall
receptacle.
2. Remove the five screws that secure the cover to the chassis. Lift the
cover off the chassis.
3. Remove
the Control board.
a. Unlock the connector on the Control board and disconnect the
display board ribbon cable from the Control board.
b. Carefully slide the Control board straight up through the slots in
the heat sinks to disconnect it from the Power Supply /RF board.
4. On the Control board, verify that the pins for programmable IC U3 are
properly seated in their socket.
a.
Grip IC U3 with the chip extractor and lift it out of its socket.
b. Align the notch on IC U3 above the notch on the socket and gently
press the chip back into the socket.
5. Install the Control board.
a. Position the Control board over the Power Supply /RF board with
the components facing the rear panel. Fit the edges of the board
into the slots on the heat sinks. Slide the board down, carefully
fitting
the edge connector into the matching connector on the
Power Supply /RF board.
b. Connect the display board ribbon cable to the Control board and
lock the connector.
6. Calibrate the generator. Refer to Section 5 for instructions. If the
calibration is successful, install the cover (refer to step 11).
Force F)(TM-C Service Manual