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Model 101/102 Water Level Meter
Complete Electronics Replacement
Tools and Materials Needed
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Required Repair Kit
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Small Flat Screwdriver (3 mm (1/10")
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10 mm (3/8") Wrench
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Wire Cutters
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Wire Strippers
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Solder Wire with Flux
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Soldering Iron
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Circuit Board Showing Wire Connections
Replacing all Electronics
Complete Electronics Kit (#103558) Includes:
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Sensitivity Switch and Knob
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Test Button
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Red LED Indicator Light with Terminals
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Battery Tray and 2 Phillips Screws
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Circuit Board Assembly with Sonalert
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9V Alkaline battery
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Remove the battery from the Meter. Undo the three screws holding the faceplate to the hub.
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Remove the faceplate and disconnect the Molex connector connecting the circuit board to the tape.
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From the front of the faceplate, unscrew the test button and push it out of the faceplate.
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Push the light out of the faceplate.
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Use the Phillips screwdriver to undo the two screws holding the battery tray to the faceplate. Cut the red and black wires from the back of the battery tray. Remove the battery tray.
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Unscrew the Sonalert retaining ring from the front of the faceplate and remove the Sonalert and Circuit Board Assembly.
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Use the small flat screwdriver to unscrew the small brass screw on the side of the sensitivity knob. Remove the sensitivity knob. Use the pliers to unscrew the nut holding the sensitivity switch and remove the switch from the faceplate.
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Insert the new battery tray through the faceplate. Use the two screws to secure the tray to the faceplate.
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Put the new Sonalert through the faceplate, and secure it using the retaining ring.
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Install the new sensitivity switch, light, and test button in the faceplate.
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Solder the wires from the new circuit board assembly to the correct connections on the test button, battery tray and sensitivity switch. Use steps 12 - 17, along with the diagram above, as a reference.
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The red wire labeled B+ on the circuit board is connected to the positive terminal of the battery tray.
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The other two red wires on the right side of the circuit board are connected to the first two connections on the sensitivity switch.
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The black wire on the right side of the circuit board is connected to the third terminal on the sensitivity switch.
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The black wire furthest left on the circuit board is attached to the terminal on the top of the sensitivity switch.
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There will be a black wire connecting the battery to the top of the sensitivity switch. The new circuit board assembly comes with a separate replacement wire. |
- The other black wire connected to the top of the sensitivity switch is connected to the negative terminal on the battery tray.
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The red wire closest to the center of the circuit board is connected to the positive terminal of the test button, and the black wire labeled B on the circuit board is connected to the negative terminal on the test button.
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Place the new circuit board assembly over the connections to the Sonalert and attach the wires from the light to the Sonalert using the two screws through the circuit board.
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Connect the Molex connector from the new circuit board to connector on the tape. Install the new battery.
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With the Probe in a glass of tap water, turn the Water Level Meter to the 'ON' position. If the connections are correct the buzzer and light will activate. If the buzzer or light do not activate, check the polarity of the battery and Molex connector, and the soldered connections.
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Reattach the faceplate to the reel using the three screws.
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