Assessments - 3, GPA: 4.3
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· Inside the unit there are parts that can become contaminated by oils from the skin. These parts should not be directly handled. When lifting out the elastomeric connectors and the main switch pad, it is recommended that tweezers or sterile gloves be used. 3. Remove the two case bottom screws, located at the LCD-end of the unit and separate the bottom case from the top case. 4. Removing any of the interior components of the unit requires removing the Main PCA. To remove the Main PCA, place the top case face down and remove the two screws that attach the Main PCA to the top case. Gently lift the Main PCA out of the top case. The IR Lens, small Isothermal PCA, backlight, elastomeric connectors, and the LCD may all lift out attached to the Main PCA. 5. If the Isothermal PCA separates from the Main PCA, the Isothermal PCA, IR Lens, backlight, elastomeric connectors, and the LCD will still be in the top case. Lift them out of the top case after the Main PCA is removed. 51, 52, 53, 54 Series II Service Manual 6. The LCD decal is now exposed and may be removed. 7. To remove the main switch pad, first remove the small elastomeric connector at the top of the switch pad, and then lift out the entire switch pad. Reassembly The reassembly procedure is basically the reverse of the disassembly procedure. However, there are several points in this process that should be explained further. Note For reassembly, the thermometer top case should be face down, with the keypad end of the top case facing the user. Reinstalling the LCD Assembly Follow these steps to reinstall the LCD assembly: 1. Install the LCD decal. 2. When putting the LCD back into the top case, make sure the LCD is correctly aligned. The edge of the LCD with the bubble in it should be facing the left side of the open, face down top case, and the LCD should be placed into the top case face down. 3. When reinstalling the backlight, the backlight pins should be on the left side of the open top case and they should be facing up. Check that the pins are straight. To make sure that the backlight is centered, line up the bottom left corner of the backlight with the guide that is molded into the top case. The left corner of the backlight should fit directly over this guide and the bottom right side of the backlight should also be lined up with (but not over) a similar guide on the right side of the open top case. 4. Install the two LCD elastomeric connectors. Rebuilding the Main PCA When reinstalling the Main PCA, make sure that the Isothermal PCA and the IR Lens are attached to each other first. To do this, follow these directions: 1. Turn the Main PCA over so that the components are face down. 2. Attach the Isothermal PCA to the Main PCA by inserting the pins into the matching holes on the Main PCA. Note When putting the Isothermal PCA back onto the Main PCA, do not push the Isothermal PCA all the way down into the contact holes of the Main PCA. If the Isothermal PCA is kept slightly loose, it makes installation of the IR Lens easier. 3. Reinstall the IR Lens by taking the Main PCA (with the Isothermal PCA loosely attached), and with the component side facing down; slide the IR Lens in between the main board and the Isothermal PCA. 4. Line up the tab on the Isothermal PCA and the notch in the IR Lens and push the two together. The contacts of the IR Lens should slide under the Isothermal PCA and they should be making contact with pads on the underside of the Isothermal PCA. Thermometer Replaceable Parts 5. Push the Isothermal PCA and the Main PCA together so that the Isothermal PCA pins go deeper into the Main PCA sockets. This holds the IR Lens in place and allows the Main PCA to be reinstalled into the top case. Reinstalling the Main PCA 1. While holding the IR Lens to the Main PCA, turn the Main PCA over so that the components are facing up. 2. Align the screw holes in the Main PCA with those in the top case. 3. Align the backlight pins with the Main PCA sockets. 4. Align the Main PCA holes with the backlight posts. 5. Gently push the Main PCA down into the top case, making sure that the IR Lens goes into the groove on the LCD-end of the top case. If it does not fit together easily, check to make sure that everything is properly lined up and try again. 6. Reinsert and tighten the two pca screws. To complete the thermometer reassembly, screw the bottom case to the top case, reinstall the batteries and screw the battery compartment shut. Replaceable Parts Refer to Table 4 for all replacement part numbers and Figure 6 for part locations. Unless specified in the “Model Number” column, all parts are for all units. To order replaceable parts, see the “Service Centers” section of this manual. Table 4. Replaceable Parts Item Number Qty. Fluke Part Number Description Model Number 1 3 376756 BATTERY, PRIMARY, 1.5V, 0-150MA, AA ALKALINE All 2 4 803582 SCREW , PH, P, CAPT, STL, 4-40, .25 All 3 4 1 1 642931 669838 BATTERY DOOR: · SCREW, PH, P, AM THD FORM, STL, 4-14, .312 · ...
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