Anritsu Company Site Master S312D, Руководство по обслуживанию

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Removal and Replacement 3-4 Opening the Case
S312D MM PN: 10580-00195 Revision B 3-5
3-4 Opening the Case
1. Remove the four rubber corner bumpers by lifting and sliding them off the corners. This reveals the four
screws that hold the front and rear of the case together.
2. Remove the 4 screws that connect the front and rear of the case.
3. Separate the front and rear of the case by approximately 2 inches. Gently unplug the 4 cables that
connect into the main PCB. The 2 halves of the instrument can then be completely separated.
3-5 Removal of the LCD and Keypad Assemblies
1. Remove the LCD wires from under the plastic retaining clips of the metal backing plate.
2. Remove the 14 screws that secure the backing plate to the case.
3. Lift up the backing plate. The LCD often remains attached to the backing plate by the friction of the
rubber gasket.
4. Disconnect the flexible PCB from the LCD circuit board by pulling outward at each end of the connector
with tweezers or other pointed tool.
5. Lift the LCD away from the backing plate.
6. Lift off the rubber cushion, the keyboard PCB, and the keypad membrane.
Caution
ESD Requirements: The model S312D contains components that can be easily damaged by
electrostatic discharge (ESD). An ESD safe work area and proper ESD handling procedures that
conform to ANSI/ESD S20.20-1999 or ANSI/ESD S20.20-2007 are mandatory to avoid ESD
damage when handling subassemblies or components that are found in the S312D instrument.
Repair of damage that is found to be caused by electrostatic discharge is not covered under
warranty.
Figure 3-3. Removing the Corner Bumpers