Veeco MS40 Operation And Maintenance Manual page 100

Circuit Board Replacement
The MS-40 contains three circuit boards in the unit and one circuit board in the
optional hand held remote. Circuit Board A is mounted on the inside of the
unit's rear panel, Circuit Board B is mounted on the inside of the unit's front
panel, Circuit Board C is located underneath and attached to the User Panel
and Circuit Board D is the board inside the handheld remote.
WARNING!
To replace Circuit Board A:
1. Open the rear panel by turning the captive screw at the top of the panel 1/4
2. Loosen and remove the screws that hold the shield that covers the
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4. Cut any tie wraps surrounding the sensor and make sure that the
only object connected to the sensor is the calibrator.
5. Push the quick release button on the calibrator body. Remove the
temperature sensor and leak standard by pulling the fitting down,
angling it out and then pulling out the fitting while the temperature
sensor is still attached to it.
6. Remove the temperature sensor from the leak standard and reattach
to a new leak standard.
7. Install the new leak standard and temperature sensor onto the
calibrator body. Place the fitting in the unit, angling the fitting in
the same manner as in Step 5 and then pressing the fitting into the
calibrator body. A positive click indicates that the standard has
been correctly installed.
The MS-40 must be turned OFF and disconnected from the
electrical supply prior to any repair or replacement of any
of the circuit boards. When the unit is powered ON,
potentially lethal high voltages are continually applied to
the circuit boards and other areas within the unit during its
operation. Failure to follow this precaution may lead to
severe injury or death.
turn counterclockwise and gently lowering the door.
board. Remove the shield.
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