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MODEL 1000N
TAKING THE INSTRUMENT APART:
Necessary Tools:
• Standard screwdriver
• 30 W soldering iron
• Desoldering iron
• Phillips No 2 screwdriver
IMPORTANT: This is a high precision instrument. It is very important to keep the printed circuit
boards absolutely clean. Do not touch the circuit boards with fingers and prevent
foreign substances from coming into contact with the boards.
A) Opening the Battery Compartment:
• Be sure the push-to-measure button is up (instrument off).
• Place the instrument on the table with the front panel down and loosen the four embedded
screws holding the battery compartment closed. Pick up the instrument with one hand and
turn it over while covering the open battery compartment with the other hand. This allows the
battery pack to be removed easily. Then place the instrument back on the table with the front
panel down while holding the exposed battery pack. Be careful not to damage the battery
connector when disconnecting it.
B) Removing the Bottom Case:
• Be sure the push-to-measure button is up (instrument off).
• Place the instrument on the table with the front panel down.
• Use a screwdriver to loosen the two center screws which secure the bottom panel.
• Lift up the bottom panel and turn it upside down in order to let the two screws drop out.
• Set the bottom down and disconnect the battery connector.
• During reassembly, the same procedure should be done in reverse order.
C) Removing the Printed Circuit Board Assembly:
• The push-to-measure button must be engaged in order to lock the spring and ball mounted
within the cap.
• Set the instrument upon the table with the front panel facing downward (after removal of the
front panel). Use a Philips screwdriver to loosen the three fastening screws holding the
bottom board to the front panel.
• With a standard screwdriver, unscrew the large center screw beneath the printed circuit
assembly. Remove all the screws and desolder the wire from the green terminal. The board
assembly can now be lifted slightly to allow the desoldering of the shielded cable, its ground
connection, and the red wire from the blue terminal.
• In order to remove the set of printed boards from the case, pull the high voltage transformer
forward and tilt the boards over the table before unsoldering the two galvanometer wires.
4/21/2005
REPAIR AND CALIBRATION MANUAL
14
REV. 7: March 13, 2004
FILE LOCATION: Manuals - Cal. Man - 1000MAN.DOC
CAT. #185.100
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