4. Other Field Service Ver. 1.0 Aug. 2005
10
FS-508/PU-501/OT-601
Maintenance
4. Other
4.1 Disassembly/Adjustment prohibited items
A. Screws to which blue paint or green paint is applied
• Blue paint or green paint is applied to some screws to prevent them from coming
loose.
• As a general rule, screws to which blue paint or green paint is applied should not
be removed or loosened.
B. Red-painted screws
• Do not remove or loosen any of the red-painted screws in the field. It should also
be noted that, when two or more screws are used for a single part, only one repre-
sentative screw may be marked with the red paint.
C. Variable Resistors on Board
NOTE
• Do not turn the variable resistors on boards for which no adjusting instructions
are given in Adjustment/Setting.
D. Removal of PWBs
Caution
• When removing a circuit board or other electrical component, refer to “SAFETY
AND IMPORTANT WARNING ITEMS” and follow the corresponding removal proce-
dures.
• The removal procedures given in the following omit the removal of connectors and
screws securing the circuit board support or circuit board.
• When it is absolutely necessary to touch the ICs and other electrical components
on the board, be sure to ground your body.
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