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board.
APPLICATION
Antenna Bushing Spanner Nut
Back Shield to Frame Screws
Bottom Connector to Frame Screws
Frequency Switch Spanner Nut
All Module Screws
Power Contact Screws
Slotted-Spanner Nut (Baseplate)
Top Panel to Frame Screws
Volume Pot Spanner Nut
8
•
Some modules are fastened to the main board and
frame with screws; remove these screws before
attempting to unplug a module.
any screw.
•
Several of the modules are designed to be
removed with a standard DIP extractor tool (OK-1
or equivalent). Always use the extractor tool when
removing these modules to avoid damaging their
leads.
•
Some modules have guide pins to assist in inser-
tion or removal. Pressure may be applied to these
guide pins to aid removal of a module if, and only
if, it is distributed evenly over all guide pins on the
module. Applying all the force to a single guide pin
will cause severe damage to the module.
•
The secure module (U900) is not serviceable.
•
Before reinserting any module, always check its
leads for damage. Gently straighten any leads that
may be bent; replace any modules with severely
damaged leads.
Before reinserting reference oscillator module
U301 into the main circuit board, be certain that its
squared (pin 1) corner is correctly oriented per the
main circuit board component layout diagram.
•
When electrically testing and/or probing the main
TORQUE SPECIFICATIONS
TORQUE
TORQUE
(IN. LBS.)
20
2.5
2.5
8
2.5
2.5
6
2
8
CAUTION
Inspect the frame stud seals and the top
panel O-ring and replace if any damage
exists.
TORQUE
(N•m)
BIT NO.
2.27
6680370B90
0.28
6680321B79
0.28
6680321B79
0.91
6680370B88
0.28
6680321B79
0.28
6680321B79
0.68
6680370B89
0.23
6680321B79
0.91
6680370B88
Never substitute
•
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