General Information; Access Information - Fluke 8020A Instruction Manual

GENERAL INFORMATION

4-7.
Access lnformatlon
NOTE
To avoid contaminating the pcb with oilfrom
the fingers, handle it by the edges or wear
gloves. If the pcb does become contaminated
refer to the cleaning procedure given later in
this section.
4-9. CALIBRATION ACCESS
4-10. Use the following procedure to access the 8020A
calibration adjustments.
a. Set the power switch to OFF.
b. Disconnect test leads and battery eliminator if
attached.
Remove battery cover and
compartment.
d.
Remove the three phillips-head screws from the
bottom of the case.
e. Turn the instrument face-up and grasp the top
cover at both sides of the input connectors. Then,
pull the top cover from the unit.
f. All adjustments necessary to complete the
calibration procedure are now accessible (see
Figure 4-1).
*Shield must be in place when
making HF adjustment
Figure 4-1. Callbratlon Adjustment Locatlons
4-1 1.
4-12.
pcb assembly from the case.
a.
b.
c.
d.
battery from
4-13.
4-14.
the liquid crystal display.
a .
component/ pcb access procedure.
b.
c.
d.
COMPONENT/ PCB ACCESS
Use the following procedure to remove the main
Complete the calibration access procedure.
Remove screw from shield.
Using your index finger, lift the lower right-hand
corner of the pcb. When the pcb is freed, pull it to
the right until it clears the shelf under the buttons,
and then lift up.
To reassemble logically reverse this procedure.
NOTE
When installing pcb, route battery-clip wires
behind the post on the left-hand side of
bottom case, and thread battery-clip through
the battery-cover opening. Also make sure
that the removable plastic lip that resides
beneath the range switch pushbuttons is
properly installed in the bottom case. Green
power switch cap should also be mounted on
the power switch.
DISPLAY ACCESS
Use the following procedure to remove/replace
Remove the p c b assembly using t h e
Using your thumb carefully pull one of the white
display-lens snaps away from the lens. When
clear lift the lens away from the display.
CAUTION
Do not sllde the lens out of the dlsplay mount.
The display can now be lifted from the mount.
To reassemble the display logically reverse this
procedure.
NOTE
An Elastometric contact strip is locatedat the
When assembling the display this strip
should be located between the display andthe
pcb interconnect cable.