Control Panel - Fisher M-Scope 1280-X Aquanaut Operating Manual

BATTERY REPLACEMENT
Eight 1.5V size AA batteries are located in the rear section of the
Control Housing. The batteries are sealed off from the electronics
so that accidental water leakage into the battery compartment
will not damage the circuitry.
1. Remove the battery cover by partially unscrewing
the two knurled thumb screws with a coin. (The
knurled knobs are "captive screws" and do not
have to be completely removed from the battery
cover.)
2. Remove the battery pack from the Control
Housing and disconnect the battery lead connector.
Be very careful not to put any undue strain on the
battery leads.
3. Remove the batteries from the battery packs.
Note the polarity markings inside the pack and install
fresh batteries.
4. Reconnect the battery lead.
5. Insert the battery pack into the Control Housing
with the lead connector up, on the right side. Fold
the leads across the top of the pack.
6. Make sure the O-Ring and both sealing surfaces
are clean before reinstalling the battery cover. THIS
IS EXTREMELY IMPORTANT.
7. Finger tighten the thumb screws, then carefully
tighten again one-quarter turn with a coin.
BATTERY RECHARGING
Rechargeable nicad batteries may take as many as 1,000
recharges, however they do have some limitations you should
be aware of:
1. Nicads will last only about half as long as
standard carbon-zinc batteries before recharging
is required.
2. Nicads may develop a "memory" if you give
them repeated "booster" charges. In other words,
if you charge your batteries over and over again
for only three hours at a time, the batteries will
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1280Xmanual-870246.indd 7

CONTROL PANEL

1. POWER/VOLUME CONTROL: Turns the power on
and off. Also controls the target response volume
in the headphones. The volume control should be
set no louder than comfortable when the search
coil is passed over a large, close target.
2. DISCRIMINATION CONTROL: A full range trash
rejection control. All types of metal are detected
at the zero level and most small pieces of trash are
eliminated at the maximum level of ten.
3. LED: The clear plastic window between the
SENSITIVITY and VOLUME controls contains an LED
(Light Emitting Diode) which flashes red when
a target is detected or the batteries are being
tested.
4. BATTERY TEST/SENSITIVITY CONTROL: Checks
battery condition and controls the sensitivity to
targets. A setting of 10 gives maximum sensitivity
and is used for most treasure hunting conditions.
To check the batteries, turn the VOLUME control to
10 and click the BATTERY TEST/SENSITIVITY control
momentarily in and out of the "Battery Test"
position. Fully charged batteries will give a loud
tone in the earphones and a bright red light in the
LED window. Weak batteries will give a faint tone
and a dim light. It's time to replace the batteries
when the light goes out.
Figure 4. Control Panel
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