I-14
Transmitter/Receiver
Note
: It is imperative that you fully charge both the
transmitter and the receiver battery packs prior to each
flying session and that you check the condition of the
receiver battery between each flight using a reliable battery
tester with a built-in load. The included wall charger
charges at a 250mA rate. In order to fully charge the
included batteries, it’s necessary to leave the charger and
batteries hooked up to the included wall charger for 8–10
hours.
An optional fast charger can be used to charge both the
transmitter and receiver batteries, however, it’s imperative that
the batteries are properly charged and the charge condition
be checked prior to flight. “False Peaking” is a common
occurrence with many fast chargers/ batteries, giving an
indication that the battery is fully charged when in fact the
battery is only partially charged. False Peaking can lead to
disastrous results and it is the pilot’s responsibility to verify the
charge condition of the batteries before every flight. (Also see
Receiver Power Requirements page I-26.)
JR Transmitter Charging
The center pin on all JR
®
transmitters is negative. Therefore,
the center pin on all JR chargers is negative, not positive. This
is different from many other manufacturers’ chargers and radio
systems. Beware of improper connections based on “color-
coded” wire leads, as they may not apply in this instance. You
must make sure that the center pin of your JR transmitter is
always connected to the negative pole for correct polarity.
Note
: When using a fast charger to charge the transmitter
battery, do not exceed 1.5 amps (or 1500mA) charge rate
or damage to the transmitter or battery can occur.
Using the Included Charger
The pilot lamps should always be on during the charging
operation. If not, check to make sure that both the transmitter
and receiver are switched off.
Do not use the charger for equipment other than JR. The
charging plug polarity may not be the same. Equipment damage
can result.
Do not use other manufacturers’ after-market accessories that
plug into the transmitter’s charging jack if you are unsure of
the polarity compatibility with your radio. Seek expert advice to
avoid possible damage.
During the charging operation, the charger’s temperature is
slightly elevated.
Charging
Charger Pigtail for Transmitter
Transmitter Charge Jack Polarity
BLACK TO POSITIVE
BLACK W/WHITE STRIPE TO NEGATIVE
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Summary of Contents for JR DSM 12X
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