Futaba MC850C - Manual (Page 2)

N
N
N
CONNECTION
LED DISPLAY
Negative (-M) motor
Positive (+B) battery
(+M) motor
Receiver connector
Connects to the receiver
throttle channel (CH2).
Power switch
Pushbutton switch
LED
Terminal cover
Negative (-B) battery
Negative terminal mark
POWER CAPACITORS
Power Capacitor stores battery energy and supplies this
to the motor additionally when extra power is required.
[Reference]
The MC850C has excellent acceleration and throttle
follow-up, but use this power capacitor when the course
to be run requires more than maximum power. However,
on a small technical course, not using the power
capacitor may also be effective.
[INSTALLATION]
See the pictures for the example of installation.
1 Remove the terminal cover from the MC850C.
2 Use the included heat shrink tube to isolate the pins of the
Power Capacitor. This will also make it easier to indicate the
polarity of the Power Capacitor. Place the red heat shrink tube
on the positive terminal and the black heat shrink tube on the
negative terminal.
3 The Power Capacitor needs to be soldered to the speed control
between + (positive = M.B.+ ) and - (negative = BAT.-).
4 Attach the terminal cover to the MC850C.
[Wiring Precautions]
• Always set the MC850C power switch to the OFF position before
performing any wiring.
• When stripping the covering of the silicon cord to the length
needed for soldering, be sure not to cut the center conductor with
the cutter or nippers.
• Refer to the diagram above and check the polarity before
performing wiring. (The 3 colors, red, blue, and black, of the
silicon cord indicate the polarity.)
• When soldering to the terminals of the MC850C, remove the
terminal cover. (After soldering, re-install the terminal cover.)
Heat shrink tube
(positive = red / negative = black)
Never reverse the capacitor,schottky diode and wires
polarity.
The capacitor may break or the capacitor electrolyte may leak.
The schottky diode breaks.
Reverse connection will immediately destroy the amp.
Never use solder containing acid flux.
Use solder containing rosin flux only. Do not inhale the solder
vapours. This might damage health.
Vibrationproof the capacitor by mounting it with thick
double sided tape.
If the pin of the capacitor is broken, it may short-circuit with the pin
between + and - terminal of the speed control.
Be careful when soldering to the tags on the speed control;
don’t overheat the tags with your soldering iron and take
great care to avoid short-circuits between two of the three
tags on the speed control.
Such a short-circuit would destroy the speed control.
Silicone flex wire Red
Silicone flex wire Blue
Silicone flex wireBlack
In set-up mode MC850C stores every step when you press the Set-up button. All the settings are stored in the unit even when the
speed control is subsequently disconnected from the battery. Set up the following basic functions on your transmitter (if present):
• High ATV, EPA (throttle travel) - maximum Low ATV, EPA, ATL (brake travel) - maximum
• EXP, EXPO (exponential) - start with 0
• SUB trim (neutral trim) - center TH trim - center
• Throttle reverse (servo reverse) - any setting; must not be changed after completion of set-up procedure.
• Asymmetrical stick travel is possible (2/3 throttle - 1/3 brake)
If your transmitter does not feature these set-up functions, it is already in “basic set-up” mode.
Remove the motor pinion, or ensure in some other way that the wheels of the model are free to rotate.
• Switch the transmitter on.
• Set the transmitter throttle stick to neutral, and then switch the speed control on.
• Depending on the neutral position of the throttle stick, the red and green LED will blink simultaneously (orange) and a beeping
sound will be repeated. (Alarm: Waiting for neutral data)
Turn on the power in following order.
• The SET LED flashes green, to indicate that the unit is in set-up mode.
• This completes the set-up procedure.
Hold the SET button pressed in for at least 3 seconds using the small screwdriver supplied.
Motors with no suppressor capacitors, or
inadequate suppression, may cause the MC850C
to malfunction. Always solder the capacitors
supplied to your motor.
The schottky diode improves the efficiency of
the speed control / motor combination and
provides extra protection to the brake FETs. The
white ring must always face the positive side.
Schottky diode
Suppressor capacitors
Solder the suppressor capacitors and the
Schottky diode to the motor.
©FUTABA CORPORATION 2007,02
MC850C
Protection Circuits
Heat protection: After FET overheating is detected, the output to the motor is gradually lowered and when 125 degress is reached, a
protection circuit operation alarm is activated and output to the motor is cut. The protection circuit is automatically reset by a drop in
the FET temperature.
Low battery protection: When the power supply voltage drops, the output current to the motor is limited and supply voltage to the
receiver is ensured. When the power supply voltage drops to the set voltage (initial setting 3.0V), a protection circuit operation alarm is
activated and output to the motor is cut. The protection circuit is automatically reset by recovery of the power supply voltage.
MC850C
I
NSTRUCTION
M
ANUAL
Terminal
cover
SET button operation LED
Neutral
point
setting
High
point
setting
Brake MAX
point
setting
• Neutral state
The MC850C operating state can be checked with the LED as shown below.
flashes red and the motor beeps.
*Not used with PCM receivers.
*When the transmitter if OFF, this function is not performed
in environments such that the servo operates erroneously
Off
On (green) On (red)
Neutral
point
High
point
Brake MAX
point
Brake Foward
On (red)
*Becomes
brighter nearer
the MAX point.
On (green)
*Becomes
brighter nearer
the high point.
LED
LED
* The confirmation beep sounds only when the motor was connected.
(-;negative)
(+;positive)
(-;negative) (+;positive)
SET UP
• Full brake
state
• Full high
state
• Press SET button
once.
• Press SET button
once.
• Press SET button
once.
LED goes out and the
motor beeps.
flashes green two times
and the motor beeps.
LED goes out
flashes orange and the motor beeps. flashes orange and the motor beeps. flashes red and the motor beeps.
flashes green three times
and the motor beeps.
LED goes out
* Since the data is read at the end of setting
of all points, the points cannot be set
independently.
* If the amp power was turned off during
setting, the setting points cannot be
memorized. (The previous settings are
retained.)
* The confirmation beep sounds only when
the motor was connected.
* If you make a mistake during the set-up
procedure, an setting is not completed.:
switch MC850C off and start again from
the first step.
* Check the operation by the following "LED
DISPLAY." When throttle operation and
the CHECKER LED DISPLAY are not
correct, set up again from the first step.
(Amp power left on alarm)
When the transmitter power
was turned off first.
*at Neutral Brake:
On (green or red)
*When the switch of speed control is turned ON
ahead of a transmitter.
*When the neutral position of a transmitter
differs from the last setup.
(Alarm when waiting for the data of a
neutral point)
Operation
Cause
(Protection circuit operation)
When a protection circuit operates.
(Data error alarm)
Displayed when an abnormal
signal was input.
Transmitter throttle
operation
3
4
5
1
2
FUTABA CORPORATION Makuhari Techno Garden Bldg., B6F 1-3 Nakase, Mihama-ku, Chiba 261-8555, Japan Phone: (043) 296-5119 Facsimile: (043) 296-5124