User Manual

ManualsBrandsJR ManualsHobbySC-1 Fwd/Rev Speed Control

Thank you for choosing the JR Racing brand.

Your satisfaction is our number one priority. With

this in mind, we have produced this product to be

of the highest quality, performance and reliability.

We hope it provides you with hours of enjoyment

in your next RC project.

• High-power FET control with proportional

forward and reverse

• High-frequency design delivers smooth

acceleration

• Automatic Thermal Overload Protection

prevents damage from excessive current or

short circuits

• Prewired with Tamiya battery plug, bullet-style

motor connectors, and universal receiver plug

that fit JR, Hitec, Airtronics Z, Futaba and

new KO radios

• Designed to operate with stock to mild

modified motors (15 turns or higher)

• One-touch programming makes setup a breeze

Operation: ...... Proportional forward, proportional

reverse with brake

Input Voltage: ..................... 6-cell (7.2 volts) or

7-cell (8.4 volts) DC

Peak Current: .................................... 640 amps

Continuous Current: ........................ 160 amps

Full-On Resistance: .............. 0.00175 ohms x2

Frequency: ........................................... 1500 Hz

BEC output: ...................... 6 VDC, 1 amp max.

Overload Protection: ........................... Thermal

Dimensions: ....................... 1.45" x 1.71" x 0.89"

(36mm x 43mm x 22 mm)

Weight: ................................................... 1.92 oz

Note: Be sure all wiring connections can

be reached prior to mounting.

Mount the SC-1 ESC in the location specified

by your vehicles instruction manual. Use the

double-sided foam tape (included) to secure the

speed control in position and to secure the side

of the switch to a convenient location on the

chassis or shock tower.

Note: The SC-1 uses the motor battery to

supply power to the receiver through the

servo wires. There is no need for a

separate receiver battery.

• See your radio’s instruction manual for proper

connection. Typically, channel 2 is used to

control the throttle.

• There are three wires involved in the universal

receiver connector. It is directly compatible

with JR, Hitec, Airtronics Z, Futaba and new

KO systems.

• Older Airtronics or KO radio systems must use

a modified wiring order:

1. The positive (red) and negative (brown) wires

must be reversed to operate with these radio

systems. To remove the wires from the plug

use a small jewelers screwdriver to pry up the

plastic tab associated with each wire. Gently

slide the brown wire out of the plug. Repeat

on the red wire and replace in the opposite

positions.

2. Install the plug referencing the wire colors on

the steering servo for proper polarity.

3. Install the plug. Reference the wire colors on

the steering servo for proper polarity.

If the motor (15 turns or more) you are using

does not have three capacitors already attached,

you must install them. Check with your local

hobby shop for more information. The supplied

monolithic capacitors help prevent motor noise,

which lessens radio glitches.

1. Using a small file, scuff up

an area on the motor can

between the positive and

negative tabs (see Figure 2).

2. Take one of the capacitors

and solder one wire to the

positive motor tab with the

other wire positioned over

the scuffed area on the

motor housing (see Figure 3).

3. Use another capacitor and

solder one wire to the

negative motor tab with the

other wire positioned over

the scuffed area as well.

4. Solder both wires to the

motor housing (see

Figure 4). A high-wattage

soldering iron may be

necessary.

5. Solder the third capacitor

from the positive to the

negative motor tabs (see

Figure 5).

6. Use side cutters to remove

excess capacitor wires.

Some forward-only ESCs require a Shottky

diode attached to the motor for noise

suppression. Be certain there is not a diode

attached to the motor when using the SC-1 or

any other reversing electronic speed control.

If your motor has pre-attached male bullet

connectors, press the red motor wire into the

plug that is wired to the positive motor terminal.

The black wire is connected in the same manner

to the negative motor tab (see Figure 6).

If your motor does not have male bullet

connectors, you may purchase a Motor

Connector Wire (DLR1055) from your

local hobby shop .

Caution: To detour

glitches caused by

RF (radio frequency)

noise, route all wires

and the receiver antenna

away from motor leads.

Secure with tie wraps

(not included).

The SC-1 comes prewired with a Tamiya-style

connector that is compatible with most battery

packs. Use either a 6-cell (7.2-volt) or 7-cell

(8.4-volt) Sub-C size battery pack.

1. Be sure the On/Off switch is in the Off

position.

2. Connect a fully charged battery pack to the

speed control’s battery connector.

Note: Refer to the radio instructions for

specific information on transmitter setup.

1. Set the Throttle Reversing switch to the

NORMAL position. (This may need to be

reversed on some brands of radios).

2. Set the Throttle Trim to the CENTER

position.

3. Set the Throttle Exponential (if applicable)

to MINIMUM or ZERO.

Features

Mounting the Speed Control

Wiring the Receiver

Motor Capacitors

Adjusting the Transmitter

Connecting the Battery

Specifications

Figure 2

Figure 5

Figure 6

Black Wire

(-) Negative

Red Wire

(+) Positive

Figure 3

Figure 4

Connecting the Motor Wires

Diagram

Instruction Manual

SC-1

Figure 1

CONNECT ESC

TO CH. 2

POWER

SWITCH

TAMIYA 7.2V

CONNECTOR

SC-1

MOTOR

BATTERY PACK

7.2–8.4V

STEERING

SERVO

2-COLOR

LED

HEAT

SINKS

SETUP

BUTTON

Motor Capacitors

Electronic Speed Control (ESC)

with Reverse

Connecting the Motor Wires

Summary of content (2 pages)

PAGE 1
• One -touch programming makes setup a breeze • Designed to operate with stock to mild modified motors (15 turns or higher) • Prewired with Tamiya battery plug, bullet-style motor connectors, and universal receiver plug that fit JR, Hitec, Airtronics Z, Futaba and new KO radios • Automatic Thermal Overload Protection prevents damage from excessive current or short circuits • High-frequency design delivers smooth acceleration • High-power FET control with proportional forward and reverse Features Than
PAGE 2
To prevent inadvertent reverse operation, the SC-1 Electronic Speed Control requires two consecutive reverse throttle inputs to enter the Reverse mode. Operational Information 4. Move the transmitter control to full throttle and press the Setup button. The LED will flash twice, indicating full throttle has been set. Move the transmitter control to the full reverse position and press the Setup button. The LED will flash three times, indicating full reverse has been set and programming is complete. 3.