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GT7 BASIC SET-UP
STEP 4
TRANSMITTER ADJUSTMENTS
For proper ESC operation, adjust transmitter as follows:
A. Set HIGH ATV or EPA to maximum setting.
[amount of throw at full throttle]
B. Set LOW ATV, EPA, or ATL to maximum setting.
[amount of throw at full brakes]
C. Set EXPONENTIAL to zero setting.
[throttle channel linearity]
D. Set THROTTLE CHANNEL REV. SWITCH to either position.
E. Set THROTTLE CHANNEL TRIM to middle setting.
[adjusts neutral position/increases or decreases coast brakes]
F. Set ELECTRONIC TRIGGER THROW ADJUSTMENT to
70% throttle and 30% brake throw (or 7:3).
[adjusts trigger throw electronic/digital pistol-grip transmitters]
G. Set MECHANICAL TRIGGER THROW ADJUSTMENT
to position with 2/3 throttle and 1/3 brake throw.
[adjusts trigger throw on mechanical/analog pistol-grip transmitters]
Checking That Transmitter Has Adequate Throw
With transmitter ON, GT7 OFF & connected to receiver & battery:
1. PRESS & HOLD SPEED CONTROL'S SET BUTTON
2. TURN ON SPEED CONTROL'S POWER
3. HOLD SET BUTTON UNTIL RED, YELLOW, & BLUE LEDs ON
4. RELEASE SPEED CONTROL'S SET BUTTON
Once yellow, blue, & red LEDs (top 2 LEDs + bottom LED) turn on,
release the GT7's SET button. Red LED will stay on.
5. PULL TRANSMITTER THROTTLE IN DRIVE DIRECTION
Slowly pull throttle toward full drive––blue LED blinks until 500 S of
throw is reached then it turns solid. (adjust throw in Step A above)
6. PUSH TRANSMITTER THROTTLE IN BRAKE DIRECTION
Slowly push throttle toward full brake––yellow LED blinks until 200 S
of throw is reached then it turns solid. (adjust throw in Step B above)
Note: Without transmitter adjustments mentioned in Step A & B, ESC
will still program & operate normally with a minimum of 90 S of throw.
GT7 BASIC SET-UP
STEP 5
ONE-TOUCH PROGRAMMING
With GT7 connected to receiver & a charged battery pack:
1. TURN ON THE TRANSMITTER'S POWER
2. PRESS & HOLD SPEED CONTROL'S SET BUTTON
3. TURN ON THE SPEED CONTROL'S POWER
With transmitter throttle at neutral, and still pressing the
SET button, slide the GT7's ON/OFF switch to ON position.
4. HOLD GT7'S SET BUTTON UNTIL RED LED IS ON
Continue pressing SET button until the GT7's red status
LED turns solid red.
5. RELEASE GT7'S SET BUTTON WHEN LED IS RED
6. PULL TRANSMITTER THROTTLE TO FULL-ON POSITION
Hold it there until the green status LED turns solid green.
Note: Motor will not run during programming even if connected.
7. PUSH TRANSMITTER THROTTLE TO FULL-BRAKES
Hold it there until the green status LED blinks green.
8. RETURN TRANSMITTER THROTTLE TO NEUTRAL
Red status LED will turn solid red, indicating that throttle is
at neutral, and proper programming has been completed.
NOTE: If transmitter setting are changed, programming must be repeated.
If you experience any problems, turn off ESC and repeat programming.
OPTIONAL GT7 SET-UP
STEP 6
THROTTLE PROGRAM SELECTION
The GT7 is equipped with 7 user-selectable Throttle Programs
to choose from. The chart below shows how the different
Throttle Programs change the feel of the throttle response.
Refer to 'Factory-Installed Programs' chart below for Drive
Frequency, Minimum Drive, Brake Frequency, Deadband, and
Minimum Brake values for the factory installed Programs 1-7.
SMOOTH
FEEL:
7
1
2
3
PROGRAM#:
POSSIBLE
slick
smooth
aggr.
stock
APPLICATION tracks
modif.
modif.
Each Throttle Program is comprised of 3 parameters:
• Drive Profile--
Drive PWM Frequency, Minimum Drive, & #drive steps.
• Brake Profile--
Brake PWM Frequency & #braking steps.
• Minimum Brake Percentage--
1 of 7 settings from 20 to 55%.
[
Each Throttle Program stores its own Min.Brake setting independently
FACTORY - INSTALLED PROGRAMS 1 - 7
Program #:
1
2
3
Drive Frequency (kHz):
15
11
7.5
Minimum Drive (%):
3
2
2
Brake Frequency (kHz):
3.5
4
5.5
Deadband (%):
5
5
5
Minimum Brake (%):
20
20
20
NOTE: GT7 is factory set to Program #1.
Selecting Throttle Program
With the GT7 connected to a charged battery pack:
1. TURN ON THE SPEED CONTROL'S POWER
TRANSMITTER ON: Red status LED will be on, indicating
that speed control is at neutral.
TRANSMITTER OFF (or input harness disconnected):
When speed control is powered on and no input signal
is being received from the receiver, the green and red
status LEDs will both turn on solid. This acts as a system
check at all times to let you know the condition of the
connection between your receiver and the GT7.
2. PRESS & HOLD SPEED CONTROL'S SET BUTTON
Press and hold SET button on GT7 until all 4 LEDs turn on.
3. RELEASE SPEED CONTROL'S SET BUTTON
All status LEDs will flash together. The number of times
the LEDs flash indicates the Throttle Program selected.
4. PRESS & RELEASE SET BUTTON TO SELECT PROGRAM
Each press will change to the next consecutive Program.
5. WAIT FOR SPEED CONTROL TO EXIT PROGRAMMING
SET button not pressed for 3 sec.--ESC exits programming.
AFTER STEP 5, GT7 IS FULLY PROGRAMMED & READY TO RUN
(Your GT7 is now set-up just like our top factory drivers prefer it)
Steps 6 & 7 are considered optional & Step 8 is strictly advanced!
STEP 7
The GT7 lets you set the minimum braking force for each
of the 7 Throttle Programs––
independently
percentage of full-brakes
The 7 available choices are 20, 30, 35, 40, 45, 50, & 55%.
Brakes then range from selected value to 100% braking force.
Selecting Minimum Brake %--TRANSMITTER ON
With transmitter ON & GT7 connected to receiver and battery:
1. TURN ON THE SPEED CONTROL'S POWER
2. PRESS & HOLD SPEED CONTROL'S SET BUTTON
With transmitter throttle at neutral, press and hold SET
button on GT7 until all 4 LEDs turn on.
3. PUSH TRANSMITTER THROTTLE TO FULL-BRAKES
When the transmitter's throttle is moved to the full-brake
position while still pressing SET button on the GT7, only
the blue status LED will remain on (2nd LED from top).
(while holding SET button)
4. RELEASE SPEED CONTROL'S SET BUTTON
Blue status LED will flash. The number of times the LED
flashes indicates the Minimum Brake selection (1 of 7).
5. PRESS & RELEASE SET BUTTON TO CHANGE SELECTION
Each press will change to the next consecutive Minimum
Brake value.
6. WAIT FOR SPEED CONTROL TO EXIT PROGRAMMING
When SET button is not pressed for about 3 seconds, the
selected Minimum Brake value is loaded into memory.
The blue status LED will then flash a few times rapidly, then
the status LEDs will come on, one at a time, scrolling from top-
to-bottom indicating that you are exiting programming. The
red status LED will then turn on solid, indicating that the speed
control is at neutral and ready to go.
Selecting Minimum Brake %--WITHOUT TRANSMITTER
With the transmitter power OFF
1. TURN ON THE SPEED CONTROL'S POWER
Green and red status LEDs will both turn on solid
indicating no input signal is being received.
2. PRESS & HOLD SPEED CONTROL'S SET BUTTON
Continue to hold SET button on GT7 beyond the point
when all 4 LEDs turn on, until only the blue status LED is on.
3. RELEASE SPEED CONTROL'S SET BUTTON
Blue status LED will flash. The number of times the LED
flashes indicates the Minimum Brake selection (1 of 7).
4. PRESS & RELEASE SET BUTTON TO SELECT PROGRAM
Each press will change to the next consecutive Program.
5. WAIT FOR SPEED CONTROL TO EXIT PROGRAMMING
When SET button is not pressed for about 3 seconds, the
blue status LED flashes rapidly, the four status LEDs scroll
from top-to-bottom, and ESC exits back to neutral.
STEP 8
The GT7'S 7th Throttle Program can be customized to fine
tune the speed control to feel just the way you like it.
The 7th Throttle Program lets you tune the following items:
• Drive Profile--
Drive PWM Frequency, Minimum Drive %, & number of throttle steps
for the transmitter's forward/drive trigger throw).
• Brake Profile--
of Brake PWM Frequency & number of braking steps for brake throw).
• Braking Type--
Constant Force braking or DRAG BRAKE style braking).
• Minimum Brake Percentage--
See 'Custom Profile Data' chart (above/right) for Profile values.
Entering Program 7 Customizing Mode
AGGRESSIVE
With the transmitter power OFF
1. TURN ON THE SPEED CONTROL'S POWER
4
5
6
2. BE SURE THAT THROTTLE PROGRAM 7 IS ACTIVE
aggr.
oval
4-cell
If you are not sure that Program 7 is selected, follow the
stock
procedures in Step 6 to check/select Program 7.
3. DOUBLE-CLICK SPEED CONTROL'S SET BUTTON
With Program 7 active & speed control in neutral,
momentarily press & release SET button twice on GT7
to enter Program 7 customizing mode. All 4 LEDs will
turn on solid for about 1 second, then turn off. The green
]
status LED
will then flash to indicate the active Drive Profile.
4. PRESS & RELEASE SET BUTTON TO SELECT DRIVE PROFILE
Each press will change to the next consecutive Profile.
4
5
6
7
5. WAIT FOR SPEED CONTROL'S LED TO FLASH YELLOW
4.5
3.5
2
23
If SET button not pressed for 3 seconds, the Drive Profile is
stored into memory and either the yellow status LED
4
3
3
1
5.5
1.5
3
5.5
LED/"STD. BRAKE" on label)
5
5
5
5
LEDs/"DRAG BRAKE" on label)
active Constant Force or Drag Brake Profile
20
20
20
20
6. PRESS & RELEASE SET BUTTON TO SELECT BRAKE PROFILE
Each press will change to the next consecutive Profile.
7. PRESS & HOLD SET BUTTON TO SELECT BRAKING TYPE
If SET button is pressed and held for 3 seconds at any
time in customizing mode, the Braking Type is switched.
Yellow LED=Constant Force • Yellow & Blue LEDs=Drag Brake.
8. WAIT FOR SPEED CONTROL'S LED TO FLASH BLUE
If SET button is not pressed for 3 seconds, Brake Profile is
stored into memory and blue status LED
marked "MIN. BRAKE" on label)
active Minimum Brake setting.
9. PRESS & RELEASE SET BUTTON TO SELECT MIN. BRAKE
Each press will change to the next consecutive setting.
10. LEDs SCROLL UP & DOWN, THEN PROGRAMMING
LOOP STARTS OVER AT SELECT DRIVE PROFILE
Pressing SET button during LED scroll lets you exit the
customizing mode. If you do not press the SET button,
the programming loop will repeat itself 3 more times,
before exiting the customizing mode by itself.
Restoring Programming to GT7 Factory Defaults
Every time you perform the One-Touch Set-Up, the GT7's factory default
programming values are restored. This is also the only way to get
back to the original 7th Program with 23kHz.
OPTIONAL GT7 SET-UP
MINIMUM BRAKE ADJUSTMENT
each Program stores its own value
. The value for the minimum braking force is a
(transmitter's throttle at full-brake position)
(After value #7, the sequence begins again at value #1)
(or input harness disconnected)
ADVANCED PROGRAMMING
CUSTOMIZING PROGRAM 7
1 of 5 Drive Profiles (each profile is comprised of
1 of 5 Brake Profiles (each Brake Profile is comprised
1 of 2 types of braking styles (STD.BRAKE--Novak's
1 of 7 settings from 20 to 55%.
(or input harness disconnected)
(3rd LED down/marked "DRIVE PROFILE" on label)
or the yellow & blue LEDs
will then flash to indicate the
(select in Step 7).
(2nd LED down/
will then flash to indicate the
PROGRAM 7 CUSTOM PROFILE DATA
Drive Profile:
Drive PWM Frequency (kHz):
Minimum Drive (%):
Std. Brake Profile:
Brake PWM Frequency (kHz):
.
Drag Brake Profile:
Brake PWM Frequecny (kHz):
Drag Brake Frequency (kHz):
RECEIVER BATTERY PACK
If using an external receiver battery pack with the GT7:
1. Plug an external 5 cell (1.2VDC/cell) receiver battery pack
into the battery slot of the receiver.
2. Leave the GT7's ON/OFF switch in the OFF position.
3. Use receiver battery pack's ON/OFF switch to turn the
system power on and off––Do not use the GT7's switch.
TROUBLE-SHOOTING GUIDE
This section describes possible ESC problems, causes, and solutions.
Steering Channel Works But Motor Will Not Run
• Check motor connections. Check motor and brushes.
• Make sure input signal harness is plugged into throttle channel of
receiver and the ESC. Check throttle channel operation with a
servo. Check wiring color sequence of receiver signal harness.
• Possible internal damage––Refer to Service Procedures.
Receiver Glitches/Throttle Stutters During Acceleration
• Receiver or antenna too close to speed control, power wires,
battery, or motor––Refer to Step 2.
• Bad connections––Check wiring and connectors.
:
• Motor brushes worn––Replace brushes.
• Excessive motor current––Use milder motor or smaller pinion gear.
• External Power Capacitor damaged/not installed––Refer to Step
3/Replace Power Capacitor (possible internal damage).
Motor and Steering Servo Do Not Work
• Check wires, receiver signal harness wiring & color sequence, radio
system, crystals, battery & motor connectors, and battery pack.
• Possible internal damage––Refer to Service Procedures.
Model Runs Slowly/Slow Acceleration
• Check motor and battery connectors––Replace if needed.
• Bad battery or motor––Check operation with another.
• Incorrect transmitter/ESC adjustment––Refer to Steps 4 & 5.
• External Power Capacitor damaged/not installed––Refer to Step
3/Replace Power Capacitor (possible internal damage).
• External Schottky diode damaged––check that diode is installed
correctly/Refer to Step 3.
Motor Runs Backwards
• Motor wired backwards––Check wiring and reverse.
• Backwards motor timing––Reverse motor end bell.
ESC Is Melted Or Burnt/ESC Runs With Switch Off
• Internal damage––Refer to Service Procedures.
*For more assistance call our Customer Service Department.
SERVICE PROCEDURES
Before sending your GT7 in for service, review the Trouble-
Shooting guide and instructions. The speed control may
appear to have failed when other problems exist.
After reviewing the instructions, if you feel that your GT7
requires service, please obtain the most current product
service options and pricing by one of the following methods:
WEBSITE:
Print a copy of the PRODUCT SERVICE FORM from the
SERVICE section of the website. Fill out the needed information on
this form and return it with the Novak product that requires servicing.
PHONE/FAX/E-MAIL:
If you do not have access to the internet,
contact our customer service department by phone, e-mail, or fax
as listed in the CUSTOMER SERVICE section below.
WARRANTY SERVICE:
For warranty work, you MUST CLAIM
:
WARRANTY on the PRODUCT SERVICE FORM and include a valid
cash register receipt with purchase date on it, or an invoice from
previous service work. If warranty provisions have been voided,
there will be service charges.
ADDITIONAL NOTES:
• Hobby dealers or distributors are not authorized to replace Novak
products thought to be defective.
• If a hobby dealer returns your speed control for service, submit a
completed PRODUCT SERVICE FORM to the dealer and make
sure it is included with the speed control.
• Novak Electronics, Inc. does not make any electronic components
(transistors, resistors, etc.) available for sale.
PRODUCT WARRANTY
The GT7 speed control is guaranteed to be free from defects in materials or
workmanship for a period of 120 days from the original date of purchase
(verified by dated, itemized sales receipt). Warranty does not cover incorrect
installation, components worn by use, damage to case, damage from using
fewer than 4 or more than 6 cells (1.2 volts DC/cell) input voltage, cross-
(top
connection of battery/motor, overheating solder tabs, reverse voltage
(top 2
application, damage resulting from thermal overload, damage from incorrect
installation of FET servo or receiver battery pack, not installing three 0.1 F
(50V) capacitors on motor, not installing or incorrect installation of a Novak
power capacitor on the ESC, splices to input harness, damage from excessive
force when using the One-Touch/SET button or from disassembling case,
tampering with internal electronics, allowing water, moisture, or any other
foreign material to enter ESC or get onto the PC board, incorrect installation/
wiring of input plug plastic, allowing exposed wiring or solder tabs to short-
circuit, or any damage caused by a crash, flooding, or act of God.
In no case shall our liability exceed the product's original cost. We
reserve the right to modify warranty provisions without notice.
Because Novak Electronics, Inc. has no control over the connection and use
of the speed control or other related electronics, no liability may be
assumed nor will be accepted for any damage resulting from the use of this
product. Every Novak speed control is thoroughly tested and cycled before
leaving our facility and is, therefore, considered operational. By the act of
connecting/operating speed control, the user accepts all resulting liability.
CUSTOMER SERVICE
NOVAK ELECTRONICS, INC.
Monday-Thursday:
8:00am-5:00pm (PST)
Friday:
8:00am-4:00pm
(949) 833-8873 • FAX (949) 833-1631
e-mail: cs@teamnovak.com
web: www.teamnovak.com
©2002 Novak Electronics, Inc. • All Rights Reserved • No part of these operating
instructions may be reproduced without the written permission of Novak
Electronics, Inc. • GT7 Programmable Racing ESC, Variable Throttle Step Technology,
Polar Drive Technology, Radio Priority Circuitry, & One-Touch Set-Up are all
trademarks of Novak Electronics, Inc. • All Novak speed controls are designed &
manufactured in the U.S.A.
Printed in the U.S.A. 8/2002 • #IM-1785-1
1
2
3
4
5
1
5.5
12
15
20
3
3
3
3
2
1
2
3
4
5
2.5
3.5
5.5
8
11
1
2
3
4
5
2.5
3.5
5.5
8
11
2.5
3.5
5.5
8
11
(closed every other Friday)
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