Introduction

This is the main index to the Service Manual information for the NCC series controllers.

Most of these pages refer specifically to the Mark 1 controllers but the information is also relevant to the Mark 2 version. Furthermore, since the VTX series use very much the same circuitry as the Mk 2 NCC, most of the information is also relevant to these controllers.

Pages here are added/amended as the need arises so if you need further information, use the contact button to contact support and say which page you want help with!

Modern controllers are so reliable that the information herein does not get a lot of use and it is therefore not our intention to update these pages for the more recent issues.

Be warned that that, though the information herein is supplied in good faith, if you decide to attempt D I Y repairs, 4QD can accept no responsibility for the consequences. Furthermore, if the controller has been so repaired, 4QD may refuse to service it.

Contents

• Circuit Description, Issues 18-24
• Circuit Diagram, Issues 18-24
• Circuit Diagram, Mark 2 NCC VTX is similar.
• Component layout, Issues 18-24
• Current limit, Pro series applies to NCC also, as circuit is the same here.
• Input Deadband
• Expansion connector fitting up to issue 17.
• Expansion connector fitting Pro and NCC, issue 20 and later.
• Fault finding, general
• Fault finding, general. Expanded information.
• Instruction manual
• Joystick Interfaces including DCI-111.
• Key components - to identify some of the bits that customers manage to blow!
• Modification history general
• History, Issues 18-24
• History Mark 2
• MOSFET gate drive waveforms and testing.
• MOSFETs Specifications and replacements
• Parking brake driver adding
• Parts List
• Powering and protection mechanisms
• Ramps rates - reducing
• Reversed battery, effects of
• Series Wound motors - modification
• Switching Waveforms and Servicing
• Voltages changing the operating voltage.
• Zener Diode and pot fault transistor failure.

Other relevant pages