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Web:www.laisdcc.com    E-mail:[email protected]

 

2002-2015 ©laisdcc             Design in HK, Made in China 

LaisDcc Decoder Manual

 

Thank you for purchasing LaisDcc decoders.  We are sure that out of the packet, it will do everything you 

need and deliver smooth, reliable results with a minimum of fuss because from the very beginning what we 

set out to do was to create a versatile, easy to install and simple to adjust range of products that offer 

exceptional value and top quality performance when used with any NMRA compatible control system. 

Similarly we have done our best to make this manual direct and easy to understand so you will be 

encouraged to learn a little about how simple it is to do much more than just set addresses and so be able to 

enjoy the process and benefits of getting the best possible performance from your locomotives. 

In its initial form, this manual will cover all of the basics, however there are so many special features   

available from our decoders that we felt it best to limit this document to things that most modelers can do or 

will want to do when they are comfortable with their control system… 

Table of contents:

 

(1)

General Specifications for LaisDcc decoders:

(2)

Primary feature listing for LaisDcc decoders:

(3)

Addressing and first steps in decoder set up.

(4)

Basic wiring and description of related wire color codes

(5)

Conceptual installation diagrams for steam and diesel

(6)

Description of functions and related wire color codes.

(7)

Changing the way that a function acts and activating special light functions:

(8)

Changing which controller button acts on or activates each function:

(9)

Tuning and adjusting the motor control in your LaisDcc Decoder

(10)

Other useful things that LaisDcc decoders can do:

(11)

Locking the decoder

(12)

CV29 – the CV that’s often mentioned… but you should not really need to adjust!

(13)

Troubleshooting

General Specifications for LaisDcc decoders:

 

Power Handling:

 

All  LaisDcc  decoders  have  more  than  adequate  power  for  any  N,  TT,  HO,  OO,  On30  or  similar  modelling 

scale. They are also suitable for many S or O scale models when powered with modern low current draw can 

or coreless motors. 

We set our decoder specifications at “Standards compatible” NMRA track voltages – please be aware that 

while US based systems meet this specification all of the time, many EU made controllers will often have 

track voltages well in excess of DCC standards recommendations and while our decoders will still perform 

reliably and well irrespective of your systems actual output voltage, we do suggest that if it is higher than the 

standards say it should be then a slightly more conservative current draw rating should be assumed. 

In general, providing your locomotive draws less than 1 amp consistently with an average train, then you 

should use them with confidence. If your locomotive is old with an inefficient motor that draws more than ¾ of 

our rated decoder power consistently, then we do suggest that when slipping or under excess load it may 

We have released new manual V2 at http://laisdcc.com/LaisDcc_Decoders_Manual_V2.pdf

Summary of Contents for 860012

Page 1: ...nd related wire color codes 7 Changing the way that a function acts and activating special light functions 8 Changing which controller button acts on or activates each function 9 Tuning and adjusting the motor control in your LaisDcc Decoder 10 Other useful things that LaisDcc decoders can do 11 Locking the decoder 12 CV29 the CV that s often mentioned but you should not really need to adjust 13 T...

Page 2: ...n set in your LaisDcc decoder then don t worry Just enter programming track mode with your controller and either read the address or reset the decoder to its default address of three by entering 2 into CV8 Harnesses 860021 An 8 pin NEM652 plug with wires dressed to the UK standard N S or lengthwise orientation The 4 Fn decoder will also have Fn4 Aux2 as a free purple wire 860019 With 21MTC interfa...

Page 3: ...now that many of our decoders will be used by new or inexperienced modelers we have limited short address changes to the programming track as entry level controllers are not always easy to use and often lack reliable Program on the main abilities Adjustment All programming with the exception of short addresses can be set either on the main or on the programming track Many adjustments to decoder se...

Page 4: ...mple if it is set to 6 make it 2 if it is set to 38 make it 34 Functions LaisDcc decoders have 4 functions which are switched on and off via the function control buttons of your handset Functions 1 white and 2 yellow are preset at the factory for directional front and rear lights and will automatically turn on and off depending on locomotive direction they can also be turned on and off with the he...

Page 5: ...b side number so they do not have to remember a list of numbers Which number you choose is up to you of course however there are TWO types of address available to you so read on before you do anything please Short Address This is not really a 2 Digit number as many think It is in fact a 1 BYTE address in binary terms and so it can depending on your DCC system brand be either from 1 to 99 or from 1...

Page 6: ...ck Loco pickups By convention usually the left side of the loco Pin 5 Gray Motor wire usually the lower or left brush Pin 6 White Front light function also known as function 1 Default setting operate with light button Pin 7 Blue Common positive wire for all active functions Pin 8 Red To track Loco pickups By convention usually the right side of the loco 4 Function decoders also have a purple wire ...

Page 7: ...of the decoder Blue Common Wire This is the Common positive wire for all functions all other function wires are negative important to remember if you are installing LEDs Each function uses the Blue wire as the second part of its circuit Expert Tip If space is at a premium or if you want only half power to any light or accessory you can connect it to a white or yellow or green or purple wire withou...

Page 8: ...urple wire also known as Aux2 usually used for added lighting or DMU interior lights etc Default is for steady light non directional Operate with function 2 Can be re mapped to operate in other ways or with other buttons if you prefer Settings for the Purple Wire CV52 controls what the purple wire will do CV37 controls which function button can be used to activate the purple wire CV64 will allow y...

Page 9: ...ngly recommend you confirm how many functions your controller can operate and keep all functions allocated to buttons which allow one push access for easy operation We have color coded this chart to make it easier to understand Match the colored rows and columns to make the settings you need based on the chart information below The green table cells show which number should be entered into the rel...

Page 10: ...unning speed to a stop This adds realism and makes a train very much more interesting to drive We can vary it again later but for now let s be conservative set it to 15 as it can be unnerving if the train takes forever to stop CV5 This area controls the locomotives TOP volts Its total range is 0 255 and its default is zero in this case zero and 255 have the same meaning not limited As with CV2 eac...

Page 11: ...near power but the rate of acceleration would often be limited by heavy loading and the need to prevent wheel slip with their much larger diameter drivers Passenger speeds were good Braking was much slower mostly due to less sophisticated brake systems in the steam era Try CV3 20 CV4 24 CV5 188 CV6 60 CV61 1 B Ba ac ck k E EM MF F O Op pt ti io on ns s LaisDcc Back EMF self adjusts self compensate...

Page 12: ...our locomotives if you think about it In general this rule stipulates that light in the rear of a loco should be on dimmed when the front light is at full brightness importantly that the headlight should also always be dimmed in the direction of travel when 1 At stations yards where switching is underway 2 If a locomotive is stopped close behind another train 3 On non signaled lines when a locomot...

Page 13: ...ables in these instructions as much as I can but in this case there is no other way Note we may tweak or adjust these values from time to time so exact default numbers may vary slightly CV67 CV68 CV69 CV70 CV71 CV72 CV73 2 5 7 11 15 20 25 CV74 CV75 CV76 CV77 CV78 CV79 CV80 30 35 40 47 52 58 65 CV81 CV82 CV83 CV84 CV85 CV86 CV87 72 79 84 93 100 112 121 CV88 CV89 CV90 CV91 CV92 CV93 CV94 135 147 161...

Page 14: ...ant to do it within CV29 you can To turn off the decoder s ability to run on DC Just deduct 4 from the number already set in CV29 You may want to do this to solve mystery control problems or to activate Brake on DC abilities To force the decoder to use only 14 speed steps Just deduct 2 from the number already set in CV29 Now very rare this 14 speed step setting may be needed for seriously older DC...

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