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DCC Decoder Installation Instructions for the N-Scale Motorized Track Cleaning Car 

1. Remove carefully the decoder from the packaging.
2. Add a piece of foam double-sided tape to the back of the decoder. (On the big part of the decoder) See Picture #1
3. Remove the Box shell for your Track cleaning car.
4. Carefully remove the two pins that hold the trucks on the frame.
5. Carefully unsolder the wires to the motor and trucks. (6 places) See Pictures #2 and #3
6. Remove the backing on the foam double-sided tape and place it on the weight as shown.  
7. Pre-bend the wires so that the ends line up with the contacts on each truck. See Picture #4
8. Carefully solder the Red & Black wires to each truck. Note Red on one side the Black on the other side.
9. Re-install the pins into each truck. (Hold the backside, the pins fit tightly upon pressing)
10. Carefully solder the Orange and Grey wire onto the top, to each of the motor leads. (Do not over heat the motor Leads!)
11. Make sure the wires are positioned so that the trucks move freely and the frame can be easily installed over the wires. See Picture #5
12. Re-install the box, carefully note ALL the wires, and DO NOT pinch them between the frame & box.
13. Note: Default Decoder setting is No.3
14. SEE ALL PICTURES Below.

THANKS for purchasing our custom DCC Decoder for you NEW N-Scale Motorized Track Cleaning Car!

For Questions & Technical Help Please Call or write to: MNP Inc.

Pictures for N-Scale DCC Motorized Track Cleaning Car

#1, (Foam Tape) Note Position & Size                           #2, Un-solder motor leads        

          #3, Un-solder Truck leads                                #4 Bend Wire leads for motor & trucks        

                                       #5 Final Installation of the Decoder  

TECHNICAL INFO BELOW:

Fine tuning for N-Scale Track Cleaning Car operation :

The factory settings normally provide good performance  for most locomotives in HO-Scale.  You may want to improve or fine tune performance by adjust the starting characteristics or top speed .    

There are 2 CVs that define:

Ù        The maximum motor speed

Ù        The mid speed range response characteristics or ‘speed curve’.

 Vmax - CV5: If your locomotive runs too fast you can use CV5 to lower its maximum speed.   Setting CV5 to 255 uses the maximum possible voltage to run the motor when full speed is requested.  Set CV5 to a smaller value to reduce the top speed.   A value of 128 will yield approximately ½ full voltage to the motor at top speed.  192 will provide about ¾ full voltage.   All speeds from the middle speed step to the maximum will be proportionally reduced (see diagram).  If CV5 is set to 0 the decoder will use 255 for maximum speed.  Always make sure CV5 is greater than CV6 to avoid erratic operation.

Vmid - CV6: CV6 determines how the motor responds through its middle speed ranges to advancement of the throttle.   If you set CV6 lower than half the maximum speed you’ll have smaller increases in motor speed through the lower speed ranges.  Then, as you hit the upper speed ranges there will be larger increases between speed steps.   In the diagram below you can see this best illustrated by the factory default line.   If you set Vstart larger than 0 you’ll will most likely want to raise Vmid so a reasonable slope is maintained in the ‘speed curve’.  If CV6 is set to 0 the decoder will use 127 as the value.   If you use high values in CV57 you will want to increase CV6 by a proportional amount to keep a smooth acceleration curve.

Reverse trim (also forward trim) - CV95:

Values from 1-127 make decoder run faster in reverse than forward.  1 is one speed step faster in reverse, 2 is two steps faster, etc.

Values from 129-255 make decoder run faster in forward than reverse. 129 is one speed step faster in forward, 130 is 2 speed steps faster, etc.  0 and 128 add nothing to either direction.  

Factory default values for decoder Configuration Variables (CVs)

 Configuration Variables used by V3.5 Decoders

CV1        Short decoder address;  1-127 valid

CV2        Start Voltage (useful range 0-100)

CV3        Acceleration rate (each unit  =  7mS between speed steps)  255 max. 

CV4        Deceleration rate (each unit =  7mS between speed steps)  255 max.

CV5        Vmax, speed at highest speed step.  0=use factory default of 255

CV6        Vmid, speed (on a scale of 1-255) at speed step 7,14,or 63.  0=use default of 127

CV7        Decoder version number.  This decoder is 35 which means version 3.5

CV8        Manufactuer ID. = 11 (0B hex)

CV17      High byte of long (4 digit) address

- bit 6,7 always= 1  

- bits 0-5  are upper 6 bits of address

CV18      Low byte of long (4 digit) address

CV19      Consist address. (0 or 128 = no consist active) 

             - bits 0-6    short consist address (1-127 valid)

             - bit 7           0= direction is normal, 1= direction is reversed

CV29      - bit 0      1= direction of operation is reversed, 0= direction is normal

             - bit 1      1=28 speed mode (always enabled)

             - bit 2      1= analog operation mode enabled, 0 = disabled

             - bit 4      1= alternate speed table active, 0= use table defined by CV2,5,6

             - bit 5      1= use long address in CV17/18,  0= use short address CV1

             - bits 3,6,7 are ignored by the decoder

CV30      Set this CV to 2 on the programming track and the decoder will reset to factory settings.

CV67-CV94 Uploadable speed table steps 1-28 (128 speed mode calculates intermediate steps)

CV NOTES: All CV numbers not listed above are ignored.  This decoder supports all DCC programming methods. 

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Last modified: March 21, 2013