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LGB 55028 Decoder Introduction and Programming:

The general rule of thumb, is to operate a new Loco or the Retrofit decoder with its default Address of 3 on a DCC system  first, and prior to making any attempt to program it.

Tested LGB 55028 decoder with Firmware version number 1.5 with the following equipment.

PIKO 35010 Central Station and a PIKO 35011 Navigator operating with Firmware version number 2.20p.

Note for the PIKO 35010 Central Station, placing it into pseudo programming mode was not necessary, able to program as normal. 

Massoth 1210Z Central Station operating with Firmware version number 2.65, and a Massoth 8134501 Navigator operating with Firmware version number 2.20d.

Note for the Massoth 1210Z Central Station, use programming track connection.

Massoth Service Tool version number 3.5.1.109, Massoth 8176001 Service Board, Massoth PC Module 8175101 with operating Firmware version 4.0.

Note for Massoth Service Tool, have created a number of Test decoder templates for the LGB 55028 decoder to verify correct operation when programmed.


LGB 55028 Decoder

LGB 55028 Decoder top and bottom view.

LGB 55028  pin configurations with the LGB 55529 Interface Board.

LGB 55529 Interface Board with 10 pin connector.

Navigator  Prog Menu Firmware version 2.20p, dated 9th June 2021.

Refer to the Massoth DiMAX Navigator manual dated  2019.05 Version 2.10, Page 24, 6. Programming for further details.

The observant may well spot that the picture above is a little different from the manual, a few minor cosmetic changes are evident to the screen layouts of Firmware versions 2.20x, they have no effect on correct operation.

From the Programming Menu as per the picture above, no issues to report.

Long Addressing works as it should, combination of CV 1, CV 17, CV 18 and CV 29, the correct values are present.

CV 17 and CV 18 automatically adjust, like wise CV 29 changes value by adding 32 to the previous value.

CV 50, valid values and parameters.


Massoth Service Tool Decoder Template for the LGB 55028 Retrofit Decoder mSD-mLD.

Values displayed are for a Retrofit Decoder.

Reset to  factory defaults with CV 8 = 8.

 Provided  as a reference guide, the complete CV Listing of all 260 CV's used on the Retrofit decoder.

Values displayed may be different for Factory Installed LGB models, which are configured to specific requirements dependent on the model number.  


LGB 55028 LED Lighting Effects.


Only valid for CV's 115,118,121, 124 and 127.