Nikkodo / BMB CD-I Auto Master Controller CDI-M1500 (L)

Nikkodo / BMB CD-I Auto Master Controller CDI-M1500 (L)

Master controller for Nikkodo / BMB CD-i karaoke systems. It is similar to the Philips CDI 181 MultiMedia Controller (JNMS). The mainboards of these units were made by Kyocera. They all lack optical disc drives and require additional units (e.g. CDI 180 for JNMS and CDI-A1500 for BMB).

So far, four different hardware generations have been found, and there may be more. The hardware has evolved from being very similar to JNMS to something that hasn’t been seen in other CD-i players. To identify different CDI-M1500 mainboards/generations, I use the first character of the serial number:

Resources

Player shell

System ROM

The system ROM is stored in two TI TMS27C020-12 262144 by 8-bit EPROMs (U26 ODD and U27 EVEN).

BMB CDI-M1500 (L) - System ROM

Modules and checksums:

Two images (stx.dyuv and rie_surf.dyuv) found in the system ROM, possibly for calibration purposes.

PCBs and markings

The inspection of the PCBs has not yet begun.

BMB CD-I Auto Master Controller CDI-M1500 (L)
BMB CD-I Auto Master Controller CDI-M1500 (L)

PDCDG4002B (mainboard, front)

BMB CD-I Auto Master Controller CDI-M1500 (L)

Back connectors

BMB CDI-M1500 (L) - back panel

PSU Nichicon CI-1PS

The first visual inspection gives hope that this power supply unit is in better condition than the others.

CI-1PS
(ZSKY114G)
Ser. No. 013428.
INPUT:AC100-120V
50-60Hz
nichicon D JAPAN

To-do

  • Complete inspection of all PCBs and creation of chip marking lists.
  • Inspection of the power supply unit and identification of all components, including those that can no longer be identified on the other PSUs
  • Replacement of all electrolytic capacitors in the PSU.
  • New power cable.

Credits

Many thanks to
Zero for letting me have this unit
ogarvey for converting stx.dyuv and rie_surf.dyuv
– CD-i Fan for analysing the system ROM

History

2025-02-28: Initial WIP Page published
2025-06-14: Player shell photos and system ROM information added

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