Philips CDI 220 Mini MMC 60Hz Modification and TimeKeeper Replacement

Recently I found a CDI 220/00 with Mini MMC mainboard. It’s a heavy and bulky unit that contains lot of PCBs, wires, screws and metal parts. It’s one of the first consumer CD-i players, later models have all components on one single mainboard (Mono).

CDI220/00 inside
CDI220/00 inside

Doing a 60 Hz modification is very easy, just move the solder blob from PAL to NTSC. Or install a switch at the NTSC, middle and PAL points.

Mini MMC PAL/NTSC
Mini MMC PAL/NTSC

However, replacing the TimeKeeper chip is rather complicated as you have to disassemble half of unit to reach the mainboard.
Note: All screws are Torqx T8.

First remove 5 screws with washers to open the top case, then the back bezel (3 screws) and DVC door.

CDI220/00 back
CDI220/00 back

CDI220/00 back

Slide out the DVC base und the two plastic guides at each side.

cdimini_05

A close-up view of the PCB that holds the DVC:

cdimini_06

At the back of this PCB is the working area, PAL/NTSC on the left and TimeKeeper chip on the right (and some dust). Don’t bother unscrewing the PCB, just unscrew the piece of metal (2 screws) and put the whole thing over to the CD side.

cdimini_07

Now it’s time to lift the mainboard (3 screws):

Mini MMC mainboard
Mini MMC mainboard
Mini MMC mainboard
Mini MMC mainboard

Remove the TimeKeeper chip from the marked area.

Mini MMC mainboard back
Mini MMC mainboard back

This is the mainboard back in place. The solder blob has been temporarily moved from PAL to NTSC to test the image stability and a socket with a new NVRAM chip (DS1643, more reliable) has been installed.

cdimini_11

There is a lot of space in the DVC cage, enough to install the 50/60 Hz switch. (Optionally you can hide the switch behind the front panel door)

cdimini_12

Then check if the switch works (never switch when the unit is turned on!) and if your NVRAM is still good. The put everything back in reverse order.

Switch hidden behind the DVC door:

cdimini_13

cdimini_14

Done!

We haven’t seen all PCBs yet:

CDI220/00 CD PCB
CDI220/00 CD PCB
CDI220/00 Video Encoder PCB (PAL)
CDI220/00 Video Encoder PCB (PAL)
CDI220/00 APU PCB (DAC SAA7321GP on the back side)
CDI220/00 APU PCB (DAC SAA7321GP on the back side)
CDI220/00 PSU
CDI220/00 PSU

3 thoughts on “Philips CDI 220 Mini MMC 60Hz Modification and TimeKeeper Replacement”

    1. It turns out that they DS-1643 is no longer manufactured. I will have to use the M48T08-150PCI chips.

    2. Yes, it worked. If you find new old stock of the DS1643 then pay attention to the date code on the package, it’ll tell you the year and calender week of production.

Leave a Reply

Your email address will not be published. Required fields are marked *