Tag Archives: CDI550

Philips CD-i 550

CD-i, Disassembly, Modification, Philips, Repair

Philips CD-i Power Supply Units

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The aim of this article is to compile a comprehensive documentation of all known power supply units for Philips CD-i players. It is a work in progress and will be updated with new information at regular intervals. I welcome feedback, especially if you discover an error or can contribute additional information.

Frequently asked questions concern the operational safety of a model in different countries and the location of fuses. To answer these questions accurately, you need to know the specific built-in or external power supply associated with the model, version and revision of the player. The grouping by mainboard/hardware generation provides a clear overview, as already shown in the article Modifications for Philips CD-i players.

The documentation of the fuses in the Mono III and IV generations began years ago with the article Philips CD-i Mono III / IV Fuses, and it was always the plan to summarise it in a more comprehensive article covering all generations.

This article now follows that approach and presents specifications, information on fuses, compatibility and possible modifications. It summarises all relevant data from the previously mentioned articles.

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CD-i, Modification, Philips, Repair

NVRAM+RTC Solutions for Philips CD-i Players

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There are two main types of NVRAM+RTC solutions for Philips CD-i players to store user data and settings: 8 KB and 32 KB. They have a built-in battery that powers the non-volatile memory and the real-time clock. These two types are not compatible and thus cannot be replaced with each other (at least, not without hardware and/or ROM modifications).
There are other types, also 8 KB and 32 KB, but they concern only very few and rare devices. I point them out when necessary.

In this article, you’ll find information about the different NVRAM types and their alternatives. You’ll also find tips for repair and upgrades. If this looks familiar to you then you have probably read parts of it in my Modifications for Philips CD-i Players article before. Since the NVRAM section grew so large, I’ve completely rewritten it and will continue to update it in its own article.

Philips CD-i 8 and 32 KB NVRAM
Philips CD-i 8 and 32 KB NVRAM
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CD-i, Modification, Philips

Philips CDI450 32 KB NVRAM Upgrade

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In this article, I’ll upgrade a Philips CDI450 with 32 KB NVRAM. You’ll find all information that is needed to modify the system ROM and the mainboard. If this sounds familiar – yes, it does: In 2019, I explored the possibility to upgrade a CDI470. Even though patching the system ROM failed back then, the experiment was still a success. The final solution to access 32 KB NVRAM was to use the ROM of a 490. As it turned out later, this was also Philips’ solution for the 470/85 model, but that is a topic for another article.

With the 450 (and all other top-loading players with Roboco mainboard) it is a bit different: It’s a low-cost model with 8 KB NVRAM only. The mainboard was neither prepared for a bigger NVRAM solution nor is there a similar advanced model that I could borrow the system ROM from. This time, a ROM patch must succeed.

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CD-i, Disassembly, Philips, Repair

Philips CDM 12.1T Laser Sledge Replacement

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This guide shows the replacement of the laser sledge in Philips CDM 12.1T CD mechanisms. It assumes that you have already cleaned the lens and done the necessary troubleshooting to rule out other errors (see this article for diagnosis with the Service Shell). If you only get dirty disc messages or experience stuttering audio/video from time to time, you can still follow the guide to clean and grease the mechanism.

For documentation, I replaced the laser sledges of two CDI450 players with unreliable or no disc recognition at all. I took different approaches to find the easiest replacement procedure, so don’t be surprised if you suddenly see pictures where things are in different places.

Philips CDM 12.1T laser sledge replacement
Philips CDM 12.1T laser sledge replacement
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CD-i, Modification, Philips

Modifications for Philips CD-i Players

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This is an attempt to collect all known and available modifications for Philips CD-i players in a single article. Consider it a work in progress – I will add new information from time to time. Please give feedback if you find an error or want to add something to this article.

Due to the plethora of different models, versions and revisions of CD-i players that have been sold under the Philips / Magnavox or entirely different brands (OEM), it is virtually impossible to create one big list that contains every player. I chose a different approach with several lists to cover most of the hardware combinations: Available modifications, mainboards, and video encoders.

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CD-i, Disassembly, Modification, Philips, Repair

CD-i Earth Command Start Problems

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What if your favourite CD-i game refuses to start or shows some weird behaviour? Most likely, this is to blame on a defective Timekeeper and/or laser. This topic has been covered years ago. There is another problem with the game The 7th Guest, which is completely unrelated to the problems mentioned above though.

Earth Command isn’t my favourite game. It makes some fun for a while, to tamper with the various settings and eventually watch the world burn, but it never got me hooked for a long time.

Then the reports of some people caught my attention. Some had trouble starting the game, as the screen just turned black after the intro, while others had no problems with the game at all. There was no common denominator to pin down the problem, as all the CD-i players they’ve used were of different revisions and generations.

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