Category Archives: Repair

Repair

Philips CD-i RC6 Remote Control Hack

A quick and dirty hack to save a broken Philips CD-i RC6 remote control with a Sega Mega Drive controller.

Most CD-i players come with or are compatible with the 22ER9055 CD-i Commander, an RC6 remote control with a pressure-sensitive thumbpad. There are three known versions of the CD-i Commander:

  • RV 7701 – standard remote for most CD-i Players.
  • RV 7704 – with additional stand-by button for CDI660 and 670.
  • RV 7706 – with additional controls for CDI740.

When buying a used remote control, your first action should be to check the battery compartment for obvious leaking damage and also take it apart to find hidden damage. You never know if there were accidents in the past and previous owners just cleaned out the battery compartment without looking further into it.

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NVRAM+RTC Solutions for Philips CD-i Players

There are two 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).

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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Philips CD-i Mono III / IV Fuses

Replacing blown fuses in Philips CD-i players with Mono III and Mono IV mainboards – sounds too simple to write an article about. That’s why I’m going to dig a bit deeper into the topic. An important fuse sits on the mainboard and protects the -5 V rail. I tripped (over) it by accident and was confronted with these weird symptoms that are hard to diagnose:

  • No video output (well, there is something, but see below)
  • Service Shell video output with a rolling/flickering image
  • The disc tray opens on its own (tray loader motor is constantly spinning)
  • The spindle motor is constantly spinning
  • “cd” flashing on the VFD
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Philips CDM 12.1T Laser Sledge Replacement

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 sleds 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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Component Lists

This is an overview of the lists of capacitors and other components that I had to create in order to repair or modify my devices. Currently, all of them are already featured in my repair articles, but I will add further lists that are not featured yet or are a work in progress.

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Philips 22ER9021 CD-i Gamepad Repair

Recently, I acquired yet another CD-i player for repair and it came with a Philips 22ER9021 CD-i Gamepad. The gamepad showed two common signs of usage: Broken cable insulation and an unresponsive D-Pad.

The coating is broken right behind the cable strain relief. I’ve seen much worse cases of broken insulation and even ripped out conductors, but this still needs to be fixed before it becomes worse.

Philips 22ER9021 PCB - front - with broken cable insulation
Philips 22ER9021 PCB – front – with broken cable insulation
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Texas Instruments TI-82 Serial Link on Windows 10

In the early to mid-90s, the Texas Instruments Ti-82 Graphics Calculator (or Graphing Calculator) was introduced and became a requirement in some high schools. I never had the official serial link cable to connect mine to a PC, but it came with a calculator-to-calculator link cable. That cable was very popular during math lessons for trading pictures, programs and games. We had several games back then, but I only remember one game, a Breakout clone programmed in TI-BASIC that was painfully slow.

I still have this calculator, but it was sitting in a drawer for more than 20 years. In this article, I will bring it back to life and connect it to a modern Windows 10 PC to install a Breakout clone or something better on it.

Texas Instruments Ti-82 Graphics Calculator
Texas Instruments Ti-82 Graphics Calculator
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Hori Joystick-7 for Famicom Repair

This Hori Joystick-7 (HJ-7) for the Nintendo Famicom has been sitting on my shelf for many years. When I finally took it out to use it for the first time, I noticed that the stick got stuck when moving it all the way to the left or right. In this article, I will open it up and fix that issue.

Hori Joystick-7 (HJ-7) for Famicom
Hori Joystick-7 (HJ-7) for Famicom
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Cuckoo CRP-N0681F Battery Replacement

The Cuckoo CRP-N0681F rice cooker doesn’t run Doom (yet; see below), but it can talk, sing and chuff like a steam locomotive. It also prepares all kinds of rice. One day, the display went blank. The next time I plugged it back in, it greeted me in Korean and wanted me to set the clock. It seemed that the internal battery had died and the user manual agreed with that:

About Lithium battery
– This product contains lithium battery for improving blackout
compensation and time. Lithium battery lasts 3 years.
– When current time is not displayed on the screen, it means the battery is exhausted. It should be replaced.

Unfortunately, that’s all what the manual had to say about this topic. A quick search on the internet didn’t reveal any clues about the battery replacement, so I opened it up to have a look inside.

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