Philips Cdm4 19 Service 22: A Guide to Repair and Maintain Your CD Player

If you own a Philips CD player that uses the CDM4/19 mechanism, you might be wondering what is Philips Cdm4 19 Service 22 and how to perform it. In this article, we will explain what this service means, why it is important, and how to do it yourself or with the help of a professional.

Philips Cdm4 19 Service 22 is a code that indicates the need for laser current adjustment. The laser current is the amount of electric current that flows through the laser diode, which is the component that reads the data from the CD. The laser current affects the quality and accuracy of the signal that the laser diode produces.

Over time, the laser diode can degrade or wear out due to various factors, such as dust, humidity, temperature changes, or simply aging. This can cause the laser current to change and become too high or too low. If the laser current is too high, it can damage the laser diode or the CD. If the laser current is too low, it can cause skipping, distortion, or no sound at all.

Therefore, it is important to check and adjust the laser current periodically to ensure optimal performance and longevity of your CD player. Philips recommends doing this service every two years or after every 1000 hours of use.

How to Perform Philips Cdm4 19 Service 22

There are two ways to perform Philips Cdm4 19 Service 22: by yourself or by a professional. If you are confident and experienced in electronics and soldering, you can try to do it yourself by following these steps:

1. Unplug your CD player from the power source and remove any CD inside.
2. Open the CD player case by unscrewing the screws on the back and sides.
3. Locate the CDM4/19 mechanism and identify its components. You will need to find the potentiometer R3520, which is used to adjust the laser current, and the resistor R3501, which is used to measure the voltage across it. You will also need to find a test point TP1, which is connected to pin 22 of IC3501 (the servo IC).
4. Connect a digital multimeter (DMM) to TP1 and ground (GND) and set it to measure DC voltage.
5. Connect a CD player tester (CDT) or a similar device that can generate a test signal for CD players to pin 11 of IC3501 (the RF output) and set it to measure RF level.
6. Turn on your CD player and insert a test disc (such as Philips SBC444A) into the mechanism.
7. Play track 1 of the test disc and observe the readings on your DMM and CDT. The DMM should read around 50 mV and the CDT should read around 1.2 Vpp.
8. If the readings are not within these ranges, you need to adjust the potentiometer R3520 until they are. Turn it clockwise to increase the laser current and voltage, or counterclockwise to decrease them.
9. After adjusting the potentiometer R3520, check if your CD player plays normally without skipping or distortion. If not, you may need to replace the laser diode or other components.
10. Turn off your CD player and disconnect your DMM and CDT.
11. Reassemble your CD player case and screw it back together.

Congratulations! You have successfully performed Philips Cdm4 19 Service 22 by yourself.

If you are not confident or experienced in electronics and soldering, you should seek professional help from a qualified technician or service center. They will have the proper tools and skills to perform Philips Cdm4 19 Service 22 safely and correctly.

What Are the Benefits of Philips Cdm4 19 Service 22

Performing Philips Cdm4 19 Service 22 has many benefits for your CD player and your listening experience. Some of them are:

• It improves the sound quality and accuracy of your CD player by ensuring optimal signal output from the laser diode.
• It extends the lifespan of your CD player by preventing damage or wear to the laser diode or other components.
• It saves you money and time by avoiding costly repairs or replacements in the future.
• It enhances your enjoyment and satisfaction of listening to your favorite CDs.

These are some of the benefits of performing Philips Cdm4 19 Service 22 for your CD player.

How to Find Philips Cdm4 19 Service 22 Manuals and Schematics

If you want to perform Philips Cdm4 19 Service 22 by yourself, you will need to have the service manuals and schematics for your CD player and the CDM4/19 mechanism. These documents will provide you with the detailed instructions, diagrams, specifications, and parts lists that you will need to do the service correctly.

However, finding these documents can be challenging, as they are not widely available online or in print. You may have to search for them on various websites, forums, or databases that offer free or paid downloads of service manuals and schematics. Some of these sources are:

• eserviceinfo.com: This is a website that offers free downloads of service manuals and schematics for various electronic devices, including CD players and mechanisms. You can search for your model number or keyword and download the files in PDF format.
• diyaudio.com: This is a forum that discusses various topics related to audio equipment and DIY projects. You can find threads that talk about Philips Cdm4 19 Service 22 and other CD player issues. You can also ask for help or advice from other members who may have the service manuals or schematics that you need.
• audiokarma.org: This is another forum that focuses on audio equipment and vintage gear. You can find threads that share information and experiences about Philips Cdm4 19 Service 22 and other CD player repairs. You can also request for service manuals or schematics from other members who may have them.
• hifi-advice.com: This is a website that reviews and compares various audio products and components. You can find articles that talk about Philips CDM mechanisms and their history, features, and performance. You can also find links to other websites that may have the service manuals or schematics that you need.
• sway.office.com: This is a website that allows you to create and share interactive presentations and reports. You can find a presentation that shows Philips Cdm4 19 Service 22 and explains what it is, how to do it, and what are the benefits. You can also download the presentation as a PDF file.

These are some of the sources where you can find Philips Cdm4 19 Service 22 manuals and schematics. However, you should be careful when downloading files from unknown or untrusted sources, as they may contain viruses or malware that can harm your computer or device. You should also check the accuracy and completeness of the documents before using them, as they may contain errors or omissions that can affect your service results.

Where to Buy Philips Cdm4 19 Service 22 Parts and Accessories

If you need to buy Philips Cdm4 19 Service 22 parts and accessories, such as the laser diode, the potentiometer, the resistor, the test disc, the CD player tester, or the digital multimeter, you have several options to choose from. Some of them are:

• Philips: You can contact Philips directly and ask for the availability and price of the parts and accessories that you need. You can also check their website for online ordering or authorized dealers near you.
• eBay: You can search for Philips Cdm4 19 Service 22 parts and accessories on eBay, which is a popular online marketplace that connects buyers and sellers of various products. You can find new or used items at different prices and conditions. However, you should be careful when buying from unknown or untrusted sellers, as they may not deliver the items as described or at all.
• Amazon: You can also search for Philips Cdm4 19 Service 22 parts and accessories on Amazon, which is another popular online marketplace that offers a wide range of products. You can find new or used items at different prices and conditions. You can also benefit from the customer reviews and ratings, the fast shipping, and the customer service that Amazon provides.
• Other online stores: You can also look for Philips Cdm4 19 Service 22 parts and accessories on other online stores that specialize in audio equipment or electronic components. You can compare prices and features and choose the best option for your needs.
• Local stores: You can also visit your local stores that sell audio equipment or electronic components and ask for Philips Cdm4 19 Service 22 parts and accessories. You can see and test the items before buying them and get advice from the staff.

These are some of the options where you can buy Philips Cdm4 19 Service 22 parts and accessories. However, you should always check the compatibility and quality of the items before buying them, as they may not work properly or cause damage to your CD player.

What Are the Differences Between Philips Cdm4 19 and Other CDM Mechanisms

Philips CDM mechanisms are the series of compact disc mechanisms that Philips developed and manufactured since the introduction of the first CD player in 1982. Philips CDM mechanisms are known for their high quality, reliability, and performance. They have been used by many audio brands and models over the years.

Philips Cdm4 19 is one of the most popular and widely used CDM mechanisms. It was introduced in 1987 and replaced the previous CDM2 and CDM3 mechanisms. It has a single-beam laser pickup with a swing arm design and a composite resin top plate. It is compatible with most CD formats and has a low error rate.

However, Philips Cdm4 19 is not the only CDM mechanism that Philips produced. There are many other CDM mechanisms that have different features, specifications, and applications. Some of them are:

• CDM1: This is the first CDM mechanism that Philips developed and used in the first CD player, the Philips CD100, in 1982. It has a three-beam laser pickup with a linear motor design and a cast metal top plate. It is very robust and accurate, but also very expensive and complex.
• CDM1 MkII: This is an improved version of the CDM1 that was introduced in 1985. It has a two-beam laser pickup with a linear motor design and a cast metal top plate. It is more reliable and cheaper than the CDM1, but still very high-end and rare.
• CDM9: This is another high-end CDM mechanism that Philips developed and used in some of their top models, such as the Philips LHH1000, in 1991. It has a single-beam laser pickup with a swing arm design and a cast metal top plate. It is very precise and stable, but also very expensive and sensitive.
• CDM12: This is a low-cost CDM mechanism that Philips developed and used in some of their budget models, such as the Philips CD610, in 1993. It has a single-beam laser pickup with a radial motor design and a plastic top plate. It is very cheap and simple, but also very prone to errors and failures.

These are some of the differences between Philips Cdm4 19 and other CDM mechanisms. Each CDM mechanism has its own advantages and disadvantages, depending on the design, quality, and application.

Conclusion

Philips Cdm4 19 Service 22 is a code that indicates the need for laser current adjustment for the Philips CDM4/19 mechanism, which is a popular and widely used CD mechanism. Laser current adjustment is important to ensure optimal performance and longevity of your CD player and to avoid skipping, distortion, or damage. Philips Cdm4 19 Service 22 can be performed by yourself or by a professional, depending on your skills and confidence. You will need to have the service manuals and schematics for your CD player and the CDM4/19 mechanism, as well as the necessary parts and accessories. You can find these documents and items from various sources online or offline. Philips Cdm4 19 Service 22 has many benefits for your CD player and your listening experience, such as improving sound quality, extending lifespan, saving money and time, and enhancing enjoyment and satisfaction.

If you are interested in Philips Cdm4 19 Service 22 or other Philips CDM mechanisms, you should definitely read this article. It will provide you with a comprehensive and informative guide on what Philips Cdm4 19 Service 22 is, how to do it, why it is important, where to find the manuals and parts, and what are the differences between Philips Cdm4 19 and other CDM mechanisms. It will also give you some tips and tricks for improving and maintaining your CD player.

We hope you enjoyed this article and learned something new. Thank you for reading!

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