Comments on: Crystal And Tuning VR Found Defective In Philips Radio Model RL205/94

By: Parasuraman S

Parasuraman S — Sat, 21 Mar 2026 09:31:41 +0000

We need to maintain universal brotherhood, irrespective of where they are! We need to give only love, love and love to others and everything in this world! Many thanks for your wonderful comments! I loved it!

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By: jose ignacio

jose ignacio — Fri, 20 Mar 2026 17:33:33 +0000

I follow many of your repairs through this page, and it is a delight to see how you express your love for others through your mastery of electronics. Thank you for sharing it.

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By: Parasuraman S

Parasuraman S — Thu, 19 Mar 2026 13:20:18 +0000

In reply to MP.

Oh! I never thought that you were asking for the number of an IC which was already very clearly shown! Sorry!

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By: MP

MP — Wed, 18 Mar 2026 08:28:30 +0000

Sorry ! I had been having trouble to find out the IC number in the article, later I found its identity as, Si4825A10.

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By: Parasuraman S

Parasuraman S — Wed, 18 Mar 2026 04:52:21 +0000

In reply to Angel Delis.

Variable resistor. Many thanks!

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By: Parasuraman S

Parasuraman S — Wed, 18 Mar 2026 04:51:52 +0000

In reply to MP.

1) Value of Crystal: Looking at the circuit, we need to check what crystal is used and rpelace it. 2) How to test crystal: If you give the designated voltage to it as per its original datasheet, it will start resonating and we can check that in oscilloscope 3) Amplifier: You can use any stereo or mono amplifier IC suitable for its power supply, for which ready boards are now available in the market.

Hope this helps! Many thanks for your comments and queries!

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By: Angel Delis

Angel Delis — Tue, 17 Mar 2026 17:28:34 +0000

Hi, I love this web site because I learn a lot, but please what is a VR?

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By: MP

MP — Mon, 16 Mar 2026 09:00:03 +0000

Thanks for creating light in total darkness. But could you please shade a little bit more light on the function of the oscillator in relation to the SMD IC its linked to, and also memtion what should be done if a suspected crystal IC has nothing written on it as is often the case. also how to test it. PLEASE BEAR WITH MP, HE IS ASKING FOR TOO MUCH. Okey, please just one more querry. In small chinese origin radios I oftenly come across ic - KT9936M whose connections to the oscillator crystal, vcc, ground, VR middle pin etc, I'm conversant with. But the Philips radio and a few others have different amplifier SMD ICs (what was the ICs number please ?). I`m stuck with a radio whose shorted amplifier IC has no lable at all, its definitetly not kt9936m. It may be the IC I`ve been looking for. Philips, the name rings a bell in my mind, its too familiar, I mean just too familiar.

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By: Parasuraman S

Parasuraman S — Sun, 15 Mar 2026 00:40:14 +0000

In reply to Mark J.

Many thanks, dear Mark!

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By: Parasuraman S

Parasuraman S — Sun, 15 Mar 2026 00:39:24 +0000

In reply to Albert van Bemmelen.

Cleaning is a part and parcel of the repair work! Without that, I do not even feel like looking at the boards! It gives us the starting push and a clear mind to work on the problem solving! Many thanks, dear Albert!

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