FM discriminator for B5X43A (Techniek Radio/TV)

door Johnny Coleman @, 09.12.2023, 18:18 (142 dagen geleden)

Can anyone recommend a repair facility for the FM discriminator in my Phillips B5X43A /74 radio? There is good input but no output on either Right or Left channel.

Thanks,

Johnny

FM discriminator for B5X43A

door Hersteller @, 09.12.2023, 22:39 (141 dagen geleden) @ Johnny Coleman

Always bad elco´s

FM discriminator for B5X43A

door hans @, Hoorn, 09.12.2023, 23:51 (141 dagen geleden) @ Hersteller

Always bad elco´s

i.e. electrolytics or electrolytic capacitors

hans

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FM discriminator for B5X43A

door Johnny Coleman @, 09.12.2023, 23:59 (141 dagen geleden) @ hans

Thank you. I'll check them.

Johnny

FM discriminator for B5X43A

door Hersteller @, 10.12.2023, 00:16 (141 dagen geleden) @ hans

Dank je Hans voor het vertalen, besef me nu pas dat elco typisch Nederlands is.

FM discriminator for B5X43A

door hans @, Hoorn, 10.12.2023, 17:45 (141 dagen geleden) @ Hersteller

my pleasure :-)

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FM discriminator for B5X43A

door Johnny Coleman @, 09.12.2023, 23:59 (141 dagen geleden) @ Hersteller

Thank you. I will start checking them.

Johnny

FM discriminator for B5X43A

door rene @, Castricum, 10.12.2023, 16:57 (141 dagen geleden) @ Johnny Coleman

[image]

FM discriminator for B5X43A

door Johnny Coleman @, 11.12.2023, 16:44 (140 dagen geleden) @ rene

Thank you.

I will look over this circuit.

Johnny

FM discriminator for B5X43A

door Hersteller @, 11.12.2023, 23:43 (139 dagen geleden) @ Johnny Coleman

You are talking about L and R channel, do you mean the stereo demodulator? Same problem!

FM discriminator for B5X43A

door Johnny Coleman @, 16.12.2023, 22:18 (134 dagen geleden) @ Hersteller

Yes, I am just a novice. I used the wrong word in my original post.

I think I have found the problem though. One of the transistors in my FM stereo demodulator is shorted between the Emitter and the Base.

Thanks,

Johnny

FM discriminator for B5X43A

door ruudtx @, 17.12.2023, 18:26 (134 dagen geleden) @ Johnny Coleman

Actually the correct word for the device that seems to be the problem is Stereo Decoder.

FM discriminator for B5X43A

door Johnny Coleman @, 17.12.2023, 23:49 (133 dagen geleden) @ ruudtx

Stereo decoder.

Wish me luck.

Thank you.

Johnny

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