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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment.

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Old 21st Jun 2024, 8:33 pm   #1
hugomoreira
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Arrow Disc problem Fidelity system 4-40.

Hello there,
I just got a Fidelity system 4-40. The entire cassette and radio playback part works perfectly. However, the vinyl drive disc seems to have seized up and the motor is therefore unable to drive the disc and is blocked by its resistance. Does anyone know how to disassemble this part in order to lubricate everything or have the user manual to solve the problems? Thank you for your time and your potential answers.
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Old 21st Jun 2024, 10:36 pm   #2
jamesperrett
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Default Re: Disc problem Fidelity system 4-40.

This sticky thread at the top of this section is essential reading

https://www.vintage-radio.net/forum/...ad.php?t=75401

The third post explains the cause of the problem and how to fix it.
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Old 22nd Jun 2024, 2:10 pm   #3
hugomoreira
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Default Re: Disc problem Fidelity system 4-40.

First of all, thank you for your response and this thread which is very informative. But after a fascinating reading, I cannot remove the turntable to access the mechanism. I don't know if I missed something or if I'm not good at it. Does anyone have a solution to this problem?
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Old 22nd Jun 2024, 6:59 pm   #4
Edward Huggins
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Default Re: Disc problem Fidelity system 4-40.

Have you removed the circlip?
I can clearly it see over the stub spindle.
Prise it off (make sure it does not fly off into infinity) and gentle lift/ease the platter off.
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Old 22nd Jun 2024, 9:16 pm   #5
nigelr2000
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Default Re: Disc problem Fidelity system 4-40.

You will probably have to apply some heat to the centre spindle area to get it off, make sure you don't rotate it too far as the centre will come adift as it's only riveted in place.
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Old 23rd Jun 2024, 11:18 pm   #6
ben
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Default Re: Disc problem Fidelity system 4-40.

Place the tip of a soldering iron on the centre shaft for a minute or two, then gently try turning the platter side to side. The sticky grease will loosen.

It looks like the platter may already have been forced, as the small notch in the shaft should face the arm pivot. This will need resetting or the automatic functions will not work properly.
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