Philips FC 931 Cassette deck

De compact cassette was een schitterende uitvinding van Philips en werd een wereldwijd succes. Ook bandrecorders blijken een tijdloos populair medium.Kun jij ook geen genoeg krijgen van die sfeervol draaiende spoelen? Deel hier je magnetische passie!

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Rover75CDT
Berichten: 8
Lid geworden op: 01 mar 2024, 13:47

Hello, I am new to this lovely site and also to the Philips brand of cassette decks. I hope I am posting in the correct place for some help.
I have a Philips FC 931 dual well cassette deck which is in very good working order except that both the mechanisms suffer from the very same problem, that is when they are playing a tape there is a pulsating and vibrating noise from the mechanisms, specifically from the flywheels. I have cleaned the gears and plastic parts, changed the belts and oiled the capstans. The noise/vibration is worse when playing forward rather than backward. The sound is not affected as such, the capstan motor speed is acceptable and wow and flutter also withing specification.
Does anyone have any suggestions how I might be able to quieten the mechanisms down.

The second problem I have is that the 3 LEDs on the keyboard do not appear to light up, any ideas?.
Thank you.
Rover75CDT
Berichten: 8
Lid geworden op: 01 mar 2024, 13:47

I am rather disappointed at the lack of any kind of response from the forum, I suppose the '931' is not a well known model.
Forumnaam
Donateur
Berichten: 1090
Lid geworden op: 21 aug 2021, 10:12

A little bit patient is a good mather. :whistle:
Its weekend, and this a hobby forum
If you want it fast and now, go see a repair man on instant. :roll:
Also this is a dutch forum, no problems with other languages but not every one is reading or answering in english a every day job ... so a answer might take a longer time, To be sour because you have to wait for some time is not neccasery :?
snameroc
Donateur
Berichten: 9250
Lid geworden op: 01 mei 2010, 13:45

Can you make a movie of the problems?
You can load it up to youtube and place a link here.
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Fotohuis
Berichten: 9508
Lid geworden op: 19 feb 2016, 17:37
Locatie: R'stein soms Mykolayiv (met een Leopard dan)
Contacteer:

Well I have a 900 system and one of them is the FC-931 cassette deck. However apart from removing the cover to look at some dust and the condition of the belts, I never had any problems with it. It is in specs my best cassette deck: Metal, Dolby B/C, HX-Pro, auto bias, auto reverse.
So indeed upload a video from it and give a link to this "hobby forum".
Philips 22RH550+Teufel Ultima-20mk2, 22RH426, 22AH489. N4510, N4511, N4450, N2521, N2520, 22GA(1)408, 212, 312, 222 +GP401/412mk2 Shibata/MC-3 Turbo/AT-OC9XEN.CD204.NAD C352, C422, C521BEE+FB820. 22RH743+22RH544/79R.900:CDF200, FA911, FC931, FT930.LS3/5A.
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Fotohuis
Berichten: 9508
Lid geworden op: 19 feb 2016, 17:37
Locatie: R'stein soms Mykolayiv (met een Leopard dan)
Contacteer:

I am rather disappointed at the lack of any kind of response from the forum
Talking about any quick response ... :mrgreen:
Philips 22RH550+Teufel Ultima-20mk2, 22RH426, 22AH489. N4510, N4511, N4450, N2521, N2520, 22GA(1)408, 212, 312, 222 +GP401/412mk2 Shibata/MC-3 Turbo/AT-OC9XEN.CD204.NAD C352, C422, C521BEE+FB820. 22RH743+22RH544/79R.900:CDF200, FA911, FC931, FT930.LS3/5A.
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Thomas
Site Admin
Berichten: 12652
Lid geworden op: 16 jun 2005, 15:55
Locatie: Lochem, Gelderland
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I am so disappointed by new members having high expectations and little patience…
Thomas Baur
20 jaar MFBfreaks: 2003 - 2023

Home: http://www.mfbfreaks.com
Shop: http://shop.mfbfreaks.com

4-4-2024: Over de Philips Big Sound Drive In Show!
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Jarek20
Berichten: 8
Lid geworden op: 23 okt 2019, 22:05
Locatie: Poland - Krakow

Hoi.

De eerste en fundamentele vraag is of de mechanismen origineel zijn of dat de tandwielen misschien zijn veranderd in een versie gemaakt van hars of 3D-printen?
Bij de CRD 467- en CRD 468-mechanismen zijn er problemen met de tandwielen tussen de platen (rollen).
Het is bekend dat als ze niet origineel zijn, er een mogelijkheid is van een luidere werking en verschillende problemen met de mechanica.

Groeten, Jarek
Philips Series 900: R900, 2xDSC950, DSS930, 2xFA950, FA951, 2xFA930, 2xFV930, 2xCD950, CD931, CD930, CDC925, 2xDCC900, 2xDCC951, 2xFC950, FC940, FC931, 2xFT950, FT930, FR931, FP930, B&W DM602 S1 :D
Rover75CDT
Berichten: 8
Lid geworden op: 01 mar 2024, 13:47

Thank you for the replies and apologies for my impatient nature.
I have solved the LED problem, it was due to an incorrectly seated cable.
The noise problem is due to worn gearing on the capstan gears and although this is so it does not appear to affect the overall quality of the playback, recording is acceptable.
Thank you again.
Rover75CDT
Berichten: 8
Lid geworden op: 01 mar 2024, 13:47


Hey guys this is the link to my noisy mechanisms.
snameroc
Donateur
Berichten: 9250
Lid geworden op: 01 mei 2010, 13:45

Are there the original gears inside it or are it new one?
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Fotohuis
Berichten: 9508
Lid geworden op: 19 feb 2016, 17:37
Locatie: R'stein soms Mykolayiv (met een Leopard dan)
Contacteer:

In the FC-931 are no polyurethane breaking gears. I mean the flexible ones who are getting brittle.
Philips 22RH550+Teufel Ultima-20mk2, 22RH426, 22AH489. N4510, N4511, N4450, N2521, N2520, 22GA(1)408, 212, 312, 222 +GP401/412mk2 Shibata/MC-3 Turbo/AT-OC9XEN.CD204.NAD C352, C422, C521BEE+FB820. 22RH743+22RH544/79R.900:CDF200, FA911, FC931, FT930.LS3/5A.
Rover75CDT
Berichten: 8
Lid geworden op: 01 mar 2024, 13:47

https://photos.app.goo.gl/dqaNiGEKrKV9CXnh6
This is a photo of the gear mechanism in deck 2. Can you spot anything unusual, note the flywheels are removed for clarity.
snameroc
Donateur
Berichten: 9250
Lid geworden op: 01 mei 2010, 13:45

I don’t see anything strange but i am shure you hear the gears in your movie. Are the 2 gears with the gap in it standing stil when normal playing a tape? They only should move while you touch some transport button a short time
Rover75CDT
Berichten: 8
Lid geworden op: 01 mar 2024, 13:47

The gears with the gap cut in them are not used during normal playback, they are timing gears and are used to change the direction of rotation when playing a tape forward (front) or backward (back). Note their teeth are clean unlike the smaller gears that engage the capstan gears on the flywheels which have blackened teeth, even after cleaning.
I can hear the noise when playing a tape in the forward direction in both wells!.
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