Philips MFB 22RH541 repair.

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RWS
Berichten: 1
Lid geworden op: 21 sep 2022, 16:35

21 sep 2022, 16:51

Hi,

So here is the situation. I have two speakers Philips MFB 22RH541. They have had all the electrolytic capacitors replaced. Recently one of the speakers developed a fault. As soon as it is turned on it produces noise. The noise comes from both woofer and the tweeter.

Here is the video presenting the problem:



Before I start my repair could anyone with the experience possibly direct me on what this could be caused by?

As I mentioned the electrolytic capacitors are all brand new.

Thank you.
Robertvs
Donateur
Berichten: 2496
Lid geworden op: 30 dec 2012, 13:32
Locatie: regio ArnhemZ

21 sep 2022, 22:01

RWS schreef: 21 sep 2022, 16:51 and the tweeter.
that's strange, I would suspect the piezo transducer pcb in the bass-speaker, mainly the FET
541, 544, 585, (F9638 unrefurbished in dit theater)
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correltje
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Berichten: 4094
Lid geworden op: 24 aug 2010, 14:29
Locatie: Waalwijk

22 sep 2022, 17:29

Are all Japanese transistors replaced?

Gtrz,
Cor
MFB servicepunt in het zuiden van het land.
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Fotohuis
Berichten: 8509
Lid geworden op: 19 feb 2016, 17:37
Locatie: R'stein soms Mykolayiv (met een Leopard dan)
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25 sep 2022, 22:22

These…

7A094212-1152-4CA0-A020-9CD14C1FA4CC.jpeg
Philips 22RH550+Teufel Ultima-20mk2, 22RH426, 22AH489. 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: CDF-200, FA-911, FC-931.LS3/5a
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