Philips / Radiola 544 (FR)

Alles over onze geliefde MFB boxen in deze categorie.

Moderator: Moderators

Plaats reactie
stephane495
Berichten: 5
Lid geworden op: 06 apr 2021, 22:06
Locatie: France

06 apr 2021, 22:31

Hello ! I'm new to this forum and I'm looking for advice for the restoration of the MFB 544 (with the brand Radiola and not Philips because they were bought in France).
I get those speakers from my father and there is an audible hum when there is no audio signal.
I would like to start the replacement of all chemical capacitors. I make a list of capacitors and their potential replacement from Mouser.
Could you give me some advice on this list ?
stephane495
Berichten: 5
Lid geworden op: 06 apr 2021, 22:06
Locatie: France

06 apr 2021, 23:00

  • Board | Ref schematics | Old characteristics | New characteristics | Ref mouser.fr | Number
  • Main | C542, C539, C537 | 10uF/25v | 10uF/63v - Vishay | 594-2222-021-28109 | 3
  • Main | C551, C586 | 10uf/63v | 10uF/63v - Vishay | 594-2222-021-28109 | 2
  • Main | C550, C526 | 15uF/40v | 15uF/63v - Vishay | 594-2222-021-38159 | 2
  • Main | C508 | 220uF/16v | 220uF/25v - Vishay | 594-2222-021-26221 | 1
  • Main | C587 | 22uF/63v | 22uF/63v - Vishay | 594-2222-021-28229 | 1
  • Main | C525 | 33uF/16v | 33uF/63v - Vishay | 594-2222-021-38339 | 1
  • Main | C554, C516 | 4,7uF/63v | 4,7uF/63v - Vishay | 594-2222-021-28478 | 2
  • Main | C560 | 470uF/25v | 470uF/40v - Vishay | 594-2222-120-17471 | 1
  • Main | C544 | 470uf/6,3v | 470uF/6,3v - Vishay | 594-2222-021-33471 | 1
  • Main | C523 | 47uF/40v | 47uF/40v - Vishay | 594-2222-118-37479 | 1
  • Main | C518 | 47uF/4v | 47uF/25v - Vishay | 594-2222-021-36479 | 1
  • Main | C524 | 47uF/10v | 47uF/25v - Vishay | 594-2222-021-36479 | 1
  • Main | C567 | 6,8uF/100v | 6,8uF/250v - Wima MKP | 505-MKP4F046806G00KS | 1
  • Main | C528 | 680uF/40v | 680uF/63v - Vishay | 594-2222-021-18681 | 1
  • Body | C588 | 2x2350uF/63V | 6800uF/63v - Vishay | 594-MAL205858682E3 | 1
  • Body | C535 | 4700uF/40V | 4700uF/63v - Vishay | 594-MAL205858472E3 | 1
  • Body | C565 | 680uF/63V | 680uF/100v - Nichicon KG | 647-LKG2A681MESZAK | 1
  • Other | ? | 15uF/16v | 15uF/63v - Vishay | 594-2222-021-38159 | 1
  • Other | ? | 330uF/10v | 330uf/40v - Vishay | 594-2222-021-37331 | 1
  • Other | ? | 4,7uF/63v | 4,7uF/63v - Vishay | 594-2222-021-28478 | 2
I watched the restoration video on Youtube that advice to use axial Vishay as best replacement.
stephane495
Berichten: 5
Lid geworden op: 06 apr 2021, 22:06
Locatie: France

06 apr 2021, 23:19

Some pictures of my speakers
Laatst gewijzigd door stephane495 op 10 apr 2021, 23:35, 1 keer totaal gewijzigd.
mae
Donateur
Berichten: 5586
Lid geworden op: 17 nov 2013, 02:42
Locatie: Randstad

06 apr 2021, 23:51

If you use 63V versions for the two mains smoothing electrolytics, make very sure to select 240V mains voltage on the transformer. Better yet, use 80V versions.
stephane495
Berichten: 5
Lid geworden op: 06 apr 2021, 22:06
Locatie: France

07 apr 2021, 00:34

I set the speakers on 240v. For C588 and C535, I will choose the 80v version.
Gebruikersavatar
Thomas
Site Admin
Berichten: 11958
Lid geworden op: 16 jun 2005, 15:55
Locatie: Lochem, Gelderland
Contacteer:

10 apr 2021, 22:49

You could order the 22RH544 capacitor kit from the mfbfreaks shop, that saves you a lot of time ordering separate parts :)
Thomas Baur
webmaster http://www.mfbfreaks.com
De Enige Echte Philips Motional Feedback Website!
stephane495
Berichten: 5
Lid geworden op: 06 apr 2021, 22:06
Locatie: France

10 apr 2021, 23:34

Indeed, I found the capacitor kit for 544 in your shop (sorry for my lack of Dutch understanding :/ ).

Do you have the reference list of the capacitors to replace in the kit ?

It seems the kit is composing around 23 capacitors but on the service manual I found 28 electrolytic capacitors to change.
Gebruikersavatar
Thomas
Site Admin
Berichten: 11958
Lid geworden op: 16 jun 2005, 15:55
Locatie: Lochem, Gelderland
Contacteer:

11 apr 2021, 14:02

These are all the capacitors in the kit:

C 220uF - 16v
c516 4,7uf - 16v
c518 47uf - 16v
c523 47uf - 25v
c525 33uf - 16v
c526 22uF
c528 1000uF
c535 4700uf - 35v
c537 10uf - 25v
c540 47uf 40v
c539 10uf - 16v
c542 10uf - 16v
c544 470uf - 16v
c550 22uF
c551 10uf - 63v
c554 4,7uf - 16v
c560 470uf - 16v
c565 680uf - 35v
c576 22uF
c578 4,7uf - 16v
c579 4,7uf - 16v
c581 330uF - 16v
c586 10uf - 50v
c587 22uf - 35v
c588 6800uF

It replaces all electrolytic caps in the complete electronic circuit.
Thomas Baur
webmaster http://www.mfbfreaks.com
De Enige Echte Philips Motional Feedback Website!
Plaats reactie