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very low frequency tech postings - hard/repair_of_an_ICF-PRO80.writeback

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Fri, 02 Jan 2004

repair of an ICF-PRO80
similar to the ICF-PRO70

English below
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Mein SONY ICF-PRO80 hatte das Problem, dass Lautsprecher und Kopfhörer nur extrem leise zu hören waren. Hier beschreibe ich kurz meine erfolgreiche Reparatur.
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The speaker and headphone output of my SONY ICF-PRO80 were very very silent. Here I describe how I successfully repaired it.

A snap of the disassembled ICF-PRO80:
[o]

A snap of the amplifier board:
[o]

Some of the capacitors leaked a bit:
[o]

I decided to replace most of the caps, they seem to be really bad, as the volume increased on most of the capacitors I replaced.
Amp-board with the replaced caps:
[o]

I replaced
4x 47uF/6.3V
2x 47uF/16V
1x 220uF/16V
1x 470uF/10V

You may also get your Sony ICF-70/80 fixed here.
Here's a short description on the ICF PRO 80.

6 writebacks

writebacks...

Victor Gomez wrote

cx6av
Thank you for this page of help.I have one ICF Pro 80 and he´s died, only i receive a weak signal in FM broadcasts, but low in all the sounds, in MW and all SW i don´t receive signal... Can you mark in this photos with an arrow the capacitors changed with the respectively value in mf? . Thanj you very much from Uruguay.Regards

mazzoo wrote

All photos show the device with the original capacitors, except the last one, where I replaced them. Just compare the 2nd and the last photo. There are 3 Cs replaced on the bottom right, an five on the bottom left. Matthia

Kurt wrote

Repair ICF-70 and 80 Pro
Well, I repaired some pcs, but all electrolytic smd c´s must be replaced incl. the inhoused dc-dc-converter for tuning voltage! Only the not smd-elyts (2x) on lower pic. are ok, also on processor board! Vy success! Kurt

nyjahan wrote

Thanks for the photos. I have no sound, not even a weak one. I was told the the transformers are burnt out. Can you confirm that and if so, which ones are they or where are they located. Thank you in advance. Regards, nyjahan.

Dan wrote

Cap Question
I was just given a Pro-80 for free. It has no sound but all other functions work. By no sound I mean no static and no beeps when I push the keypad digits. I think I see that you replaced some of the SM's with radial caps. Is that correct in what I see? I am going to try to do a recap on mine but SM's I have never done. Also, I can't find a service manual or schematic on line. Can you help with a schematic at least?

cheer wrote

Thanks
hi there, thanks very much for the photo and information, i have new in box sony icf pro 70 radio but it only works on fm and the sound is very very low, so i guess may have the same problem, could you please tell me where can we get those capicators and how much are they, thanks.

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