Nice, you have glued the amp board caps too, me not because they are very small and the replacements have much thicker and stronger legs than factory jun fu junk. I will see after some years if it will fail because of no glue

This post has been edited by MichalD: Jul 6 2018, 04:21 AM

I soldered the amplifier caps with enough gap between to prevent touching each other. Time will show if it was enough...


Yep, with glue i meant the neutral non corrosive silicone

Hello, thank you. Here is the capacitor list i've used:

PSU board:

CK45-R3AD221K-NRA CAP CER 220PF 1KV RADIAL C2 30 28 29
RDER73A471K2K1H03B CAP CER 470PF 1KV X7R RADIAL C39 35 36 37 38
AR205F104K4R CAP CER 0.1UF 50V X8R RADIAL C63

LGR2D471MELZ40 CAP ALUM 470UF 20% 200V SNAP C59 60 69 70
100ZLJ330M12.5X35 CAP ALUM 330UF 20% 100V RADIAL C71 72
35ZLJ220M8X16 CAP ALUM 220UF 20% 35V RADIAL C64 73 74 75 76
50ZLJ100MT78X11.5 CAP ALUM 100UF 20% 50V RADIAL C65 78 66 67 77

450BXW68MEFR14.5X40 CAP ALUM 68UF 20% 450V T/H C61
35ZLJ47M5X11 CAP ALUM 47UF 20% 35V RADIAL C68 62

DE1B3KX471KA4BP01F CAP CER 470PF 300VAC RADIAL C7

CC45SL3FD470JYNNA CAP CER 47PF 3KV SL RADIAL C3
C317C101K2R5TA CAP CER 100PF 200V X7R RADIAL C9 46 45 44 43 42 41 40

RDER73A332K2K1H03B CAP CER 3300PF 1KV X7R RADIAL C6
RDER72J103K2M1H03A CAP CER 10000PF 630V X7R RADIAL C20 19 17 18
RDER72A104K1K1H03B CAP CER 0.1UF 100V X7R RADIAL C11 53 12 13 52 10 48 49 50 79
RDER73A472K2K1H03B CAP CER 4700PF 1KV X7R RADIAL C8

Amplifier boards:

UHW2A102MHD CAP ALUM 1000UF 20% 100V RADIAL C39
FK22X7R2A105K CAP CER 1UF 100V X7R RADIAL C40
RFS-50V2R2ME3#5 CAP ALUM 2.2UF 20% 50V RADIAL C86 89 85 88 84 87 91 81
RFS-50V220MH3#5 CAP ALUM 22UF 20% 50V RADIAL C79 83 78 82 77 90
UES1H4R7MEM CAP ALUM 4.7UF 20% 50V RADIAL C28 69 22 37 27 68 21 36 26 67 20 35 80

Audio processing board:

RFS-16V470MG3#5 CAP ALUM 47UF 20% 16V RADIAL APB C208
RFS-16V100ME3#5 CAP ALUM 10UF 20% 16V RADIAL APB all 10uF
RFS-50V220MH3#5 CAP ALUM 22UF 20% 50V RADIAL APB C211
RFS-16V101MH3#5 CAP ALUM 100UF 20% 16V RADIAL APB C220 218 202 201 221 219
UES1H4R7MEM CAP ALUM 4.7UF 20% 50V RADIAL APB C54 52 58 56 39 40 16 18 17 15

Relay clicking issue fix:

FG20X7R1H106KRT06 CAP CER 10UF 50V X7R RADIAL added another C63
FK26X7R2A104K CAP CER 0.1UF 100V X7R RADIAL added between TOP243Y's C and S PIN
FK26X7R2A105K CAP CER 1UF 100V X7R RADIAL added between TOP243Y's C and S PIN

This post has been edited by MichalD: May 15 2019, 03:24 AM

Finaly you are done with your set, great job . I like your red/black wiring, you have shorted the wires just for necessary length. Very nice!
What about the relay clicking issue in your case, it's gone too?

Hello.

1. Remove (scrape off) all glue from the board.
2. Do you have a digital multimeter with diode test function? If yes, check the D9 and D10. After that check C8 and R49.
3. If some of these components are failed your TOP243Y is probably failed too and need replace.
4. Your 470uF caps looks bulged and it's condition will not be okay i think.

This post has been edited by MichalD: Feb 22 2019, 03:20 AM

Digikey will send to you the parts in separate bags with part description, don't worry about indetification.

High hours capacitors i've used are one of the TOP Brand LOW ESR capacitors. There is direct relationship between low esr and shelf life. Lower ESR = lower self heating = can withstand higher ripple currents = greater lifespan. For what you need el cheapo crap low esr cap which is marked as low esr which can withstand only 2000 hrs if you can have branded rubycon or nichicon or so with 10000 hrs lifespan? Which will last longer you think?

I've rebuild the PSU board with the longest lifespan caps from top brands i've found.

Hi, that is great, capacitors replacing had its own effect

For these:

FK26X7R2A104K CAP CER 0.1UF 100V X7R RADIAL added between TOP243Y's C and S PIN
FK26X7R2A105K CAP CER 1UF 100V X7R RADIAL added between TOP243Y's C and S PIN

You can buy locally any other suitable replacement. These are for the relay clicking / control pod reseting issue fix, not necessary to add but you will meet the problem described upper in my topic.

You can use adhesive but without chemicals which could cause damage the corrosion of PCB traces or other parts on the PCB.

Yes you can damage it while scratching the old glue, you need to be carefull, but the traces are repairable if you are a bit skilled in soldering. Use leaded solder.

Lex was not using cleaning chemicals i think, just patience and accurate hand. Try to use some plastic needle or tweezers to scrape off, but some glue blobs are too deep for plastic tools. It depends on the degree of glue degradation, if it is still moldable plastic or dryed out.

Be carefull when desoldering 470uF big caps. You need to good preheat the pads becuase the are deep and full of solder, use solder sucker. If not you may damage the sensitive pad.

Good luck.

The blue cap is OK, but covered by old glue. Just gently scrape it off or replace with new choose 300VAC for better safety margin.
The panasonic cap is OK.


R15 is 220k 2W or more wattage and R16 is 100k 2W or more wattage. For larger wattage make sure if can be fitted.

For the fuse measure dimmensions of the blowned one. I think it is 5x20 not 5x15. 3.5A rating is enough.

Hello,

1. Yes, ceramic will better withstand heat produced from nearly heatsink.
2. You can't replace these with polar capacitors, you need to use bipolar capacitors only. Bipolar caps doesn't matter which polarity are connected.

This post has been edited by MichalD: May 8 2019, 03:03 PM

Yes you can use this bipolar...don't have time to check whole part list now, seems OK.

What is amfi board? Amplifier board? If Ampflifier board so it ist 47B code which means 3.01 kΩ (≤1%)

This post has been edited by MichalD: May 9 2019, 01:27 AM

Pictures you've posted are from power supply board, not an amplifier board. R44 on power supply board is 22 ohm and about 2 - 3 W. I think the resistors are functional, just scraped part of outer coating. Try measure it for resistance.

Great, i am glad to helped you. Nice picture with thank message

This post has been edited by MichalD: May 10 2019, 05:17 AM

Audio processing board, here:

Yep, sorry my bad, 22uF 50V is used in both, audio procesing board and amp. boards and i accidentally put C211 to amp. board part list.

Yep, i edited it already in my first partlist post.

This post has been edited by MichalD: May 15 2019, 02:59 PM

Hello, there is no official repair shop for S750, you must repair it on your own or try ask in some repair shops near your location.

Hi comrade, you need disassemble the subwoofer box and check the power supply board for visible damages and bulged capacitors. All is described in this topic. Just scroll all the way up and read a see the pictures follow the procedures. The unit is very easy to diagnose and repair just with a basic skilled electrotechnician with just only a digital multimeter with basic of measeurements and soldering skills. Good luck.

Google translator: Привет товарищ, вам нужно разобрать коробку сабвуфера и проверить плату блока питания на видимые повреждения и выпуклые конденсаторы. Все описано в этой теме. Просто прокрутите весь путь вверх и прочтите фотографии, следуя инструкциям. Устройство очень легко диагностировать и ремонтировать, используя только квалифицированного электротехника, имеющего всего лишь цифровой мультиметр с базовыми навыками измерения и пайки. Удачи.

There is no schematics for he amplifier or audio processing boards availible. I've asked creative company directly but they don't provide schematics for theirs products sadly. Only way to get the schemes is to redraw it by visual. I don't understand how someone in charge with repairing electronics can't find the fault. This sound system is overcomplicated but very easy to diagnose. Especialy the PSU board where are no complicated parts such as chips or microprocessors. Just make sure that the PSU is working properly (measure the output voltages), if not, fix it first and after that go ahead to amplifier boards which are rare to fail, especialy STA575 which have some own protections inside. For the amp. boards check C39, 40, 41 caps and broken STA575 pins. Each STA757 drives 2 channels or subwoofer coils.

Hello, in general the heat dissipation in the power parts of the PSU board is poor, (cost effective) and cause fail of the unit over time, so it means it will warm up quite fast.

For the glue you can use any non-corrosive, non-conductive, non-reactive with metals and plastic materials made caoacitors from sealant or glue which can withstand long term 100+ °C without degrading.

This post has been edited by MichalD: Nov 6 2019, 04:57 AM