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Sony lbt v702 hifi system stack

Hi

I purchased 2nd hand but not sure where the ac cables go. The main ac cable to the mains is from the tuner. Then you have 3 ac cables which somehow connect up from the amp, cd player and equaliser. not sure where these go. Any suggection, please

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  • jd510
    jd510 Sep 22, 2008

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I have a sony stack system i had put away for a couple of years, i have now put it back together, but when i wire both speakers up, the sound go s to a point then cuts out, whith a mesage on the front saying protect, it i take one speaker off! nothing happens, can any one help please?
thak you for your time.
Steve.

Posted on Jan 26, 2010

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My sony 3 disc ex-change/mini hifi component system mhc-rg66 it keeps flashing...


First things first. The unit doesn't switch on.
- Is it plugged in?
- Is the fuse blown?
- Does it look like it's suffered damage?

It switches on, but won't play anything / the lights come on, but no sound.

- We'll start at connections. Is your MP3 player/ iPod/ CD player/ record deck plugged in correctly?
- Are the speakers plugged in correctly/ at all?
- Is it in protection mode - this is a pretty standard thing now, where the amplifier tries to deliver more than it's rated current (ie, into a short circuit), and it cuts out. The only way to fix this is to take it to a local hifi shop, who will reset it (there's usually a small fee involved). The unit will be fine after that.

------- There is no bass. ----------
A few causes for this, so there's a few solutions.
- The speakers are out of phase. This is where one speaker is wired normally, one is wired in reverse. The bass from each speaker is "opposite" and would cancel out. To solve this, Make sure the + on the speaker is connected to the + on the amplifier. There's usually a stripe on the cable to help you determine this.
Cause # 2
The eq settings on your ipod/ unit have been messed with.
Set all the equiliser settings to flat, then readjust them to taste.
Cause # 3 (nasty one)
You've blown a woofer. The explanation is this - the speakers have taken in too much power, the bass unit has got too hot and the glue holding the coil in place has melted. Usually, the woofer can't be physically pushed when this happens. To solve this, it's new speaker time. An alternative is to see if you can get a recone kit for said speaker, and try to fix the voicecoil yourself. This isn't recommended to those who are new to the idea.

I hope this helps the reader.
Chris

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Fault with the main power supply regulator. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

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If you want to buy one original main board, contact authorised service ccenter for sony.

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I have an old Sony LBT D505 (with a SONY TA D505 amp) its abundled system but for some reason it automatically sets source to tuner and i cant change source. I have checked the system control cables and...


it must be due to a bad connection if the cables are fine it may be the connectors or where they solder on to the amp or radio board if the amp with out the radio cables attached still will only select tuner its the amp fault, even worse i could be a faulty integrated circuit eg faulty micro chip good luck with finding a replacement

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Hi there I have a Sony LBT XG100AV Stereo System, at the moment it keeps flashing Protect push power, we were listening to music at the time when this happened is there any chance you can give me advice on...


I have the same unit, although it's a bit old now. I used to get that problem, and the protection system is to protect the unit from over-heating, and the main cause is its because the unit is getting hot and/or there isn't enough air going through the rear of the unit. I found a fan or better air flow helps.

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Sony midi Hifi switching itself off


These digital amps are very prone to blow if the speaker wires are shorted so Sony appear to have put in a protection system that mutes the amp when this happens. You have to unplug the amp for a minute till the light goes off, make sure no speaker wires are touching each other and then it should work ok. I found the same problem with one I bought 2nd hand.

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1 Answer

Pushed power protect


speaker protection turned on.it can be happend because of bad power amlifire section.can you remoove the powe ramp board with large heatsink.its very easy to repair.and i can help.
nuwan

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Dear krismedia

You should first confirm that Audio/Video output cable from the hifi is connected to the TV , then you should connect the game console to the input section in ur hifi system. And finally see if the TV is in AV mode and also see if the HIFI is detecting in the input mode.

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