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Re: how to set up an intigrated amp to a 100 watt...
Audio connection must have matching in audio level and symetrical. 1-prepare your connection cabels(better to be colour marked at connector(red for right channel- white for left chanel). 2-take pre amp right out to power amlifier right in. 3-take pre amp left out to power amplifier left in. 4-connect amplifier right out to right loudspeaker. 5-connect amplifier left out to left speaker. 6-adjust volume level and enjoyyy.
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Can you please tell me exactly how you have the receiver wired. What I need is, for example, the left front speaker is wired to what? Do you have more than one speaker wired to to the same speaker terminal? For more information, or if you would like to inquire about having your Sony repaired, please visit my website at audioserviceclinic.com. By the way, I was a Sony Factory Authorized Service Center for over 30 years. Thank you.
I asked for more info, but I have replaced many hundreds of unobtainable transformers. All the voltages can be found by a bit of logic thinking & observation. If I have the item in front of me I will have the solution in minutes.
Double red with black, expecially together is normally a X-0-X winding, identified by the rectifier & smoothing caps. The voltages on them will give some indication, but tracing the voltage to an regulator is an accurate solution.
What are the voltages used for?
Normally the one winding will be a low voltage like 12-18 volt for the pre-amps mixers etc. This very often will go through oner or more voltage regulators. Their voltage is written on them,and they will have have small heatsink on them & live near the rectifiers & caps. Look for three legged items marked something like 7812. This is a 12 volt reghulater while a 7809 is a 9 volt regulater. The split voltage say from 20-0-20 to 80-0-80 max will drive the power amp. A 20 watt stereo amp will most likely use two integrated circuits. Luckily you can find their operating voltages very easily by typing in their number like TDS2005 into google. As for an output stage like a 60 to 100 Watt amplifier, a voltage like 60 0 60 and 80 0 80 is used. If in doubt, go a bit lower & play safe. All you will loose is a few watts. If logic (computer circuitry) is used, all computers use basic only 12 volt and 5 volt. Very easy.
Before you give up or look for a new transformeer, just check!!!!!
Most *** xformers have a secret fuse inside them which is easily replaced if you know how!
Send photos! (under 60Kb)
In most cases, you need a pair of Red/White RCA cables. Connect one set of ends (1 red + 1 white) to the external tuner's output and the other (white + red) to the input on the Amp.
Then you need double stranded wire to connect the speakers to the amp. one x double stranded wire for each speaker. You can use electrical cord from the hardware store (e.g. 18 gauge wire) or you can buy some speaker wire (16 to 20 gauge - use lower number wire (thicker) for higher power amp). 16 to 18 gauge wire for a 100 watt per channel amp if your speakers are less than 15 feet from the amp (wires are less than 15 feet long). If longer than 15 feet, use the 16 gauge wire. You can use 18 gauge for most anything else.
When the fuse keeps blowing you have an overload. The cause of which is either in the power supply or the main amp. It will almost for certain be a semi-conductor of some type acting like a piece of wire. A multi meter will show up a most faulty parts with this condition. On the Ohm setting applying the test probes to transistor terminals (E,C,B) you will get a responce like you had touch the probes together! The power transistors or whatever is on the heatsink are good at going short circuit, as people often short the speaker wires together.
Don't forget to check for burnt or damaged parts too.
As a rule of thumb with transistors when testing on a meter (1K setting) (best with moving coil scale meter than a digital) apply to base (B) and then to C & E you should get an ohms reading. If you don't get any reading (both ways) it's dead (open) and if the meter goes full scale - it's shorted.
The Deluxe may have more efficient speakers....which would cause it to sound louder. Also, the EQ settings could play a part in this. If the EQ's aren't set the same there could be a noticeable difference in sound.....usually the mids can have quite an effect on overall amp volume....
Its safe to connect your receiver to amplifier's AC socket / outlet. These units has 2 type of AC sockets, Switched and Unswithced. Switched AC outlet can be On-Off by unit itself.
Feel free to ask any more question.