I have a TECHNICS STEREO AMPLIFIER (SU-Z450)
AT THE BACK SIDE OF AMP ITS RETURN SU-Z450-KEK AND SERIAL NO.FA55Z2A470
I WANT TO KNOW HOW MANY WATT RMS AMPLIFIER IS. AND THE VOLUME CONTROL IS ALSO TO BE SERVICED THEIR IS A VARIABLE VOLUME CONTROL SLIDING TYPE ITS VALVE IS 50K ON VC BUT ITS A OR B I DONT KNOW PLS HELP
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I assume you want to use the SU-G91 as a power amplifier to drive your speakers. If your receiver has connections for inserting an equalizer (may be labeled pre-amp output and power amp input), remove the jumpers between the pre-amp and the power amp, then run cables from the pre-amp to the SU-G91 inputs. You can have an equalizer between the receiver and the integrated amplifier. If this is not available, use the recording output (for a tape recorder on older receivers). Note that the volume control on the receiver will be bypassed with this connection.
Being a 500W amplifier, you need to connect speakers with 300W each. The correct method to connect speakers is red terminal of speaker should be connected to red terminal of amplifier & black to black. The left side to left side speaker & right to right speaker. There may be main & remote terminals. Main speakers are the speakers at local place of the amplifier & remote for remotely placed speakers. I do have Technics SU-V85A which is somewhat similar. Enjoy! A nice piece to listen.
Usually this is a defect in the output amp IC. If you have no experience with repairs of these types of units, have it checked by a service shop. If the output AMP IChas failed, it will cost about $75 for a replacement. This unit uses an RSN3306P IC .
THe amp has detected a problem and shutdown to prevent further damage. This unit has 2 amp pacs inside and one or both have failed. If you can solder, you can fix this yourself. The main amp pac is an SVI3206 and can be purchased online for about $60.
unfortunately the technics site is in chinese or japanese and has absolutely no products on it at all. but, judging from the model #, i would say that it is probably a 450 watt amp. this is fairly typical for amp names/model#s, however, logitech does not use this, they seem to use the number of channels as the first number in the series, then use the wattage. some others use other different naming schemes. but this is generally correct.