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Luxman R-600
DC cables
Telefunken tube

Luxman R-600 Receiver


This is a restauration project about a Luxman R-600 Receiver built in the nineteen eighties.  I bought the receiver second hand as "defective" (the owner stated there was a hum when powered on). 


Lux Corporation from Japan produced (and still does) high-end audio equipment such as tuners and amplifier separates, but also a series of receivers (integrated tuner and amplifier) such as this R-600.


Unfortunately this unit had been standing uncovered in a garage and was in a sorry state cosmetically.  The walnut casing was filthy (yellow-ish from nicotene), the lettering was dull and dirty and the front panel was full of fingerprints, especially near the volume control knob and On/Off switch. There are some deep scratches to the aluminium front panel.


My first job was to clean the unit!  I unscrewed the casing and wiped it clean with a mild household detergent, the front and rear panels receiving the same treatment.  I used compressed air to dislocate dust that had been accumulating inside for years.  This is a first clean just so that I can work on the unit, trying to locate the said fault.



The Luxman R-600 Receiver with cabinet in walnut finish.





A sticker on the rear panel reads "R-600E II" so presumably this is a R-600 type receiver adapted for the European market and a Mark II model.  It is labeled for 220V (correct at the time) and it has a 2-pin European mains power plug fitted.


The Serial Number is D5702219.  I have no idea how this breaks down. 


There is a small Quality Control sticker with a '87 stamp (and a number) on.


There is another sticker stating that this unit was manufactured by Universal Appliances Ltd. in Hong Kong, under license from Lux Corporation. 


There are 2 auxiliary AC outlets (one switched and one unswitched), interestingly they are fitted with US-type sockets (2 vertical pins).



Rear panel, left.  Push connectors for 2 speaker pairs.

Rear panel, right.  Antenna connections at the top and inputs/outputs at the bottom.





The controls are straightforward and all knobs do exactly what they say ...


Front panel, left.  Input selector and Bass/Treble left and right knobs.

Front panel, right.  Volume (L/R) and speaker selector, tuning knob, On/Off switch.





A few photographs showing the receiver's inside.



The RF section is at the top, the audio amplifier section is at the bottom.

Detail of the audio power transistors.

Detail of the 3-gang variable capacitor used for the RF tuning section.

Detail of the cabinet inside edge and the European 2-pin mains power plug.

Detail of the ventilation grilles.  So don't remove them from the outside!





When I was cleaning the unit I observed the following:


AN277A by Matsushita, a 16 pin DIL integrated circuit used in the tuner section.  I could not find a datasheet on this particular circuit, however, AN277B is listed as "AM/FM IF Amplifier".


A3301 9K1 by Sanyo, a 14 pin DIL integrated circuit used in the tuner section.  The A3301 is listed as "FM Demodulator / Stereo Decoder". 


2SC1030 by Hitachi.  It is listed as a low frequency power silicon NPN transistor in a TO-3 casing.  Four transistors with mica insulators are mounted on a single heat sink.


A 3-gang variable capacitor is used in the tuner section.


A slide switch for 50/75uS (de-emphasis) sits next to the tuner section.


The transformer is set fixed to 220V (a protective cover sits over the voltage switch).


The power supply looks "standard", consisting of transformer, rectifier and electrolytic capacitor.  The elco is 4700uF/80V, a radial model is used.  I could not see a bridge rectifier but noticed 2 beefy diodes, type still to be identified.


The audio output is [possibly] capacitor coupled.  I noticed two 2200uf/50V capacitors on the amplifier board.



Transformer, elco, mains voltage setting (covered), de-emphasis switch and RF PCB.

RF section PCB with AN277A and A3301 integrated circuits.



Unfortunately I do not have the Luxman R-600 Service Manual.  I would rather not go to the sharks that sell such manuals (often PDF copy) on the Internet.  Lux Corporation did not help either as they pointed me to a dealer who, well ... did not help. 


My view is that Lux Corporation should make Brochures, User Manuals and Service Manuals of vintage equipment freely available for download over the Internet, like a number of companies manufacturing electronic test equipment already do.  That would be a first class customer service!


Can you help with a Service Manual or schematic (circuit diagram) hardcopy or a good quality scan?  It would be much appreciated to facilitate fault finding and tracing.



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