Luxman L-10 integrated amplifier

General: 

This amplifier was produced in the 1980's, its a great product with outstanding specs.

 

Photos:

Front

 

[   ]

Detail back

 

Interior view

 

Special futures:

This amplifier has real separated amps and completely separated power supplies. It has tape dubbing and a tone compensator.

 

Schematic:

Click here to download the Luxman L10 service manual in PDF format

 

Modifications:

SERVICE WARNING:
When you service the Luxman L10 amp you should be aware of the fact that the power
supply capacitors keep the full +/- 45V = 90 V supply voltage on them when the amp is switched off,
even when completely taken off the mains supply and even after being weeks out of use.
These caps should be discharged by qualified service personel the proper and safe way with 100 Ohms resistors.
If you fail to respect the full & correct manual discharge of the power supply caps,
you will almost certainly damage the power amplifiers and possibly all output transistors,
also improper discharge of these caps may be dangerous for your health.
The Sanken output transistors of the L10 are out of production and not sold anymore and
there is NO replacement transistor that is suitable and gives the same exceptional
performance of the Luxman L10 amplifier.
All L10 amplifier models with different output transistors may sound well,
however do not meet the original L10 specs of Luxman.

Some parts should be upgraded after many years of service:

The R417 - 10K Ohms resistor in the main amps should be replaced by a at least 1 Watt type.

The DML's of this amp should be replaced by discrete parts as discribed on this website.
Take a look at the Luxman C12/M12 page of this website for more DML info.

   DML-01 version 2.

Some other electrolytic capacitors in this amp may be subject to replacement.

Remove possible upgrade impedance amplifier boards out of the circuit, situated between RIAA- and power- amp.
Audioscript, the former distributor in the Netherlands, inserted such impedance amps equipped
with two common-grade opamps, remove this one in all but one situations:
Leave these boards in the amp ONLY when you use a European make tape deck with
high impedance DIN in- & outputs, like a Tandberg or a Revox.

Below photos of such additional pcb, this one from Audioscript Netherlands. As you can see one of the
capacitors has exploded and spread some its contents over the pcb and so corroding components,
requiring a repair some years later, the left IC has been exchanged, its a common grade op-amp.
PCBs like these do not meet the quality standard of the L10 amplifier at all, so take them out of your L10
or seriously upgrade these amps, if you really need them.

 

Sound:

These series of Luxman audio components soon got ledgendary by their outstanding build quality and exceptional good quality sound.

© Hans Hilberink - PE1MMK ® - Last update: 26-06-2010.