Luxman l 10 service manual

Page 1

SERVICE g3
MANUAL ,

SOLID STATE DC INTEGRATED
AMPLIFIER L40

Page 2

Semi-fixed VR Adjustment
Main Amp

Idling Current / PB-1139 VR402(L ch) PB-llAO VR502(R ch)

(1)

(2)

(3)

(4)

Disconnect the jumper lead between the printed terminals 27(TP-l) and
28(TP-2) of PB-ll39 on L ch of the main amp and 25(TP-1) and 26(TP-2)
of PB-llAO on R ch.

Connect a DC amperemeter in between 27 and 28 on L ch and or 25 and

26 on R ch, making 27 and 25 positive respectively.

Adjust the VR402 to obtain 80mA reading on the meter 5 minutes after
turning the power switch on.

Same should be done with the VRSOZ on R ch.

After each adjustment the jumper leads should be respectively

connected as before.

DC Offset / PB-ll39 VR401(L ch) PB-ll40 VR501(R Ch) SOD-ohm

(1) Connect a DC voltmeter to the speaker terminals and adjust the
VR401(L ch) and VR501(R ch) to obtain OViZOmV reading on the meter.
EQ OUT

DC Offset / PB-llél VRlOla(L ch) VRlOlb(R ch) 2K-ohm

(1)

(2)

Connect a DC voltmeter between the ground(chassis) and any adjacent
test point to the Cll4a of PB-llél and adjust the VRlOla to obtain
OViSOmV reading on the meter.

Same procedure should be taken with VRlOlb and test point adjacent

to the Cll4b on R ch adjustment.