Luxman L 4 Service Manual

Page 1

SERVICE
MANUAL

SOLID STATE STEREO L- 4

INTEGRATED AMPLIFIER

Page 2

Idle Adjustment

(1) Detach the fuses from the fuseholders (F401) fixed on PD1257.

(2) Connect a DC amperemeter to each fuseholder (F401)

(Print terminal is positive.)

(3) Adjust VR40l to obtain SOmA reading on the meter 1 minute after

turning the Power Switch on.

(4) Same procedures from (1) to

against Rch.

DC Offset Adjustment

(This is for Lch.)

(3) should be taken on F501 of PB1258

(1) Measure to confirm at the speaker terminals or between R-out and L-out

terminals and the ground that DC voltage is within the limit of iSOmV.

Replaceme2£_2232§_£122

E§219é2é_Yier

3222_E2221_駧Lz

SYMBOL STOCK DESCRIPTION
NO. NO.
(Knob)
l WH1079 Balance
2 WH1080 Treble
3 WH1080 Bags
4 WHlOSl Main VR.
5 WJ1089 Power
6 WJllO6 Speaker
7 WJ1107 Select

STOCK

NO. DESCRIPTION
ACOOOZ DIN Connector
ATOOSO SP Terminal
UCll33 Rear Panel (S)
UCll34 Rear Panel (E)
UCll35 Rear Panel (U)

Eestieg_M§£2£iel

(Front Panel Ass'y)

8 WA1166 Front Panel
9 WD1089 Escutcheon
lO WE1066 Protector
11 WE1086 Protector
12 WL1062 Name Plate
13 WQlOl7 Fiber

STOCK
NO. DESCRIPTION
XA1208 Carton
X31023 Pad
ME0122 Owner's Manual

(Switch and Volume)

l4 RV0206 50K Treble VR

15 RV0207 100K Bass VR

l6 RV0223 200K Main VR

l7 RV0205 250K Balance VR

18 SP0106 Select SW

19 SP0107 Speaker sw

Chassis)

20 PT2379 Power Trans (U)
PT2380 Power Trans (S)
PT2381 Power Trans (E)

21 UGlOlO Bonnet (S,E)
UGlOZl Bonnet (U)

22 WNOOO7 Foot