Luxman L 4 Service Manual
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Extracted text from Luxman L 4 Service Manual (Ocr-read)
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.
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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)
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(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