Pioneer SC-LX81 Service Manual

28
SC-LX81
1
2 3 4
A
B
C
D
E
F
1
2 3 4
4.6 POWER BLOCK DIAGRAM
V+5.6U
34
+BB +B
3
-BB -B
2
-B+10V
8
V+12L
V-12L
V+12R
V-12R
V+12C
V-12C
V+12SL
V-12SL
V+12SR
V-12SR
V+12SBL
V-12SBL
V+12SBR
V-12SBR
4
V+5_MD
V-5V_MD
6
V+12DF
V-12DF
V+12RY
V-12RY
6 3 COOLING FAN
V+FAN
V-FAN
2
V+12TRG
22
V+12HD
5
V+12A
5
V-12A
V+6AD
V+5.6U
V+7A
V-7A
V+12HD
V+12A
V-12A
V+6AD
2:/KU,/JJ
3:/H*,/LF
55
V+12TRG
V+5.6V
V-5.6V
V+5.6ST
V+12TRG
V+5.6V
V-5.6V
V+12TRG
V+5.6ST
V+5.6U
6
V+5.6U
V+5.6ST
-VF
V+5.6U
FLA
C1
FLAC2
V
+5.6ST
DISPLAY ASSY
CONPONENT ASSY
AUDIO
ASSY
REG ASSY
FRONT BRIDGE ASSY
PRIMARY ASSY
T8701
STBY Trans
IC8711
NJM78M56FA
+5.6V
T1501
POWER TRANS
B DIODE
ASSY
B REG
ASSY
Q7300
2SD2083(Y)
+64V
RECTIFIER
D7400,D7401,
C7400,C7401
(+70V/-70V)
Q7301
2SB1383(Y)
-64V
ICE REG ASSY
Q7241
2SD1763A(DE)
-B+11V (-53V)
Q7242
2SB1186A(DE)
-6.9V
IC7252
NJM79M12FA
-12V
IC7251
NJM78M12FA
+12V
Q7241
2SD1763A(DE)
+6.9V
IC7271
NJM78M05FA
+5V
IC7272
NJM79M05FA
-5V
Q7201
Q7202
TO OUTPUT STAGE
TO GATE DRIVER
TO MODULATOR
TO INPUT STAGE
TO PROTECTION RY
IC7502
NJM79M12FA
-12V
IC7501
NJM78M12FA
+12V
IC7521
NJM78M06FA
+6V
IC7611
NJM78M12FA
+12V
IC7601
NJM78M56FA
+5.6V
IC7602
NJM79M05FA
-5.6V
D7625
PTZ24(B)
-24V
D7624
HZU6R2(B)
-30V
Q5601
2SD1664(PQR)
+9V
Q5501
2SD1858X(QR)
+7V
Q5502
2SB1237X(QR)
-7V
TUNER MODULE
V+5.6U V+T12R
D6002
RR264M-400
+5V
Q6015
2SC4154(EFG)
+3V
D6003
RR264M-400
-5V
Q6016
2SA1602A(EF)
-3V
V+5V
V+5V
V-5V
V-5V
V-3V
V+3V
HDMI RECT
ASSY
RECTIFIER
D8801,C8801
(+15.5V)
G
I
AV
T
K
Q
Y
X
W
ICEPOWER AMP ASSY
AA

Pioneer SC-LX81 Specifications

General

Brand	Pioneer
Model	SC-LX81
Category	Receiver
Language	English