Power Supply Block - Pioneer SC-LX90 Service Manual

1

4.9 POWER SUPPLY BLOCK

POWER SUPPLY BLOCK DIAGRAM
A
T1501
ATS7411
TRANSFORMER
4
B
6
C
D
ICE REG ASSY
AWX8751
E
F
32
1
2
BA
ADC SUPPLY BLOCK
IC4111
NJM7805FA
+5V
DAC SUPPLY BLOCK
IC4121
LM2940CT-5.0
+5V
A-REG ASSY
AWX8761
ANALOG SUPPLY BLOCK
Q4134
2SK2979
-18V Rough Lock
IC4132
NJM79M15FA
-15V
TUNER SUPPLY
IC4133
NJM78M12FA
+12V
Q4133
2SJ 539
+18V Rough Lock
IC4131
NJM78M15FA
+15V
VIDEO SUPPLY BLOCK
IC4152
NJM7905FA
-5V
Q4152
2SJ 539
+8V Rough Lock
IC4151
NJM7805FA
5V
AP
ICE 5 ASSY
AQ
AWX8968
IC4803
ICE+5V
NJM7805FA
+5V
IC4804
ICE-5V
NJM7905FA
-5V
IC4851
ICE+12V
Double
NJM78M12FA
voltage
+12V
rectification
IC4852
ICE-12V
NJM79M12FA
-12V
ICE 12 ASSY
AR
AWX8969
2
3
COMPONENT ASSY
Z
AWX8726
S-VIDEO ASSY
Y
AWX8725
COMPOSITE ASSY
X
AWX8778
V-5V
V+5V
DA+5V
A-15V
A+15V
AD+5V
A-15V
A+15V
C
Audio ASSY Block
V-AUDIO
A-AUDIO
VOLUM
AUDIO BRIDGE 1
MULTI CH IN
ASSY
PREOUT
AWX8764
RECSEL
A-BRIDGE2,3,4
to iPOD
M
Firewire
USB
USB ASSY
AWX8867
Q7103
2SD1664
+9V
T+12V
A+15V
V
ICE AMP
for Modulator
MOTHER 1 ASSY
AWX8770
IC8022
3.3V
ICE AMP
NJM2880
for Modulator
IC8001
MAIN uCOM
SC-09TX
3
4
AE
HDMI ASSY AWQ7038
DAC ASSY AWX8723
small
S
regulator
MAIN DIGITAL ASSY
DSP ASSY
AWX8721
small
AD Part
IC117
regulator
NJM288
Q 0
3.3V
IC101
AWX8868
DSP
uCOM
SUB DIGITAL ASSY
AWX8747
IC1901
RF
DeMod
ulator Other IC
UNREGULATED V+8IPOD
IC4752
V+5IPOD
NJM78M05
FRONT IN
FRONT INPUT Block
A+15V
AUDIO IN BUFFER
A-15V
MIC AMP
V+5V
VIDEO INPUT
FRONT BUFF
V-5V
BUFFER
NPRY
N
NEW ITEM ASSY
AWX8741
IC7204
IC7201
Q7203
IC7001
2SD1664
NEWITEM
+12V
uCOM
LOGIC IC
IC8023
3.3V
NJM2880
AC
IC8021
3.3V
IC6411
NJM2872
3.3V
NJM2880
3 5
IC6301
3 5
DISPLAY
uCOM
IR 232C ASSY
AWX8746
4
small
regulator
small
regulator
O
J
FRONT
USB ASSY
P
AWX8781
FRONT Display Block
K
LCD
L
Mai
AD
MOTHER 2
AWX8776
uCOM SUPP
IC8503
5.6V
NJM78M56
+10V HDMI FA
Q4014
2SD1858
HDMI ASSY
A ICE RY D
FAN Dri
PFC ASSY
B ON+12V
PQ20RX1
STBY SUPP
FAN
IC4002
+5.6V
AXM7034
SW
POWER
STBY: ON
IC6201
EVENT uCOM
BC
PRIMA
AWX8