Read JBL SB 400 Service Manual online
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Zou WanYong
VER:1.0
SB400 System Block DIAGRAM
I2C BUS
SPI
4M
SPI Flash
SST25VF080B
DA/LRCK
DA/SCLK
DA/SD0
D S P
C S 497014
UPMIXING Matrix
Dolby DECODE
SUB Volume Control
Virtual Surround
Bass Management System
Wireless
transmitter
subwoofer
I2S
Module
74LVC541APW
SWITCH
SI
L-
M
C
LK
CS-MCLK
I2S
MCLK
HDMI
SIL9573
HDMI IN 1
HDMI IN 1
HDMI IN 1
HDMI DSD I2S X4
SIL-SDATA0/DSD1
SIL-LRCK/DSD1
SIL-SCLK
SIL-SDATA0/DSD0
SIL-SDATA1/DSD3
SIL-SDATA2/DSD2
HDMI OUT
DSP I2S
SPI-DA01-LRCK
SPI-DA01-SCLK
SPI-DA01-DO/HPS
SPI-DA01-SCLK
SPI-DA01-DO/HPS
SPIF
CS42528(3/3)
D/AC
Volume Control
L_W CH
TPA3116D2
Power amp
L_T CH
L_Woofer
Class D
8 Ohm
4 Ohm
15W
20W
R_W CH
TPA3116D2
Power amp
R_T CH
R_Woofer
Class D
8 Ohm
4 Ohm
15W
20W
L_Tweeter
R_Tweeter
M C U
LED Temp (5 LED)
5 KEY
KEY CONN SYSTEM
POWER SUPPLY
AC 100V\240V 50Hz/60Hz
BRIDGE
IC ----
REGULATOR
TRANSFORMER
MOSFET
+5V
+20V
IC ---
MOSFET
MOSFET
STM32F105RCT6
AC Input
SDAND-BY
S1
AC-SW
IR
AUDIO A/DC
CS42528(1/3)
L
R
Converter
IC 4580
OP
Line_IN
3.5mm Jack
Blue Module
Input
SPDIF-IN
Optical input
CS42528(2/3)
DIGITAL AUDIO
Interface Receiver
DET
Outo ON
L_Woofer
8 Ohm
20W
R_Woofer
8 Ohm
20W
+VCC
BK5V
+5V
+1.8V OUT
AMC1117
+5V
+5V OUT
LDO
-5V OUT
IC
CLOLK
24.576MHz
256K
1M
SPI Flash
SST25VF040B
I2C
HDMI ARC SPDIF
2K
EEPROM
AT24C02
+5V
+3.3V OUT
AMC1117
BM153
Clock:26MHz
SPDIF IN
JBL
SB 400 Service Manual
Page 27 of 30
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