Read JBL SB 250 (serv.man3) Service Manual online
MAIN UNIT BLOCK DIAGRAM
Woofer
6 ohm
Tweeter
8 ohm
Woofer
6 ohm
Tweeter
8 ohm
USB
OPTI
AUX
BT
BM153
CS42528
PIC32MX450F256L
MCU
FRONT PANEL(KEY/LED)
OP
NJM4580
NJM4580
Auto On
DET
XTAL
CS48L11
DSP(Dobly digital)
SW
FLASH
XTAL
EEPROM
16Kbit
8MB
IR
LDO
+1.2V
+3.3V
+5V
+5V
+3.3V
DC/DC
+5V
LDO
+5V
SW
LDO
+3.3V
SW
SMPS 19V/3A
Upgrade
TPA3118
G9091-330T11U
MEP4435Q8
AP2305AGN
AZ1117H-1.2VTRE1
LM1117MPX
TPS54231
12.288MHz
4MHz
24C16
I2S
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