Sony CDX-GT490US - Page 24

CDX-GT49UM/GT490U/GT490US/GT494U CDX-GT49UM/GT490U/GT490US/GT494U
2424

• IC Block Diagrams
IC301 TDA8588AJ/N2/R1 (MAIN Board (1/3)) IC402 TK11133CSCL-G (MAIN Board (1/3))
MUTE
MUTE
ENABLE
LOGIC
STANDBY/
MUTE
BATTERY
DETECTION
CHIP DETECT/
DIAGNOSTIC
PROTECTION/
DIAGNOSTIC
SWITCH
REGULATOR
SWITCH
REFERENCE
VOLTAGE
LOADDUMP
PROTECTION
TEMPERATURE
PROTECTION
BACK-UP
SWITCH
REGULATOR
1 3 5 7 9
11 13 15 17 19 21 23 25 27 29 31 33 35 37
2 4 6 8
10 12 14 16 18 20 22 24 26 28 30 32 34 36
TAB
OUT-FL–
OUT-FL+
OUT-RL–
OUT-RL+
IN-RL
S-GND
IN-RR
OUT-RR+
OUT-RR–
OUT-FR+
OUT-FR–
DIAG
ANT-REM
AMP-REM
SERVO-3.3V
MECH-6V
VP
BU+B
I2C_SIO I2C_SCK VP2 P-GND1 SVR IN-FL IN-FR BEEP P-GND3 VP1 STB P-GND4 RST CRES
AUDIO+B (8.5V)
GND PANEL+B CBU
FL RL
RR
VP
FR
I
2
C BUS
1 2 3 5 4
CONT
GND
NOISE
VIN
VOUT
OVERHEAT &
OVERCURRENT
PROTECTION
BAND GAP
REFERENCE
CONTROL
CIRCUIT
1 2
RC
GND DRV ISNS VCC
SS
3COMP 4FB
SOFT-START
AND
OVERCURRENT
700mV
ENABLE E/A E/A AND SS REFERENCE
7 8 6 5
UVLO
OSC
PWM
LOGIC
DRIVER
IC501 TPS40200DRG4 (MAIN Board (2/3))