Sony CDX-GT121 Service Manual page 26

CDX-GT121/GT220/GT222
• IC Block Diagrams
IC401 BD3442FS-E2 (MAIN Board (1/4))
BUS-L 1
100k
BUS-R 2
INPUT
100k
SELECTOR
TU-L 3
100k
TU-R 4
100k
CD-L
5
100k
CD-R
6
100k
AUX-L
7
250k
AUX-G 8
250k
AUX-R 9
250k
DS32
10
DS11 11
DS22 12
EBIAS 13
DS21
14
DS11
15
DS31 16
IC51 TDA7333013TR (MAIN Board (1/4))
BAND PASS
INTERPOLATOR
VDDA 1
REF3 2
REF2 3
RDS
RDSREG
REF1 4 INTN
DEMODULATOR &
SYNCHRONIZATION
VSS 5
TM 6
VDDD 7
RESETN 8
CDX-GT121/GT220/GT222
INPUT VOLUME1 TREBLE VOLUME2
GAIN /MUTE /BASS
I2C
/MIDDLE
BUS
LOGIC
FADER
EFFECT
FADER
FADER
FADER
FADER
LPF
FADER
SPECTRUM
ANALYZER
3
SINC4 SIGMA DELTA
16 MPX
FILTER FILTER CONVERTER
15 INTN
SDAOUT
RAM
SDAIN 14 CSN
BUFFER TEST LOGIC
2 SCK
I C/SPI 13 SA
& &
SPI
INTERFACE
12 SDA
CONTROL PIN MUX'S
TESTREG
11 SCL
LOGIC
2
10 XTO
OSCILLATOR
9 XTI
VCC2 32 FIL
31 GND
30 SDA
29 SCL
28 MUTE
VCC 27 VCC
26 OUTF1
25 OUTF2
24 OUT-R1
23 OUT-R2
22 OUTS1
21
OUTS2
20 ADJ
19
SOUT
18 DATA
17 CLK
26 26
IC750 TDA8589BJ/N2/R1/M5 (MAIN Board (2/4))
TAB 1
OUT-FL- 3 2
I C BUS
FL
OUT-FL+ 5
OUT-RL- 7
RL
OUT-RL+ 9
IN-RL
11
S-GND 13
PROTECTION/
DIAGNOSTIC
IN-RR
15
VP
OUT-RR+ 17
RR
OUT-RR- 19
OUT-FR+ 21
STANDBY/
FR
MUTE
OUT-FR- 23
CHIP DETECT/
DIAGNOSTIC
BATTERY TEMPERATURE
DIAG
25
DETECTION PROTECTION ENABLE
LOGIC
SWITCH
ANT-REM 27
AMP-REM 29 SWITCH
SERVO5V 31
MECH6V 33
VP 35
REFERENCE
VOLTAGE
LOADDUMP BACK-UP
B.UP+B 37
REGULATOR PROTECTION SWITCH
2 SDA
4 SCL
6
VP2
8
PGND3
10 SVR
IN-FL
12
14 IN-FR
16 BEEP
18 PGND2
20 VP1
22 STB
24 PGND1
26
RST
28 CRES
30 AUDIO8.3V
32 GND
34 PANEL+B
36
CBU