Sony CDX-GT81UW / CDX-GT860U Service Manual ▷ View online
33
CDX-GT81UW/GT860U
• IC BLOCK DIAGRAMS
IC401 BD3442FS-E2 (MAIN Board (1/4))
1
2
BUS-L
100k
100k
100k
100k
100k
100k
250k
250k
250k
BUS-R
TU-L 3
4
TU-R
5
CD-L
6
CD-R
7
AUX-L
8
AUX-G
9
AUX-R
10
DS32
11
DS11
12
DS22
13
EBIAS
14
DS21
15
DS11
16
DS31
26 OUTF1
27 VCC
VCC
VCC2
28 MUTE
29 SCL
30 SDA
31 GND
32 FIL
INPUT
SELECTOR
VOLUME1
/MUTE
VOLUME2
I2C
BUS
LOGIC
TREBLE
/BASS
/MIDDLE
SPECTRUM
ANALYZER
FADER
25 OUTF2
24 OUT-R1
23 OUT-R2
FADER
FADER
22 OUTS1
21
20
OUTS2
19
ADJ
18
SOUT
17
DATA
CLK
FADER
FADER
LPF
EFFECT
INPUT
GAIN
FADER
IC702 LB1930M (MAIN Board (3/4))
IC703 BA09CCOWFP-E2 (MAIN Board (3/4))
DRIVER
VCC
2
1
3
5
4
TSD
N.C
OUT
N.C
VCC
CTL
OCP
OVP
VREF
1
2
2
3
4
5
6
7
8
9
10
VCC
RIN
SGND
FIN
NC
NC
OUT2
NC
PGND
OUT1
CONTROL
CIRCUIT
MOTOR
DRIVE
CIRCUIT
BUFFER
BUFFER
34
CDX-GT81UW/GT860U
IC402 NJM2792V (MAIN Board (1/4))
IC602 BD9781HFP (MAIN Board (4/4))
1
2
3
6
5
4
17
18
19
20
7
10
15
16
12
11
14
13
8
9
LIFT AMP
LIFT AMP
CIN (L)
OUT (RL)
RL–
RL+
VCC
RR+
RR–
OUT (RR)
CIN (R)
GND (R)
COUT (R)
OUT (FR)
FR–
FR+
REF
FL+
FL–
OUT (FL)
COUT (L)
GND (L)
SIGNAL AMP
FRONT-RIGHT
REAR-RIGHT
FRONT-LEFT
REAR-LEFT
SIGNAL AMP
SIGNAL AMP
SIGNAL AMP
TSD
OSC
LATCH
ON/OFF
SOFT
START
VREF
ERROR
AMP
PWM
COMPARATOR
DRIVER
VIN
CURRENT LIMIT
VIN
RESET
VREF
SYNC
L:OFF
H:ON
H:ON
1
RT
3
GND
4
FB
5
INV
6
SYNC
7
SW
2
35
CDX-GT81UW/GT860U
IC201 TDA8588AJ/N2/R1 (MAIN Board (2/4))
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
SW2(ANT-REM)
SW1(AMP-REM)
REG3(SERVO+5V)
REG4(DR+B)
VP(REG)
REG(BU+5V)
SDA
SCL
VP2
PGND3
SVR
IN-FL
IN-FR
AC_GND
PGND2
VP1
STB
PGND1
RST
CRES
REG1(AUDIO+B)
GND
REG5(ILL)
CBU
FL
RL
RR
VP
FR
I
2
C BUS
IC621 NJM2903M-TE2
(MAIN Board (4/4))
1
AOUT
AIN–
AIN+
GND
VCC
BOUT
BIN–
BIN+
2
3
4
8
7
6
5
36
CDX-GT81UW/GT860U
IC110 BA8271F-E2 (MAIN Board (4/4))
IC620 NJM2377M (TE2) (MAIN Board (4/4))
8
7
5
6
VREF
OSC
0.52V
30
µ
A
L.O
PWM
ER.AMP
S.C.P
U.VLO
IN
F.B
GND
OUT
REF
CT
CS
VCC
1
2
4
3
1
2
3
4
5
5
6
7
8
9
10
14
13
12
11
BUS ON
SWITCH
RESET
SWITCH
BATTERY
SWITCH
BUS ON
RST
BATT
CLK
VREF
GND
VCC
RESET
BUS ON
BUS ON
CLK IN
BU IN
DATA IN
DATA OUT
DATA
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