CDX-GT828U/GT870US/GT878US
CDX-GT828U/GT870US/GT878US
19
19
1 ANT
SCL
SDA
CDMON
CDON
ELECTRONIC VOLUME
IC401
J1
(ANTENNA)
TU1
(TUNER UNIT)
POWER AMP
MULTIPLE VOLTAGE REGULATOR
IC300
SYSTEM CONTROL
IC303 (1/2)
CN300
(REAR)
(FRONT)
(REAR)
(FRONT)
BATT
6
S-METER
7
TUN MUTE
5
QUALITY
9
RDS OUT
8
MUTE CON
BU+3.3V
GT828U
11
VDD+5V
4
L-CH
3
R-CH
BU+3.3V
10
VCC+8.3V
CD ON
CDM ON
CD L
CD R
CD-RCH
A ATT
TU-RCH
AUDIO+8.3V
AUDIO+8.3V
R-CH
AUDIO+8.3V
BU+5V
SERVO+3.3V
MECHA+6V
PANEL+B
SDA
SCL
13
7
10
12
11
16
1
9
2
4
3
5
6
SCL
E-CLK
E-DATA
S OUT
SDA
SCL
SDA
FL+
FL–
RL+
RL–
FR+
FR–
RR+
RR–
AMP-REM
ANT-REM
ACC
MUTE
Q452
REAR
MUTE DRIVE
Q491,492
RESET
ACC DETECT
Q702
BATT
BATTERY
CHECK
Q605
MUTE
Q352
MUTE
Q405
MUTE CONTROL
SWITCH
Q403
MUTE
Q440
S OUT
E-DATA
E-CLK
D491
FU601
FRONT
R-CH
R-CH
L
-3
-4
-5
-6
-1
-2
R
J652 (2/2)
CN410
R-CH
R-CH
L
R
SUB OUT
(MONO)
D602
BATT
BATT
CNJ400
(BUS CONTROL IN)
D603
D353
BUS INTERFACE
IC601
STB
BATT
+5V REG
Q3
NS MASK
Q1
B+ SWITCH
Q50,51
RDS DEMODULATOR
IC50
15
E2PVDD
13
SCL
16
E2PSCL
17
E2PSDA
14
SDA
BU+5V
TEL ATT
14
ILL
AUX
BUS AUDIO IN
J901
AUX-RCH
BUS-RCH
AUX-RCH
BUS-RCH
CD-RCH
TU-RCH
ZMUTE
W/U OUT
EJECT OK
CD RX
CD TX
VBUS ON
OPEN REQ
Z MUTE
SYS RST
MECHA+6V
BU+3.3V
SERVO+3.3V
B/U CHECK
RXD
TXD
DR+6V
BU+3.3V
A+3.3V
CDON
CDMON
ZMUTE
WAKE UP
W/U OUT
SYSRST
EJECT OK
EJECT OK
BU IN
OPEN REQ
VBUS ON
VBUS ON
OPEN REQ
CD TX
CD RX
CD
MECHANISM
UNIT
(MG-101I)
(1/2)
SCL
SDA
X50
8.664MHz
SYSRST
BU-IN
ILL DETECT
Q703
BATT
J652 (1/2)
L
R
-1
-2
TEL-ATT DETECT
Q701
2
1
7
8
3
5
4
6
AUDIO
OUT
• Signal Path
• R-CH is omitted due to same as L-CH.
J
: CD PLAY
K
: FM
L
: AUX
f
: MW or AM
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
J
J
K
L
g
g
L
K
f
K
g
: BUS AUDIO
5-1. BLOCK DIAGRAM – MAIN Section –