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WX-GT77UI/GT78UI/GT78UIM
WX-GT77UI/GT78UI/GT78UIM
19
19
8
4
F
10
A
15
E
3
D
11
C
9
G
7
H
1
5
2
J
6
B
I
14
13
12
BOARD
(2/3)
MAIN
1
2
MAIN BOARD (3/3)
IC B/D
IC B/D
3.1
7.2
3.1
7.2
14.4
7.2
7.2
8.3
7.7
7.7
7.7
7.7
8.2
7.2
7.2
14.4
7.2
3.3
7.2
3
13.7
13.7
8.3
0 <3.3>
6.1
10.5
14.4
14
5.1
3.3
5.1
3.2
3.3
0
0
13.6
13.9
0.6
3
0.6
0
0
0
14.4
0
5.3
1.5
1.6
2.7
3.2
0
3.3
5.1
2.5
0.1
5.3
0
5.1
25V
22
C303
0
R302
0
R301
10V
C325
1000
0.22
C301
0.22
C302
0.22
C313
0.22
C312
0.22
C322
0.22
C323
0.22
C702
0.22
C703
250uH
L701
1
C305
1
C304
1
C307
1
C306
1
C309
1
C308
1
C31
1
1
C310
0.01
C316
0.01
C318
0.01
C320
0.01
C324
0.01
C330
16V
10
C319
16V
10
C321
16V
10
C317
0
R306
6.3V
330
C328
43
12
XC61CN2802NR
IC303
VOUT
VIN
NC
VSS
100k
R307
100k
R707
1k
R702
4.7k
R703
MAZ8180GMLS0
D705
MAZ8180GMLS0
D706
MAZ8180GMLS0
D704
MAZ8180GMLS0
D702
MAZ8180GMLS0
D703
4.7k
R701
1000p
C704
1000p
C705
16V
3300
C701
1N5404-C311-3
D701
1SS355WTE-17
D707
1SS355WTE-17
D901
10k
R705
10k
R706
2SC3052EF-T1-LEF
Q701
TEL-ATT DETECT
2SC3052EF-T1-LEF
Q702
ILL DETECT
2SC3052EF-T1-LEF
Q703
ACC DETECT
22k
R708
47k
R704
47k
R709
47k
R710
0.47
C707
0.47
C708
4.7k
R711
RT1N141C-TP-1
Q907
J701
(REMOTE IN)
L702
L703
L704
RT1P141C-TP-1
Q906
16V
47
C913
25V
470
C602
TH601
0
R605
0.1
C601
MAZ8180GMLS0
D601
MAZ8180GMLS0
D605
14
13
12
11
10
9
8
7
6
5
4
3
2
1
BA8271F-E2
IC601
BUS_ON
RST
BATT
CLK
VREF
DATA_I/O
GND DATA_OUT
DATA_IN
BU_CHECK
CLK_IN
BUS_IN
RST
VCC
100
R602
100
R606
100
R601
R
T1N141C-TP-1
Q601
MAZ8180GMLS0
D607
1k
R608
15k
R607
1k
R604
1k
R603
MAZ8180GMLS0
D603
0.01
C603
330k
R609
150
R303
47p
C332
0
R304
47k
R305
330k
R610
2.2
C333
TDA8588AJ/N2/R1
IC301
1
TA
B
2
I2C_SIO
3
OUT
-FL-
4
I2C_SCK
5
OUT
-FL+
6
VP2
7
OUT
-RL-
8
P-GND1
9
OUT
-RL+
10
SVR
11
IN-RL
12
IN-FL
13
S-GND
14
IN-FR
15
IN-RR
16
BEEP
17
OUT
-RR+
18
P-GND3
19
OUT
-RR-
20
VP1
21
OUT
-FR+
22
STB
23
OUT
-FR-
24
P-GND4
25
DIAG
26
RST
27
ANT
-REM
28
CRES
29
AMP-REM
30
AUDIO+B (8.5V)
31
SER
VO-3.3V
32
GND
33
MECHA-6V
34
PA
N
EL
+B
35
VP
36
CBU
37
BU+B
G
G
G
J601
(BUS CONTROL IN)
8P
7
8
4
5
6
5
6
1
2
3
2
3
I
VSS
O
XC6218P332PR
IC302
D309
1A4-A2
D307
1A4-A2
D310
1A4-A2
D308
1A4-A2
D311
1A4-A2
D306
1A4-A2
D312
1A4-A2
D305
1A4-A2
1
C314
W1
W2
MAZ8062GMLS0
D606
50V
4.7
C706
CN701
16P
1
FL+
2
RL+
3
RR+
4
FR+
5
AMP-REM
6
ANT-REM
7
ACC
8
GND
9
FL-
10
RL-
11
RR-
12
FR-
16
+B
13
TEL-ATT
14
ILL
15
TEST
17
+B
18
+B
19
+B
47
R913
0.1
C329
MAZ8068GMLS0
D708
MA2ZD140GLS0
D604
0.01
C334
IN-FR
IN-FL
IN-FL
HOT_GND
IN-RR
IN-RL
IN-RL
MUTE
8.5V
3.3V
A-GND
PANEL+B
RESET
STB
DIAG
AT
T
MECHA+6V
8.5V
+B
A-GND
SER
VO+3.3V
I2C_SCK_C,I2C_SIO_C
BUS_ON,SYS_RST
,BU_CHECK,
ACC_IN,BEEP_C,ILL_IN,
I2C_SCK_C,I2C_SIO_C
I2C_SIO_C
I2C_SCK_C
BEEP_C
TEL_ATT
ILL_IN
ACC_IN
RC_IN0
RC_IN1
RC_IN1
UNISI
UNISO
BU_CHECK
UNISCK
BUS_ON
SYS_RST
BUS INTERFACE
IC601
I2C BUS CONTROLLED
IC301
MAIN BOARD (1/3)
+3.3V REG
IC302
RESET
IC303
2
3
1
FU601
10A
Q601
BATTERY
CHECK
POWER AMP/MULTIPLE
VOLTAGE REGULATOR
MUTE DRIVE
Q906,907
RC_IN0,RC_IN1,TEL_A
TT
UNISCK,UNISI,UNISO
13
REAR
AMP REM
2
12
ILL
ACC
+
7
6
4
16
14
10
BATT
L-CH
+
15
-
R-CH
1
FRONT
3
-
-
5
L-CH
9
-
+
11
+
GND
R-CH
REAR
ATT
FRONT
8
ANT REM
4-4. SCHEMATIC DIAGRAM – MAIN Section (1/3) –
• See page 27 for IC Block Diagrams.
(Page 21)
(Page 20)
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