Sharp GX-BT3 (serv.man4) Service Manual ▷ View online
GX-BT7
4 – 12
-MEMO-
GX-BT7
5 – 1
CHAPTER 5. CIRCUIT DESCRIPTION
IC Voltage at Bluetooth Stand-by condition
Power Supply: 230 V 50 Hz
57
0
1
2.4
1
12.3
1
NC
1
0
58
0
2
0
2
12.3
2
5.2
2
0
59
0
3
2.3
3
7.4
3
5.2
3
0
60
3.2
4
NC
4
12.3
4
0
4
0
61
0
5
1.3
5
12.3
5
0
5
3.2
62
NC
6
12.3
6
5.2
6
3.2
63
0.1
7
NC
7
3.2
64
1.3
1
3.2
8
0
8
1.6
65
3.2
2
NC
1
0.1
9
1.4
66
3.2
3
NC
2
0
10
1.5
67
3.1
4
NC
3
0
1
0
11
0
68
0
5
NC
4
0
2
0
12
0
69
2.9
6
NC
5
0
3
0
13
3.2
70
3.2
7
NC
6
0
4
9.1
14
1.3
71
NC
8
3.2
7
NC
5
12.3
15
2.9
72
NC
8
NC
6
6.2
16
0
73
0
9
NC
7
0
17
0
74
0
1
12.3
10
0
8
6.2
18
0
75
3.2
2
5.3
11
NC
9
6.2
19
0
76
1.5
3
0.7
12
0
10
6.2
20
0
77
2.9
4
0
13
NC
11
6.2
21
0
78
1.6
5
1.3
14
NC
12
6.2
22
0
79
1.6
6
12.3
15
NC
13
6.2
23
0
80
1.6
7
12.3
16
0
14
0.01
24
3.2
8
12.3
17
0
15
0.01
25
0
18
0
16
0
26
0
19
3.3
17
1.6
27
3.2
1
0
20
1.8
18
1.6
28
0
2
3.1
21
0
19
1.6
29
5.2
3
NC
22
3.4
20
1.6
30
1.3
4
NC
23
NC
21
2.6
31
3.2
5
NC
24
NC
22
2.6
32
3.2
6
3.1
23
2.6
33
0
7
NC
24
2.6
34
0
8
3.2
1
NC
25
3.4
35
0
2
5.2
26
NC
36
0
3
5.2
27
NC
37
NC
1
11.3
4
3.2
28
NC
38
3.2
2
12.3
5
3.2
29
NC
39
0
3
3.2
6
NC
30
1.6
40
3.2
4
1.8
7
5.2
31
1.6
41
0
5
0.8
8
NC
32
1.3
42
3.2
6
0.6
9
NC
33
0.01
43
1.6
7
0
10
5.1
34
3.1
44
1.7
8
5.0
35
0
45
1.3
36
2.6
46
0
1
0
47
1.6
1
0
2
0
48
0.03
2
0
3
2.9
1
2.3
49
0
3
0
2
2.3
50
0
4
0
3
2.3
51
3.2
5
3.2
1
NC
4
0
52
3.2
6
0
2
1.9
5
2.3
53
0
7
3.1
3
0
6
2.3
54
0
8
3.1
7
NC
55
0
8
NC
56
0
MAIN PWB
IC 560 (V)
IC 803 (V)
IC 800 (V)
IC 400 (V)
IC 600 (V)
IC 900 (V)
IC 540 (V)
IC 603 (V)
IC 801 (V)
IC 602 (V)
ICA100 (V)
IC 804 (V)
ICA 605 (V)
IC 802 (V)
IC 601 (V)
GX-BT7
6 – 1
CHAPTER 6. DIAGRAM
[1] Main/Amplifier Block Diagram
Figure 6-1: MAIN/AMPLIFIER BLOCK DIAGRAM
30
29
28
27
10
13
OUT_1 A
OUT _1B
OU
T
_
2
B
OUT
_2
A
A
33
34
MCLK
BICK
LRCK
SDI
RESET
SDA
SCL
31
F
R
ONT
S
PEAKER
TERMINA
L
I2S
Pairing, Volume Up, Volume Down, Funcon, Esound
KEY1
POWER KEY
24 MHz.
On/Standby
38
ADC_CH_0
67
ADC_CH_1
43
44
PI24M
H
Z
PO24M
H
9
6
B
A
34
2
6
EEPROM
5
6
SD
A
SCL
59
MCLK
58
51
52
_
SCL
_S
D
A
57
BICK
AUDIO
IN
Jack
L-Ch
R-Ch
72
75
LAUX
RAUX
_
UP
71
76
LIN
RIN
OTK5262
CURRENT
LIMITER
D+
D-
D-
5V DCDC
Motor Driver
BA6287
3
5V/3A
4
5
USB Jack
5V/2.1A
SPI Flash IC
7
1
2
3
33
34
USB D+
USB D-
26
25
24
SPI_FLASH _D2
SPI_FLASH _D1
SPI_FLASH _CS
23
SPI FLASH D3
47
USB POW EN
46
54
MOT +
MOT -
66
63
OPEN_SW
CLOSE_SW
SWITCH
56
57
LRCK
SDI
48
AMP RESET
L+
L-
R+
R-
NFC
BLUETOOTH
MODULE
F-3088
4
6
5
1
2
6
IR
DA
62
BT
_
W
AKE
_
4
11
BT
_L
ED
2
LE
D_
CL
K
12
LED DRIVER IC
(16 port)
2
4
3
1
2
3
LE
D_S
D
I
L
E
D_LE
8
PWCLK
7
6
5
21
22
23
SPI_FLASH _D0
SPI_FLASH _D3
SPI_FLASH _CLK
53
5
9
PI32KH
Z
P
032KH
Z
10
OP AMP
21
Front Speaker (L-Ch)
Front Speaker (R-Ch)
3
Ω
3
Ω
SUBWOO
F
ER
SPEAKER
TERM
INAL
Subwoofer Speaker
12
Ω
Subwoofer Speaker
12
Ω
32.768 kHz.
EQ Level
Meter
ADC
Pairing Led (Blue)
USB Led (orange)
Running Light : Blue LED X 8 pcs (L-ch)
Running Light : Blue LED X 8 pcs (R-ch)
APPLE IC
IC602
IC601
IC600
IC804
SW161/SW162
ICA100
IC603
IC400
JK580
Y1
POWER AMP IC
JK500
IC560
IC540
IC604
X601
LED701
LED700
RM760
IR
Sensor
BT
_
V
OL
-
B
T_VO
L+
17
16
15
14
IC900
GX-BT7
6 – 2
[2] Voltage And Current Block Diagram
Figure 6-2: VOLTAGE AND CURRENT BLOCK DIAGRAM
12V, 2A
SMPS
DC DC
CONVERTER
SW 5V, 3A
MCU USB_PWR
SW 5V, 2.1A
MCU USB_PWR
TO USB
JACK
UNSW 3.9V
SW 5V
AC
100V~240V
50/60 Hz
IC802
STEP DOWN 3.3V
DC DC
CONVERTER
MCU DC RELAY
MCU DC RELAY
UNSW 5V
TO OTK5262,
BT OP AMP,
RUNNING LEDs
TO POW IC,
LED DRIVER,
APPLE IC
SW 3.3V
SW 12V
UNSW 1.3V
SW 2.3V
LDO 1.3V
MCU DC RELAY
TO
OTK5262
TO OTK5262,
REMOCON,
LEDs,
SPI FLASH
UNSW 3.3V
TO
BLUETOOTH
BLUETOOTH
UNSW 3.9V
TO POWER IC
!
IC804
IC801
IC800
IC803
MOSFET
ICA100
Q802
Q831
CURRENT
LIMITER
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