Sharp GX-BT3 (serv.man4) Service Manual ▷ View online
GX-BT7
– 1
CHAPTER 7. CIRCUIT SCHEMATICS AND PARTS LAYOUT
[1] Notes On Schematic Diagram
[2] Types Of Transistor And LED
•
•
•
Resistor:
To differentiate the units of resistors, such symbol as
K and M are used: the symbol K means 1000 ohm
and the symbol M means 1000 kohm and the
resistor without any symbol is ohm-type resistor.
Besides, the one with “Fusible” is a fuse type.
To differentiate the units of resistors, such symbol as
K and M are used: the symbol K means 1000 ohm
and the symbol M means 1000 kohm and the
resistor without any symbol is ohm-type resistor.
Besides, the one with “Fusible” is a fuse type.
Capacitor:
To indicate the unit of capacitor, a symbol P is used:
this symbol P means pico-farad and the unit of the
capacitor without such a symbol is microfarad. As to
electrolytic capacitor, the expression “capacitance/
withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
To indicate the unit of capacitor, a symbol P is used:
this symbol P means pico-farad and the unit of the
capacitor without such a symbol is microfarad. As to
electrolytic capacitor, the expression “capacitance/
withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
Schematic diagram and Wiring Side of P.W.Board
for
for
this
model
are
subject
to
change
for
improvement without prior notice.
•
•
The indicated voltage in each section is the one
measured by Digital Multimeter between such a
section and the chassis with no signal given.
measured by Digital Multimeter between such a
section and the chassis with no signal given.
Parts
marked
with
“
”
are
important
for
maintaining the safety of the set. Be sure to replace
these parts with specified ones for maintaining the
safety and performance of the set.
these parts with specified ones for maintaining the
safety and performance of the set.
PWB Switch Location
REF. NO
DESCRIPTION
POSITION
SW770
SW776
SW776
SW778
SW779
SW779
SW780
ON/STAND-BY
ON-OFF
PAIRING
Esound
VOLUME UP (+)
VOLUME UP (+)
VOLUME DOWN (-)
ON-OFF
ON-OFF
SW777
FUNCTION
ON-OFF
ON-OFF
ON-OFF
E(
1)
(2
)B
(3)
C
KRC102S
KRC104S
KRC107S
B
5
7
8
2
C
T
K
7
2
2
8
T
S
P
KTC3875
SLI343YC3F
SK52B
RB051L
B
(3)
E
(1)
C
(2)
TOP
VIEW
GND
OUT
VDD
NC
1
4
2
3
A
A
C
C
TOP VIEW
DA1010
TOP VIEW
EXA694WJ
EXA720WJ
EXA701WJ
KTA1544T
M3NB2SDO
A = Anode
C = Cathode
7 – 1
GX-BT7
7 – 2
[3] Schematic Diagram
Figure 7-1: MAIN SCHEMATIC DIAGRAM
MAIN PWB-A1
7
8
9
10
11
12
A
B
C
D
E
F
G
H
1
2
3
4
5
6
AUDIO IN
CNP162
TO
SWITCH PWB-A5
CNP770
TO
KEY PWB-A2
CNP760
TO
REMOTE SENSOR
PWB-A5
CN2
FROM
SMPS PWB-B
CNP604
TO
LED DRIVER PWB-A3
FOR
USB EXTERNAL
DEVICE ONLY
GX-BT7
7
– 3
Figure 7-2: KEY, LED DRIVER, REMOTE SENSOR AND SWITCH SCHEMATIC DIAGRAM
SWITCH PWB-A5
REMOTE SENSOR PWB-A4
KEY PWB-A2
LED DRIVER PWB-A3
7
8
9
10
11
12
A
B
C
D
E
F
G
H
1
2
3
4
5
6
FROM
MAIN PWB-A1
CNP602
FROM
MAIN PWB-A1
CNP601
BI600
FROM
MAIN PWB-A1
FROM
LED DRIVER PWB-A3
TO
LED R-CH
TO
LED L-CH
FROM
MAIN PWB-A1
CNP607
FPC Connector Ass’y Section
for Left and Right
for Left and Right
GX-BT7
7 – 4
[4] Chart Of Connecting Wires
Figure 7-3: WIRING CONNECTION
1 2 3 4
1
1
2
2
1
2
2
1
GY
CR 2
(2 TURN)
RD
BK
WH
BK
BK
WH
BK
BK
TO
SUBWOOFER R-CH
GY
GY
BK
BK
2
3
4
4
1
2
3
4
2
3
4
2
CN2
1 2
2
1
RD
BK
N
L
1 2
BL
BR
1
1
1
1
1
1
2
3
4
5
6
7
2
3
4
5
1
2
3
4
5
1
2
3
4
5
6
7
2
3
4
5
6
7
8
9
23
12
3
2
3
4
5
6
2
3
4
5
6
7
8
9
FOR
USB EXTERNAL
DEVICE ONLY
AUDIO IN
GY
CNS600
CNS800
CNS901
GY
RD
RD
RD
RD
BR
GY
GY
CR3
(2 TURN)
AC POWER SUPPLY CORD
CR1
CLAMP CORE
(1 TURN)
TO
DOOR MOTOR
TO
LED R-Ch
TO
LED L-Ch
FFC607
FFC607
FFC602
FFC601
FFC601
BR
COLOR TABLE
RD
GY
GY
BK
BROWN
RED
GRAY
BLACK
+
-
TO
SUBWOOFER L-CH
+
-
AC 100-240V~ 50 / 60Hz
RD
BK
BK
(Not Replacement Item)
+
-
TO
SPEAKER R-CH
WH
BK
TO
SPEAKER L-CH
+
-
CNS107
FPC [L]
FPC [R]
7
8
9
10
11
12
A
B
C
D
E
F
G
H
1
2
3
4
5
6
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