Read Sharp GX-BT3 (serv.man4) Service Manual 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
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