Sharp DX-SX1 (serv.man2) Service Manual ▷ View online
DX-SX1H
– 41 –
•
The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas-
sis with no signal given.
1. In the tuner section,
sis with no signal given.
1. In the tuner section,
( ) indicates AM
< > indicates FM stereo
< > indicates FM stereo
2. In the main section, a tape is being played back.
3. In the deck section, a tape is being played back.
3. In the deck section, a tape is being played back.
( ) indicates the record state.
4. In the power section, a tape is being played back.
5. In the CD section, the CD is stopped.
5. In the CD section, the CD is stopped.
•
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.
parts with specified ones for maintaining the safety and
performance of the set.
NOTES ON SCHEMATIC DIAGRAM
•
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.
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 micro-micro-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
symbol P means micro-micro-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 this
model are subject to change for improvement without prior
notice.
notice.
Figure 41 TYPES OF TRANSISTOR AND DIODE
SW51
PLAY
ON—OFF
SW52
STOP
ON—OFF
SW101
POWER
ON—OFF
SW201
SACD/CD
ON—OFF
SW202
PREV
ON—OFF
SW203
PAUSE
ON—OFF
SW204
PLAY
ON—OFF
SW205
STOP
ON—OFF
SW206
NEXT
ON—OFF
SW207
OPEN/CLOSE
ON—OFF
SW301
FILTER
ON—OFF
REF. NO
DESCRIPTION
POSITION
TOP VIEW
TOP VIEW
3
C
2
1
DAN202K
DAP202K
2SC1740 SR
KTA1266 GR
2SC2878 B
KTA1266 GR
2SC2878 B
2SA1955 A
DTA114 TK
DTC114 YK
2SC2412 KR
DTC114 EK
DTA114 TK
DTC114 YK
2SC2412 KR
DTC114 EK
DTC124 EK
DTC323T
DRB491D
DTC323T
DRB491D
2SA1037 KR
2SD2061 F
E
(1)
C
(2)
B
(3)
FRONT
VIEW
(1) (2) (3)
FRONT
VIEW
B
E
RB521S30
11ES4
(2)
(1)
(3)
TOP
VIEW
VIEW
(2)
(1)
(3)
TOP
VIEW
VIEW
2SD1858 R2
(1) (2) (3)
FRONT
VIEW
DX-SX1H
– 42 –
IC201 VHiMN12510F-1: FL Driver (MN12510F)
18
VDD
Power supply terminal
Input
VDD: +5V
±
0.5V
21
VSS
VSS: 0V
16
VPP
FLP driver power supply
Input
VPP: VDD - 35V
Applies voltage to pull-down resistor SEG0-7 and DGT0-7.
Applies voltage to pull-down resistor SEG0-7 and DGT0-7.
19
OSCI
Clock input
Input
Oscillation input terminal
20
OSCO
Clock output
Oscillation output terminal
To OSCI in case of clock input from outside by separately excited
oscillation.
To OSCI in case of clock input from outside by separately excited
oscillation.
22
NCS
Chip select input
Input
L: Serial input permitted
H: Serial input prohibited
H: Serial input prohibited
23
SCK
Serial clock input
Input
Clock input for serial transfer
24
SDI
Serial data input
Input
Serial data input:
Command data, address data, indication data, control register
data or port output data is input.
Command data, address data, indication data, control register
data or port output data is input.
25*
SDO
Serial data output
Output
Serial data output:
Key scan input data or port input data is output.
Key scan input data or port input data is output.
26*-30*
P30-P34
Key scan input
Input/Output
5 bits.
Can be switched to key scan input, general-purpose input or
general-purpose output by bit unit.
The pull-down resistor is between VSS terminals.
General-purpose output: high current output for driving LED
Can be switched to key scan input, general-purpose input or
general-purpose output by bit unit.
The pull-down resistor is between VSS terminals.
General-purpose output: high current output for driving LED
31-38
SEG0-SEG7
High tension output
Output
8-bit high tension output port. (Segment output)
Output type is Pch open drain, and pull-down resistor is built in
between VPP terminals.
Output type is Pch open drain, and pull-down resistor is built in
between VPP terminals.
39-42
P10-P13
High tension output
Output
4-bit high tension output port.
SEG8-SEG11
Can be switched to general-purpose output/segment output by bit
unit. Output type is Pch open drain.
unit. Output type is Pch open drain.
43,44,
P20-P23
High tension output
Input/Output
4-bit high tension output port.
1,2
DGT12/SEG15-
Can be switched to general-purpose input/general-purpose output/
DGT15/SEG12
segment output/digit output by bit unit.
Output type is Pch open drain.
High current output for driving LED
Output type is Pch open drain.
High current output for driving LED
3-6
P00-P03
High tension output
Output
4-bit high tension output port.
DGT8-DGT11
Can be switched to general-purpose output/digit output by bit unit.
Output type is Pch open drain.
Output type is Pch open drain.
7-10,
DGT0-DGT7
High tension output
Output
8-bit high tension output port. (Digit output)
12-15
Output type is Pch open drain, and pull-down resistor is built in
between VPP terminals.
between VPP terminals.
11*
NC
—
—
Not used.
Pin No.
Terminal Name
Name
FUNCTION TABLE OF IC
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Input/Output
Function
)
Used to connect ceramic oscillation
terminal.
terminal.
Figure 42 BLOCK DIAGRAM OF IC
S B ( 8 )
L A T C H ( 8 )
LATCH(5)
D G T ( 1 6 )
S E G ( 1 6 )
MPL
MPL
MPL
NCS
SCK
SO1
SO0
VPP
VDD
VSS
OSC1
OSC2
8
8
5
4
4
4
4
4
4
4
4
4
4
K E Y
M A T R I X
F L P
D0
D7D8
D11
S11
S8 S7
S0
P34
P30
DS12
DS15
(P00)
(P03)
(P20)
(P23)
(P13)
(P10)
TIMING
GENERATION
CIRCUIT
INSTRUCTION
DECODER
SHIFT REGISTER
( 8 x 3 2 ) x 2
5 x 1 2
DX-SX1H
– 43 –
IC102 VHiBP5220++-1: DC/DC Converter (BP5220)
Pin
No.
No.
Terminal
Name
Function
1
FB
Feedback terminal
2
VOUT
Output terminal
3
GND
GND
4
CTL
ON, OFF terminal
5*
N.C.
Not used
6*
ADJ
Output voltage fine adjustment terminal
7*
N.C.
Not used
8*
—
Cut pin
9
VIN
Input terminal
In this unit, the terminal with asterisk mark (*) is (open)
terminal which is not connected to the outside.
terminal which is not connected to the outside.
9
VIN
7
N.C.
N.C.
N.C.
5
N.C.
4
CTL
3
GND
2
VOUT
1
FB
6
ADJ
POWER
CIRCUIT
DRIVING CIRCUIT
CONTROL CIRCUIT
Figure 43-1 BLOCK DIAGRAM OF IC
1
RSTN
Input terminal with pull-up
System reset input (Reset at L)
2
ADRS1
Input terminal with pull-up
Chip address set terminal 1
3
ADRS2
Input terminal with pull-up
Chip address set terminal 2
4
DVDD
—
Digital VDD
5
LOUT
Output
L channel audio output
6
LIN
Input
L channel audio input
7
AVDD
—
Analog VDD
8
VRL
Output
Capacity connecting terminal for L channel reference voltage (VDD/2)
9
VRR
Output
Capacity connecting terminal for R channel reference voltage (VDD/2)
10
AVSS
—
Analog VSS
11
RIN
Input
R channel audio input
12
ROUT
Output
R channel audio output
13
DVSS
—
Digital VSS
14
MLEN
Input terminal with pull-up
Microcomputer latch enable input
15
MCK
Input terminal with pull-up
Microcomputer clock input
16
MDT
Input terminal with pull-up
Microcomputer data
Pin No. Terminal Name
Input/Output
Function
IC301 VHiSM6451AV-1: Volume Control (SM6451AV)
Figure 43-2 BLOCK DIAGRAM OF IC
RSTN
ADRS1
ADRS2
DVDD
LOUT
LIN
AVDD
VRL
MDT
MCK
MLEN
DVSS
ROUT
RIN
AVSS
VRR
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
5
LOUT
8
VRL
7
AVDD
10
AVSS
9
VRR
12
11
ROUT
RIN
13
DVSS
4
DVDD
3
ADRS2
2
ADRS1
1
RSTN
16
MDT
15
MCK
14
MLEN
6
LIN
I/F CONTROL
REFERENCE
VOLTAGE CIRCUIT
ATTENUATION
CONTROL
ATTENUATION
CONTROL
ATTENUATION DECODER
CHIP
ADDRESS
DECODER
DX-SX1H
– 44 –
IC302 VHiDSD1700E-1: DSD Converter (DSD1700E)
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not
connected to the outside.
connected to the outside.
1
DGND
—
Digital ground
2
VDD
—
Digital power supply, +5V
3
RST
Input
Reset control input, active at LOW
4*
PHASE
Input
Select data phase
(LOW: through, HIGH: inversion)
(LOW: through, HIGH: inversion)
5
AGND
—
Analog ground
6
VCC
—
Analog power supply, +5V
7
AGND
—
Analog ground
8,9
VCC
—
Analog power supply, +5V
10
AGND
—
Analog ground
11
VCC
—
Analog power supply, +5V
12
AGND
—
Analog ground
13
I
OUT
HN
Output
Analog output from DAC (Hot negative)
14
I
OUT
CP
Output
Analog output from DAC (Cold positive)
15
I
OUT
CN
Output
Analog output from DAC (Cold negative)
16
I
OUT
HP
Output
Analog output from DAC (Hot positive)
17,18
AGND
—
Analog ground
19
VCC
—
Analog power supply, +5V
20
AGND
—
Analog ground
21,22
VCC
—
Analog power supply, +5V
23
AGND
—
Analog ground
24
VCC
—
Analog power supply, +5V
25
AGND
—
Analog ground
26
DATA
Input
Direct stream digital data input
27
DCK
Input
Data clock input
28
SCK
Input
System clock input
Pin No. Terminal Name Input/Output
Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
19
20
21
22
23
24
25
26
27
28
18
17
16
15
DGND
V
DD
RST
PHASE
AGND
V
CC
AGND
V
CC
V
CC
AGND
V
CC
AGND
I
OUT
HN
I
OUT
CP
SCK
DCK
DATA
AGND
V
CC
AGND
V
CC
V
CC
AGND
V
CC
AGND
AGND
I
OUT
HP
I
OUT
CN
DSD I/F
PHASE
I
OUT
HP
I
OUT
HN
I
OUT
CP
I
OUT
CN
DATA
RST
DSK
SCK
DGND
AGND
V
DD
V
CC
ANALOG FIR
(HOT/P)
ANALOG FIR
(HOT/N)
ANALOG FIR
(COLD/P)
ANALOG FIR
(COLD/N)
DUTY
GENERATOR
DUTY
GENERATOR
POWER
SHIFT
REGISTER
(HOT)
SHIFT
REGISTER
(COLD)
TIMING
GENERATOR
Figure 44 BLOCK DIAGRAM OF IC
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