Service manual
Page 52
to DSP_CB303
H1
Page 52
to DSP_CB300
B1
Page 52
to DSP_CB302
G1
Page 54
to AMP_CB7
K3 Page 54
to AMP_CB7
K3
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
C1+
V+
C1
C2+
C2
V
DOUT2
RIN2
VCC
GND
DOUT1
RIN1
ROUT1
DIN1
DIN2
ROUT2
IC2: MAX3232CDWR
On Screen Display Controller
52
Display
controller
Segment
digit
select/
output
circuit
Serial
receive
circuit
Digit
output
circuit
Clock
generator
DIG11/
SEG42
51
DIG12/
SEG41
50
DIG13/
SEG40
49
DIG14/
SEG39
48
DIG15/
SEG38
47
DIG16/
SEG37
46
DIG17/
SEG36
45
SEG35
XOUT
6
Vcc1
8
Vcc2
18
Vss
5
Vp
64
XIN
7
CS
SCK
3
SDATA
4
RESET
1
SEG00
44
9
SEG34
SEG26
17
19
SEG25
Segment
output
circuit
Display code
RAM
(8-bit x 60)
CGROM
(35 bit x 166)
CGROM
(35 bit x 16)
code
select
Code
write
Code/
command
control
circuit
DIG00
63
53
DIG10
IC1: M66003-0101FP
FL Display Driver
2
data
timing
clock
dot data
write
scan pulse
POINT A-3 pin 3 of IC3 POINT B-1
① Q14(E)
AC cable ON
② Q13(C)
AC cable ONAC cable OFF
A
1
2
3
4
5
6
7
8
9
10
BCDEFGH I JKL MN
YSP-1
SCHEMATIC DIAGRAM (INPUT)
53
★ All voltages are measured with a 10MΩ/V DC electronic volt meter.
★ Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
2.7
0.4
4.3
0
5.0
4.1
0
5.0
3.4
15.0
11.2
0.1
3.1
3.1
-25.5
-25.5
-25.5
-25.5
-22.5
-22.5
-22.5
-22.5
-22.5
-22.5
-22.5
-22.5
-22.4
-22.4
-25.5
-20.9
-20.8
-16.1
-20.8
-22.4
-19.3
-22.4
-20.8
-20.8
-19.3
-17.7
22.4
-19.3
-22.4
-17.7
-17.7
-24.0
-20.8
-24.0
-17.6
-17.7
-24.0
-19.2
-24.0
-17.7
-17.7
-23.9
-20.8
-24.0
-17.6
-17.7
-17.7
-17.7
-17.7
-17.7
-18.0
-18.0
3.2 3.2 3.2
3.2
3.2 3.2
3.2 3.2
-17.7
-17.7 -20.8
-17.8
-17.7
-20.9
-24.0
-17.7
-23.9
-24.4
-19.3
13.7
5.7
5.7
0.3
3.3
3.3
5.9
5.3
5.9
0
0
-17.7
-22.4
-22.4
-19.3
-22.4
-17.7
-17.7
-24.0
-20.8
-24.0
-17.6
-17.7
-24.0
-19.2
-24.0
-17.7
3.2
-20.9
-20.9
-24.0
-17.6
-17.7
-17.7
-17.7
-17.7
-17.8
3.2
1.5
1.5
0
3.2
3.2
3.2
3.2
-20.8
-20.8
-20.8
-20.8
-20.8
-20.8
-20.8
-20.8
-20.9
-22.5
-22.5
-22.4
-22.5
-22.5
-22.5
-22.5
-22.5
-22.5
-22.5
-22.5
-25.5
-25.5
-25.5
-25.5
-17.7
-19.3
-22.4
-22.4
-22.5
-22.5
0.1
11.2
11.2
0
0
0
10.6
3.4
5.7
0
0
0.1
0
-5.7
-5.5
0
3.4
3.2
0.1
3.4
-5.5
-5.5
3.2
5.0
0
7.8
7.8
7.8
7.8
7.8
7.8
14.1
0
5.0
2.0
5.0
0
0
1.9
0
2.6
1.9
5.0
0
0
0
15.0
5.0
3.3
0
0
3.4
3.2
3.2
3.3
3.1
0
0
15.0
5.0
3.3
0
3.4
3.2
3.2
3.3
3.1
0
0
3.2
0
0
5.0
0
5.0
5.0
5.0
0
2.5
5.0
0
0
5.0
2.5
2.5
2.4
0
10.4
10.4
10.4
10.4
7.8
7.8
7.8
7.8
7.8
7.9
7.9
14.2
14.2
14.2
0
0
0
0
14.2
14.2
0
0
14.9
4.0
0
0
3.4
3.4
3.4
3.4
0
4.0
4.0
2.9
7.0
14.9
14.9
14.9
14.9
5.0
0
3.2
3.2
4.0
9.0
13.3
4.1
AC 8.2
4.1
4.0
3.9
0
12.7
0.1
0.8
0
0.1
12.6
4.0
13.3
13.4
13.4
9.0
3.2
6.7
6.3
6.3
0
0
0
0
0
0
4.0
5.0
15.0
15.0
-24.3 0 0 5.0
-24.3
3.3
3.3
1.1
0.8
0.8
0
3.4
0
7.0
4.0
7.8
7.97.8
8.4
8.4
8.4
8.4
8.4
A-3
B-1
1
2
VCR
L
R
L
R
SUBWOOFER
OUT
SYSTEM
CONNECTOR
VIDEO
OUT
DVD
AUDIO
INPUT
TV
TV
RS-232C
AUX
DIGITAL
INPUT
OPTICAL
ANALOG IN
DIGITAL IN
SUBWOOFER OUT
INPUT(1) INPUT(5)
INPUT(2)
INPUT(3)
INPUT(4)
2
1
15
7
11
14
12
13
1
2
5
11
9
10
7
3
6
8
8
5
6
1
4
14
15
5
10
2
14
1
89
6
3
2
5
3
4
11
4
10
3
OSD
FL DRIVER
IC26: TC4053BF
TRIPLE 2-CHANNEL MULTIPLEXER/DEMULTIPLEXER
X-COMMON
0X
1X
0Y
1Y
0Z
1Z
Z-COMMON
Y-COMMON
14
12
13
2
1
5
3
4
15
OUT c IN
OUT c IN
OUT c IN
OUT c IN
OUT c IN
OUT c IN
7
8
11
6
9
10
A
INH
C
B
16
VDD
VSS VEE
LOGIC LEVEL CONVERTER
IC39: TC74HCT08AF
Quad 2-Input And Gate
Vcc14
4B13
4A12
4Y11
3B10
3A9
3Y8
1A 1
1B 2
1Y 3
2A 4
2B 5
2Y 6
GND 7
–+
OUT1
–IN1
–VCC
+VCC
OUT2
1
2
3
4
5
+IN1 –IN2
+IN2
–+
6
7
8
IC27: µPC4570G2
Dual OP-Amp
IC40: BP5319F
DC / DC converter for LCDs
1 2 3 4 7 856 9
CO VOUT VREF GND VCTLGNDNC NC VIN
IC4: TC74HCU04AF
Hex Inverters
1A
1Y
2Y
VCC
6A
1
2
3
4
11
2A 6Y
5A
12
13
14
3A
3Y
5Y
4A
5
6
7
4Y8
9
10
GND
IC6: NJM79M05FA
Voltage Regulator
IC5: AN77L04
Low Dropout Voltage Regulator
IC3: LC74781-9798
On Screen Display Controller
CS
9
RST
23
VSS1
1
SIN
11
SCLK
10
OSCIN
6
OSCOUT
7
SYNIN
17
SEPC
18
SEPOUT
19
CHARA
8
VDD2
12
SEPIN
20
CTRL3
22
4
CTRL1
XtalIN XtalOUT BLANK CVIN CVOUTCTRL2
21 2 3 5 15 13
VDD1
24
Serial
parallel
converter
8-bits
latch
+
command
decoder
Horizontal
character
size
register
Horizontal
size
counter
Horizontal
display
position
register
Horizontal
dot
counter
Vertical
display
position
register
Vertical
dot
counter
Blinking
and inversion
control
register
Blinking
and inversion
control
circuit
Blinking
and inversion
control
register
Blinking
and inversion
control
register
Character
control
counter
Line
control
counter
Timing generator
Synchronisation
signal generator
Character output control
Background control
Video output control
Display
control
register
RAM
write
address
counter
Display
RAM
Vertical
character
size
register
Vertical
size
counter
Decoder
Font
RAM
Shift
register
Decoder
Horizontal
character
size
register
Horizontal
character
size
register
Horizontal
character
size
register
Horizontal
character
size
register
IC7: MD3221N
Voltage Regulator
COMMON
OUTPUT
INPUT
-
+
Error Amp.
Starter
Voltage
Reference
Input Short Circuit
Protection
Over Current
Protection
Over Current
Protection
Rush Current
Protection
Thermal
Protection
IN
1
GND
3
OUT
2