Read Sharp CD-BA250 (serv.man5) Service Manual online
– 19 –
CD-BA250H/CD-BA2600H
Figure 19 BLOCK DIAGRAM (1/3)
+5V
CNS4
BI4
CNP4
M3
T/T UP DOWN
LOADING
+3.3V
TO DISPLAY SECTION
TO MAIN SECTION
CONSTANT
VOLTAGE
Q2
LASER
DRIVER
+3.3V
Q1
+5V
PICK UP UNIT
IC1
LC78645E
CD SERVO
VVDD
LDD
LDS
M
SW3
DISC
NUMBER
SW2
CLAMP
SW1
OPEN/
CLOSE
CNP8
CNP7
TRACKING COIL
FOCUS COIL
SW4
PICKUP
IN
M2
SLED
MOTOR
M1
SPINDLE
MOTOR
M
M
R-CH
Q3
XVDD
RVDD
LVDD
ADAVDD
RFVDD
XL1
33.8688 MHz
OC. DISC NO
CLAMP SW
CD RES
CLK
DI
DO
CE
DRF
WRQ
+B6(+5V)
+B6(+5V)
DGND
L-CH
AGND
VCC3
VCC2
VCC4
VCC1
IC2
M63001FP
FOCUS/TRACKING/
SPIN/SLED
DRIVER
XIN
XOUT
RES
WRQ
DO
DI
CLK
CE
TIN2
TIN1
FIN2
FIN1
TD0
FD0
SPDO
SLDO
CONT5
CONT2
CONT3
CONT4
RCHO
RVSS
LVSS
LCHO
80
42
79
75
20
5
40
18
24
23
14
8
21
22
29
35
41
47
46
7
10
9
8
7
15
1
2
17 25
42
41
83
39
4
7
6
5
16
82
26 27
3
1
6
4
5
2
3
1
6
4
5
2
3
1
6
4
5
2
5
4
71
61
62
63
69
57
56
55
51
50
40
37
19
28
26
23
22
21
3
2
7
1
6
8
9
6
1
5
4
3
2
45
43 44
25
70
64
65
66
48
49
18
CD-BA250H/CD-BA2600H
– 20 –
Figure 20 BLOCK DIAGRAM (2/3)
FM OSC
AM LOOP
ANTENNA
ANTENNA
L341
BALUN
SO302
FM
ANTENNA
Q301
IC101
AN7345K
PLAYBACK AND RECORD
/PLAYBACK AMP.
JK690
VIDEO/AUX IN
R
L
R
L
FM
+B
+B4
CLK
+B4
AM IF
CNS601
ATT
–20 dB
Q101~
Q104
Q104
–B2
+B4
IC7
IX040
(2
IC561
IC562
KIA4558P
OPE AMP.
Q107
Q108
Q108
Q603
Q604
Q612
Q613
Q604
Q612
Q613
10.7 MHz
450 kHz
REC/PLAY
CLK
CE
DI
DO
DI
CE
MO/ST
SWITCHING
+B4
FM/AM
IC302
LC72131
PLL(TUNER)
OUT
FM/AM
L
R
BIAS
T1/T2
MUTING
P.B.
REC
AC BIAS
L
L
R
R
R
L
TAPE
TUNER
CD
PB
CNP7
FROM CD SECTION
HEAD
ERASE
SWITCHING
SWITCHING
SWITCHING
BIAS
Q113
Q114
Q112
Q110
SWITCHING
Q109
OSC
BIAS Q111
L103
Q105
Q106
Q106
REC PB HEAD
TAPE 2
PB HEAD
TAPE 1
R-CH
L-CH
R-CH
L-CH
IC601
LC75341
AUDIO PROCESSOR
+B4
R
L
REC
R
L
L NF
R NF
ALC
REF
R REC
L REC
POP REDUCE
R NF
L NF
SWITCHING
L(T2)
R(T2)
R(T1)
L(T1)
R
L
FM/AM
MPXIN
STEREO
AM RF IN
AM OSC IN
FM
Q360
VT
OSC
X352
4.5 MHz
AM BAND
COVERAGE
COVERAGE
AM TRACKING
T303
T306
X351
456 kHz
456 kHz
MO/ST
VCO
DET
FM
FM+B
GND
AM IF
CF351
FM/AM IF MPX.
IC303
LA1832S
FM IF DET./
FM MPX/
AM IF
AM MIX
CF352
T351
CF303
CF301
FE301
TA7358AP
FM FRONT END
24
22 21
4
3
2
6
8
5
7
1
21
7
8
4
1
22
3
4
24
2
1
8
18
17
3
9
10
18
11
16
3
15
10
9
7
23
14
12
13
1
2
20
21
19
7
18
10
8
17
13
4
5
2
24
23
6
9
16
14
12
15
1
5
14
3
4
21
7
9
8
5
17
6
2
1
20
22
11
17
16
15
13
14
12
15
16
23
4
7
H/N
P.B
REC
T1/T2
T1/T2
HIGH
NOR/
16 15 14 13
11 10 9
2 4
3
8
READY
MPXIN
VSSA
VDDA
XOUT
RDCC
RDDA
RST
VDDD
VSSD
XIN
XT21
4.332 MHz
ICT21
LC72723
RDS DECODER
L354
LOW PASS
FILTER
QT21 AMP.
– 21 –
CD-BA250H/CD-BA2600H
Figure 21 BLOCK DIAGRAM (3/3)
+B7
UNSW 5 V
UNSW 5 V
SW +5 V
+B5
D806
Q801
IC905
AN78L05
VOLTAGE REGULATOR
D802-805
PT802
SUB POWER
TRANSFORMER
PT801
MAIN POWER
TRANSFORMER
RL801
L801
LINE
LINE
FILTER
Q914
Q907
Q908
Q908
AC 230 V, 50 Hz
–VP
VF2
VF4
Q901
+B6
SW 5 V
IC904
KIA7805AP
CONSTANT VOLTAGE REGULATOR
+B4
+B3
+B1
–B1
-B2
+B6
+B3
+B7
-
-
+B4
-
-
Q701-Q703
R
L
+B5
RX701
REMOTE
SENSOR
SENSOR
4
IC701
IX0401AW
(2/2)
1
2
8P
MP.
D902~D905
D901
RY914
JK701
HEADPHONES
HEADPHONES
M901
FAN MOTOR
FAN MOTOR
M
Q906
Q709
Q902
Q903
Q905
Q904
Q903
Q905
Q904
Q603
Q604
Q612
Q613
Q604
Q612
Q613
IC903
KIA7810AP
VOLTAGE REGULATOR
IC902
KTC2026
IC901
STK4029S
POWER AMP.
F903
T2A L 250V
F904
T2A L 250V
F902
T4A L 250V
F901
T4A L 250V
+Vcc
–Vcc
L-OUT
R-OUT
CLK
MAIN
AC POWER
SUPPLY CORD
REC/PLAY
VLOAD
RESET
GROUND
+B7
+B7
+B7
+B7
+B5
VDD
VDD
VDD
SP. DET.
-
CE
DI
DO
XL700
4.194304 MHz
-
BIAS
T1/T2
AVDD
KEY
SW701-SW707
SW712-SW718
SW720-SW727
SW729-SW732
SW712-SW718
SW720-SW727
SW729-SW732
TO CD
SECTION
IC701
IX0401AW
SYSTEM
MICROCOMPUTER(1/2)
FL701
FL DISPLAY
42
43
44
46 45
47
31
23
89
80
44
33
78
49
48
47
13
93
16
14
92
90
1
2 4
5 6
7
15
1
29
28
9
67
6
1
3
2
3
2
1
7
1
13
7
8
10
100
33
31
11 12 13
9 10
15 16 17
20 21
23
22
24
79
64
54
52
53
51
48
49
40
39
36
35
34
T.F.
63
66 65
55
50
A+10 V
M+12 V