Pickup Unit - Sharp QT-CD121 Service Manual

R871
C850
4.7K
50 49
0.1
C845
4.7/50
NC
48
47
TBC
FSC 46
GND 45
SLI 44
R838
C834
33K
0.033
C833 R836
R837
0.001 47K
47K
R833
SLC
43
5.6K
42
RFS–
C830 C832
R834
2P R832 27P
1K
(CH)
(CH)
56K
RFSM 41
C831
R835 0.0027
CV+ 40
470
CV– 39
SLOF
38
HFL
37
TES
36
C822
TOFF 35
220P
34
33
30 31 32
R810 D802
82K 1N4148
C851
0.022
C821
1/50
+B
GE PIN
NO. VOLTAGE
45 2V
46 0V
47 0.1V
48
2.2V
49 0V
50 2.5V
51 0V
52 2.5V
53 0V
54 0V
55 0V
56
4.1V
57
4.1V
58 5V
59 0V
60
2.7V
61
2.4V
62 0V
63 0V
64
0V
6 5 4 3 2 1
P12 1 - E
TO MAIN SECTION
• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.
7
+B
R860
C847
1K
+B 0.01
64 63 62 61 60 59 58
1
R858 C841
2
680 0.047
1
3 DEFI
PDO
2
TAI
C842
4
VVss
0.047
5 ISET
IC802
R857
27K
6 VVDD
LC78623D
7 FR
R856
1.2K
Vss
8 SERVO/SIGNAL CONTROL
9 EMFO
10 EMFIN
TEST2
11
15 HFL
12 CLV+
16
TES
13 CLV–
14 V/P–
15
16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
+B
+B
+B
3.5V
1 VO1-
+B
3.5V
2 VO1+
2.5V
3 VIN1
4 VIN1'
0V
5
NC
0V
6 NC
C846
0V
7 MUTE
330/10
29
GND
0V
8
VIN2'
2.5V
9
VIN2
2.5V
10
VO2+
+3.8V
Q804
R877
11
S8050D
220
4.8V
7.4V
VO2-
-3.2V
+B
12
GND
R878
0V
5.5V 13
100
14 OP OUT
C889
10/16
ZD801
MTZJ5.6B
C887
L802
0.022
0.68µH
8 9
Figure 11 SCHEMATIC DIAGRAM (2/4)
+B
F
E
B
A
K
+B
R801
1K
C801
0.01
+B
57 56 55 54 53 52 51 50 49
48
47
XL801
48 EFLG XVSS
16.93MHz
46
SBSY
47 XIN
45
XOUT 44
+B
XVDD 43
42
MUTER
+B C868
R874
RVDD 41 10/16
100
RCHO 40
39
RVSS
C867
38
LVSS
10/16
34 NC
37
LCHO
33 TEST4
R873
36 100
LVDD
C890
35
MUTEL
100/10
34
33
R880
100
L801
C843 C873
0.82µH 100/10 0.01
0V
GND 28
3.5V
VO4–
27
3.5V
VO4+ 26
2.5V
25
VIN4
VIN4' 24
2.5V
BIAS IN 23
+B
7.4V
VCC
22
30
+B
VCC 21
7.4V
VIN3' 20
2.7V
19
VIN3
3.8V
18
VO3+
3.2V
VO3– 17
OP IN +
16
OP IN -
15
+B
10
– 11 –
LD
PD
VR
K
5 5
5
E
4 4 4
A
3 3 3
B
2 2 2
F
1 1 1
TR–
1 1 1
TR+
2 2 2
FO+
3 3 3
FO–
4 4 4
GND
5 5 5
PD
6 6 6
VR
7 7 7
LD
8 8 8

PICKUP UNIT

C870
0.0022
C869
0.0022
TR+
TR–
FO–
FO+
SP+
6 6 6
SP–
5 5 5
SL+
4 4 4
SL–
3 3 3
PU-IN
2 2 2
1 1 1
CD MOTOR PWB-B
11
QT-CD121
LD
1
MON
K
E
A
B
F
C
TR+
FO+
FO–
TR+
FO+
FO–
TR–
TR–
M701
M
SPINDLE
MOTOR
M M702
SLED
MOTOR
SW702
PICKUP IN
12