Sharp MD-M3 Service Manual page 50

MD-M3/M1
MD MAIN PWB-D
A
C1120
0.01
TO CHASSIS GND
B
C
R1101
1
C1100
4.7
D
28 27 26 25 24 23 22 21 20 19 18 1 7 16 15 1 4 13 12 11 10 9
FLEXIBLE
PWB
28 27 26 25 24 23 22 21 20 19 18 16 15 14 13 12 11 10
17
LDOUT VCC
1 8
EXTC DGND
2 7
APC LDON
3 6
E
LW LDVAR
4 5
MD PICKUP UNIT
SW1952
WRITE
PRO
R1902
1.8K
DISC
MEDIA
R1901
470
SW1953
LEAD IN
F
SW1954
PLAY
R1904
820
SW1955
RECORD
SW1956
LOADING
MD MECHANISM SWITCH PWB-E
+
M902
M
–
SLED
G
MOTOR
M901 +
M
SPINDLE –
MOTOR
M903 +
M
LOADING
–
MOTOR
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 26.
1
TP1124
C1105
( )
C1104
0.0033
0.033
48 47 46 45 44 43 42 41 40
RF2
0.7V
1
R
RF1
EFM
0.7V
2
AGC
&
RF4
0.7V DIFF
SW
3
RF3
0.7V
DIFF
4
C1101
IC1101
1 1.6V
REFI ADIP
IR3R55
5
AGC
C1102
RF SERVO/SIGNAL
1 1.6V
PROCESSOR
6
REFO
0.7V
RFADD
7
BIAS LPF HPF
C1103
0.027
TCGI
8
R1103 1.6V
390K
AIN
9
1.6V
BIN
10
1.6V
EIN
LOGIC
11
1.6V
Low reflection : 0V
FIN
High reflection : 3.2V
12
1.6V
13 14 15 16 17 18 19 20 21
TP1116 C1106
1
L1100
0.47µH
R/P
R1105
1.2K
3
12
2
CN1101
8 7 6 5 4 3 2 1
9 6 4 3
8 7 5 2 1
MAGNET HEAD
(RECORD)
Q1302
1 1
2SK2909
2 2
D
Q1300
G 2.6V
2SK2909
D
C1302
2.6V
S
10
G
S
1.4V
D D
G
G
2.6V
S
S Q1301
Q1303
2SK1473
2SK1473
TP1400
LEAD IN
LEAD IN
1 1
TP1401
HINF
HINF
2 2
GND GND
3 3
TP1402 TO CHASSIS GND
LOADING
LOADING
4 4
TP1403
MINF
MINF
5 5
CN1401
C1400
C1401
0.022
0.022
15
C1619
330P
(CH)
TP1600
SLD+
1 1
SLD-
2 2
16
CN1602
TP1601
TP1602
TRDRR
SP+
TRDRF R1601
1
1
6.8K
2
2
SP- FODRR
CN1603 FODRF
TP1603
TP1604
TRY+
1 1
2
2
TRY-
CN1604
2 3
Figure 50 SCHEMATIC DIAGRAM (13/14)
TP1131
TP1125
C1110
0.0047
C1111
0.47
39 38 37
R1106
56K
1.6V
TP1132
36
ADIPI
1.6V
TP1133
35
C1112
ADIPO
330P
34 4
0V (CH)
NC
ADLPFO
1.6V
33
TP1134
22KO 1.6V
32
5
TP1135
22KI
31
1.6V
R1107
560
WBO 1.6V
30
TP1126
R1108
22K
TCGO 1.6V
29
TP1127
R1109
22K
AOUT 1.36V
28
TP1128 R1110
22K
BOUT
1.35V
27
TP1129
R1111
22K
EOUT
1.78V
26
TP1130 R1112
22K
FOUT 1.78V
25
22 23 24
C1119
1
R1612 R1614
200K 100K
L1300
47µH
R1304
680 TP1302
EFMO
R1404
1K
HDON
LEAD IN
HINF
C1304
NC
10
MINF
L1301
TP1606
47µH
C1606 C1608
10
100/10
INNSW
IC1601
BA5984FP
MOTOR DRIVER
F+
2.2V 2.3V SLP
FP
14
15 +
+ +
2.2V 2.1V SLN
FN F-
16 13
2.2V SPP
TP T+ 2.1V
17 12
+ + +
2.2V 2.1V SPN
TN T-
18 11
0V 0V
19 10
0V
1.6V
20 9
5V
C1607
21 8
1
3.2V
C1611
C1602
30 29
- - 0.0082
820P
1.6V 1.6V
7
22
1.6V SPDRR 1.6V R1616
23 6
- - 6.8K
1.6V - - SPDRF 1.6V
+ +
24 5
1.6V
1.6V
25 4
SLDRR C1615
1.6V 1.6V
26 3
- -
SLDRF 0.0015
1.6V
+ +
27 2
1.6V
0V
28 1
0V
C1603 R1618
820P
15K
4
– 50 –
1
EFMO-I
AOUT-IN
EOUT-IN
TCG
BOUT-IN
FOUT-IN
WBO-I
TP1200
R1223
100
FODRF
FODRR
TRDRF
TRDRR
SLDRF
SLDRR
SPDRF
SPDRR
TP1136
R/P
R1414
1K
R1413
C1407
1K
0.047
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82
NC
0V 1
0V
2 SBCK
0.2V
3
LDVAR
4
R1408 ADJS NC 3.2V
3.3K 0V SFSY
5
0V
6
LOAD IN
7 ERROR 3.1V
0V
8 BYTE
0V
9
CNVSS
0V
10 STID OUT
0V
11 SEACH OUT
12
C1404 RESET 3.18V
0.022 13 NC 1.44V
0V
14
VSS
1.5V
15
MCCK
16 3.2V
VCC
17 3.2V
3.1V
18
DINT
LOADIN
19
DSENSE
0V
20
ST-ID
0V
21
SERCH
0V
22 MDRSW
3.15V
( ) 23 NC
FSW 3.2V
24
VARI-P SW
0V
25 P-DOWN 3.2V
R1410
26
3.2V
HDON
3.3K
LD+
27
LD+
LD- 0V
28 LD-
0V
29 CIN
2V
30 INNER
R1409 3.2V
DATA
1K
31 32 33 34 35 36
R/P
C1411
330P
(CH)
Q1401
3.2V
1
RNC1404
VREF
3.2V
2 3 2
0V
1
Q1402
2 3 2 3
RN2404
3.15V
0V 2.1V
1
0V
Q1403
RN2404
Q1400
RNC1404
TP1607
L1600
1µH
5
TP1202
100 99 98
SYRS
TP1201
1.48V
1
EFMMON
3.2V
2
AVCC
C1201
1.6V
3 EFMI
10
0V
4 AGND
1.36V
5 AIN
1.77V
6 EIN
1.6V
7 TCG
1.36V
8 BIN
1.77V
9 FIN
1.25V
10 VBAT
1.6V
11 WBI
C1200
3.17V
12 VDD1
1
0V
13 DGND
0V
14
TEST0
0V
15
TEST1
0V
16
TEST2
1.45V
17 X176KO
R1200 120K 1.56V
FODRF
18
R1201 120K 1.62V
19 FODRR
R1202 150K 1.7V
20 TRDRF
R1203 150K 1.5V
TRDRR
21
R1204 62K 1.63V
22 SLDRF
R1205 62K
1.53V
23 SLDRR
R1206 33K 1.8V
24 SPDRF
R1207 33K 1.4V
25 SPDRR
RAA3
26 27 28
11
10
MINF
Low reflection : 2.2V
High reflection : 0.1V
NC
D
A/B
97A : 0V NC
97B : 3.2V
IC1401
IX0290AW
MD SYSTEM
MICROCOMPUTER
R/P
PLAY : 3.15V
REC : 0V
37 38 39 40 41 42 43 44 45 46 47 48 49
R1420
10K
IC140
0V
S29294
2.3V
3
EEPRO
DI
1 5 S
0V
0V
6
DATA C
0V
7 GND VC
0V
N
8 PRTCT
6