Sharp MD-M3 Service Manual page 51

C1204
0.047
R1208
220
TP1204
TP1202
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80
SYRS
1.48V
1
EFMMON
3.2V
2
AVCC
13 14 19
1 1.6V
3
EFMI
0V
4
AGND
1.36V
5 AIN
21
1.77V
6 EIN
1.6V
7
TCG
20
1.36V
8 BIN
1.77V
9 FIN
1.25V
10 VBAT 17
1.6V
11 WBI
3.17V
12 VDD1
IC1201
0V
13 DGND
LR376484
0V
14 TEST0 ATRAC ENCODER/DECODER
DIN
0V DIC IN : 1.58V
15 TEST1
OTHER : 0V
0V
16 TEST2
1.45V
17 X176KO
1.56V
18 FODRF
1.62V
19 FODRR
1.7V
20 TRDRF
1.5V
21 TRDRR
1.63V
22 SLDRF
1.53V
23 SLDRR
1.8V
24 SPDRF
1.4V
25 SPDRR
RAA3
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
10
TP1203
10 9 8 7 6 5 4 3 2
IC1202
IX2474AF
4M BIT D-RAM 11 12 13 14 15 16 17 18 19 20
A4
A5
A6
A7
A8
VREF3.2V
R1429
47K
89 88 87 86 85 84 83 82 81
XRST 80
0V
DIGCD 79
0V
DIGEX 78
2V
0V
.1V
77 ( )
DFS1
3.2V
DFS0 76 ( )
3.2V
NC DAPON 75
0V
SBSY 74
0V
73
A/B
3.1V LDON
72
LDON
A/B
TP1411
97A : 0V NC PCNT1 71 0V
97B : 3.2V 3.1V
PCNT0 70
R1444
NC 69 D1401
01 0V
100
0AW SB00703Q
NC 68 0V
TP1412
STEM 3.2V
67
L3CLK
MPUTER
3.2V TP1413
L3MODE 66
TP1414
3.2V
65
L3DATA
C1410
0V
64
GND
1
0V
NC
63
3.2V
62
VCC
3.2V R1426 1K
EEPK 61
0V R1427 1K
TP1415
EEPD 60
3.2V
EPCS 59
0V R1428
EEPRO 58 ( )
1K
NC
57 0V
Q1801
NC
56 0V
2SA1162 G
NC
55 0V
3.18V
0V
SYSD0 54
0V
5V
SYSD1 53
0V R1801
SYSD2 52
270
0V
SYSD3 51
TP1410 Q1800
SYSD4
RNC1407
42 43 44 45 46 47 48 49 50 3
2
0V
1
Q1802
RNC1407 2
0V 1
3
R1420
10K
IC1402
0V
S29294A
EEPROM
3.2V
DI
5 SK 4
0V 3.2V R1425
6 DATA CS 3
100K
3.2V
0V
7 GND VCC 2
0V
C1409
8 PRTCT NC 1
0.1
0V
• The numbers 1 to 24 are waveform numbers shown in page 55 and 56.
7
Circuitry parts in ( ) are not mounted.
TP1215
TP1218
6 9
TP1217
Waveforms should be measured by inserting the circuit,
TP1216
as shown in the figre.
6
7
100K
TP1213
9
79 78 77 76
TP1212
18
1.55V
75
1V
74
DADATA
0V
ADDATA 73
1.5V R1211
DFCK
72
220
1.55V
BCLK
71
1.5V
LRCK
70
C1206
0V 23
DGND 69
0.0012
3.17V
VDD3
68
1.58V
DOUT
67
DIN
66
1.3V
XO 65
22
1.3V
XI 64
R1215
0V C1207
DGND 63
1M
1
3.17V
VDD1 62
0V C1208
XL1201
VPD 61
12P
33.8688MHz
3.17V NC
VXI 60
(CH)
3.2V
CDBCLK 59
3.2V
R1214
CDLRCK 58
10K
3.2V
CDDATA 57
R1221
0V
TEST4 56 TP1211
10K
0V
TEST3 55 ( )
58V
TESO1 54
0V R1219
NC
EXPORT1 53
10K
0V TP1214
NC
EXPORT0
52
58V
X700KO NC
51
MD-M1 ONLY
EFMO
PLAY:0V
REC:1.5V
TP1210 REF
1
PD
2
8
VDDA
3
AMPI
4
AMPO
5
VSSA
6
XI
7
R1210 NC
8
220
1
Vcc
1 14
2 13
3 12
4 11
5 10
6 9
GND
7 8
C1750
820P
TP1700
C1705
0.1
C1706
0.01
C1700
47/4
C1701 L1700 L1701
10µH 10µH
47/4
TP1701
IC1702
AA.GND
NJM431U
R1702 REGULATOR
R1701
1K
30K
2.46V
1
C1702
R1703
0.001
3.3K
AA.GND
AA.GND
Q1804
2SA1314 C
VREF3.2V 3.2V
4.8V
3.3V
R1807
27K
TP1800
3.2V
4 3
C1800 C1801
5V
2
10
220/4
0V
5 1
0V
IC1801
XC62EP32
REGURATOR
RNC1404
TP1801
( )
5V 5V
R1802
220K
Q1805
R1803
2SA1314 C
100K
PCNT0 3.1V 3 2
0V
Q1803
RN1406 1
8 9
Figure 51 SCHEMATIC DIAGRAM (14/14)
Connect an oscilloscope
270P
CD SIGNAL
MD SIGNAL
DADATA RECORD SIGNAL
ADDATA
DFCK
BCLK
LRCK
R1212
47
C1210
22P
(CH)
TP1900
TP1901
1 Vcc 1 Vcc 5
5
2 2
GND 3 GND 4
3 4
VDD
16
LOCK
15
S2
14
S1
13
M2
12
M1
11
CKO
10
VSS
9
R1713
24
100K
C1709
0.01
28 27 26 25 24 23 22 21 20 19 18 17 16 15
IC1701
UDA1344
AD/DA CONVERTER
1 2 3 4 5 6 7 8 9 10 11 12 13 14
C1708
0.01
L3CLK
L3MODE
R1709
R1705
39K
39K
R1710
C1716
R1706
680K
47/4
1M
Q1700
2SC2412 KR
3.2V
5.4V
3
3.85V
2
0V
R1519 120
LRCK
( )
BCLK
( )
DADATA
( )
ADDATA
( )
DFCK
( )
( )
TP1702
5.4V 5.4V
R1711 R1712
12
Q1702 4.8V 12
2SA1162 G
R1707 R1708
1K 27K
3 0.7V
3.1V 2
1
Q1701
PDOWN
C1804
2.2
P.GND
2 3
Q1806
0V
RN1406
1
( )
( )
( )
( )
C1500
330P(CH)
10
– 51 –
MD-M3/M1
P39 12-D
MAIN PWB
CNP13
CNS13
1 2 3 4
CNW2002
1 2 3 4
R1533
56
R1545
56
R1535
Z2134SC
BACK UP
MD-M1 ONLY
C1508
0.047
R1514
1K
TP1514
TP1515
TP1516
Q1500
RNC1407
TP1517
TP1518
3.18V 0.1V
RESET 3
2
TP1519
R1525 3.3K
0V
TP1500 1
STID R1526 1K
TP1501
DSCK R1527 8.2K
TP1502
SERCH R1528 8.2K
TP1503
KDATA R1529 8.2K
TP1504
MDDATA R1530 220
TP1505
DSTB R1531 220
LOADIN
( )
D.GND
C1503
( )
0.33
L1501
R1536
1µH R1532
Z2134SC
1K
L1503
4.7µH
R1515 1.8K
R1516 1.8K
R1512 47
R1513 47
C1511
R1511
R1510
22P
8.2K
8.2K
(CH)
C1506
C1505
100P(CH)
100P(CH)
11
MD-M3 ONLY
CN1502
LRSY
1
DATACK
2
GND
3
DATA
4
C1512
270P
(CH)
1 DIGOUT
2 GND
3 DIGIN
4 BACKUP
5 PDOWN
6 RESET
7 MD-ST
8 DSCK
9 SERCH
10 KDATA
11 MDDATA
12
DSTB
13
D.GND
TP1508
14
D.GND
TP1509
15
D.GND
16 D.GND
TP1510
17 DVDD
TP1511
18 DVDD
TP1512
19 PSWCK
TP1513
20 LOAD SW
TP1520
21 AVCC
TP1506
22 L IN
TP1521
23 AA.GND
TP1507
24 R IN
TP1522
25 AD.GND
TP1523
26 L OUT
TP1524
27 AA.GND
TP1525
28 R OUT
CN1501
12