Sharp MD-MT821(GL) Service Manual page 32

MD-MT821/W
P30
P31 P32
A
DADATA
ADDATA
DFCK
BCLK
LRCK
DIN
ADPON
DAPON
OPTCNT
Serrial 903xxxxx
Serrial 904xxxxx~
EMPH1
GND 24
I/O4 23
B
I/O3 22
CAS 21
OE 20
A9 19
A8 18
A7 17
A6 16
A5 15
A4 14
GND 13
202
D-RAM
C202
7/6.3
C
C2R5V
D
VCC 5
4
IC404
1G00DC
ND GATE
SW401
EJECT
4
3 NC
2 NC
1
TP406
R405
TP405
10K
+B
E
SE
15
LDVAR
TEMP
HKEY2
HKEY1
INN
DCI
DRY
F
DINT
C200
1
G
H
• The numbers 1 to
• NOTES ON SCHEMATIC DIAGRAM can be found on page 28.
1
HREC
HSTOP
HPLAY
HKEY2
HKEY1
R451 R452 R453
5.6K 8.2K 18K
R482
33K
+B DSPSTB
DSPSCK
DSPDAT
6 7
8
+2.7V
12 11 10 9 8 7 6 5 4 3 2 1
1 3 1 4 1 5 1 6 1 7 1 8 1 9
C507 R500
4.7
10/6.3
C774
1
4
5
C773
0.22
TK71225M
+B
2.5V
C206
1
1
3
2 L771
100 H
IC203
62FP2002
2V
REGULATOR
L862
100 H
D852
U1FWJ44N
L852
10 H
C857
10
R853
300K
R855
300K
12 11 10 9
Buf
–
+
DELAY
13
14 15 16
IC200
62FP2002
POWER DRIVE
1
+2.7V
3
2
18 are waveform numbers shown in page 37.
2
Figure 32 SCHEMATIC DIAGRAM (3/4)
KEY SWITCH
FLEXIBLE PWB ASS'Y
TP451
1 1
TP452
2 2
TP453
3 3
TP454
4 4
TP455
5 5
TP456
6 6
TP457
7 7
TP458
8 8
TP459
9
9
TP461
10 10
R455 R456 R457 R458 TP462
11 11
5.6K 8.2K 18K 56K
TP463
12 12
13 13
TP486
7 7
6 6
TP485
R481
5 5
33K
C481 TP484
4 4
0.1
TP483
3 3
TP482
2 2
TP481
1 1
CN482
R501
C509 R720
2.2
470 8.2K
R719
C510
8.2K
2.2
R502
470
12 11 10 9 8
C511
DGND
1
13 14 15 16 17
2 0 2 1 2 2 2 3 2 4
C762
2.2
C761
2.2
R754
270K
3
C775
2
0.01
1
IC771
12 11 10
REGULATOR
TP771
13 14 15
C754
1
TP772
C872
C869
10/10
47/6.3
L871
0.47 H
IC871
TK71345M
4.5V REGULATOR
(ON/OFF)
C861 4
D861
F10J2E 1
5
C856
L851
C836
1 4.7 H
0.1
C854
0.01
C871
R857
1
100K
IC851
C837
NDS331N
0.1
POWER DRIVE
R851
10K
8 7 6 5 4 3 2 1
Buf
DELAY
–
+
RDB OSC
+
–
OSC
OSCPLS OSCI
–
+
+ VREF
LVS
Buf
–
C855
180P
18 22 24
17 19 20 21 23
(CH)
C821
56P
(CH)
C831
1
R823
100K
R826
220K
C822
10P
(CH)
L821
IC821
22 H
NDS332P
POWER DRIVE
3 4
– 32 –
LCD ASS'Y
EDIT
DISPLAY
SKIP DOWN
SKIP UP
REC
MODE
STOP
VOLUME DOWN
PLAY
BASS
VOLUME UP
ENTER
LCD
GND
*
LCD
MD-MT821
DRIVER
MD-MT821W
R717
1K
R712
5.6K
L710
R711
5.6K 47
C733
0.1
Q711
7 6 5 4 3 2 1 RN1444 A
RI LI
L-CH
R-CH
INPGCK
R715
IC701
100K
NC NC
20 21 23
18 19 22 24 IR3R54N
C701
INPGIN R716 R714
AUDIO AMP
10/6.3
100K 10K
C714
1
R762
MCPGIN
4.3K
R728
1K
R761
R729
4.3K
2.7K
C721
3.3/10
R730
2.7K
C722
3.3/10
9 8 7 6 5 4 3 2 1 C738
RI LI NC
DGND
VCC
VEE
16 18 19 20 21 22 23 24
17
C755
0.01
L751 R765
10 H
*
L752 C765
R766
10 H
0.33
*
R763
R764
68
68
R892
82
D431
1SS361
C431
5 4
3
0.47
2
R431
1
330K 1 2 3 R893
1K
R872
100K
R891
1K
R815
TP807
56K
VCC1
R816
C800
24K 1
R810
5.6K
6 5 4
1
2
3
1 2 3
D801
SB10015C R802 D803
1K 1SS400
F800
T1A L C805
100/6.3
25VDC
IC841
!
XC66DS01
1 5
2
3 4
C842
RESET 2.35V
1
REGULATOR
R831
Q841
180K
R811
RN1104
100K
D841
RB731U
3
2
1
5
R765,766
8.2
18
J701
OPTICAL/
C715
LINE IN
0.1
TP707
7
VCC
TP709
9
Vout
TP708
8
GND
R713
C713
6
10K NC
1
TP701
1
L702 TP702 L
2
L703 TP703 R
3
C712 C711
TP704 GND
100P 4
100P
L704 TP705
(CH)
(CH) 5
R725
100
Q721
2SC4213 B
R726
39K
J702
MIC IN
L714 TP714
4
L713 TP713
L-CH
2
L712 TP712
R-CH
3
TP711
1
C724
0.001
L711
L456
TP726
6
TP725
5
TP729
L452 TP722
2
L454
L-CH TP724
4
TP723
R-DH
3
L453
TP721
1
L457
RDATA TP727
7
TP728
8
L458
J703
REMOTE CONTROL/
HEAD-PHONES
J801
DC JACK
TP805 TP801
1
R809
NC
2
2.2K
TP802
D800
3
1SS360
6
5
4
TP803
TERMINAL,
R805
BATTERY+
680K
R806
300K
TERMINAL,
BATTERY–
TP804
TP810
R807
TP811
100K
R808
1M
EXTENSION
TP812
BATTERY
TERMINAL
4
5
6
6