Service manual
MD-MS722H/MS721H
– 30 –
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• NOTES ON SCHEMATIC DIAGRAM can be found on page 35.
Figure 30 SCHEMATIC DIAGRAM (3/4)
P28
P29 P30
F800
1.00A,
63VDC
!
MS722H
ONLY
L702
L703
L704
L714
L713
L712
L456
L452
L454
L453
L457
L458
L711
C451
0.001
C803
0.1
C802
1
R807
100K
TP809
R808
1M
C808
0.1/16
R818
180K
R819
180K
R847
330K
R846
330K
R769 39K
R770
39K
R814
1K
C200
1
IC200
62FP2002
2V REGULATOR
3
2
1
C511
1
D800
1SS368
R802
4.7K
R810
6.8K
R809
2.2K
C813
0.1
R813
100K
IC842
7WH123FU
C-MOS LOGIC
8
7
6
5
4
3
2
1
C842
1
R893
1K
Q892
2SA17457
C481
0.1
TP484
TP485
TP483
TP482
TP481
TP772
TP771
TP414
TP466
TP467
TP468
R454
56K
R453
18K
R452
8.2K
R451
5.6K
R459
47K
R460
47K
R458
56K
R457
18K
R456
8.2K
R455
5.6K
R892
56
R891
2.2K
TP465
Q830
DTC144 TE
R830
100K
IC802
NDH8304P
8
7
6
5
4
3
2
1
D801
SB10015C
R844
100K
R831
180K
R832
220K
R843
100K
Q841
DTA144 TE
C837
0.1
C836
0.1
D836
1SS372
XC62HS02
POWER SUPPLY
MICROCOMPUTER
5
4
3
2
1
C830
1
C827
100P (CH)
C828
100P (CH)
IC820
IR3M09N
POWER DRIVE
9
8
7
12
11
10
6
5
4
3
2
1
R829
15K
C826
100/6.3
C825
3.3/10
D821
F10J2E
L821
10 (CH)
IC821
CPH3303
C822
8P
R823
100K
R821
680K
R822
3.3M
C821
68P (CH)
C855
100P(CH)
R860
33K
R858
100K
C859
0.001
R859
15K
C858
100P(CH)
R851
10K
C831
1
100K
R852
C851
68P
(CH)
IC850
IR3M09N
POWER DRIVE
10
11
12
9
8
7
6
5
4
3
2
1
R855
270K
C752
0.082
R763
82
C765
0.22
R767
1K
R764
82
C766
0.22
R768
1K
L752
47µH
L751
47µH
TP726
TP725
TP724
TP723
TP722
TP721
TP728
TP727
TP729
D493
015Z5.1Y
D491
015Z5.1Y
C491
0.1/16
D494
15AZ7.5Y
D492
15AZ7.5Y
L491
4.7µH
R492
1K
C751
0.082
R765
27
R766
27
IC202
X
2723AF
TP808
TP812
TP811
TP810
L710
0.47µH
TP804
R806
300K
C807
0.01
R805
680K
TP803
+B
TP801
IC801
HN1C03FU
CONSTANT
CURRENT DRIVE
6
5
4 3
2
1
015Z5.1Y
D802
R816
24K
C801
0.1
R804
680
TP805
R815
56K
R800
560
R801
2.2K
R803
27K
C800
1
C714
1
R714
10K
R753
120K
C721
3.3/10
C723
0.001
C735
0.001
C736
100
C724
0.001
TP712
TP713
TP711
J702
MIC IN
4
3
2
1
TP714
R723
6.8K
R724
6.8K
R713
10K
Q711
RN1444 A
R717
1K
C712
100P(CH)
C713
1
C715
0.1
TP703
TP705
TP708
TP701
TP709
IC701
IR3R54N
AUDIO AMP.
C703
0.01
R703
120K
C758
3.3/10
C755
0.01
C753
1
C702
10/6.3
R756
27K
C761
1
C762
1
R701
100
C756
0.68
R762
3.6K
R761
3.6K
R754
270K
R757
27K
C757
0.68
IC703
IR3R54N
AUDIO AMP.
C701
10/6.3
R702
100
C510
2.2
C509
2.2
R502
470
R501
470
C502
0.0022
C501
0.0022
C504
3.3/10
C503
3.3/10
TP500
L500
22µH
C508
1
C500
10/6.3
IC501
AK4519VF
AD/DA
CONVERTER
C722
3.3/10
C760
0.027
TP704
TP702
TP707
R715
100K
R716
100K
C734
0.1/16
C733
0.1/16
C754
1
R729
2.7K
R730
2.7K
C759
0.027
TP807
L851
4.7µH
IC851
CPH3403
C856
1/16
C854
0.01
R857
100K
D851
RB521S30
D852
F1J2F
C857
10(CH)
L852
10µH
C853
10P
R853
330K
R854
0.2M
D861
F10J2E
L861
4.7µH
C861
1/16
C862
1/16
C864
47/6.3
C869
47/6.3
L862
47µH
C868
1
C772
47/6.3
C771
47/6.3
L771
47µH
L871
0.47µH
C872
10
Q891
2SA17457
R871
18
D871
RB521S30
IC871
TK71345M
4.5V REGULATOR
(ON/OFF)
5
4 3
2
1
C871
1
R872
100K
C806
3.3/10
C805
100/6.3
C804
1
C841
22/6.3
TP463
TP462
TP459
TP458
TP457
TP456
TP455
TP464
TP454
TP461
TP451
TP452
TP453
24
23
22
21201918
17
1615
14
13
10
11
12
9
8
7
6
5
4 3 2 1
12
11
10
131415
16171819
20
21
22
2324
9
8
7
6
5
4 3 2 1
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
CN451
7
6
5
4
3
2
1
CN482
24
23
222120
17
16
191815
1413
10
1112
9
8
7
6
5
4 3 2 1
J701
OPTICAL
/LINE IN
9
8
7
5
4
3
2
1
C726
3.3/10
Q721
2SC4213 B
R725
100
C725
3.3/10
J703
REMOTE
CONTROL
HEADPHONES
8
7
6
5
4
3
2
1
J801
DC IN
3
2
1
C833
0.33
R481
36K
R482
18K
C711
100P
(CH)
C727
1
R726
39K
R728
1K
C731
0.22
R727
8.2K
IC771
TK71225M
5
4 3
2
1
TP802
R72
8.2K
R712
5.6K
R719
8.2K
R711
5.6K
C773
0.22
C774
1
C775
0.01
C507
10/6.3
R500
4.7
C506
0.001
C505
0.001
Q842
DTA114YE
R849
180K
R845
330K
RKEY
RPLAY
RDATA
VCC1
INPGCK
OSCOUT
OSCIN
EAIN+
DB
EAIN-
VREF
OSC
ROSC
PWM
VCC
OUTGND
EAOUT
EAOUT
GND
OUT
VCC
PWM
STATE
ROSC
OSC
VREF
EAIN-
DB
EAIN+
OSCIN
OSCOUT
RI
LI
LI
RI
L-ch
R-ch
KEY
PLAY
LCD
LCD
DRIVER
1
7
1
KEY FLEXIBLE PWB UNIT
FLEXIBLE
PWB
FLEXIBLE
PWB
DISPLAY
VOL DOWN
REC
EDIT
P-MODE
JOG 1
JOG 2
GND
BASS
ENTER
STOP
SKIP DOWN
SKIP UP
PLAY
VOL UP
CHARACTER
VCC
EMPH1
BCLK
DIN
OPTCNT
ADPON
DAPON
DFCK
LRCK
ADDATA
DADATA
L
R
BATTERY
TERMINAL
HSTOP
HPLAY
HKEY1
JOG0
JOG1
HKEY2
HREC
DSPSTB
DSPSCK
DSPDAT
VCC
Vout
GND
GND
INPGIN
MCPGIN
DGND
SDTI
VD
CMODE
DEM1
DEM0
AOUTL
AGND
VCOM
AOUTR
VB
VA
VRAD
VRDA
VCMR
AINR
AINL
VCML
MCLK
LRCK
SCLK
SDTO
PWAD
PWDA
PBMUTE
RCAULT
RESET
BEEP
PBAULT
AUDATA
AUSCLK
R-CH
L-CH
ELLVL
ELON
T
T
STATE
R
P
HPLAY
HREC
INN
DRY
START
PHOLD
DCI
PCNT1
PCNT2
L-CH
R-CH
LOUT
LIHP
AGND
RIHP
ROUT
DGND
VEE
VCC
3
1
2
EMPH0
3
1
2
EXT.BATTERY
TERMINAL
1
2
3
ROUT
RIHP
LOUT
LIHP
AGND
DGND
VEE
VCC
18
2.5V REGULATOR
POWER SELECT
CHARGE DRIVE
RPLAY
3
1
2
RCPCNT2
R848
1M
R811
330K
R812
180K
D843
1SS361
D842
1SS361
R841
470K
D841
1SS361
R842
1K
RDATA
R824
390K
R826
220K
+B
IC841
+B
+B
+B
+B
+B
+B
+B
+B