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MD-MT877/MD-MT877C
7
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Figure 31 SCHEMATIC DIAGRAM (2/2)
+
2.7V
–2.7V
+4.5V
+1.5V
+2.7V
+2.7V
+2.7V
–2.7V
+4.5V
LCD/KEY PWB-B
EXTENSION
TERMINAL,+
GND
TERMINAL,–
BATTERY
TERMINAL,+
EXTENSION
TERMINAL,+
BATTERY
TERMINAL,–
CONTROL
TERMINAL
5
6
7
8
EO
GND
VCC
ROSC
OSC
EIN
EIP
BY
OUT
BUF
S
Q R
RSFF
CMP
CTRL
VREF
ERRAMP
STAND
VCC2R5V
10
11
12
15
14
13
18
17
16
21
20
19
24
23
22
VCC
A10
VCC
A3
A2
A1
A0
RAS
WE
I/O2
I/O1
GND
I/O4
I/O3
CAS
OE
A9
GND
A8
A7
A6
A5
A4
9
8
7
6
5
4
3
2
1
TP401
TP405
STOP
ELON
DCON
PCNT3
EMPH0
PCNT2
PBAULT
DCNT1
HREC
XRT
BATON
(OG)
(GREEN)
(BLUE)
TP411A
8
4
09
TP411
TP407
TP410
8
7
6
5
4
3
2
1
TP413
OPEN
HPLAY
STOP
HREC
VCCMICOM
5
43
2
1
DADATA
ADDATA
BCLK
LRCK
DFCK
ADPON
DAPON
OPTCNT
DIN
EMPH1
16
15
14
13
12
11
10
9
8
7
6
5
4 3 2 1
AINR
AINL
LRCK
SCLK
SDTI
SDTO
MCLK
DEM0
DEM1
VDD
VSS
PWDA
PWAD
AOUTL
AOUTR
VCOM
5
4 3
2
1
VCC
GND
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
EO
GND
VCC
ROSC
OSC
EIN
EIP
BY
OUT
BUF
S
Q R
RSFF
CMP
CTRL
VREF
ERRAMP
STAND
5
4 3
2
1
DCON
PCNT2
PBAULT
AURESET
BEEP
PBMUTE
AUDATA
AUSCLK
RCAULT
24 23 22 21 20 19 18 17 16 15 14 13
12 11 10
9 8 7 6 5 4 3 2 1
ATT
LIN
LLPFO
L–
L+ R+
R–
RLPFO
RIN
LHPVEE
LHPVCC
DAT
CLK
LAT
RHPVEE
RHPVCC
HP
BEEP
LPF
LPF
ATT
AMP&GAIN SEL.
AMP&GAIN SEL.
LOGIC
BIAS
INPGCK
INPGIN
MCPGIN
STOP
OPEN
DSPSTB
DSPSCK
DSPDAT
HREC
HPLAY
HKEY2
HKEY1
14
13
12
11
10
9
8
7
6
5
4
3
2
1
CNLAND1
LCD ASS'Y
7
6
5
4 3 2 1
24
23 22 21 20 19 18 17 16 15 14 13
12
11
10
9
8
7
6
5
4 3 2 1
VEE
VCC
DGND
ROUT
LOUT
RIHP
LIHP
AGND
RI
LI
L-CH
R-CH
6
5
4 3
2
1
6
5
4 3
2
1
6
5
4 3
2
1
PLVBAT
STDCK
BATON
CHGCNT
5
4 3
2
1
+
-
4
3 2
1
8
7
6
5
4
3
2
1
OUT
VDD
VSS
D
S1
S1
S2
S2
G2 G1
D
6
5
4 3
2
1
3
2
1
6
5
4 3
2
1 4
3 2
1
6
5
4 3
2
1
VSS
VDD
OUT
6
5
4
3 2 1
DCEXT
PLVDCI
_DCIN
PCNT3
RKEY
RPLAY
ELON
KEY
PLAY
R-CH
L-CH
9
8
7
6
5
4
3
2
1
Vout
GND
VCC
GND
R
L
R-CH
L-CH
4
3
2
1
8
7
6
5
4
3
2
1
DC-IN
TP804
TP803
NI-MH
EMPH0
23
1
3
2
1
D
G
S
G
D
S
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
+B
+B
+B
+B
+B
+B
+B
14
1
(–)
0V
0V
0V 1.87V
0V
4.43V
3.91V
4.47V
2.73V
(–)
2.21V
(–)
0V
0V
0V
0V0V0V
0.85V
0.86V
1.3V
5.39V
0V
4.65V
1.3V
0.78V
1.3V
5.38V
4.81V
5.39V
N.C.
N.C.
N.C.
LEDA02 TLGU1008
CNA01
LEDA03 CL190HBX
LEDA04
TLOU1008
RA16
330
QA01
2SC4738GR
RA15
10K
SWA10 FAST REVERSE
SWA12 ENTER
SWA07 VOLUME+
SWA08 STOP
SWA06 VOLUME–
RA01
5.6K
SWA03 BASS
RA02
8.2K
SWA02 PLAY
RA03
18K
SWA01 RECORD
RA04
56K
RA06
8.2K
RA07
18K
RA08
56K
SWA04 EDIT
SWA09 MODE
RA05
5.6K
SWA05 DISPLAY
SWA11
FAST FORWARD
CA01
0.1
CA02
0.1
RA13
18K
RA14
18K
RA12
33K
SWA13
OPEN/CLOSE
C270
1
R445
10K
Q443
2SC4738 GR
R441
120
C852
22/6.3
Q442
RN4911
6
5
4 3
2
1
R442
820
R812
100K
R813
2.2K
R815
100K
R816
100K
Q807
HN1C01 FU
R881
18K
C881
0.027
R882
10K
C860
1
C292
0.01
C774
1
C454
0.0022
R464
220K
R463
100K
R200
100K
C210
0.1
C200
1
IC200
5
4 3
2
1
C510 1
C509 1
TP463
C837
1
IC873
62GR4522
4.5V REGULATOR
C836
0.47
C859
1
IC404
5
4 3
2
1
TP500
C503
3.3/10
C505
0.001
C506
0.001
C501
0.0022
C502
0.0022
IC501
C500
10/6.3
C511
0.1
R501 470
R502 470
IC402
58X2404T
EEPROM
R416
1K
TP404
C401
0.1
D432
1SS372
R831
180K
C840
220/4
TP464
R731
47K
R733
47K
R732
47K
TP462
CN451
C202
4
7/6.3
L202
10µH
TP460
TP453
TP452
TP459
TP458
TP457
TP455
TP454
TP456
TP451
TP461
D801
RB521S30
R495
1K
R496
22
C493
0.47
Q493
2SA1832 GR
F841
0.4A
DC60V
TP841
R828
2.2K
R802
100K
Q802
FDN339N
R256
100K
R257
1M
R710
47
R822
100K
Q821
HN1C01FU
R821
2.2K
C253
0.01
R259
2.2K
R807
100K
Q806
HN1C01FU
R809
47K
R810
22K
Q805
2SA1832 GR
R808
560K
R829
100K
R282
47K
R254
1M
Q825
DTC144 EE
R817
100K
Q254
2SA1832 GR
R255
560K
R258
330K
IC271
75S54FU
OP AMP.
R278
22
C272
0.1
R277
2.2K
R274
56K
R275
15K
C273
0.1
C274 0.1
R276
120K
R272
470K
R273
47K
Q801
RN4904
TP801
TP805
TP806
IC801
R805
1M
R804
330K
Q803
2SA17457
R803
1K
R801
47K
Q804
HN1C01 FU
R281
1K
R291
2.2K
C291
1
R292
100K
R261
1M
R263
100K
R264
100
R262
330K
Q261
HN1C01 FU
R814
27K
R806
100K
R271
470K
R253
33K
C252
0.1
R251
22
Q251
2SA17457
C251
0.1
R252
560K
Q253
RN4904
IC251
S-80808LNP
RESET
Q252
FTD2017
C817
0.1
R818
47K
IC771
62GR2322
2.3V REGULATOR
5
4 3
2
1
C773
0.22
R850
22K
C850
0.1
C841
1
L841
4.7
I
C841
5
4 3
2
1
D841
F10J2E
C843
0.22
C842
33/6.3
TP842
D842
HRB0103B
C847
1
C846
0.1
R844
47
C845
0.1
C851
3.3
L851
10µH
C775
1
R871
10K
C863
1
C862
1
D861
F10J2E
D862
F10J2E
C776
1
D772
F10J2E
D771
F10J2E
IC871
TC7S86FU
EXCLUSIVE
OR GATE
IC851
C858
1
D851
F10J2E
D852
F10J2E
C876
1
C822
22/6.3
C823
220/4
C821
3.3
C828
1
C825
1
D822
HRB0103B
D821
D1FH3
IC821
L821
10µH
C838
0.1
R833
47
D832
HRB0103B
C833
0.1
C834
0.1
D831
HRB0103B
C832
0.1
C848
1
R841
100K
C844
10/6.3
IC842
62GR2522
2.5V
REGULATOR
C830
1
R824
10K
IC852
C857
33P
(CH)
R855
180K
C856
150P
(CH)
R857
560K
R853
270K
IC822
C827
82P
(CH)
C826
82P(CH)
R826
3.9M
R825
390K
R827
270K
R823
270K
R832
180K
R834
1.5M
C839
0.33
R854
10K
R717
1K
R711 6.8K
R719
6.8K
R712 6.8K
R720
6.8K
C734
0.1
C733
0.1
IC701
IR3R54N
AUDIO
AMP.
R714
10K
R713
10K
C712
100P
(CH)
C715
0.1
C711
100P(CH)
TP707
TP703
TP705
TP708
TP701
TP704
TP706
TP702
J701
OPTICAL/
LINE
C714
1
Q711
RN1444 A
C713
1
R718
1K
R715
100K
R716
100K
C703
0.01
R702
100
R701
100
C701
10/6.3
R703
100K
C702
10/6.3
C721 3.3/10
C723
0.001
C724
0.001
TP712
TP711
TP713
J702
MIC IN
TP714
C725
3.3/10
R723
6.8K
R724
6.8K
R725
100
C726
3.3/10
R726
39K
C722 3.3/10
R729 4.7K
R730 4.7K
R727
8.2K
C731
0.22
R728
1K
Q721
C765
0.22
C766
0.22
R766
15
R765
15
D495
MA8075M
D496
MA8075M
C492
1
C763
1
C764
1
L491
33
D493
015Z5.1Y
D491
015Z5.1Y
C491
0.1
R492
1K
D494
15AZ7.5Y
D492
15AZ7.5Y
TP726
TP725
TP724
TP723
TP722
TP721
TP728
J703
REMOTE
CONTROL/
EARPHONES
TERMINAL
TP727
TP772
TP771
C771
47/6.3
C869
47/6.3
IC202
IX2824AF
16MBIT
D-RAM
R758
100
R761
390K
IC703
IR3R59N
AUDIO AMP.
C754
1
R762
100K
R754
180K
C753
1
R757
2.2K
C760
0.1
C758
1
RDATA
VCCADDA
RDATA
GND
VCC
R412
15K
R411
100K
4
R415
1K
R413
1K
IC501
AK4551VT
AD/DA CONVERTER
IC200
62GR2522
2.5V REGULATOR
IC404
N7SZ86P5
GATE IC
IC801
S-80814ALNP
RESET
IC821 CPH3413 N-CH MOS FET
IC822 IR3M14N DC/DC CONVERTER
I
C841 XC6372C281PR 2.8V UP CONVERTER
IC851 CPH3413 N-CH MOS FET
IC852 IR3M14N DC/DC CONVERTER
IC871
Q721
2SD1979 S
RIPPLE
FILTER
L704
L702
L703
L714
L713
L712
L711
L456
L452
L453
L454
L457
L458
C451
0.022