Service manual
– 29 –
MD-MT180
7
8 9 10 11 12
MCPGIN
+2.5V +B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B +B
+B
+B
+B
+B
+2.5V
+2.5V
+2.5V
LID OPEN
EJECT
AUDIO AMP.
AUDIO AMP.
16M BIT
D-RAM
4.5V REGULATOR
2.5V UP
CONVERTER
RESET
RESET
OPE AMP.
3.0V REGULATOR
N-CH MOS FET
2.3V
REGULATOR
REGULATOR
AD/DA
CONVERTER
EXCLUSIVE
OR GATE
DC/DC
CONVERTER
TP860
6
5
4 3
2
1
8
7
6
5
4
3
2
1
5
43
2
1
TP841
TP842
TP485
TP481
TP482
TP487
TP483
TP484
TP806
TP805
CK805
5
43
2
1
4
3
2
1
4
32
1
8
7
6
5
4
3
2
1
4
3 2
1
TP460
TP453
TP452
TP451
TP461
TP454
TP455
TP456
TP457
TP458
TP459
TP462
6
5
43
2
1
6
5
43
2
1
6
5
43
2
1
4
32
1
CK809
6
5
4 3
2
1
10K
5
43
2
1
TP729
3
2
TP412
3
2
6
5
4
3
2
1
TP407
TP406
TP415
CK405
TP401
22K
T
P402
CK200
9
10
11
12 13
14
15
16
17
18
19
20
21
22
23
24
8
7
6
5
4
3
2
1
5
4 3
2
1
TP500
TP804
TP702
TP704
TP706
TP708
TP701
TP705
TP707
TP703
10K
9
8
7
5
4
3
2
1
TP771
TP772
TP722
TP723
TP724
TP802
TP801
3
2
1
6
5
43
2
1
6
5
43
2
1
21
3
9
101112
13 14 15 16 17 18 19 20 21 22 23 24
8
7
6
5
4321
9
101112
13 14 15 16 17 18 19 20 21 22 23 24
8
7
6
5
4321
1
4
8
7
6
5
1 2 3 4
6
5
4
123
4
1
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
7
6
5
4
3
2
1
1
7
9
10
11
12
8
7
6
5
4
3
2
1
12
1
321
4
5
8
7
6
5
4321
9
10 11 12 13 14 15 16
HPLAY
STOP
PCNT1
VGBATT
VCC2R5V
DSPDAT
DSPSCK
DSPSTB
HKEY2
HKEY1
HREC
CHGCNT
PLVON
CHGON
PLVBAT
PCNT2
PLVBAT
CHGON
PLVON
PCNT2
PCNT1
CHGCNT
DFCK
DIN
ADPON
DAPON
EMPH1
ADDATA
OPTCNT
LRCK
BCLK
AUDATA
AUSCLK
DCVDD
VCCMICOM
TEMP
DCNT1
VCC4R5
-2R5
VCCADDA
EMPH0
SENSE
FOK
XRT
STOP
HPLAY
HREC
HKEY1
LDVAR
HKEY2
RKEY
DINT
VCCDRAM
VCCBATT
PBAULT
PBMUTE
BEEP
AURESET
INPGIN
INPGCK
RCAULT
R-CH
L-CH
I/O1
I/O2
WE
RAS
A9
A0
A1
A2
A3
VCC
A4
A5
A6
A7
A8
OE
CAS
I/O3
I/O4
GND
A10
GND
VCC
BATTERY
TERMINAL(227)
BATTERY
TERMINAL(211)
CHARGING
TERMINAL(226)
G1
G2
S2
S2
S1
S1
DD
VCOM
AOUTR
AOUTL
PWAD
PWDA
VSS
VDD
DEM1
DEM0
MCLK
SDTO
SDTI
SCLK
LRCK
AINL
AINR
OUT
VDD
VSS
VSS
VDD
OUT
V+
V-
O
–
+
+
–
O
R-CH
L-CH
L-CH
R-CH
DOLBY
MENU
GND
ENTER
VOL DOWN
VOL UP
BASS
REC
SKIP DOWN
SKIP UP
STOP
PLAY
KEY SWITGH
FLEXIBLE PWB (228)
LCD UNIT
(229)
LCD
DRIVER
LCD
EO
GND
VCC
ROSC
OSC
EIN
EIP
OUT
CTRL
STAND
BY
BUF
S
R
Q
RSFF
CMP
VREF
ERRAMP
GND
VCC
L
R
GND
VCC
GND
Vout
VEE
VCC
ROUT
DGND
RIHP
LOUT
LIHP
AGND
RI
LI
ATT
LPF
LIN
LLPFO
L–
L+
R+
R–
RLPFO
RIN
LHPVEE
LHPVCC
DAT
CLK
LAT
RHPVEE
RHPVCC
HP
BEEP
LPF
ATT
AMPuGAIN SEL.
AMPuGAIN SEL.
LOGIC
BIAS
DADATA
IC501
G
G
D
S
G
D
D
S
S
IC253,260,809 POWER SELECT CHARGE DRIVER
IC256 DIGITAL TRANSISTOR
IC258,259,802,892 POWER TRANSISTOR
TP803
,
EXCEPT FOR
MAIN PWB VERSION
1K
100K
0.1
10K
10K
10µH
IX2824AF
5.6K
8.2K
18K
5.6K
8.2K
18K
18K 18K
33K
0.01
0.1
6.8K
6.8K
6.8K
0.1
10/6.3
22
10/6.3
100
0.01
150K
1
150K
100K
2.2
1
IR3R59N
2.2K
0.1
100
33/6.3
47/6.3
0.22
6204B23M
1
0.0022
220K
100K
RB731U
560K
22K
1SS389
100µH
10/6.3
6204B45M
1
1
180K
0.33
180K
270K
330K
68P
(CH)
390K
3.3M
10K
18P
(CH)
MCH3409
47K
10K
M1FH3
1
1
M1FH3
F10J2E
100K
10µH
220/4
22/6.3
MCH3409
10µH
1
1
IR3M14N
0.1
0.1
47
100
39K
XP04501
0.1
47K
MA111
1K
100
390K
2SB1462J
560K
100K
100K
KTA2015 Y
47K
0.1
0.1
XP04501
100K
680
2.2K
2SD1819 AS
4.7K
0.1
22K
27K
100K
100
100
XP04315
68K
68K
0.1
47K
120K
39K
10K
0.1
0.1
150K
39K
MA111
XP04501
XP04313
NJM022V
22K
1M
100K
F10J2E
0.22
33/6.3
0.1
100K
22
0.4A,DC60V
1
6372C251
FTD2017
22K
560K
0.1
0.01
MM3032A
1
XP04313
10K
10K
1.5K
220/4
10K
10K
XP04501
22K
2SJ520 TL
100MHz
1
1
1SS388
27K
68K
2SD1819 AS
1
0.220.22
4.7
4.7
15
2.2
15
1
MA8075M
150mA
100mA
100mA
MA8075M
1K
DTC123 TKA
1K
1
0.1
0.1
100K
1
100K
560
F05J2L
100MHz
DC-IN
5V
HEADPHONES
OPTICAL/
LINE-IN
1.2K
56K
XP01401
S80819LN
1
74HC1G86
0.022
470
2.2
0.0022
1
2.2
470
3.3/10
22K
22K
0.1
33/6.3
F10J2E
AK4551VT
62FP1602
0.0022
0.1HRB0103B HRB0103B
0.1
IR3R54N
6.8K
0.1
100K
UN5213
0.1
56K
XP04313
100
1
S80808LN
1.1A
MA8051M
100MHZ
1
1
100P
(CH)
100P(CH)
1
10K
0.1
0.1
R413
R402
C130
R405
R406
L202
IC202
R456
R457
R458
R451
R452
R453
R483 R482
R481
C482
C481
CN482
R720
R719
R712
C733
C702
R702
C701
R701
C703
R754
C758
R761
R762
C762
C754
IC703
R757
C760
R758
C771
C869
C773
IC771
C774
C454
R464
R465
D461
R466
R467
D467
L860
C860
IC873
C837
C836
R831
C839
R832
R853
R857
C856
R855
R856
R854
C857
Q821
R891
R892
D821
C863
C862
D851
D862
R871
L851
C853
C852
Q851
L821
C821
C851
IC852
C847
C848
R844
R279
R277
IC259
C259
R288
D281
R261
R251
R284
Q257
R287
R285
R283
Q250
R296
C864
C865
IC892
R295
R293
R286
Q251
R255
C253
R254
R257
R292
R291
R272
IC256
R270
R271
C255
R266
R262
R269
R267
C254
C252
R252
R253
D251
IC258
IC253
IC255
R281
R282
R294
D841
C843
C842
C850
R850
L841
F841
C841
IC841
IC251
R819
C818
C802
IC801
C801
IC809
Q803
R814
R815
R816
C840
R812
R813
IC802
R807
Q801
R809
L802
R811
D803
R462
R460
Q461
C753
C766C765
R768
R767
R765
C761
R766
C492
D496
D495
J703A
R717
Q711
R718
C713
C716
C715
R715
C714
R716
C711
C712
L704
R802
D801
R803
R806
Q891
IC803
C876
IC871
C551
R501C509
C501
C511
C510
R502
C503
SW403
R423
R424
C401
SW401
C202
D861
IC501
IC902
C502
C830
C845D843 D842
C846
IC701
R711
C734
R703
R818
C251
R256
IC260
R250
C291
IC257
PS801
D802
L800
L801
R808
J801
R810
L702
L702~704:100mA
L703
L452
L453
L454
R714
R713
CN451
R425
J701
R728A
C866
C867
5
8
6
7
CB
Figure 29 SCHEMATIC DIAGRAM (2/4)