Service manual

MD-R2
– 31 –
7
8 9 10 11 12
Figure 31 SCHEMATIC DIAGRAM (2/6)
OPE AMP.
2
1
1
2
3
4
5
6
7
8
9
0
1
1
1
4
8
1
7
2
3
6
5
1
7
1
8
4
6
5
2
3
32
1234
5
6
7
89
MAIN PWB-A
P32 1 - D
TO DISPLAY PWB
CNP902
AD5V
FIL 2
24232221201918171615141312111098
7
FIL 1
BACK UP 5V
MD 7.5/5V
MD P-OUT
P-CNT
P-IN
MD DSTB
MD K-DATA
MD DSCK
DFS
DAC DATA
DAC MODE
DAC CLK
D-1,2
-31V FL VP
U-CON GND
+B
+B
AC POWER
SUPPLY CODE
AC 120V,60Hz
T.F
POWER
TRANSFORMER
+B
+B
+B
+B
+B
RESET
TO DISPLAY PWB
P32 1 - B
CNS903
R-CH
L-CH
MUSE
OS
OS
NC
RESET SW
LOGIC+5V
(FIN)
DATAi
+7V –7V
R-CH
L-CH
+7V
–7V
HP_AMP_R_OUT
HP_AMP_L_OUT
HP_AMP_GND
AUX_VR_R_OUT
GND
AUX_VR_L_OUT
AUX_AMP_L_IN
AUX_AMP_R_GND
AUX_AMP_L_GND
AUX_AMP_R_IN
+
+
(2/2)
(1/2)
(FIN)
(1/2)
+
(2/2)
+
GND
(–)
FL VP
L MUTE
GND
DATA0
TEST3 TEST2
AVSS
VSSO
VOUTL
VDDO
VOUTR
AVDD
VREFD
OVERFL
VDDD
VSSD
TEST1
VSSA
VINL
VDDA
VREFA
VINR
VADCN
VADCP
FL FIL
FL FIL
IC501
IS81233SGYX
REGULATOR
10
1
1
1
8
19
20
21 22 23 24 25
26
27
28
ANALOG
LINE OUT
–
–
–
–
R661
47K
R662
47K
R551
8.2
POSISTOR
CNP472
Q653
KRC102 M
C221
0.022
C223
0.022
C220
1000P
SW501
F552
1A
F551
1A
T551
C207
100/10
C530
0.022
C222
0.022
C455
820P
C667
0.1
C208
3.3/16
C212
3.3/16
R681
1K
R653
1K
R651
100K
C651
150P
C652
150P
R652
100K
R682
1K
R654
1K
C653
27P
C654
27P
R660
10
R659
10
CNP473
C525
100/10
C519
0.022
C518
100/10
C522
1000/6.3
D513
1SS133
D512
1SS133
C655
10/16
C656
10/16
R617
330
C613
47/10
R618
330
C614
47/10
R417
1K
R418
1K
C205
4.7/25
C203
47/10
C202
47/10
L201
10µH
L202
10µH
C658
220/10
C657
220/10
R668
82
C666
100/10
R667
82
C665
100/10
R670
330
D651
MTZJ9.1B
R669
2.7K
C616
100/10
Q506
2SD2012 Y
Q503
2SD468 C
Q504
2SD2012 Y
C201
100/10
C456
820P
R454
33K
C457
0.022
C461
0.01
R203
1M
R202
680K
C209
4.7/25
C206
1/50
R504
33K
R601
470
R602
470
R616
47K
R615
47K
R501
8.2
POSISTOR
R502
8.2
POSISTOR
C502
4700/25
C521
4700/25
C552
0.01
C551
0.01
R619
10K
R620
10K
Q601
2SC2878 B
Q602
2SC2878 B
R614
100
R613
100
C615
100/10
R609
1K
R610
1K
R607
1K
R605
22K
R611
1.5K
R606
22K
R608
1K
R612
1.5K
C603
220P
C607
220P
C611
47P
C608
220P
C604
220P
C612
47P
R458
10K
R457
10K
Q451
2SC2878 B
Q452
2SC2878 B
Q505
KRC102 M
D507
MTZJ5.6C
D506
MTZJ7.5B
C517
100/10
R511
0.8
POSISTOR
R512
470
R516
220K
C520
0.001
D509
1SS133
D510
1SS133
D508
MTZJ270D
R514
100K
D505
MTZJ6.8A
D504
MTZJ9.1B
R507
680
C515
10/16
C516
10/16
C513
47/25
C514
10/16
R510
100
R509
820
C510
1/50
C509
47/25
C511
47/25
C512
1/50
R508
100
D503
MTZJ9.1B
R506
100
Q502
2SB562 C
R505
680
C501
1000/25
D501
MTZJ6.8B
D502
MTZJ33B
Q501
KTA1266 GR
C504
220/50
C507
33/50
R503
1.8K
C505
10/50
C453
470P
C460
470P
C459
470P
C452
47/10
C451
47/10
R452
330
R451
330
R453
33K
R455
100
C454
470P
R456
100
IC201
UDA1340
/DA CONVERTER
R518
220
R517
220
D554
RL104A
D553
RL104A
D552
RL104A
D551
RL104A
C561
0.01
D555
RL104A
IC601
NJM4580D
LINE AMP.
IC601
NJM4580D
LINE AMP.
IC651
NJM4560D
IC651
NJM4560D
J101