Sharp MD-X7H Service Manual page 78

MD-X8H
MAIN PWB-A(3/3)
A
IC522
PIN
NO. VOLTAGE
1
0V
2
0V
3
0V
4
–10V
5
0V
6
0V
7
0V
8
10V
B
0V 0V
Q553
0.6V
KTC3199 G
R551
RMIC MUTE
5.6K
Q551
3.8V
KRA107 M
C
0V
3.8V
C549
2.2/50
R550
47K
R456
3.9K
D
E
2.4V
3
0V 1
F
TP22
1
TP21
2
L_MUTE
TP20
3
A_12V
TP19 +B
4
–15V
TP18 –B
5
CE
TP16
6
DI
TP15
7
CL
TP14
8
AUX_B
TP13 +B
9
G AUX_A
TP12
10
S_MUTE
TP11
11
R_CH_OUT
TP10
12
TP9 A_GND
13
L_CH_OUT
TP8
14
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 31.
1
R587
100K
C573
82P
MIC AMP.
R569
IC552
R585
18K
NJM4565D
3.9K
6
–
7
+
5
R586 3
+
3.9K 1
2
4 8
R566
8.2K
C593
0.022
R565
8.2K
–B
C452
4.7/25
R455
C451
KRC107 M
3.9K
4.7/25
R457
3.9K
R453
R465
5.2V
2.2K
1K
0V
R467
5.2V
Q469
2.2K
KTC3199 GR
5.2V
R454
R468
0V 2.2K
2.2K
Q468
R458
KTC3199 GR
3.9K
SRS
IC451
SRS5250S
Q467
KRA107 M
VOLTAGE
REGULATOR
3 2
Q461
0V
KTC3203Y
1
0V +B
11.2V 10.4V
R452
4.7K
2
11V
0V
R475
2.2K
C456
100/16
+B
CNS1000A CNS1000B
1 1
2 2
3 3
2
Figure 42 SCHEMATIC DIAGRAM (5/20)
FM SIGNAL
CD SIGNAL
C575
22/50
C576
22/50
R570
18K
C594
10/50
+B
R572
–B
100K
Q465
R571
100K
2
2.6V 3
0V
R489
1
22K
0V
C467
0.47/50
R466
1K
28 27 26 25 24 23 22 21 20 19 18 17 16 15
1 2 3 4 5 6 7
R483
100K
R482
R479
33K
22K
R484 R460
1.5K
C461
0.0047(ML)
R480
R481
47K
3.9K
C460
0.47/50
+B
3 4
– 42 –
23 24 25
C541
22/25
+B
R464
100K
C453
C454
2.2/50
2.2/50
C471
+B
470/16
R470
1K
R1080
1K
8 9
10 11 12 13 14
C475
47K
0.22(ML)
C474
0.47/50
R459
10K
R526 C557
22/25
47K
0V
A_GND
R521
5.6K
C555
0.001
C556
0.001
R522
5.6K
5
P40
26 27 28
29
3
3
Q
0V
1 2 C
2
1
0V
0V 0V
R505
47K
C515
2.2/50
C51
R506 2.2/5
47K
+B
C518
1/50
C520
C550
0.25/50
100/16
1 RF
2
D557 RF
C522
1SS133
0.1/50 3
RF
C524
4 RF
0.22/50
5
RF
C526
6
0.1 RF
C528
7 RF
0.22/50
8
RF
C530
9 RF
0.027(ML)
C948 10 RF
C532
0.1
0.015
11 RF
(ML)
RF
12
C534
13 RF
0.0022
+B
(ML)
RT
14
15 RF
C538
1/50
16
C540
10/16
+B
–B
Q501
R597
2SC2878 A
2.2K
0V
R509
0V 47K
C4
0V R510 10
47K
0V 0V
Q502 R598
C4
2SC2878 A 2.2K
10
6