Sharp CD-BA250H Service Manual page 24

CD-BA250H/CD-BA2600H
MAIN PWB-A1(1/3)
A
CNS601
R-CH
1 1
A_GND
2 2
L-CH
3 3
CD_GND
4 4
CD_+B
5 5
A_+B
6 6
BI601
(A_+B)
SW_5 V
1
B
2
3
4
5
6
7
8
9
10
11
12
13
C
14
17
18
19
20
21
D
E
TAPE1
PLAYBACK HEAD
R-CH
T1_R
1
1
A_GND
2 2
T1_L
3
3
L-CH
CNP101
ERASE HEAD
M_GND
1
1
F
ERASE
2 2
T2_R2
3
3
A_GND
R-CH
4
4
T2_R1
5
5
T2_L1
6
6
L-CH
T2_L2
7
7
TAPE2
RECORD/ CNP102
PLAYBACK HEAD
G
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 39.
1
CD_+B
SW_5 V
GND
L-CH
GND
R-CH
GND
M_+12 V +B
A+10 V
+B
GND
GND
SP_DET
SP_RLY
SW_5 V
–VP
VF2
VF1
P_IN
–15 V
+B
-B
+B
Q112~Q114 : SWITCHING
2
Figure 24 SCHEMATIC DIAGRAM (3/9)
Q602
KTC3199 GR
R612
390
R616 R610
2.2K 2.2K
C638
C636
0.001
0.001
C637
C635
0.001
0.001
R618
330
R611
R617
2.2K
R619 2.2K
330
Q113
C136 KRC104 M
R147
0.022
10K
0 V
2
1
0 V
R146
10K
R148
4.7K
0 V
1
9.3 V
Q112 8.6 V 0 V
KTA1266 GR
2
9.3 V
R111
15K
C101
560P
R101
1K
R102
1K
C102
Q105
560P
KTC3199 GR
Q101
2SC1845 F
0 V
0.7 V
R103
0 V
0 V 2.2K
0 V
C103
R105
180P
3.3K
0 V
0.7 V
0 V
Q103
2SC1845 F
Q104
C104
2SC1845 F
180P 0 V
0.7 V
0 V
0 V
R106
3.3K
0 V
R104
0 V
2.2K
0.7 V
Q102
0 V
2SC1845 F
Q101~Q106 : SWITCHING
3 4
– 24 –
R601
1K
R602
1K
C650
220P
AUDIO PROCESSOR
C652
220P
1
DI
R604 C610
10K 1/50 CE
2
C651
220P
VSS
3
LOUT
4
C608
0.1
C606 0.15
5
LBASS
R606
LTRE
3.9K
6
C612 C614
0.0027 1/50 LIN
7
C616
4.7/50
LSEL0
8
C618
1/50
L4
9
C620
1/50 L3
10
C622
L2
1/50
11
L1
12
R608 C624
1.2K
1/50
C626
0.0056
-B
R149
150
+B
3.4 V
L R
3
3.4 V
3
Q114
KRC104 M
R115
56
C111
100/25
C113
0.033
R123
R117
5.6K
100K
R119
3.9K
R113
1K
C109
R
330P
C107
330P
24 23 22 21 20
–
+ 112K
Hich=T1
+
112K
–
1 2 3 4 5
L C108
330P
C110
330P
R114
1K
R120
3.9K
R118
100K
R124
5.6K
C114
0.033
C116
C112
560P
100/25
R116
56
R112 15K
AN7345K
PLAYBACK AND RECORD/
PLAYBACK AMP.
5
IC601
LC75341
24
CLK
+B
VDD
23
C603
CCB
VREF 22/50
+
INTERFACE
22
–
C607
0.1
ROUT
21
C605
R60
0.15
RBASS 3.9K
20
RTRE
19
C613
RIN 1/50
18
C615
RSEL0 4.7/50
17
C617
1/50
R4
AUX
16
C619
1/50
R3
DECK
15
C621
1/50
R2
TUNER
14
C623
1/50
R1
CD
13
Q107,Q108 : MUTING
R137
220K
REC_R
R139 R138
0 V
10K
10K
0.7 V
0.7 V
0 V Q107 Q108
KTC3199 GR
KTC3199 GR
0
C125
22/50
19 18 17 16 15 14 13
–
+ 56K
Hich=CHROME
+
56K
–
6 7 8 9
10 11 12
C126
22/50
C132
47/25
R134
10K
IC101
6