Sharp CD-BA250 Service Manual page 27

27 26 25 24 23 16 15 14 13 12 11 10 9 8 7 6
85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 VDD
1
-20dB
2
DSA_STB 3
T-BIAS 4
T_T1/T2 5
IC701
REC/PLAY 6
IX0399AW RES OUT 7
DRF 8
SYSTEM
WRQ 9
MICROCOMPUTER
RESET 10
X2 11
X1 12
Vpp/IC 13
XT2 14
ESS_DO SPAN 15
SS_DI VDD 16
SS_STB CD CLK 17
S_ACK CD DI 18
EG_POW CD DO 19
ATCH CD CE 20
CE 21
CLK 22
W OUT
DI 23
DO 24
AVSS
25
O/C SW/
26
DSA DATA
TUN SM
27
DSA_ACK
SPEANA2 28
29
30
46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
+B
R718
1K
2
+B
+B
+B
+B
+B
R766
10K
R767
10K
+B
R768
10K
7
TO CD SERVO PWB
P21 12-B
CNP8
9 8 7 6 5 4 3 2 1
CNS8
9 8 7 6 5 4 3 2 1
BI701
3 2 1
C701
1/50
+B
+B
R773 1K
R702 1K
R703 1K
R704 1K
R705 1K
R706 1K
R707 1K
R708 1K
C704
15P
C705
18P
XL700
4.194304MHz
+B
R709 1K
R710 1K
R711 1K
R712 1K
R713 1K
R714 1K
R715 1K
R716 1K
R717 1K
+B
SPEANA1
SPEANA0
+B
R765
4.7K
-B
+B
+B
+B
+B
8
Figure 27 SCHEMATIC DIAGRAM (8/9)
+B
-B
+B
+B
-B
+B
L701
100 H
5V BACK UP
+B
DS1SS133
+B
Q709
R781
KRC102 M
47K
2 3
C715 1
0.01
D715
DS1SS133
RD18 RD19 RD21 RD22
RD20
820
680 1K 1.5K 2.2K
SW720
SW721
TAPE SW722
CD SW723
TUNING
MEMORY/
SW724
DOWN
SET
REWIND
FORWARD
RD13 RD17
RD14 RD15 RD30 RD16
180K
680 820 1.8K 5.6K 3.9K
SW716 SW718
SW714 SW715 SW717
DIMMER VOLUME VOLUME
X-BASS EQUALIZER
DOWN
UP
RD04 RD05
RD01
RD02 RD03
680 1.5K 2.2K
820 1K
SW702 SW703
SW701
CLOCK TIMER
POWER
9 10
– 27 –
CD-BA250/CD-BA2600
REC/PLAY
+B
-B
+B
UN_SW 5V
+B
+B
+B
+B
+B
D712
D711
DS1SS133 DS1SS133
+B
D713
+B
C714
3.3/50
RX701
REMOTE
SENSOR
1 2 3
R782
100K C716
0.022
RD26 RD28
RD23 RD24 RD25 RD27 RD29
2.7K 3.9K 5.6K 10K 18K 33K 100K
SW726 SW727 SW731
SW730
STOP
PLAY VIDEO
SW725
SW729 TUNING
FAST
REC UP
PAUSE
RD07
RD06 RD08 RD09 RD10 RD11
2.7K 3.9K 5.6K 10K 18K 33K
SW712
DISC
SKIP
11
FFC701
1
TUN SM
1
CE
2
DO
3
DI
4
CLK
5
D_GND
6
T_BIAS
7
T_T1/T2
8
9
SMUTE
10
SPA_SIG
11
A_GND
12 CNP701
M_+12V
13
TO
–15V
MAIN PWB
14
–20dB P23 12-D
15
M_GND
16
SW_5V
17
18
SP_DET
19
SP_RLY
20
VF1
21
–VP
22
VF2
23
P-IN
24
24
D714
DS1SS133
R783
100
C717
47/50
SW732
TUNER
RD12
100K
SW713
OPEN/
CLOSE
12