Sharp CD-BA250 Service Manual page 27

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