Sharp CD-BK250W Service Manual page 27

LAY
31 30 29 28 27 26 25 24 23 16 15 14 13 12 11 10 9 8 7 6
81 83 84 87 88 89
82 85 86 90 91 92 93 94 95 96 97 98 99 100 VDD
1
0
-20dB 2
9 VLOAD
8 P11 DSA_STB 3
7 T-BIAS 4
P12
6 T_T1/T2 5
P13
IC701
REC/PLAY 6
5 P14
IX0427AW
4 P15 RES OUT 7
3 DRF 8
P16
SYSTEM
2 WRQ 9
P17
MICROCOMPUTER
RESET 10
P18
0 P19/DIST0 X2 11
9 X1 12
P20/DIST1
8 Vpp/IC 13
P21/DIST2
XT2 14
7 P22/DIST3
6 RDS-READY/ESS_DO SPAN 15
5 RDS-RDCL/ESS_DI VDD 16
4 CD CLK 17
RDS-RDDA/ESS_STB
3 CD DI 18
RDS-RST/ESS_ACK
2 NO USE / MPEG_POW CD DO 19
KARAOKE LATCH CD CE 20
0 CE 21
NO USE
9 CLK 22
DISTOUT/SW OUT
8 LCK 0 DI 23
7 MIC SW DO 24
AVSS
6 FPB 25
O/C SW/
5 26
FPA
DSA DATA
TUN SM
4 PLAY SW_B 27
DSA_ACK
NO USE
3 SPEANA2 28
CD CLAMP
2 29
SW
30
50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
N
+B
34
R718
K
1K
R732
1K
R761
10K
+B
+B
+B
+B
+B
R766
10K
R767
+B 10K
R768
10K
7
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P29 12 - B
TO CD SERVO PWB
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
4.194304 MHz
R769 1K
+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
+B
8 9
Figure 27 SCHEMATIC DIAGRAM (8/11)
CD-BK250W/CD-BK2600W/CD-BK270W
+B
-B
+B
+B
+B
R771
10K
+B
-B
+B
D711
L701 DS1SS133
100µH
5V BACK UP
+B
D713
DS1SS133
+B
RESET
C714
Q709
R781
3.3/50
KRC102 M
47K
2
3
C715 1
R782
0.01 100K
D715
DS1SS133
RD18 RD19 RD20 RD21 RD22 RD23 RD24
680 820 1K 1.5K 2.2K 2.7K 3.9K
SW720
SW721 SW726 SW727
TAPE SW722
CD SW723 PLAY STOP
SW724 SW725
TUNING MEMORY/
FAST FAST
DOWN
SET
REWIND FORWARD
RD13 RD14 RD15 RD16 RD17
RD30
680 180K
820 1.8K 5.6K 3.9K
SW716 SW718 SW719
SW714 SW715 SW717
DIMMER VOLUME VOLUME REVERSE
X-BASS EQUALIZER
DOWN MODE
UP
RD04 RD05 RD07 RD08
RD01 RD06
RD02 RD03
2.2K
680 1.5K 2.7K 3.9K
820 1K
SW701 SW702 SW703
ON/ CLOCK TIMER
STAND-BY
10
– 27 –
FFC701
1
MIC IN
1
KARAOKE LATCH
2
SPAN
3
SW OUT
4
ESS_ACK
5
ESS_STB
6
ESS_DI
7
ESS_DQ
8
TUN SM
9
CE
10
DO
11
DI
12
CLK
13
D_GND
14
T_BIAS
15
T_T1/T2
16
REC/PLAY
17
SMUTE
18
SPA_SIG
19
A_GND
20
M_+12V
+B
21
–15V
-B
22
–20dB
23
M_GND
24
SW_5V
+B
25
UN_SW 5V
26
SP_DET
27
SP_RLY
28
VF1
29
–VP
30
VF2
31
P-IN
+B
32
32
D712
DS1SS133
+B
D714
DS1SS133
+B
R783
RX701
REMOTE 100
SENSOR
1 2 3
C717
C716
47/50
0.022
RD26 RD28
RD25 RD27 RD29
5.6K 10K 18K 33K 100K
SW732
SW731
SW730 TUNER
VIDEO
SW728
SW729 TUNING
REVERSE
REC/ UP
PLAY
PAUSE
RD09 RD10 RD11
RD12
5.6K 10K 18K 33K
100K
SW712
SW713
DISC
OPEN/
SKIP
CLOSE
11 12