Kenwood RXD-M55-H Service Manual page 24

P Q
(X29-28XX-XX)
+5V
CD RF IC21 (BOTTOM VIEW)
AMP
2.6V 32 1 0.2V
1
A PD
2.6V 31 2 3.8V
C LD 2
2.6V 30 3 4.9V
B VCC +5V
2.6V 29
4 2.5V R223 R280 C260
D
RFN
2.5V 28
3.6K 1.8K 68P
28 F
2.1V
2.5V 27
5 R224
C211
27 E
RFOUT
3.6K
0.1
2.5V 26
TBAL 6 4.1V
C212 RFIN
7
0.1
2.4V 25 LDRCTL C227
FBAL C255
8 1.4V 0.22
C238
CAGC
0.022
R261
C224
0.1 2.4V
2.3V 24 29
GCTL
1K R237
0.047
37
9 2.5V
100
3.4V ARF
R214 2.5V 23
10 C228
FEOUT
CEA
22
100
0.039
2.5V 11
34 C256
22 OUT3T
R217
FEN 12 3.9V C229
100 2.5V 21 CBDO 33P
TEOUT 4700P
13 0V 23
39
BDO
C253 2.5V
3300P
20
35
TEN
14 3.7V
COFTR
C236
2.5V 19
C254
VREF
220P
18 15 0V
SLPSW OFTR 36
100P
R263
17 16 0V
21
GND NRFDET 38
1K
C258
220P
R264
36
100
C257
220P
R265
38
100 R266
100
+B
4.8V
+5V
5.0V
C284
47P
OPE AMP
8 9.1V R287
V+
22
9.3V
+B
BOUT 7 R281
47
BIN- 6
R271 C271
R275 2.2K 2.2u50
BIN+ 5
30
+5V
+
2.2K
+5V
+9V
13
C281
1200P
4.5V
9.0V
470u16V
LVREF
RVREF
C282
4.5V
4.5V
1200P
4.5V
R S
C251
R255 2200P
6.8K
C252
0.022
20
PMCK
19
SMCK
18
RST
17
STAT
16
DMUTE
15
SUBQ
14
SQCK
13
BLKCK
12
TLOCK
11
FLOCK
10
SENSE
IC22
9
MLD (BOTTOM VIEW)
DSP
8
MDATA
7
MCLK
6
TX
5
DVSS1
4
DVDD1
3
SRDAT
2
LRCK
1
BCLK
4.8V
C246
C264
Q203
15P 1
COFTR
C262 C261 C263 R249
CONT.
12P 12P 15P 100K
R247
+B
22 4.8V
C249 +5V
3900P
+5V
+5V
9.3V
+9V
+9V +9V
IC23
(BOTTOM VIEW)
4ch BTL
DRIVER
13 VO2+ STANDBY VO3- 14
D-
BAND-GAP
12 VO2-
VCC/VREF
D+ PVCC/2
11 VO1+ RESET CIRCUIT VO3+ 15
S-
10 VO1-
S+
VO4- 16
9 PVCC1
DIRECTION
DETECTOR VO4+
17
C299
PVCC2 18
8 PGND1
PGND2 19
7 NC2
6 NC1
RESET STBY 20
DIRECTION
5 OUT
DETECTOR
NC3 21
NC4
22
SVCC
DIRECTION 23
DETECTOR
4 PC1
VREF 24
2.5V 3 IN1
IN4 25
22 DIRECTION
0V 2 PC2
DETECTOR
23
2.5V 1 IN2
IN3 26
25
PVCC/2
T U
4.8V
+B
R3
2.2K
41
PLLF2
42 R5
TOFS
2.2K
43
WVEL
44 R232 C232
ARF
100K 0.022 C233
0.022
MUTE
45 R233
R6
IREF
46 R234 R235 56K 2.2K
DRF
33K 1M
47
DSLF
C235 1200P R4
2.2K
R236 C234
48
PLLF
330 0.1
49 4.8V MUTE
A. MUTE
VCOF +B
ON : 2.4V
50
AVDD2 OFF : -7.8V
51
AVSS2
52
EFM
53
C241
PCK
R241 0.33u50
54 MUTE
VCOF2
+ ON : 4.9V
55
2.7K
SUBC
56
SBCK
57
VSS
C244 C243
58
X1
MUTE ON : 0.1V
1000P 15P
OFF : 5.0V
R242 C242
59
X2
60 4.8V 1K R245 15P
VDD
4.7
C248
47P
R240
10
+B 5
+5V +5V
+5V
5.0V
+9V +9V
R299
2.2
2W
4.9V
T+
+5V AVR
C290
T-
C204 27P
8P
IC25
F-
R230 R291 9.3V
OUT IN +9V
2.2 4.7
F+ GND
1W
39
5.0V
CD MOTOR
28
DRIVER
IC26
9.0V
40
9.3V R268 9.2V
2.2
2.5V
C269
24
10u50 R270
2.5V +
3.9K
28
2.5V
26
CN26
1 LO+
2 LO-
3 GND
27 4 OPEN
24 5 CLOSE
V W
POWER
RELAY
DECK/TUNER : 18.1V
CONT.
Q52
R54
47K
R56 R55
100 1K
9.3V
C53 Q51
220u10
RIPPLE
C56 5.3V
FILTER
0.01
C3
1u50 C121 100P
D103
-32.4V -33.0V
Q1 B
-1.1V
-31.5V
0V
-31.5V
Q102
Q2
-32.6V
0V
Q101 Q103
C4
1u50 0V 0.6V
C54
0V 0.6V
Rch
22u50
Q101,102
-0.4V
2st DIFF.
1st DIFF. Lch
R45 R57
AMP
AMP
22K 4.7K
Q12
R43 4.9V 31.9V
8.6V
1K
R117
D101
270
+5V
-28.4V
29V
IC901
(BOTTOM VIEW)
4 5
GND SDA
3 6
A2 SCL
2 7
A1 WP
1 8 5.1V
A0 VCC
MEMORY IC
40
+5V
39
38
37
36
IC801
35
(BOTTOM VIEW)
4.9V
RDS
DEMODULATOR
X801 +5V
4.332MHZ
B
30
IC501
A
29
28
RESET
IC
R501
1.5K
D501
1/4W R503 27
4.9V
1K
24
5.0V
23
C667 120P
22
RESET
R786 1 21
IC
IC702
RESET
C701
R705 1u50 5.1V
+ D702
1K
Q701
5.4V
+B
+5V
+5V
+5V
+9V +9V
X Y
CD : 17.7V
Q111-114
POWER
AMP
-0.5V
Q109
Q109
BIAS
CURRENT
(Lch)
-31.5V
-31.5V
-32.6V
Q104
-1.1V
1.1V
-0.5V
2st DIFF.
32.7V
AMP
Q105
1.1V
Q110
BIAS
32.2V
CURRENT
(Rch)
Q105
2nd STAGE
DIFF.AMP
32.7V
+B
+5V
29V
+B
+5V
4.9V
5.0V
+B
R740
100K
R745
100K
R750
3.3K
40
OPEN
R748 39
CLOSE
3.3K
38
MCLK
R747 37
STAT
1K
36
MDATA
R746 35
CD BLKCK
1K
R785 100K
R739
34
CE2
R732 120K
C720 0.01
R731
100 33
RDS CLK
R784 100K
R783
100K
32
NO USE
R733 100 31
REM CONTROL
C733 56P
R757
100 30
SLT SW
R749
47K
29
XRST
R743 28
CD POWER
C743 0.01 100
C721 0.01
R736
100
27
OP SW
R734 47K 26
CE
R756 47K
25
RESET
R776
100 24
CL SW
23
SQCK
R744 1K
22
SUBQ
21
MLD
C717 100P
C718 0.01
C719 1
31