IC 721
HA12187FP
BUS IC
LDO
LDI
CSLOAD
MS
46
STBY
53
LCDPW
38
POWER
ENC1M
33
SYSTEM
CONTROLLER
IC 601(2/2)
PD5709B
LANLP
8
15
CSEJ
ILMPW
B.U
CN701
CN402
Q761
B.U
Q752
Q753
FM/AM TUNER UNIT
19
3
PDIO
VCC
stby
B.U
LOAD
5
1
4
2
1
3
11
20
19
DECK UNIT
IC251
HA12228F
IC351
PA2020A
DOLBY-B
MECHANISM
DRIVER
CN251
CN252
CN254
CN255
CN253
6
16 MS
Lch
FWD
L-ch
REV
L-ch
39
32
33
18
19
17
3
1
5
6
8
7
10
CN256
3
1
5
6
S101
LOAD
S102
MODE
Q101
REEL
SENSE
M
M
M2
SUB
MOTOR
M1
MAIN
MOTOR
5
2
1
SENSOR UNIT
11
6
5
5
6
17
f/R
FR
42
41
DIR
MS
STBY
15
13
15
13
49
47
POS
ES
13
11
POS
ES
POS
ES
18
17
18
17
52
50
16
15
SC1
CM
20
B.U
16
16
51
14
SC2
SC1
CM
SC2
SC1
CM
SC2
VDD
CN501
ANT
SYSPW
PCE2
PCK
PCE1
SL
FMSD
S103
70
µ
s
4
4
mtl
MTL
8
8
1
2
6
5
TX-
TX+
BUS+
BUS-
MUTE
Q482
AMB
AMPW
Q541
ST
B.U
BU
FU901
CSL
MTL
44
CSLOAD
Q762
SWVDPW
MUTE
LCD 8V
ILL 10V
Q751
B.U
AUDIO+B
24 25
ENC1P
ENC2M
ENC2P
MODE
37
36
35
IC 3
EEPROM
28
27
FM/AM 1ST IF 10.7MHz
T51 Q51 CF51 CF52 CF53
IC1
MIXER, IF AMP, DET.
6
21
18
LDET
COMP
22
25
10
14
12 15 16
8
13
2
3
4
CF202
VDD
VCC
DI/DO
CE2
CK
CE1
SDBW
SL
FMSD
NL1
NL2
IC 2 FM MPX
AMANT
FMANT
ATT
ATT
AMRF
FMRF
IMG ADJ
RF ADJ
X901
10.25MHz
ANT ADJ
LOCL
23
LOCH
AMDET
MPXREF 41kHz
AM 2ND IF
450kHz
19
CREQ
11
DGND
1
STIND
L ch
5
R ch
9
24
AMDET
FMLOCL
20
17
7
AMPNS
WC
26
RFGND
AMIN
C
D
19
IC 541
HA12181FP
AM PNS
16
3
9
10
1
2
4
1
2
4
F
E
D
C
B
A
KEH-M8027ZT/XN/ES
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
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