Sony CX-LEM550 / XR-EM550 Service Manual ▷ View online
25
25
CX-LEM550
7-9. SCHEMATIC DIAGRAM — CONTROL BOARD —
• See page 28 for Waveforms.
• See page 32 for IC Pin Function Description.
NO.
VOLTAGE CHART
IC801
IC801
1
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
VOLT
3.6
0
0
0
0
0
0
0
3.2
0
3.1
3.2
3.4
3.2
1.2
1.6
3.2
3.4
3.2
1.2
1.6
0
1.6
1.6
3.2
1.4
1.6
3.2
3.2
3.7
3.3
1.3
1.8
1.6
3.2
1.4
1.6
3.2
3.2
3.7
3.3
1.3
1.8
NO.
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
VOLT
1.8
3.2
3.2
0
3.1
-30.3
-28.4
-28.4
-28.4
-28.4
-28.4
-28.4
-28.4
-28.4
-28.4
-28.5
-28.5
-28.5
-14.1
-25.3
-30.6
-28.4
-28.4
-28.4
-28.4
-28.4
-28.4
-28.4
-28.4
-28.4
-28.5
-28.5
-28.5
-14.1
-25.3
-30.6
3.2
-27.8
-19.5
-16.7
-19.7
-19.5
-16.7
-19.7
NO.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
VOLT
-30.8
-22.4
-13.8
-16.7
-27.8
-30.6
-30.6
-22.3
-27.8
-30.6
-30.8
-22.4
-13.8
-16.7
-27.8
-30.6
-30.6
-22.3
-27.8
-30.6
–
–
–
–
–
0
–
–
–
–
0
3.6
3.6
3.6
–
2.7
0
3.2
0
0
0
2.9
NO.
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
VOLT
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3.1
0
–
0
–
0
3.1
0
3.2
–
–
–
–
–
3.1
3.2
3.2
0
3.2
0
0
0
3.2
0
3.1
0
0
3.2
0
0
10.0
10.0
10.0
10.0
10.0
10.0
0
3.7
0
0
3.1
3.1
3.3
3.2
2.0
0
NO MARK: FM
6
7
FLUORESCENT INDICATOR TUBE
1SS133T-77
1SS133T-77
1SS133T-77
SEL2155S-CD-TP
Q807,808
LED DRIVE
1SS133T-77
1SS355TE-77
M62703SL-TP
1SS133T-77
1SS133T
-77
1SS133T-77
KRC102S
22K
220/10V
RD5.1ESB2
100
RPM7240-H4
47K
47K
1
2
2
R868
SP,KR
0
4.7K
E51
1
R867
AEP,UK
1K
0
E51
IC802
REMOTE CONTROL
RECEIVER
IC801
SYSTEM CONTROLLER
LC876980B-52T4-E
IC801
Q804,805
CAPSTAN/REEL
MOTOR DRIVE
SWITCH
Q802,803
PLUNGER DRIVE
VOLTAGE DETECT
RESET SWITCH
IC803
TUNER/BAND
SYNCHRO
REC
nN
X
z
REC
PAUSE/START
?/1
N
470/6.3V
100/6.3V
47/25V
22/16V
100/10V
22/16V
MAIN
BOARD
CN303
(OPEN)
S820
ALBUM +
ALBUM -
DISPLAY
i-Bass
x
BASS/
TREBLE
. m
TUNING -
M >
TUNING +
CONTROL BOARD
MAIN
BOARD
CN302
TAPE
MECHANISM
DECK
M1
(DECK)
(T END)
(PACK)
(F REC)
(R REC)
(PLAY)
FM/AM
TUNER PACK
FM 75
Ω
(COAXIAL)
AM
ANTENNA
SP,E51,KR:11P
AEP, UK:15P
X802
(EXCEPT
AEP, UK)
(EXCEPT SP
, KR)
(AEP, UK)
G
C
E
Q808
Q807
R874
(Page 21)
(Page 21)
26
26
CX-LEM550
7-10. PRINTED WIRING BOARD — POWER BOARD —
•
See page 15 for Circuit Boards Location.
:Uses unleaded solder.
(AC IN)
1
4
5
9
MAIN
POWER
TRANSFORMER
MAIN BOARD
CNB903
E
1-861-721-
*
NOT REPLACEABLE :
BUILT IN TRANSFORMER
SUB POWER
TRANSFORMER
TRANSFORMER
*
(SP, E51)
(SP, E51)
(AEP, UK, KR)
(AEP, UK, KR)
VOLTAGE SELECTOR
S901
110-120V
220-240V
(AEP, UK, KR)
(AEP, UK, KR)
(SP, E51)
POWER BOARD
• Semiconductor
Location
Ref. No.
Location
D905
A-1
D906
A-3
D907
A-2
D908
A-2
D909
A-2
D910
A-3
D911
B-2
D912
B-2
D913
B-2
D914
B-2
D916
B-1
D917
B-1
D918
B-1
D919
C-1
D920
B-2
D921
B-2
D922
A-3
D923
A-3
(Page 20)
27
27
CX-LEM550
7-11. SCHEMATIC DIAGRAM — POWER BOARD —
1SS133T-77
1SS133T-77
10E-2
1SS133T-77
1SS133T-77
1SS133T-77
1SS133T-77
1SS133T-77
1SS133T-77
1SS133T-77
220uF
63V
1N5401TM
1N5401TM
1N5401TM
1N5401TM
1N4002B
1N4002B
1N4002B
1N4002B
11P
(SP, E51)
(AEP, UK, KR)
(AEP, UK, KR)
(AEP, UK, KR)
(AEP, UK, KR)
(AEP, UK)
(AC IN)
*
Not replaceable :
Built in transformer
*
(SP, E51)
(SP, E51)
(SP, E51)
MAIN POWER
TRANSFORMER
SUB POWER
TRANSFORMER
VOLTAGE SELECTOR
110-120V
220-240V
S901
POWER BOARD
MAIN
BOARD
CN901
E
(Page 21)
28
28
CX-LEM550
22.8
µ
s
4.5 Vp-p
472 ns
4.4 Vp-p
59 ns
4.5 Vp-p
Approx.800 mVp-p
1
IC101
yd
(LRCK)
10
µ
s/DIV 2 V/DIV
• Waveforms
– CD Board –
– CD Board –
2
IC101
yh
(BCK)
100 ns/DIV 2 V/DIV
3
IC101
uj
(XTAO)
20 ns/DIV 2 V/DIV
12.4 Vp-p
12.1
µ
s
5
Q344 collector
(REC mode)
5
µ
s/DIV 5 V/DIV
– MAIN Board –
3.4 Vp-p
30.5
µ
s
3.1 Vp-p
99.6 ns
6
IC801
qd
(O-XT2)
10
µ
s/DIV 1 V/DIV
– CONTROL Board –
7
IC801
qh
(XOUT)
50 ns/DIV 1 V/DIV
•
IC Block Diagrams
– CD Board –
IC101
CXD3059AR
4
IC101
ra
(RFACO)
1
µ
s/DIV 200 mV/DIV
SERVO
INTERFACE
32
RFDCO
34
AC_SUM
35
EQ_IN
33
PDSENS
31
AVDD4
91
LMUT
92
NC
93
XTSL
94
IOVSS0
95
XTACN
96
SQSO
97
SQCK
98
SBSO
99
EXCK
1
MIRR
2
DFCT
3
FOK
9
SFDR
10
SRDR
11
TFDR
12
TRDR
13
FFDR
14
FRDR
19
E
20
F
26
A
27
B
28
C
29
D
30
NC
21
TEI
23
FEI
22
TEO
24
FEO
25
VC
5
LOCK
6
MDP
7
SSTP
4
VSS
8
IOVSS1
18
NC
15
IOVDD1
16
AVDD0
17
AVSS0
68 EMPH
66 BCK
67 VDD
71 DOUT
69 EMPHI
70 IOVDD2
64 VSS
63 LRCK
65 PCMD
75 NC
73 TES1
74 IOVSS2
78 XTAI
76 XVSS
79 XVDD
80 AVDD1
77 XTAO
72 TEST
MIRR
DFCT
FOK
TE
FE
SUM
PWM
GENERATOR
SERVO
DSP
A/D
CONVERTER
DC/DC
CONVERTER
ASYNMMETRY
CORRECTOR
SUB CODE
PROCESSOR
ERROR
CORRECTOR
32k
RAM
D/A
INTERFACE
D/A
COVERTER
SELECTOR
DIGITAL OUT
CPU INTERFACE
CLOCK
GENERATOR
SERVO
AUTO
SEQUENCER
LPF
LPF
DIGITAL
CLV
VC
ATT
39
RFC
EQ
41
RFACO
AMP
36
LD
37
PD
42
RFACI
43
AVDD3
44
BIAS
56
DDVRSEN
57
AVSS5
59
NC
54
AVDD5
58
DDCR
60
BCKI
55
DDVROUT
45
ASYI
47
VPCO
48
VCTL
49
AVSS3
46
ASYO
DIGITAL
PLL
EFM
DEMODULATOR
51
FILO
50
CLTV
52
FILI
53
PCO
38
NC
40
AVSS4
APC
112
XPCK
111
XUGF
110
WFCK
109
ATCK
101
SYSM
100
XRST
103
VSS
102
DATA
104
XLAT
106
VDD
107
SENS
105
CLOK
108
SCLK
113
GFS
116
VDD
115
SCOR
114
C2PO
117
C4M
119
COUT
118
WDCK
120
NC
82 VREFL
83 AVSS1
84 AVSS2
81 AOUT1
86 AOUT2
87 AVDD2
88 NC
89 IOVDD0
90 RMUT
85 VREFR
61 PCMDI
62 LRCKI
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