Sony CX-LEM300 / XR-EM300 Service Manual ▷ View online
25
25
CX-LEM300
6-9. Printed Wiring Board – Power Section –
6-10. Schematic Diagram – Power Section –
• See page 15 for Circuit Boards Location.
TO
MAIN
BOARD
CNP305
(Page 21)
T902
POWER
TRANSFORMER
(MAIN)
T902
POWER
TRANSFORMER
(SUB)
AC
IN
IN
Ref. No.
Location
D906
B-3
D907
B-3
D908
B-3
D909
A-3
D910
A-3
D911
C-3
D912
C-3
D913
C-3
D914
C-3
D916
A-1
D917
B-1
D918
A-1
D919
B-1
D920
A-2
D921
A-2
D922
D-3
D923
D-3
D924
D-3
D925
D-3
• Semiconductor
Location
RY901
D906
D917
D918
D916
LF901
C911
C912
C910
C909
C906
C908
C905
C907
C913
C914
C915
C916
D922
D923
D924
D912
D914
D913
D911
D919
D909
D907
D910
D908
R901
R902
D920
D925
D921
T902
T901
CN901
CN902
R907
1SS133T-77
1N5401
1N5401
1N5401
0.022
0.022
0.022
0.022
0.022
0.022
0.022
0.022
0.022
0.022
0.022
0.022
1N4002B
1N4002B
1N4002B
1N4002
1N4002
1N4002
1N4002
1N5401
1N4002
1N4002
1N4002
1N4002
47k
47k
AC IN
1SS133
1N4002B
1SS133
10P
2P
100
26
26
CX-LEM300
LEVEL SHIFT
INTERFACE
INTERFACE
INTERFACE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
20
21
22
23
24
25
26
27
28
19
18
17
16
15
F
R
R
F
F
R
R
F
R
R
F
F
MUTE
THERMAL
SHUTDOWN
VREFOUT
VREFIN
POWVCC
CH1FIN
CH1RIN
CH2FIN
CH2RIN
CH2OUTR
CH2OUTF
CH1OUTR
CH1OUTF
CAP
AIN1
CAP
AIN2
GND
PRFVCC
MUTE
POWVCC
CH4SIN'
CH4SIN
CH4BIN
CH3FIN
CH3RIN
CH3OUTR
CH3OUTF
CH4OUTR
CH4OUTF
CAP
AIN3
GND
• IC Block Diagrams
IC101
CXD3017Q
IC102
BA5974FP-E2
TE
RFDC
CE
IGEN
AVSS0
ADIO
AVDD0
CLTV
FILO
AVSS3
VSS
AVDD3
DOUT
VDD
PCO
FILI
ASYO
ASYI
RFAC
BIAS
SSTP
DFCT
MIRR
MDP
LOCK
FOK
SFDR
VSS
TEST
FRDR
FE
VC
VC
COUT
SE
XTSL
TES1
SRDR
TFDR
FFDR
TRDR
TRDR
2
1
70
71
68
69
66
67
64
65
62
61
63
73
74
72
75
76
77
78
79
80
4
XRST
3
SQCK
SQSO
5
9
8
7
6
56
60
53
54
55
59
57
58
51
52
48
49
50
47
44
45
46
43
41
42
XLAT
CLOK
SENS
SYSM
DATA
XUGF
XPCK
GFS
C2PO
WFCK
10 11 12 13 14 15 16 17 18 19 20
21
22
23
24
25
26
32
33
30
31
36
37
34
35
39
40
38
28
27
29
SPOA
ATSK
SCLK
VDD
SCOR
SPOB
XLON
XTAI
XVDD
EMPH
AVDD1
AOUT1
AIN1
XTAO
XVSS
XVSS
AIN2
AOUT2
AVDD2
RMUT
LOUT2
LOUT1
BCK
LRCK
PCMD
LMUT
AVSS1
AVSS2
CPU
INTERFACE
SERVO AUTO
SEQUENCER
SERIAL IN
INTERFACE
OVER SAMPLING
DIGITAL FILTER
3rd ORDER
NOISE SHAPER
PWM
PWM
EFM
DEMODULATOR
TIMING
LOGIC
DIGITAL
OUT
D/A
INTERFACE
DIGITAL
PLL
ASYMMETRY
CORRECTOR
CLOCK
GENERATOR
MIRR, DFCT,
FOK
DETECTOR
DIGITAL
CLV
SUBCODE
PROCESSOR
SERVO
INTERFACE
SERVO DSP
FOCUS
SERVO
SERVO
TRACKING
SERVO
SLED
SERVO
PWM GENERATOR
FOCUS PWM
GENERATOR
TRACKING
PWM GENERATOR
SLED PWM
GENERATOR
16K
RAM
ERROR
CORRECTOR
INTERNAL BUS
A/D
CONVERTER
OPERATIONAL
AMPLIFIER
ANALOG SWITCH
– CD Board –
IC103
CXA2581N-T4
RW/ROM
RW/ROM
EQ ON/OFF
VOFST
VOFST
DVC
VC
VC
VC
RW/ROM
VC
DVC
30
29
28
+
–
+
–
DVC
VCC
DVC
27
26
25
24
RW/ROM
EQ
23
22
21
20
19
RFAC
VCA
VCC
+
–
DVC
+
–
+
–
RW/ROM
VC
RW/ROM
DVC
+
–
3
A
B
C
D
B
C
C
A
A
A
B
C
C
D
B
C D
D
+
–
1
2
APC AMP
5
6
7
8
9
4
RFAC
SUMMING
AMP
RW/ROM
APC-OFF
(Hi-Z)
RW/ROM
(H/L)
VOFST
VC
RW/ROM
+
–
10
11
GM
GM
18
17
16
B
D
A
C
13
14
15
12
EQ IN
LD
PD
GND
A
B
C
D
AC SUM
E
F
DVCC
DVC
RFAC
SW
DC OFST
RFDCI
RFDCO
VC
RFC
VFC
BST
RFG
VCC
CEI
CE
TE BAL
TE
FEI
FE
27
CX-LEM300
REC-O_L
REC-O_R
TUNER-R
TUNER-L
CD-L
AUX-L
OUT
-L
OUT
-R
T
ON_L-L
T
ON_L-R
AUX-R
CD-R
VSS
T
ON_H-R
T
ON_H-L
T
APE-L
T
APE-R
IC302
BD3881FV
– MAIN Board –
IC303
LA4663
1
RIPPLE FILTER/
STARTING TIME
2
IN1
3
PRE GND
4
IN2
5
STAND BY
SIGNAL MUTE
6
VCC1
VCC2
7
10
8
–OUT2
11
PWR GND1
PWR GND2
12
+OUT1
–OUT1
13
14
9
+OUT2
+
–
+
–
INPUT
AMP
INPUT
AMP
OUTPUT
AMP
OUTPUT
AMP
28
CX-LEM300
6-11.
IC Pin Function Description
• IC801
LC876756C-51R6-E (System Control)
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30 to 36
37 to 44
45
46
47 to 50
51
52 to 66
67 to 71
72
73
74
75
76
77
78
79
80
81
82
83
84
I/O
O
O
I
O
I
O
O
O
O
O
I
I
O
—
I
O
—
I
I
I
I
I
I
I
O
I
I
—
I
—
O
O
—
O
—
O
—
—
—
O
O
O
O
O
I
O
—
O
O
O
Pin Name
C-PWM1
C-PWM2
C-SCOR
TA SOL
TA END
TA MOTOR
HP MUTE
POWER ON
AMP-MUTE
F-DATA
RST
32.768kHz
32.768kHz
GND
8.64MHz
8.64MHz-EXTAL
VDD1
KEY1
KEY2
I POWER DOWN
VERSION
VOL-ENC
RDS-SIG
TA SW
SHT-CLK
I POWER MONITOR
RDS-CLK
A-MUTE
RMC
NC
G1 to 8
SEG1
VDD3
SEG2 to 5
NO-USE
SEG6 to 20
NC
VDD4
BASS+2
TA BIAS
ECO.LED
C-DOOR
TA REC/PB
AMP-STNBY
TA PLAY.SW
TU MUTE
FL-CON
CD
TU
TU CE
Description
PWM1 signal output to the CD unit
PWM2 signal output to the CD unit
SCOR (SUBQ request) signal output to the CD unit
Solenoid control signal output to the tape deck
Tape deck reel switch signal input
Motor control signal output to the tape deck
Not used (open)
Power relay control signal output
Muting control signal output to the power amplifier
Control signal output to the sound processor
Reset signal input from the reset IC (IC803)
Resonator terminal (32.768kHz)
Resonator terminal (32.768kHz)
Ground terminal
Resonator terminal (8.64MHz)
Resonator terminal (8.64MHz)
Power supply terminal
Key AD input 1
Key AD input 2
Power down detection signal input
Version setting terminal
Encoder signal input from the volume encoder
RDS signal level input from the tuner
Tape switch status signal input from the tape deck
Clock shift control signal output
AC detection signal input
RDS clock input from the tuner
Not used
Remote sensor signal input
Not used (open)
Grid signal output to the fluorescent indicator tube
Segment signal output to the fluorescent indicator tube
Power supply terminal
Segment signal output to the fluorescent indicator tube
Ground terminal
Segment signal output to the fluorescent indicator tube
Not used (open)
Power supply terminal
Not used (fixed at “H”)
Bias control signal output to the bias oscillation circuit
ECO LED control signal output
CD door open/close switch signal input
REC/PLAY control signal output to the REC/PLAY switch circuit
Standby control signal output to the power amplifier
Play switch signal input from the tape deck
Muting signal output to the tuner
Not used (open)
CD power supply control signal output
Not used (open)
Tuner chip enable signal output to the tuner
Ver 1.1
Click on the first or last page to see other CX-LEM300 / XR-EM300 service manuals if exist.