Sony CDX-L280 Service Manual ▷ View online
25
25
CDX-L280
(Volume)
(Volume)
D569
D561
R570
470
R569
470
D570
D564
R566
470
R565
470
R568
470
R567
470
R564
470
D565
R563
470
D566
R554
D562
D563
D568
D567
D574
D573
D572
D571
D578
D579
D575
R571
470
R572
470
R576
470
R575
470
R555
D580
D576
D555
R574
470
SML-310VTT86
R573
470
D581
D577
IC552
CNP552
S511
PL551
PL551,552
LCD BACK LIGHT
S509
D553
JR503
C551
R551
R559
R561
R562
R560
D552
R552
JR501
D551
C552
R553
C555
S516
R510
JR502
R514
R515
S517
D554
C553
R516
S518
S519
IC551
LCD501
S520
S521
S508
R518
R509
S507
S503
S504
R503
R502
R504
R505
R506
R508
R507
S506
S505
S502
PL552
R519
R517
S513
R501
S512
S515
S510
S501
S514
R513
R512
CNP551
R511
3-12. SCHEMATIC DIAGRAM — DISPLAY SECTION —
(Page 23)
Note:
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
no mark : FM
26
26
CDX-L280
IC1 µPD63711GC-8EU
• IC Block Diagrams
IC601 TB2118F (EL)
IC2 BA5810FP-E2
76
75
AGCI
AGCO
74
RFI
73
C3T
72
ASY
71
EFM
70
AVDD
69
7E DAC3
68
7D DAC2
67
7C DAC1
66
7F DAC0
65
MD
64
SD
63
TD
62
FD
60
ATEST
59
TEST1
58
TEST0
57
DGND
56
TSTB
55
TSCK
54
TSI
53
TSO
52
PACK
51
DVDD
61
AGND
1
DGND
2
RFOK
3
RST
4
A0
5
STB
6
SCK
7
SO
8
SI
9
XTALEN
10
DVDD
11
DAVDD
12
ROUT
13
DAGND
REGC
16
LOUT
17
DAVDD
18
R+
19
R–
20
L+
21
L–
22
XVDD
23
XTAL
24
XTAL
25
XGND
15
14
DAGND
77
RFO
78
EQ2
79
EQ1
80
RF-
81
AGND
82
A
83
C
84
B
85
D
86
F
87
E
88
AVDD
89
REFOUT
90
FE-
91
FEO
92
TE-
93
TEO
94
TE2
95
AGND
TEC
96
PD 97
98
LD
PN 99
100
AVDD
50 C2D3
49 C2D2
48 C2D1
47 C1D2
46 C1D1
45 DGND
44 PLCK
43 MIRR/WFCK
42 RFCK
41 LOCK
40 DVDD
39 TSOI
38 C16M
37 DGND
36 TX
35 HOLD/WDCK
34 LRCK
33 LRCKIN
32 SCKO
31 SCKIN
30 DOUT
29
28
DIN
FLAG
27 EMPH
26 DVDD
EFM
COMPARATOR
EFM
EFM
DEFECT
FOK
A3T
MIRR
FEO
TEO
TEOFS
FEOFS
RF
AMP BLOCK
SWITCH
MICROCOMPUTER INTERFACE
SCF
OSC
FOCUS
REGISTER
TRACKING
REGISTER
OCTUPLED
OVERSAMPLING DIGITAL FILTER
NOISE SHAVER
OUTPUT BUFFER
NOISE SHAVER
OUTPUT BUFFER
DE-EMPHASIS CIRCUIT
D/A
INTERFACE
CIRCUIT
OUTPUT PROCESSOR
DIGITAL
AUDIO
INTERFACE
DIGITAL PLL
TIMING GENERATOR
EFM DEMODULATOR
ERROR
CORRECTION
PROCESSOR
MICROCOMPUTER INTERFACE
CD-TEXT DECODER
SUB-CODE PROCESSOR
16K
SRAM
D/A
AUTO GAIN
CONTROLLER
FD/TD/SD/MD
CONTROLLER
CONTROLLER
ADDER
SVDRAM
MULTIPLIER
SVCRAM
SVROM
ROM
DECODER
CLV
PROCESSOR
DEFECT
COMPARATOR
RFENV
MIRENV
A/D CONVERTER
MEMORY
PROCESSOR
COMPARATOR
1
FWD
+
–
+
–
+
–
2
REV
LOADING PRE
FWD REV
3
LDCONT
6
IN2
7
PREVCC
8
POWVCC
VOL–
VOL+
IN1
4
PS
+
–
LEVEL
SHIFT
+
–
+
–
LEVEL
SHIFT
LEVEL
SHIFT
+
–
POWER
SAVE
CH1-4
MUTE
X3
9
10
11
VO2–
12
VO2+
13
VO1–
14
VO1+
5
BIAS
OPIN4+
OPIN4–
OPIN3–
OPOUT3
MUTE
POWVCC
GND
OPIN3+
OPOUT4
VO3–
VO3+
VO4–
VO4+
7.5k
7.5k
16k
16k
7.5k
7.5k
16k
16k
10k
10k
10k
10k
10k
10k
10k
10k
10k
10k
10k
10k
+
–
+
–
+
–
LEVEL
SHIFT
+
–
+
–
+
–
10k
10k
10k
10k
+
–
28
27
26
23
22
21
25
20
19
18
17
16
15
24
POWVCC34
(CH3,CH4)
PREVCC
(PRE.LOADING)
POWVCC12
(CH1.CH2)
VDD
AMP
AMP
AMP
VDD2
1
2
3
4
5
5
6
7
8
9
10
24
23
22
21
20
19
18
17
16
15
11
12
14
13
XO
OSC
CE
D_IN
CK
D_OUT
SR
LCL
I/O-2
SEEK
MONO
VDD2
IFC
VDD
FM_VCO
AM_VCO
D-GND
FM_CP
VT
AM_CP
VCC
REG
A-GND
XI
SERIAL
INTERFACE
I/O
PORT
OSCILLATOR
ON/OFF
BUFFER
REFERENCE
DIVIDER
PHASE
COMPARATOR
20BIT
IF COUNTER
PRESCALLER
12BIT
PROGRAMMABLE
COUNTER
+
–
REGULATOR
18BIT
18BIT
22BIT
40BIT SHIFT
REGISTER
REF
VCC
SEEK/RECP
SEEK/RECP
+
–
SIG
4BIT SWALLOW
COUNTER
OUTPUT
PORT
+
+
27
CDX-L280
IC401 LC75421M-TLM
LROUT
LFOUT
+
–
+
–
+
–
4
VSS
3
CE
DI
5
7
+
–
9
6
LFIN
LOUT
12
LIN
L5
L4
L3
R2
R3
R4
VREF
R5
L2
L1
R1
LSELO
LBASS1
10
+
–
13
14
15
16
17
18
+
–
LTRE
11
LSB
LBASS2
8
RROUT
RFOUT
34
33
31
29
32 RFIN
ROUT
26 RIN
RSELO
RBASS1
28
25
24
23
21
RTRE
27
RSB
RBASS2
30
+
–
+
–
+
–
+
–
+
–
+
–
+
–
2
1
VDD
35
CL
36
CCB
INTERFACE
CONTROL
CIRCUIT
LOGIC
CIRCUIT
CONTROL
CIRCUIT
LVREF
RVREF
+
–
22
20
19
28
CDX-L280
SECTION 4
EXPLODED VIEWS
NOTE:
• The mechanical parts with no reference
number in the exploded views are not supplied.
• Items marked “*” are not stocked since
they are seldom required for routine service.
Some delay should be anticipated
when ordering these items.
Some delay should be anticipated
when ordering these items.
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
original one.
• Color Indication of Appearance Parts
Example :
KNOB, BALANCE (WHITE) ... (RED)
Parts Color Cabinet’s Color
• Accessories are given in the last of this
parts list.
The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
Ref. No.
Part No.
Description
Remark
4-1. CHASSIS SECTION
R
Ref. No.
Part No.
Description
Remark
R
1
2
3
#1
#1
#1
#1
#1
#2
#2
#2
F901
TU601
not supplied
MG-393CX-121//K
#2
#3
#2
#2
4
6
7
7
8
11
9
10
12
13
14
5
15
1
X-3379-736-5 PANEL ASSY, SUB
2
X-3382-588-1 LOCK ASSY (S)
3
3-224-309-22 COVER
4
1-776-527-11 CORD (WITH CONNECTOR) (ISO) (POWER)
* 5
3-024-285-01 CUSHION (RUBBER)
* 6
3-041-173-12 BRACKET (CD)
7
3-922-535-11 SCREW (+BTT)
8
A-3274-620-A MAIN BOARD, COMPLETE
* 9
3-224-613-01 HEAT SINK
* 10
3-019-565-01 BRACKET (IC)
11
1-683-602-11 SPEAKER BOARD
12
3-041-261-11 BRACKET (TR)
* 13
3-224-612-02 CHASSIS (CD)
14
3-231-472-01 SCREW (+B 2X4)
15
3-223-913-11 LABEL (OP CAUTION)
F901
1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) 10A
TU601
A-3220-835-A TUNER UNIT (TUX-010)
#1
7-685-792-09 SCREW +PTT 2.6X6 (S)
#2
7-685-793-09 SCREW +PTT 2.6X8 (S)
#3
7-685-795-09 SCREW +PTT 2.6X12 (S)
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