Sony CX-LFA500 / XR-FA500 Service Manual ▷ View online
29
CX-LFA500
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
IC301
BD3881FV
– MAIN Board –
1
2
3
4
5
6
7
8
9
CONTROL LOGIC
TSD
VREF
OUT2
OUT1
RNF
VM
VCC
FIN
GND
RIN
IC604
BA6956AN
IC603
PST3445UL
– CONTROL Board –
30
CX-LFA500
6-11. IC Pin Function Description
IC601 LC876764C-51E3 System Control (CONTROL Board)
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 33
34 to 44
45
46
47 to 50
51
52 to 66
67, 68
69 to 71
72
73
74
75
76
77
78
79
80
81
82
83
I/O
O
O
I
O
I
O
O
O
O
O
I
I
O
—
I
O
—
I
I
I
I
I
I
I
I
I
I
I
I
—
O
O
—
O
—
O
—
I
—
O
O
O
O
O
—
I
O
O
O
O
Pin Name
C-PWM1
C-PWM2
C-SCOR
T-SOL
T-END
T-MTR.CONT
O-SHIFT
P-CON
PAMP-MUTE
F-DATA
I-RESET
I-XT1
O-XT2
GND.
XIN
XOUT
VDD1
I-KEY1
I-KEY2
BASS ENC INPUT
TRBLE ENC INPUT
VOL-ENC
RDS-SIG
T-SW
HOLD
I-SH DET
RDS-CLK
CD-DOOR-SW
RMC-IN
NC
O-GRID1 to 11
O-SEG1
VDD3
O-SEG2 to 5
GND.
O-SEG6 to 20
NC
I-INI-1 to 3
VDD4
O-CLOSE
O-OPEN
LED-CONT
O-DSG
T-REC
I-INI.BASS+2
T-PLAY.SW
R-MUTE
O-BIAS
CD-FU
TUNER
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
Clock shift control signal output
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 (IC603)
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
Encoder signal input from the bass encoder
Encoder signal input from the treble encoder
Encoder signal input from the volume encoder
RDS signal level input from the tuner
Tape switch status signal input from the tape deck (SW2 to 4)
AC detection signal input
DC detection and short circuit detection signal input from the power amplifier
RDS clock input from the tuner
CD door open/close switch signal input
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)
Initial selection signal input
Power supply terminal
CD tray close control signal output
CD tray open control signal output
Standby LED control signal output
Not used (open)
REC/PLAY control signal output to the REC/PLAY switch circuit
Not used (fixed at “L”)
Play switch signal input from the tape deck
Muting signal output to the tuner
Bias control signal output to the bias oscillation circuit
CD power supply control signal output
Not used (open)
31
CX-LFA500
Pin No.
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
I/O
O
O
O
O
O
—
—
I
I
I
I
O
I
O
O
I
O
Pin Name
R-CE
C-XRST
C-XLT
C-DATA
C-SQCK
VSS2
VDD2
RDS-DATA
R-ST
R-TUNED
C-SENS
C-LDON
C-SQSO
C-CLK
R-DATA
R-COUNT
R-CLK
Description
Tuner chip enable signal output to the tuner
Reset signal output to the CD unit
Latch signal output to the CD unit
Data output to the CD unit
SUBQ clock output to the CD unit
Ground terminal
Power supply terminal
RDS data input from the tuner
Stereo/mono detection signal input from the tuner
Tuner tuned status signal input
SENS signal input from the CD unit
LD ON signal output to the CD unit
SUB-Q data input from the CD unit
Clock output to the CD unit
Data output to the tuner
IF count signal input from the tuner
Clock signal output to the tuner
SECTION 7
EXPLODED VIEWS
NOTE:
•
-XX, -X mean standardized parts, so they may
have some differences from the original one.
have some differences from the original one.
•
Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.
•
The mechanical parts with no reference number
in the exploded views are not supplied.
in the exploded views are not supplied.
• Abbreviation
AUS : Australian model
E51
E51
: Chilean and Peruvian models
KR
: Korean model
The components identified by mark
0
or
dotted line with mark
0
are critical for safety.
Replace only with part number specified.
32
CX-LFA500
SP
: Singapore model
TW
: Taiwan model
1
A-4737-500-A CD DOOR ASSY
2
4-247-756-01 CABINET, TOP
3
1-693-619-11 TUNER (FM/AM)(AEP,UK)
3
1-683-620-11 TUNER (FM/AM)(EXCEPT AEP,UK)
0 4
1-555-795-00 CORD, POWER (EXCEPT TW,KR)
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
0 4
1-769-079-12 CORD, POWER (KR)
0 4
1-783-531-32 CORD, POWER (TW)
#1
7-685-248-14 SCREW +KTP 3X12 TYPE2 NON-SLIT
#2
7-685-647-79 SCREW +BVTP 3X10 TYPE2 N-S
#3
7-685-647-14 SCREW +BVTP 3X10 TYPE2 N-S
7-1. Overall Section
not
supplied
supplied
front panel assy
chassis assy
CD block assy
a
a
c
c
b
b
1
4
3
2
#1
#3
#3
#3
#3
#2
#2
#1
#1
Ver 1.1 2003.07
Click on the first or last page to see other CX-LFA500 / XR-FA500 service manuals if exist.