Sony CX-LFA880 Service Manual ▷ View online
13
13
CX-LFA880
CX-LFA880
1-3. BLOCK DIAGRAM — MPEG SECTION-2 —
MPEG1
SECTION
E
AUDIO
SECTION
B
MPEG1
SECTION
J
PANEL POWER
SECTION
F
MPEG1
SECTION
G
MPEG1
SECTION
H
MPEG1
SECTION
I
: VIDEO
: DVD(AUDIO)
• Signal Path
• R-CH is omitted due to same as L-CH
: CHROMA
: COMPONENT VIDEO
: Y
: DVD(RF)
: DVD(DIGITAL)
: R,G,B
UD705
VIDEO DAC ENCODER
UD706
DRAM
UD708
EEPROM
UD707
FLASH MEMORY
169
CVBS/C/Y
SSCRRO/CPCIO11
MEMDAO
7
105
MEMWR
129
MEMRD
128
11 28
MFWOS2
SCDVD
HA0-12
HA0-7
123
MEMAD13
MEMAD19
SSCRRO/CPCIO10
8
ATDA2
34
201
IECTDI
ATDD4-11
ATDD11
19
9
14
16
18
16
18
ATDD13
20
SSCRXD/GPCI08
DSSTB
MRST
DSCK
DSDA
49
SSCRXD/GPCI09
51
ATDD12
21
ATDD2
170
CVBS/C
172
V/R/Y
173
C/B/V
Y/G/CVBS
VIDEO1
V/R/Y
C/B/V
SI-SW
S-VIDEO/RGB-SW
FS1
+5V
M-FS2
200
IECTDO
198
ICE TCK
194
LLCFGP
193
LLCFGA
177
GPCIO18
181
SPDIF/AOUT3
190
AB CLK
188
ALR CLK
184
AOUT O
179
AMCLK
46
GPC106
45
GPC105
203
JTMS/CPCIO47
RD
WR
CPCIO16
196
CPCIO17
195
BEO1
147-150,152
154,155
115,118,120,
122,106,108,
110,112
53-55,57-60,
62-64,67
20-24,
27-32
3-1,48,
17,16,9
30,32,34,36,
39,41,43,45
131,133-138
140,142-146
140,142-146
RAMADD0
RAMADD11
RAMBA0
MEMDA8
MEMDA15
MEMAD0
MEMAD12
MEMDA0
MEMDA7
A0
A12
DO8
DO14
A13
WE
12
RST
OE
A19
DO0
SDA
SCL
DO7
105,107,109,
111,113,
117,119,121
4-8,
18-25
29,31,33,35,
38,40,42,44
HA0-12
HA0-7
DATA& ADDRESS BUS
5
6
INTDET
LSI RST
RDY
SPD FG
AMCLK
CD DATA
BCK
LRCK
C2F
DCLK
DBGN
DFFR
DACK
DRFO
22
ATDD1
23
ATDA1
36
ATDA0
37
ATCS1
38
ATCS0
39
AMCLK
179
GPCI07
47
ATIORD
31
GPCIO1
41
GPCIO14
4
68
19
RAMBA1
66
PCLK
78
RASWE
75
RASCAS
74
RAMRAS
72
RADOM
A11
A0-A10
80,82,84,86,87,89,
90,92,93,95,96,98,
90,92,93,95,96,98,
99,101,102,104
2,3,5,6,8,9,11,
12,39,40,42,43,
45,46,48,49
RAMDAT0-15
D0-D15
CS
CLK
WE
CAS
RAS
LDOM
UDOM
76
QD707,710
BLANKOUT CONTROL
QD706
BLANKOUT CONTROL
QD705
SWITCH
Q852
INVERTER
Q853,854
SWITCH
Q856
SW
CONTROL
Q851,855
BLANKOUT
SWITCH
SCK
16
2
ML
15
MC
14
MD
13
DATA
3
LRCK
1
BCK
VOUTL
U704
AUDIO DAC
8
7
VOUTR
R-CH
DOUT
VIN3
5
4
5
6
3
2
1
VIN2
3
PWR SAVE
7
VOUT3
U852
VIDEO AMP DRIVER
JK801
Y
C
S801
RGB(AEP)
Y/Cb/Cr(EXCEPT AEP)
JK802
9
VSAG 8
VIN
4
VOUT
U710
VIDEO AMP
U851
VIDEO AMP DRIVER
2
VSAG 3
VIN3
5
VIN2
3
VIN1
1
OUT2
VOUT
11
OUT1 13
VSAG
CROUT
CBOUT
CYOUT
JK803
JK803
R
G
B
VOUT
BLAK
SW
(EXCEPT AEP)
AEP
Y
CROUT
CYOUT
CBOUT
VOUT
8
VOUT3 9
PWR SAVE 7
VOUT2 11
SEL
2
VIN2
3
VIN1
1
2
1
UD701
BUFFER
UD709
BUFFER
JK101
TX
VOUT 7
18 35 15 16 17 14 36
PB/CB
PR/CR
VIDEO OUT
VOUT
DIGITAL OUT
OPTICAL
S VIDEO OUT
15
11
7
19
16
8
6
2
3
5
1
2
4
6
14
14
CX-LFA880
CX-LFA880
1-4. BLOCK DIAGRAM — PANEL/POWER SECTION —
REMOTE
CONTROL
RECEIVER
IR651
D652
XT2
XT1
X501
32.768kHz
X2
X1
X502
8.38MHz
VFSTB
VFD651
FLUORESCENT
INDICATOR
TUBE
IC651
FL DRIVER
FUNCTION
KEY
S658,S651-654
VFCK
VEDA
REM
I/
LED
DRIVE
LED
Q502
1
RLY
RESET
SWITCH
IC502
RST
AVR
D302
PT901
POWER
TRANSFORMER(MAIN)
D901-904
RELAY
DRIVE
AC IN
D301
Q305,Q320
POWER
CONTROL
D324
D309
POWER AMP B+
-33V(VPP)
POWER AMP B-
PT902
(SUB)
TRANSFORMER
D+5V
D +5V
+12V(VM)
+9V
+2.5
+5V
REG
IC301
+12V
REG
Q311,312
+9V
REG
Q316
D306
VF
VF
Q307
RY901
D907
D906
CD ON
TOP
TCL
TOP
TCL
POWER
-33V
REG
Q315
Q318
SWITCH
+VDD
37
38
40
41
56
55
45
14
62
17
16
15
60
9
8
7
63
34
36
35
IC501 (2/2)
SYSTEM CONTROLLER
STB
26 KEY1
CLK
DIN
14-29,
31-38
SEG1-SEG24
42-39
GRID1-4
-33V(VPP)
VEE
VF
VF
1
5
2
+2.5V
REG
UD704
1
2
+3.3V
+3.3V
REG
U702
1
2
+1.8V
+3.3V
+1.8V
REG
UD703
+3.3V
REG
UD702
3
3
1
1
+5V
+5V
+12V(VM)
REG
Q504-506
FUNCTION
KEY
S665,S666,S656,S657,S659
27 KEY2
FUNCTION
KEY
S655,S660-664
28 KEY3
CLS
OPN
CLS
C
MPEG1
SECTION
D
MPEG1
SECTION
OPN
50
49
DSCK
DSSTB
DSCK
DSSTB
F
MPEG2
SECTION
48
47
DSDA
MRST
DSDA
MRST
SFTY 29
FPON 22
SWITCH
Q507
D501
30
Q306
SWITCH
A
AUDIO
SECTION
Q309,310
SWITCH
+9V
REG
Q196,197
SWITCH
Q198
+9V (TU)
PCON 64
INH 44
TUON 61
SW901
VOLTAGE
SELECTOR
E,SP,MY
AUS,AEP
15
CX-LFA880
• IC Block Diagrams
– MAIN Board –
IC101 TDA7464
PS1
RPS1
90Hz
LPF
9KHz
STEREO
SRS
CENTER
SP
ACE
EFFECT
CONTROL
PS2
RPS2
4KHz
PS3
RPS3
400Hz
34
35
36
37
38
39
40 41 42 43 44
PS4
RPS4
400Hz
TREBLE
AMP
MIXING
AMP
MIXING
MIDDLE
BASS
TREBLE
MIDDLE
BASS
50K
50K
50K
50K
50K
50K
50K
31.5dB
control
31.5dB
control
79dB
control
79dB control
79dB control
79dB control
VOICE
ON
SUPPL
Y
50K
100K
MIX SW
VREF
LPF
RLP1
R5
R6
MIX SW
SIM
MOVIE/
MUSIC
MOVIE/
SIM
RHP1
L-R
OFF
FIX
FIX
SRS
SRS
SURR
SURR
SURR
SURR
REAR
REAR
3BAND
3BAND
MUTE
MUTE
MUTE
MUTE
VA
R
VA
R
FIX
FIX
RB
RB
RM
RM
FIX
FIX
30K
30K
N.B.SW
N.B.SW
REC
AT
T
REC
AT
T
SPRK
AT
T
SPRK
AT
T
1
2
3
4
5
6
7
8
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
11
9
I
2
BUS DECODER +LA
TCHES
SCL
SDA
AGND
TREBLE_L
TREBLE_R
TREBLE_RI
MIDDLE_R0
MIDDLE_L1
MIDDLE_L0
BASS_RI
BASS_R0
BASS_L1
BASS_L0
BASSO_R
VAR_R
BASSO_L
VAR_L
NETW2
NETW1
HP2
HP1
LP1
LP
PS1
PS2
PS3
PS4
VS
CREF
R_IN4
R_IN3
R_IN2
LPVC
R_IN1
VREFOUT
L_IN1
L_IN2
L_IN3
L_IN4
RECOUT_L
RECOUT_R
L_OUT
R_OUT
DIG_GND
16
CX-LFA880
IC201 TA8142AP
– MPEG Board –
U706 LA6560-TE-L-E
1
2
3
4
5
6
7
8
Ch1/A
Ch1
Ch2
Ch1
NF
PRE OUT
CG
VCC
PRE OUT
NF
Ch2/A
16
15
14
13
12
11
10
9
REC IN
NF
REC OUT
ALC
GND1
REC OUT
NF
REC IN
Vref2
lref
Vref1
ALC
Ch2
-
+
+
-
11k
22k
BTL-AMP
Output
ON/OFF
+
-
VIN1/VREF-SW
[L] [H]
-
+
-
+
AMP-A
VIN1(VREF)-SW
:AMP-A
:AMP-B
VIN1(VREF)-SW
[L]:
[L]
Internal
VREF (2.5V
fixed
)
[H]:
[H]
Internal VREF
VCC1
VO1-
VO1+
VO2+
VO2-
VO3-
VO4-
V04+
REV
VO3+
FWD
VIN1+A
VIN1-B
FR
VIN1-A
VIN1
VLO+
VLO-
VCC2
FR
VIN4-
VIN4+
MUTE
VIN1+B
VIN2
VIN3
VIN3-
VIN3+
VIN2-
VIN2+
VIN4
VREF-IN
S-GND
REG-IN
REG-OUT
VIN1(VREF)-SW
MUTE
+
-
+
+
-
-
-
+
-
+
AMP-B
VREF- OUT(CH1)
22k
11k
11k
22k
22k
11k
VCONT
(LOAD output voltage setting)
Thermal Shutdown
Output Control
Level Shift
Level Shift
Level Shift
Level Shift
Signal System GND
Power System GND
Input
Power System GND
-
+
-
+
1
2
3
4
5
6
7
8
9
15
16
10
11
12
13
14
17
18
22
21
20
19
23
24
27
26
25
34
33
32
31
30
29
28
35
36
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