Sony CDX-V7800X Service Manual ▷ View online
37
37
3-15. PRINTED WIRING BOARD — RELAY SECTION —
(Page 38)
(Page 35)
CDX-V7800X
38
38
CDX-V7800X
3-16. PRINTED WIRING BOARD — DISPLAY SECTION —
(Page 37)
• Semiconductor Location
Ref. No.
Location
(D905)
A-6
(D951)
C-5
(IC901)
B-8
IC951
C-6
LED910
B-12
Ref. No.
Location
(
) : SIDE B
LED911
A-12
LED912
A-5
LED913
B-5
LED921
A-2
LED922
C-2
LED923
C-3
LED924
A-4
39
39
3-17. SCHEMATIC DIAGRAM — DISPLAY SECTION —
Note:
• Voltage is dc with respect to ground under no-signal
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
no mark : FM
CDX-V7800X
(Page 36)
40
40
• IC Block Diagrams.
3
EQ IN
4
AC SUM
5
GND
24 RFDCI
23 RFDCO
20 VFC
22 VC
19 BST
18 RFG
17 VCC
16 TE
15 FEI
14 FE
13 RFAC
21 RFC
6
A
7
B
8
C
9
D
12
SW
10
E
11
F
AC
SUM
APC
DC
SUM
EQ
AC
VCA
2
1
PD
LD
VC
VC
VC
VC
VC
VCC
VCC
RW/ROM
RW/ROM
RW/ROM
RW/ROM
RW/ROM
RW/ROM
RW/ROM
(H/L)
1
2
3
4
CLAMP
75
Ω
DRIVER
6.2dB
AMP
8
7
6
5
BIAS
75
Ω
DRIVER
6.2dB
AMP
VIN1
GND
VSAG1
VOUT1
VOUT2
NC
VCC
VIN2
1
36
FWD
2
REV
3
VCC2
4
VL0–
5
VL0+
6
VO4+
7
VO4–
8
VO3+
9
VO3–
S-GND
35 MUTE2
34 MUTE1
33 VIN4
31 VIN4+
30 VREF-IN
29 VIN1 (VREF)-SW
28 VREF-OUT (CH1)
10
VO2+
27 REG-OUT
11
VO2–
26 REG-IN
12
VO1+
13
VO1–
14
VCC1
15
VIN1
16
VIN1–A
17
VIN1+A
18
VIN1–B
25 VIN3+
24 VIN3–
23 VIN3
32 VIN4–
INPUT
OUTPUT
CONTROL
LEVEL
SHIFT
LEVEL
SHIFT
LEVEL
SHIFT
LEVEL
SHIFT
+
–
+
–
–
+
–
–
+
–
+
–
+
–
+
–
+
–
AMP-A
AMP-B
VIN1/VREF SW
MUTE1
MUTE2
CH2-CH4 OUTPUT
ON/OFF
CH1 OUTPUT
ON/OFF
GND
5V REG
+
–
–
+
–
22 VIN2+
21 VIN2–
20 VIN2
19 VIN1 +B
+
–
–
+
–
1
2
3
4
5
6
7
8
9
10
11
12
13
14
21
22
23
28
CTRL+CFG
REGISTER
SYNC CONTROL
&
VIDEO TIMING
GENERATOR
TELETEX
SWITCH AND
GAIN ADJUSTMENT
9-BIT TRIDAC
DEMULTIPLEXER
9-BIT DAC
AUTO TEST
COLOR BAR
PATTERN
RGB
ENCODING
MACROVISION
7.0.1/6.1
CLOSED
CAPTIONS
CGMS
TRAP
CHROMA
PROCESSOR
20
19
18
17
16
15
26
27
25
24
LUMA
PROCESSING
CSI2C
TTXS
CSI2C
VDDA
VDDA
VSSA
R/C
G/Y
VDD
TTXS/
CSI2C
CSI2C
TTXD
CKREF
RESET
SCL
SDA
VSYNC/
ODDEVEN
ODDEVEN
B/CVBS
VR RGB
IREF(RGB)
VDDA
YCRCB7
YCRCB6
YCRCB5
YCRCB4
YCRCB3
YCRCB2
YCRCB1
YCRCB1
YCRCB0
VSS
CB-CR
Y
HSYNC
CVBS
VR CVBS
IREF(CVSS)
VSSA
VSSA
+
–
–
+
–
–
+
–
–
+
–
+
–
+
–
–
+
–
–
+
–
+
–
+
–
+
–
–
+
–
–
+
–
+
–
DECODER
LATCH
SHIFT
REGISTER
CONTROL
–
+
+
–
–
1
2
3 4
5
6 7 8
9 10
20
19
18
17
16
15
14
13
12
11
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
43
44
LSELO
L4
L3
L3
L2
L1
VDD
R1
R2
R3
R4
R4
RSELO
RVRIN
RCOM
RT1
RT2
RT3
RTOUT
RSIN
NC
NC
RSB1
RSB2
RFIN
RFOUT
RROUT
VSS
CL
DI
CE
VREF
LROUT
LFOUT
LFIN
LSB2
LSB1
NC
NC
LSIN
LTOUT
LT3
LT2
LT1
LCOM
LVRIN
IC511 CXA2570N-T4
IC 551 NJM2268V (TE2)
IC518 STV0119B
IC401 LC75374E
IC512 LA6556
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