Sony CDX-C90R Service Manual ▷ View online
– 31 –
– 32 –
CDX-C90R
3-4. BLOCK DIAGRAM — DISPLAY SECTION —
S630
(RESET)
Q309
SYSTEM CONTROL
IC300(2/2)
X500
14.74MHz
LCD
MODULE
24
14
D300,301
FRONT PANEL
D312
KEYIN0
KEYIN1
KEYIN1
AD ON
KEY ACT
D374
21
57
77
RC IN1
ENC+
ENC–
75
RC IN0
RC IN1
ENC+
ENC–
ILL ON 10V
RC IN0
51
20
22
76
64
90
58
59
SIRCS
BUSON
UNISO
UNISI
UNICK
BU IN
SYSRST
RESET
41
LCD ANG
BUS SO
FP OP
FP CL
EMPH
BUS ON
BUS SI
BUS CLK
BU IN
RESET
RE IN1
RE IN0
DISPLAY CONTROL
IC500
94
13
87
15
17
17
64
36
LINK-OFF
2 SIRCS
3 SIRCS
3 SIRCS
UNI-SO
BUS-ON
UNI-SI
FP OPEN
UNI-CI
BU-IN
84 BU-IN
EXTAL
XTAL
POS2
POS3
POS0
BATT
CHECK
1
12
6
4
3
2
9
8
11
10
13
HIGH VOLT
CHECK
Q407
LED DRIVE
(AMBER/GREEN)
IR
RECEIVER
SIRCS
CONTROL
Q308
8
3
2
1
6
5
4
7
BATT
BATT
1
2
1
2
BU 5V
66
67
84
FP CLOSE
83
EMPH I
82
SYSRST
63
LCD-RX
14
ROTARY
ENCODER
2
P ON 10V
Q311
IC505
IC501
CNJ301
BUS INTERFACE
IC302
RESET
IC400
IC400
D406
D409
Q310
IC502
(BUS CONTROL IN)
ILL ON 10V
ILL ON 10V
S622
(10 DEG)
S623
(20 DEG)
106
107
S620
(OPEN END)
S621
(CLOSE END)
04
72
LWR
4
LCD-RST
7
LCD-ST
12
LCD-SO
16
LCD-CO
71
HWR
70
RD
100
A20
88
SRAM-CS
A0
A19
DISPLAY FLASH
IC503
11
26
28
DISPLAY SRAM
IC504
CE
R/W
OE
22
29
24
ROM-CS 91
CE
WE
OE
18
21
23
23
34
36
43
45
45
56
A0
A18
D0
D15
29
36
38
38
45
1
8
16
25
48
48
DQ0
DQ15
A0
A18
13
15
17
17
21
1
12
23
25
23
25
28
30
31
30
31
I/O1
I/O8
D8-D15
D0-D15
A1-A19
A0-A18
3
CD
SECTION
37
32
POS1
35
COLOR
13
BU 5V
ILL ON 10V
(AMBER)
LED300,302
(OPEN END)
(OPEN END)
(GREEN)
52
53
53
2
6
1
7
KEY DET
IC304
CNJ300
(REMOTE IN)
5
3
4
6
2
CONTRAST
CONTROL
Q304,305
BOOT
EL ON
ILL ON
BOOTI
9
EL ON
6
ILL ON
5
4
MAIN
SECTION
LED DRIVE
Q301
BU 5V
55
RAMBU
68
EECLK
69
EEDATA
OUT
VDD
1
2
BU 5V
SRAM RESET
IC301
EECLK
EEDATA
EEPROM
IC303
6
5
FRONT PANEL
FRONT PANEL
FRONT PANEL
FRONT PANEL
(Page 28)
(Page 30)
– 33 –
CDX-C90R
3-5. CIRCUIT BOARDS LOCATION
TUNER UNIT
(TUX-012(E))
(TUX-012(E))
DISC IN SW board
LOAD SW board
SENSOR board
AUDIO board
LIMIT SW board
MAIN board
SUB board
SERVO board
liquid crystal module
Ref. No.
Location
(IC1)
C-2
IC2
F-2
IC4
F-1
(IC5)
E-4
IC6
F-5
(IC7)
B-5
(IC501)
E-1
IC551
F-5
(IC601)
F-5
Q1
E-4
Q2
E-5
(Q3)
B-1
Q4
E-5
Q5
E-4
• Semiconductor
Location
(
) : SIDE B
Note:
• Y
• Y
: parts extracted from the conductor side.
•
r
: Through hole.
• b
: Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side:
Parts on the parts face side seen from the
(Side A)
parts face are indicated.
– 34 –
3-6. PRINTED WIRING BOARDS — CD MECHANISM SECTION —
– 35 –
– 36 –
CDX-C90R
(Page 51)
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