Read Sony CDX-R450 / CDX-R550 Service Manual online
19
19
CDX-R450/R550
CDX-R450/R550
3-3. BLOCK DIAGRAM — DISPLAY SECTION —
(Page 17)
KEY ACK ON
Q501
X501
32.678kHz
79
80
83
82
41
28
29
27
40
52
76
77
SYSTEM CONTROL
IC501 (3/3)
LCD DRIVER
IC901
KEYIN0
CLK
CE
LCD SO
LCD CKO
LCD CE
3
AREA SEL0
KEYIN1
KEY ACK
XKEY ON
43 RC IN0
71 RC IN1
54 BU IN
60 UNI SCK
58 UNI SI
59 UNI SO
87 BUS ON
7 NOSE SW
88 SYS RST
RESET
2
1
XIN
XOUT
OSC OUT
OSC IN
X500
18.432MHz
S103
RESET
77
78
2
29
3-28,
30-64,
69
76
1
COM1
COM4
LCD911
LIQUID
CRYSTAL
DISPLAY
PANEL
D501 (1/2)
D501 (2/2)
D400
D511
65
|
68
|
S1
S62
|
DI
NC1
NC2
NC2
64
SIRCS
70
SYNCHRO SW
IR
LED902,914-918
LSW903-913,918-921
LED
CONTROL
Q925
S501
FREQUENCY
SELECT
LED931,932
PANEL+B
BU+3.3V
R550
REMOTE CONTROL
SIGNAL RECEIVER
IC972
PANEL+B
LED961
LSW901
S961
OPEN/CLOSE
2 OUT
BU+3.3V
(
)
(
)
(
)
KEY MATRIX
RESET
IC602
LSW901,903-913,918-921
S902,914-918
VDD VOUT
LCD BACK
LIGHT
CD
SECTION
C
10
3
B/U CHECK
BATT
BATT
CHECK
Q605
BATT
D602
BUS INTERFACE
IC601
BUS ON
CONTROL
Q600,601
CNJ400
BUS CONTROL
IN
4 CLK OUT
6
4
7
8
5
6
1
2
3
DATA I/O
1 BUS ON
2 RST OUT
11
CLK IN
8
DATA OUT
9
DATA IN
BUS IN 12
13
RST
LINK OFF
B/U CHECK
UNI CLK
UNI SI
UNI SO
BUS ON
SYS RST
J370
(REMOTE IN)
10k
r
9k
Click on the first or last page to see other CDX-R450 / CDX-R550 service manuals if exist.