Read Sony CDX-C4840R / CDX-C4850R Service Manual online
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CDX-C4840R/C4850R
4-4. BLOCK DIAGRAM — DISPLAY SECTION —
RESET
IC902
1
2
BU5V
BATT
BATT
90
13
RESET
SO
14
CKO
46
KEY IN0
104
CE
SO
CKO
CE
ILL ON
29 SYSRST
76 BU IN
SYSTEM CONTROL
IC801 (3/3)
LCD DRIVE
IC501
LCD
RC
LCD
BACK-UP
CHECK
Q906
SIRCS
BUFFER
Q806
ACC
CHECK
Q905
COLOR
SELECT
Q504
LCD POWER
CONTROL
Q901,902
ROTARY
ENCODER
RE501
KEY ACTIVE
Q914,915
+10V REG
Q903
POWER
CONTROL
Q913,919
BATT
CHECK
Q940
+8V REG
Q904
+8V REG
Q912
CD POWER
CONTROL
Q907,908
ANT POWER
CONTROL
Q924,925
13
2
BUS INTERFACE
IC803
RST
RST
22 CK
21 SO
UNI
20 SI
11
4
CLK
CLK
36 BUS ON
24 SIRCS
95 COM8V ON
35 CD ON
32
47
48
MD ON
BATT
101
108
RE IN0 106
RE IN1
KEY IN1
KEY IN2
79
NIL
37
NIL
61
IN1
49
IN0
107
ACC IN
111 ANT REM
109 PW ON
12
1
BUS ON
BUS ON
9
6
DATA
8
DATA
DATA
10
3
BATT
BATT
D910
4
7
8
5
6
1
2
3
CNP801
(BUS CONTROL IN)
+5V REG
Q909
CD POWER
CONTROL
Q910,911
BATT
BATT
BATT
ACC
D909
BATT
D940
+8V
CD5V
AMP ON
1
2
4
VCC
AMP+B
5 BU+B
AMP+B
ANT+B
MD 8V
BU5V
POWER SUPPLY
IC901
64
63
62
DIM ON 1
AMBER 3
GREEN 2
COLOR
SELECT
Q503
LED501-505,
LSW511-529
LSW511-529
DIMMER
CONTROL
Q501,502
LCD501
D-BASS
S501
D919
D918
CNP802
(REMOTE IN)
(REMOTE IN)
KEY MATRIX
LSW511-529
LSW511-529
S502
04
S900
RESET
PL501,502
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