Block Diagram - Display Section - Sony CDX-S2250 Service Manual

3-3. BLOCK DIAGRAM – DISPLAY SECTION –
KEY MATRIX
LSW901-921
D503
KEY ACK ON
Q664
D510
CD
C SYS RST
SECTION
(Page 13)
RESET
IC602
2 1
BU+3.3V VDD VOUT
S702
RESET
X502
32.678kHz
CDX-S2250/S2250S
SYSTEM CONTROL LCD DRIVER
IC501 (3/3) IC901
41 KEYIN0
4
S1
| LCD901
LCD SO 28 64 DI
40 KEYIN1
|
50
LCD CKO 29 63 CLK CL
LIQUID
S48 •
55
LCD CE 27 62 CE CE CRYSTAL
DISPLAY
COM4 51
PANEL
|
|
COM1
54
52 KEY ACK
DIMMER
PANEL+B
1
76 XKEY ON
LED931,932
( )
LCD BACK
LIGHT
Q921
LED
7 NOSE DET
CONTROL
88 SYS RST
IR RECEIVER
IC971
77 RESET
SIRCS 64 2 OUT IR
82
OSC IN
79 XOUT X501
18.432MHz
OSC OUT 83
80 XIN
• Circuit Boards Location
LED951,952
LSW901-921
KEY board
15 15
SERVO board
SENSOR board
MAIN board
CDX-S2250/S2250S
tuner unit
(TU1)