Sony CDX-L280 - Block Diagram -Display Section; Circuit Boards Location

17 17
CDX-L280
3-4. BLOCK DIAGRAM — DISPLAY SECTION — 3-5. CIRCUIT BOARDS LOCATION
KEY MATRIX
S501-511,
S512-521
KEY
ACTIVE
Q916
IR
RECEIVER
IC552
X802
32.768kHz
37
38
40
41
29
18
20
1930
43
47
44
SYSTEM CONTROL
IC801 (3/3)
LCD DRIVE
IC551
KEY 0
DATA
CLK
CE
LCD DO
LCD CLK
LCD CE
ILL POWER
CONTROLLER
Q914
INITIAL
RESET
D552
SWITCH
Q915
ILL + B
KEY 1
KEY 1
KEY 0
KEY ACK
AD ON
SIRCS
XT2
XT1
X2
48
ILL ON
BATT
X1
X801
8.38MHz
PL551,552
D561-581
LCD BACK
LIGHT
62
61
60
COM1
COM2
LCD
LCD501
D914
()
KEY
ILLUMINATION
()
64
•
63
1
|
23
•
25
|
53
•
SEG1
SEG52
|
DATA
CLK
CE
ILL+B
57
INH
MAIN board
tuner unit
(TU601)
DISPLAY board
SPEAKER board
IN SELF SW board
SW board
LOAD-SW board
SL SW board
• Waveforms
— Servo Board —
(MODE: CD PLAY)
1
2
3
IC1
ts
(PACK)
IC1
uj
(RFO)
1.2Vp-p
4
Approx. 1Vp-p
IC1
oa
(FEO)
0V
5
Approx. 400mVp-p
IC1
od
(TEO)
4.4Vp-p
16.9344MHz
IC1
wd
(XTAL)
3Vp-p
0V
22.7µsec
— Main Board —
1
2
32.768kHz
IC801
ej
(XT2)
3.8Vp-p
5Vp-p
8.38MHz
IC801
r;
(X2)