Read Sony CDX-L490B / CDX-L490X Service Manual online
17
17
CDX-L490B/L490X
3-5. BLOCK DIAGRAM — DISPLAY SECTION —
X802
32.768kHz
37
38
40
41
29
30
43
SYSTEM CONTROL
IC801 (3/3)
LCD DRIVER
IC901
KEY 0
DATA
CLK
CE
ILL POWER
CONTROL
Q914
ILL B+
SWITCH
Q915
ILL B+
KEY 1
KEY 1
KEY 0
KEY MATRIX
LSW905-911,913,916-920
S901-906
KEY ACK
XT2
XT1
X2
48
ILL ON
44
SIRCS
BATT
X1
X801
8.38MHz
LED910,911
LED901,902,904-909
LSW905-911,913,914,916-920
REMOTE CONTROL
RECEIVER
IC951
LCD BACK
LIGHT
64
63
62
LCD
LCD901
(
)
KEY
ILLUMINATION
(
)
52
I
55
4
I
49
SEG4
SEG49
|
COM1
COM4
|
DI
CL
CE
LCD DO
LCD CLK
LCD CE
TUNER
SECTION
C
VCC
1
OUT
2
DST_SEL
SW803
FREQUENCY
SELECT
FM50k
AM9k
AM9k
FM200k
AM10k
AM10k
32
—
Main Board
—
1
2
8.38MHz
IC801
r;
(X2)
32.768kHz
IC801
ej
(XT2)
5Vp-p
3Vp-p
3
10.25MHz
IC601
1
(XO)
2.5Vp-p
• Waveforms
— Servo Board —
(MODE: CD PLAY)
1
2
3
IC1
ts
(PACK)
IC1
uj
(RFO)
1.2Vp-p
4
Approx. 100mVp-p
IC1
oa
(FEO)
0V
5
Approx. 100mVp-p
IC1
od
(TEO)
2Vp-p
16.9344MHz
IC1
wd
(XTAL)
5Vp-p
0V
3.2msec
(Page 16)
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