Sony CDX-L480N, Service Manual

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15 15
CDX-L480N
2-4. BLOCK DIAGRAM — DISPLAY SECTION —
2-5. CIRCUIT BOARDS LOCATION
LSW904,905,
LSW907-911,
LSW913-921
S900-903,906,912
KEY
ACTIVE
Q664
REMOTE
RECEIVE
IC971
X502
32.768kHz
15
16
12
13
5
18
20
19
4
26
91
98
6
29
SYSTEM CONTROL
IC501 (3/3)
LCD DRIVER
IC901
KEYIN0
DATA
CLK
CE
LCDSO
LCDCKO
LCDCE
KEYIN1
KEY ACK
AD_ON
RCIN1
RCIN0
SIRCS
XIN
XOUT
OSCOUT
OSCIN
X501
18.432MHz
63
64
62
COM1
COM4
LCD
LCD901
PANEL+B
PANEL+B
LSW904,905,907-911,
913-921
LED900-903,906,912,
951,952
LED931,932
(LCD BACK LIGHT)
D502
D501
52
|
55
|
SEG1
SEG46
|
DI
CL
CE
B.UP+B
KEY
ILLUMINATION
( )
KEY MATRIX
2
2
I
25
•
27
I
38
•
40
I
49
MAIN board
SERVO board
LIMIT board
SUB (CD) board
tuner unit
(TU1)
DISC IN board
KEY board
LOAD board
IC1 uj (RFO)
• Waveforms
— Servo Board —
(MODE: CD PLAY)
1
2
3
IC1
ts (PACK)
0V
1.8Vp-p
16.9344MHz
IC1 wd
(XTAL)
0V
4
Approx. 620mVp-p
IC1
oa (FEO)
5
Approx. 200mVp-p
IC1 od (TEO)
2.4Vp-p
4.8Vp-p
3.4msec
32.768kHz
IC501
qh (XOUT)
— Main Board —
1
2
3
18.432MHz
IC501
qs
(OSCOUT)
5Vp-p
4.332MHz
IC51 4
(OSCO)
4.5Vp-p
2.3Vp-p