Block Diagram -Display Section; Circuit Boards Location - Sony CDX-L550X Service Manual

3-4. BLOCK DIAGRAM — DISPLAY SECTION —
SYSTEM CONTROL
IC801 (3/3)
5 KEY IN0
KEY MATRIX
LCD SO
LSW501-510,
LCD CKO
LSW513-522
4 KEY IN1
D801
KEY
ACTIVE 26 KEY ACK
Q801
AD ON
91
D802
DOOR IND
98 RC IN1
CNP801
RC IN0
6
(REMOTE IN)
IC502
IR
29 SIRCS
RECEIVE
ROTARY
97 RE IN0
ENCODER
96 RE IN1
RE501
S902
34 NOSE SW
(NOSE DET)
OSC OUT
15 XIN
X802
32.768kHz
16 XOUT
LCD DRIVE
IC501
80
SEG2
•
18 78 DATA
|
1
20 77 CLK
SEG66
|
LCD CE 19 76 CE
64
LCD
LCD500
COM1 65
| |
COM4 68
DOOR IND
92 DRIVE
Q914, 915
LED905,LSW916
POWER
LSW501-510
ILL ON 93 CONT
LSW513-522
Q906
( KEY
ILLUMINATION
SWITCH
BATT
Q905
( LCD BACK
LIGHT
12
X801
LED510-513
18.43MHz
OSC IN 13

3-5. CIRCUIT BOARDS LOCATION

RELAY board
)
)
• Waveforms
— Servo Board —
(MODE: CD PLAY)
1
16.9344MHz
wd
IC1
2
34msec
IC1 ts
3
IC1
4
Approx. 1Vp-p
IC1
5
Approx. 400mVp-p
IC1
17 17
SL SW board
IN SELF SW board
DISPLAY board
SERVO board
—
1
4.4Vp-p
(XTAL)
2
4.8Vp-p
(PACK)
1.2Vp-p
uj (RFO)
0V
(FEO)
oa
0V
od (TEO)
CDX-L550X/L570X
tuner unit
(TU601)
MAIN board
Main Board
—
3.8Vp-p
18.43MHz
qs (OSCOUT)
IC801
5Vp-p
30.5µsec
(XOUT)
IC801 qh