Read Sony CDX-CA720X Service Manual online
17
17
CDX-CA720X
3-4. BLOCK DIAGRAM — DISPLAY SECTION —
3-5. CIRCUIT BOARDS LOCATION
LSW902,904,905,907,
911,913,915,916,918,919
S901,903,912,914,917
KEY
ACTIVE
Q551
DOOR IND
SWITCH
Q631
REMOTE
RECEIVE
RECEIVE
J561
(REMOTE IN)
IC971
X502
32.768kHz
15
16
12
13
5
18
20
19
4
26
91
98
6
29
SYSTEM CONTROL
IC501 (3/3)
LCD DRIVE
IC901
KEY IN0
DATA
CLK
CE
LCD SO
LCD CKO
LCD CE
KEY IN1
KEY ACK
AD ON
RC IN1
RC IN0
SIRCS
92 DOORIND
34 NOSESW
XIN
XOUT
OSC OUT
OSC IN
X501
18.432MHz
100
99
98
COM1
COM4
LCD
LCD901
LCD
BACK LIGHT
SWITCH
Q904
ILL+5V
LSW902,904,905,907,
911,913,915,916,918,919
LED901,903,912,914,917
D701
LSW801(1/2)
D702
D553
KEY
ILLUMINATION
(
)
90
|
87
|
SEG1
SEG84
3
|
86
|
LCD DATA
LCD CLK
LCD CE
ILL+5V
LED932-934,942-944
(LCD BACK LIGHT)
ROTARY
ENCODER
RE901
97 REIN0
96 REIN1
Z
S552
(NOSE)
LED801
(CD WINDOW)
LSW801(2/2)
Z
KEY MATRIX
1
MAIN board
LIMIT board
SUB board
DISC IN board
SUB (CD) board
KEY board
SERVO board
tuner unit
(TU10)
(TU10)
—
Main Board
—
1
2
18.432MHz
IC501
qs
(OSCOUT)
1.8Vp-p
32.768kHz
IC501
qh
(XOUT)
5.2Vp-p
• Waveforms
— Servo Board —
(MODE: CD PLAY)
1
2
3
IC1
ts
(PACK)
IC1
uj
(RFO)
1.5Vp-p
4
Approx. 100mVp-p
IC1
oa
(FEO)
0V
5
Approx. 100mVp-p
IC1
od
(TEO)
1.8Vp-p
16.9344MHz
IC1
wd
(XTAL)
5Vp-p
0V
3.3msec
Click on the first or last page to see other CDX-CA720X service manuals if exist.