Sony CDX-L550 / CDX-L550V / CDX-L550X Service Manual ▷ View online
17
17
CDX-L550/L550V/L550X
KEY MATRIX
LSW901-907,909-911
LSW914-919,
S902-907,
LSW801
KEY
ACTIVE
Q665
DOOR IND
DRIVE
Q633
AMBER
DRIVE
Q901
GREEN
DRIVE
Q902
J501
(REMOTE IN)
ROTARY
ENCODER
RE901
S701
(NOSE DET)
X502
32.768kHz
97
96
34
15
16
12
13
5
18
20
19
4
26
91
98
6
SYSTEM CONTROL
IC501 (3/3)
LCD DRIVE
IC900
KEY IN0
DATA
CLK
CE
LCD SO
LCD CKO
LCD CE
POWER
CONT
Q662
REG
Q660,661
92
DOOR IND
KEY IN1
KEY ACK
AD ON
RC IN1
RC IN0
RE IN0
RE IN1
NOSE SW
ILL +B
XIN
XOUT
OSC OUT
93
ILL ON
BATT
OSC IN
X501
18.43MHz
LED801,LSW801
LED902,903
LSW901-911,814-919
LED900,901,913,914
78
77
76
80
79
GREEN
AMBER
LCD901
L550
L550V
LED
DRIVE
Q906
LED
DRIVE
Q905
LED905,906
909,910
3-4. BLOCK DIAGRAM — DISPLAY SECTION —
3-5. CIRCUIT BOARDS LOCATION
MAIN board
SUB board
LIMIT board
DISC IN board
SUB (CD) board
LOAD board
KEY board
SERVO board
tuner unit
(TU10)
(TU10)
• Waveforms
— Servo Board —
— Servo Board —
(MODE: CD PLAY)
1
2
3
IC1
ts
(PACK)
0V
IC1
uj
(RFO)
1.8Vp-p
16.9344MHz
IC1
wd
(X TAL)
0V
4
Approx. 620mVp-p
IC1
oa
(FEO)
5
Approx. 200mVp-p
IC1
od
(TEO)
2.4Vp-p
4.8Vp-p
3.4msec
— Main Board —
1
2
3
18.43MHz
IC501
qd
(OSCIN)
2.2Vp-p
4.332MHz
IC51
5
(OSCI)
32.768kHz
IC501
qg
(XIN)
3.6Vp-p
1.8Vp-p
18
18
CDX-L550/L550V/L550X
3-6. PRINTED WIRING BOARDS — CD MECHANISM SECTION —
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
for schematic diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
%
: indicates tolerance.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: MW
J
: CD
for printed wiring boards:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
x
: parts mounted on the conductor side.
•
a
: Through hole.
•
: Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A)
(Side A)
parts face are indicated.
19
19
CDX-L550/L550V/L550X
Ref. No.
Location
(Page 21)
IC1
D-2
IC2
G-2
Q1
B-3
• Semiconductor
Location
20
20
CDX-L550/L550V/L550X
IC B/D
IC B/D
• Refer to page 17 for Waveforms.
3-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION — • Refer to page 29 for IC Block Diagrams.
Note:
• Voltage is dc with respect to
ground under no-signal conditions.
no mark : CD PLAY
no mark : CD PLAY
(Page 22)
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