Read Sony CDX-GT520 / CDX-GT52W Service Manual online
18
18
CDX-GT52W/GT520
CDX-GT52W/GT520
• Waveforms
— MAIN Board —
4-2. BLOCK DIAGRAM — DISPLAY SECTION —
for schematic diagram:
Note:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. (p: pF)
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.
•
f
: internal component.
•
C
: panel designation.
for printed wiring boards:
Note:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
a
: Through hole.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
•
A
: B+ Line.
•
B
: B– Line.
•
H
: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
) : AM
<
> : CD
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J
: CD
F
: FM
f
: AM
g
: AUDIO
L
: AUX
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)
parts face are indicated.
Note:
The components identi-
fied by mark
The components identi-
fied by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
KEY ACK
ENABLE
Q501
LED DRIVER
Q589,590
40
28
29
27
41
52
76
SYSTEM CONTROL
IC501 (2/2)
REMOTE CONTROL
SIGNAL RECEIVER
IC971
KEYIN1
71 RC_IN1
RC1
RC0
D501
43 RC_IN0
LCD_SO
LCD_CKO
LCD_CE
46
DOOR_IND
64
3
SIRCS
OUT
KEYIN0
48 RE_IN1
RE-0
DOOR_SW
RE-1
47 RE_IN0
XOUT
XIN
KEY ACK
AD_ON
70 DOOR_SW
7 NOSE_SW
LED201
(DISC IN)
LED202
KEY MATRIX
S901–915
VOLUME
CONTROL
DIAL/
SELECT
BUTTON
RE901
ROTARY
ENCODER
J370
REMOTE
IN
(
)
CN201
CN901
14
14
+
80
79
X501
32.768kHz
OSCIN
OSCOUT
83
82
X500
18.432MHz
S201
Z
MAIN
SECTION
A
S102
(FRONT PANEL DETECT)
LCD DRIVER/LED CONTROL
IC901
CL
CE
77
78
76
80
COM1
I
COM4
LCD901
LIQUID
CRYSTAL
DISPLAY
PANEL
3
|
64
65
|
68
S1
I
S62
DIMMER
DI
LED930,931
DISP+B
LED946,949,951–966,993
(KEY/VOLUME ILLUMINATION)
(
)
LCD BACK
LIGHT
LCD BACK LIGHT
DIMMER CONTROL
Q901
Z
(Page 17)
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
1.6 Vp-p
32.768 kHz
1
IC501
ul
(XOUT)
2.5 Vp-p
18.432 MHz
2
IC501
id
(OSCOUT)
1 V/DIV, 50 nsec/DIV
1 V/DIV, 50 nsec/DIV
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