Block Diagram -Display Section - Sony CDX-GT24W Service Manual

CDX-GT24W/GT240/GT290/GT290S
Ver. 1.1
4-2. BLOCK DIAGRAM – DISPLAY Section –
SYSTEM CONTROL
IC501 (2/2)
KEY MATRIX 94 KEYIN1
LSW902–908,
S901–907
95 KEYIN0
92 KEYACK1
S909
PUSH SELECT
(VOLUME)
ROTARY
RE-0
82 RE-IN0
ENCODER
RE-1
81 RE-IN1
GT290/GT290S
42 RC_IN1
J561
97 RC_IN0
(REMOTE IN)
91 KEYACK0
REMOTE
CONTROL
4 SIRCS
SIGNAL
RECEIVER
IC902
BU+3.3V
S502
10K
FREQUENCY
70 AREASEL2
SELECTOR
9K
E,AR,MX MODEL
10 XIN
X502
32.768kHz
11 XOUT
15 OSCIN
X501
11.06MHz
13 OSCOUT
3 NOSE_SW
CDX-GT24W/GT240/GT290/GT290S
LCD DRIVE
IC903
3
S1
I
LCD901
LCD_SO 48
1 DI
I
34
LCD_CKO 2 47 CL S33 LIQUID
39
CRYSTAL
LCD_CE 100 46 CE
DISPLAY
PANEL
35
COM1
I |
COM4
38
1 2
PANEL+B
LED901,903,905,908,
910,911,913,916,918,
919,921,923,925,927,
LED931
LSW902–908
( )
LCD BACK
(
LIGHT
ILLUMINATE
DIMMER
SWITCH
Q931
LCD
BACK LIGHT
SWITCH
Q932
Abbreviation
AR : Argentine model
MX : Mexican model
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
For Printed Wiring Boards.
Note:
• X : Parts extracted from the component side.
• : Through hole.
a
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen
(SIDE B) from the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(SIDE A) the parts face are indicated.
• Indication of transistor.
C
Q
These are omitted.
)
KEY
B E
• Abbreviation
CND : Canadian model
AR : Argentine model
EA : Saudi Arabia model
MX : Mexican model
• Waveforms
– MAIN Board –
1
IC1 qh (XTAL1)
4 MHz
20 mV/DIV, 100 nsec/DIV
2
IC501 qa (XOUT)
32.768 kHz
0.5 V/DIV, 10 sec/DIV
18 18
For Schematic Diagrams.
Note:
• All capacitors are in μF unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specifi ed.
• : Internal component.
f
• C : Panel designation.
Note:
The components identi-
fi ed by mark 0 or dotted
line with mark 0 are criti-
cal for safety.
Replace only with part
number specifi ed.
• A : B+ Line.
• B : B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : AM/MW/SW
< > : CD PLAY
• Voltages are taken with VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
: CD PLAY
J
F : FM
f : AM/MW/SW
: AUX
L
• Abbreviation
CND : Canadian model
AR : Argentine model
EA : Saudi Arabia model
MX : Mexican model
3
IC501 qd (OSCOUT)
40 mVp-p 3.4 Vp-p
11.06 MHz
1 V/DIV, 50 nsec/DIV
1.7 Vp-p
Note:
Les composants identifi és
par une marque 0 sont
critiques pour la sécurité.
Ne les remplacer que par
une pièce portant le nu-
méro spécifi é.