Block Diagram -Display Section - Sony CDX-GT34W Service Manual

CDX-GT34W/GT340
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
REMOTE
CONTROL
4 SIRCS
SIGNAL
RECEIVER
IC902
10 XIN
X502
32.768kHz
11 XOUT
15 OSCIN
X501
11.06MHz
13 OSCOUT
3 NOSE_SW
CDX-GT34W/GT340
LCD DRIVE
IC901
60
S1
55
LCD901
LCD_SO 64
1 DATA
I
50
LCD_CKO 2 63 CLK S48 LIQUID
I
CRYSTAL
LCD_CE 100 62 CE
5
DISPLAY
PANEL
54
COM1
I |
COM4
51
1 2
PANEL+B
LED940,944–952,
955,956,960,961,
LED931
LSW902–908
( )
LCD BACK
(
LIGHT
ILLUMINATE
DIMMER
SWITCH
Q931
LCD
BACK LIGHT
SWITCH
Q932
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
• 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
16 16
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
< > : 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
: AUX
L
g : BUS AUDIO
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.