Block Diagram -Display Section - Sony CDX-GT42IPW Service Manual

CDX-GT42IPW/GT44IP/GT420IP
5-2. BLOCK DIAGRAM — DISPLAY SECTION —
KEY MATRIX 40
LSW901–911,
S901–904
41
D503
KEY ACKNOWLEDGE
SWITCH 52
Q664
76
RE901
PUSH SELECT
(VOLUME)
ROTARY
RE-0
31 RE-IN0
ENCODER
RE-1
32 RE-IN1
79
X502
32.768kHz
80
82
X501
18.432MHz
83 OSCOUT
62 NOSE_SW
IPOD CHARGE
IPOD-CHARGE CONTROL SWITCH BATT
IC260
14 OC1A
IPOD TX+5V
(IPOD IN)
IPOD-TX+5V CONTROL SWITCH 9 RXD
Q252,253
(2/2)
IPOD RX+5V
CONTROL SWITCH
IPOD-RX+5V 10 TXD
Q254,255
IPOD+3.3V
IPOD DETECT
IPOD DET
12 INT1
Q256
CDX-GT42IPW/GT44IP/GT420IP
SYSTEM CONTROL DISPLAY CONTROL
IC501 (2/2) IC901
KEYIN1
5
|
KEYIN0 S1
50
LCD_SO 28 64 I LCD901
DI
•
S48 55
LCD_SCK 29 63 CL
LIQUID
•
60
LCD_CE 27 62 CE CRYSTAL
DISPLAY
COM4 51
I PANEL
|
COM1
54
KEY ACK
AD_ON
1 2
PANEL+B
LED931
( LCD BACK )
LIGHT
XOUT
DIMMER
SWITCH
XIN
Q931
OSCIN
LCD
BACK LIGHT
SWITCH
Q932
REMOTE CONTROL
SIGNAL RECEIVER
IC971
SIRCS 64 3 OUT IR
IPOD ADAPTOR
BUS ON/OFF
IC250
SWITCH
Q258
INT0 11
BUSON A
AIN0/INT2 42 BUIN
D255
MOSI
1 UNI SI
A
MISO
2 UNI SO2
SCK 3 UNI CLK
D250
RESET 4
SYSRST
T1 41
XTAL1 8
X250
7.3728kHz
XTAL2 7
• NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
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 / W or less unless otherwise
4
specified.
• f : internal component.
• C : panel designation.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• A : B+ Line.
LSW901–911,
• B : B– Line.
LED941,942,
• H : adjustment for repair.
944,945,951–953
KEY • Voltages and waveforms are dc with respect to ground
( )
ILLUMINATE
under no-signal (detuned) conditions.
no mark : FM
( ) : AM/MW/LW
< > : CD PLAY
∗ : Impossible to measure
• Voltages are taken with a 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.
J
: CD PLAY
F
: FM
f : AM/MW/LW
L : AUX
g : IPOD
• Waveforms
— MAIN Board —
1
IC501 i; (XOUT)
MAIN
SECTION
(Page 21)
0.7Vp-p
32.768kHz
0.2 V/DIV, 20 µ sec/DIV
2
IC501 id (OSCOUT)
1.5Vp-p
18.432MHz
0.5 V/DIV, 0.1 µ sec/DIV
22 22
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor 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 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.
C
Q
These are omitted
B E
B E C
These are omitted
E C B
These are omitted
— ATMEL Board —
3 1
IC50 9 (XTI) IC250 8 (XTAL1)
1Vp-p
8.664MHz
0.5 V/DIV, 0.1 µ sec/DIV 0.2 V/DIV, 0.1 µ sec/DIV
0.7Vp-p
7.3728MHz