22
22
CDX-GT42IPW/GT44IP/GT420IP
CDX-GT42IPW/GT44IP/GT420IP
• Waveforms
— MAIN Board —
5-2. BLOCK DIAGRAM — DISPLAY SECTION —
• 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
µ
F 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
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/MW/LW
<
> : CD PLAY
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
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
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.
Q
C
These are omitted
E
B
E
These are omitted
C
B
C
These are omitted
B
E
KEY ACKNOWLEDGE
SWITCH
Q664
X502
32.768kHz
79
80
40
28
29
27
41
52
76
SYSTEM CONTROL
IC501 (2/2)
DISPLAY CONTROL
IC901
KEYIN1
CL
CE
LCD_SO
LCD_SCK
LCD_CE
64
3
SIRCS
OUT
DIMMER
KEYIN0
31 RE-IN0
RE-0
RE-1
32 RE-IN1
KEY ACK
AD_ON
XIN
XOUT
X501
18.432MHz
82
83 OSCOUT
62 NOSE_SW
OSCIN
63
64
62
2
COM4
I
COM1
LCD901
LIQUID
CRYSTAL
DISPLAY
PANEL
D503
5
|
50
•
55
•
60
51
|
54
S1
I
S48
DI
LCD
BACK LIGHT
SWITCH
Q932
DIMMER
SWITCH
Q931
LED931
PANEL+B
(
)
KEY MATRIX
LSW901–911,
S901–904
(VOLUME)
PUSH SELECT
RE901
ROTARY
ENCODER
BACK LIGHT
1
LCD BACK
LIGHT
(
)
LSW901–911,
LED941,942,
944,945,951–953
KEY
ILLUMINATE
IR
REMOTE CONTROL
SIGNAL RECEIVER
IC971
MAIN
SECTION
A
BATT
(IPOD IN)
(2/2)
BUIN
BUSON A
42
AIN0/INT2
11
INT0
IPOD-CHARGE
IPOD-TX+5V
IPOD-RX+5V
IPOD+3.3V
IPOD DET
UNI SI
1
MOSI
UNI SO2
2
MISO
UNI CLK
3
SCK
SYSRST
4
RESET
41
T1
8
XTAL1
7
XTAL2
14 OC1A
9 RXD
10 TXD
12 INT1
X250
7.3728kHz
IPOD TX+5V
CONTROL SWITCH
Q252,253
IPOD RX+5V
CONTROL SWITCH
Q254,255
IPOD CHARGE
CONTROL SWITCH
IC260
IPOD ADAPTOR
IC250
IPOD DETECT
Q256
D250
D255
BUS ON/OFF
SWITCH
Q258
(Page 21)
0.7Vp-p
32.768kHz
1
IC501
i;
(XOUT)
1.5Vp-p
18.432MHz
2
IC501
id
(OSCOUT)
0.2 V/DIV, 20
µ
sec/DIV
0.5 V/DIV, 0.1
µ
sec/DIV
1Vp-p
8.664MHz
3
IC50
9
(XTI)
0.5 V/DIV, 0.1
µ
sec/DIV
— ATMEL Board —
0.7Vp-p
7.3728MHz
1
IC250
8
(XTAL1)
0.2 V/DIV, 0.1
µ
sec/DIV
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
