Read Sony CDX-GT290EB / CXS-2969F / CXS-29FQ Service Manual online
CDX-GT290EB
CDX-GT290EB
14
14
4-2. BLOCK DIAGRAM – DISPLAY Section –
For Schematic Diagrams.
Note:
• All capacitors are in
• All capacitors are in
F unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
tantalums.
• All resistors are in
and 1/4 W or less unless otherwise
specifi ed.
• f : Internal component.
• C : Panel designation.
• C : Panel designation.
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.)
• A : B+ Line.
• B : B– Line.
• Voltages and waveforms are dc with respect to ground
• B : B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : MW
< > : CD PLAY
• Voltages are taken with VOM (Input impedance 10 M
( ) : MW
< > : CD PLAY
• Voltages are taken with VOM (Input impedance 10 M
).
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
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J :
J :
CD
F :
FM
f :
MW
L :
AUX
For Printed Wiring Boards.
Note:
• X : Parts extracted from the component side.
• a :
• X : Parts extracted from the component side.
• a :
Through
hole.
•
: Pattern from the side which enables seeing.
(The other layers’ patterns are not indicated.)
Caution:
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A)
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A)
Parts on the pattern face side seen
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
• Waveforms
– MAIN Board –
X502
32.768kHz
10
11
94
1
2
2
100
95
SYSTEM CONTROL
IC501 (2/2)
LCD DRIVE
IC903
KEYIN1
CL
CE
CE
LCD_SO
LCD_CKO
LCD_CE
DIMMER
KEYIN0
92 KEYACK1
82 RE-IN0
RE-0
RE-1
RE-1
81 RE-IN1
42 RC_IN1
97 RC_IN0
97 RC_IN0
91 KEYACK0
XOUT
XIN
X501
11.06MHz
15
13 OSCOUT
3 NOSE_SW
OSCIN
47
48
46
2
COM1
I
COM4
LCD901
LIQUID
CRYSTAL
DISPLAY
PANEL
3
I
34
39
35
|
38
S1
I
S33
DI
DIMMER
SWITCH
Q931
LED931
PANEL+B
(
)
KEY MATRIX
LSW902–908,
S901–907
(VOLUME)
PUSH SELECT
S909
ROTARY
ENCODER
BACK LIGHT
1
LCD
BACK LIGHT
SWITCH
Q932
LCD BACK
LIGHT
(
)
LED901,903,905,908,
910,911,913,916,918,
919,921,923,925,927,
910,911,913,916,918,
919,921,923,925,927,
LSW902–908
KEY
ILLUMINATE
4 SIRCS
70 AREASEL2
FM(200K)
AM(10K)
AM(10K)
FM(50K)
AM(9K)
AM(9K)
S502
FREQUENCY
SELECT
BU+3.3V
J561
(REMOTE IN)
REMOTE
CONTROL
SIGNAL
RECEIVER
IC902
1
Note: The components identifi ed by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specifi ed.
40 mVp-p
4 MHz
1.7 Vp-p
32.768 kHz
20 mV/DIV, 100 nsec/DIV
0.5 V/DIV, 10 μsec/DIV
1
IC1 qh (XTAL1)
2
IC501 qa (XOUT)
3.4 Vp-p
11.06 MHz
1 V/DIV, 50 nsec/DIV
3
IC501 qd (OSCOUT)
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