Block Diagram -Front Section - Aiwa CDC-R937 Service Manual

CDC-R937/X937
4-5. BLOCK DIAGRAM — FRONT SECTION —
BU+5V
REMOTE CONTROL
RECEIVER
IC602
DFP IN
REMOTE 1 OUT VCC 3
LCD DI
LCD CLO
LCD CE
LCD DO
SW621
JOG SWITCH
SW601-603
KEY
MATRIX
LED
LED731
(CD IN)
MAIN
B
SECTION
ILL1
(Page 21)
ILL2
LED
DRIVE DRIVE
Q614 Q615
LED617-619 LED620-622
SW606-617
KEY3
KEY
KEY2
MATRIX
KEY1
RESET
(RESET)
PANEL SW
SEN 1
OPEN/CLOSE
MAIN
C
MOTOR (+)
SECTION
(Page 21)
(OPEN/CLOSE)
MOTOR (-)
SENS
PHOTO
PS671
REG+9V
LCD DRIVER
IC601
LCD601
1
S1
LIQUID
I
I
100 DI
52 CRYSTAL
S52
99
CLO DISPLAY
COM1 69
PANEL
98 CE
I I
97 DO COM8 62
P1 81
P2 82
83
P3
KS3
72
• I
73 KS4
DIMMER LED
CONTROL DRIVE
76 KI1
I I Q610 Q611,612
80
KI5
LED605 LED606-609
LCD
BACK LIGHT
LED
LED+9V
LED611-616
SW605
SW671
SW612
(PANEL DET)
DET
M4
CD+8V
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 diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1 /
4
specified.
• % : indicates tolerance.
• : internal component.
f
• 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.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
REG+9V
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F : FM
LED601-603 f : AM/MW/LW
J : CD
for printed wiring boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
: parts mounted on the conductor side.
x
•
a : Through hole.
• : Pattern from the side which enables seeing.
(The other layer's 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.
22 22
• Waveforms
— Servo Board —
(MODE: CD PLAY)
1
W or less unless otherwise
2
3
4
5
—
6
7
0V
Approx. 200mVp-p
IC221 4 (FNI)
0V
Approx. 180mVp-p
5 (FPI)
IC221
0V
Approx. 600mVp-p
qf (TEO)
IC221
1.3Vp-p
(RFGO)
IC221 wg
1.4Vp-p
16.9344MHz
IC241 ul (XO)
Main Board
—
1.2Vp-p
4.332MHz
IC151 qd (XIN)
1.4Vp-p
6.3MHz
IC901 ej (X1)