Block Diagram -Front Section; Circuit Boards Location - Aiwa CDC-R237 Service Manual

4-4. BLOCK DIAGRAM — FRONT SECTION —
LCD DRIVER
IC601
VDD(+5V)
DFP IN
LCD DI
64 DI
LCD CLO
63 CL
LCD CE 62 CE
B
LCD DO
61 DO
EJECT
MAIN
S611
SECTION
A
(Page 20)
S621
RE1
ROTARY
ENCODER
WITH
RE2
SWITCH
S601,602,604-606,
608,610,612-618 46
KS3
I
I
49
KS6
KEY
MATRIX
50
KI1
I
I
54
KI5
4
S4
I
I
S39 39
44
KS1/S40
•
LCD601
KS1/S41 45
LIQUID
40
CRYSTAL
COM1-4 I
DISPLAY
43
S1 1
S2 2
S3 3
DIMMER ILL
CONTROL CHANGE
LAMP+B(+9V)
Q661 Q651,671
D661 D651-653 D641-643
LCD 671-673
BACK LIGHT
21

4-5. CIRCUIT BOARDS LOCATION

SUB board
FRONT board
• Waveforms
— Servo Board —
(MODE: CD PLAY)
1
0V
Approx. 200mVp-p
(FNI)
IC221 4
2
0V
Approx. 180mVp-p
IC221 5 (FPI)
3
0V
Approx. 600mVp-p
(TEO)
IC221 qf
4
1.3Vp-p
IC221 wg (RFGO)
5
1.4Vp-p
16.9344MHz
IC241 ul (XO)
21
CDC-R237
SERVO board
tuner unit
(TU101)
MAIN board
AUX board
Main Board
— —
6
1.1Vp-p
4.332MHz
IC151 qd (XIN)
7
1.5Vp-p
6.3MHz
IC901 ej (X1)