02
C850
C817
C814
C844
C804
C815
C803
C834
C833
C810
C824
C826
C840
C835
C823
C825
C830
C842
C829
C827
C828
C802
C801
C805
C843
C838
C839
C813
C812
C816
C820
C836
C837
JW805
JW803
JW824
JW814
JW817
JW802
JW818
JW804
JW808
JW819
JW809
JW828
JW807
JW813
JW829
JW827
JW812
JW833
JW834
JW830
JW826
JW825
JW823
JW820
JW801
JW816
JW822
JW811
JW835
JW815
JW810
JW831
JW821
JW806
JW832
R828
R831
R835
R836
R851
R833
R834
R848
R840
R866
R839
R861
R858
R850
R852
R868
R864
R842
R844
R853
R865
R843
R847
R845
R841
R875
R811
R884
R803
R804
R805
R855
R846
R867
R860
R837
R838
R857
R849
R854
R883
R885
R802
R859
R882
R869
R872
R870
R801
R816
R807
R806
R810
R814
R863
R862
R873
R808
R809
R886
R856
R830
R832
R829
R819
R818
R813
R812
R815
R825
R817
R824
R823
R822
R821
R820
R827
R826
C811
C841
C831
S802
CD
D802
OPR/BATT
S801
POWER
S804
RADIO
BAND
S803
TAPE
S810
SOUND MODE
S811
TIMER
R876
S812
SLEEP
R877
S813
STANDBY
R878
R879
S814
CLOCK
S816
MODE
S815
DSPL
ENT
MEM
S808
MEGA BASS
S807
u
S809
x
S805
m
TUNE
–
S806
M
TUNE+
X801
X802
B C E
Q802
B C E
Q801
1
5
10
15
20
24
25
30
35
40 41
45
50
55
60
64
65
70
75
80
IC801
IC803
1
1
5
10
15
20
23
1
3
2
5
9
10
1
1
2
5
1
3
2
5
10
15
20
22
23
CN802
CN803
L802
L801
CNJ801
CN804
LCD801
LIQUID CRYSTAL DISPLAY
CNJ806
CN808
CN808
CN806
CNJ807
C
CD BOARD
CN703
(Page 36)
A
MAIN BOARD
CN308
(Page 25)
B
MAIN BOARD
CN311
(Page 25)
1
2
3
CN807
1
2
1
2
3
CN806
1
2
3
CNJ804
2
1
CNJ806
S901
CD DOOR
OPEN/CLOSE
D801
1
3
1
2
2
1
VR802
VOLUME
+
–
VR801
PRESET
TIME SET
11
(11)
1-677-751-
11
(11)
1-677-750-
11
(11)
1-677-747-
11
(11)
1-677-745-
11
(11)
1-677-749-
[POWER KEY BOARD]
[PRESET BOARD]
[VOLOME BOARD]
[MEGA BASS BOARD]
[KEY BOARD]
[CONTROL BOARD]
\
.
>
X
11
(11)
1-677-746-
2
3
4
5
6
7
8
9
10
11
12
A
1
B
C
D
E
F
G
H
IC802
1
4
1
4
– 28 –
– 30 –
– 29 –
CFD-ZW755
5-5. PRINTED WIRING BOARDS (CONTROL SECTION)
z
Refer to page 16 Circuit Boards Location.
Note:
•
X
: parts extracted from the component side.
•
b
: Pattern from the side which enables seeing.
Ref. No.
Location
z
Semiconductor
Location
D801
D-9
D802
E-6
IC801
D-7
IC802
F-5
IC803
H-11
Q801
E-6
Q802
E-5
r
Waveforms (CONTROL SECTION)
1
IC801
es
(XTAL)
2
VOLT/DIV : 1 V AC
TIME/DIV : 50nsec
IC801
ud
(TX)
VOLT/DIV : 1 V AC
TIME/DIV : 10
µ
sec
2.98Vp-p
4.19MHz
4.8Vp-p
32kHz
Note on Schematic Diagram: Control Section
Note:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
U
: B+ Line.
• Power voltage is dc 9 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
