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Model
CFD-G70
Pages
52
Size
4.7 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cfd-g70.pdf
Date
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36
CFD-G70
Note on 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
 
W or less unless otherwise
specified.
•
f
: internal component.
•
5
: fusible resistor.
• C : panel designation.
Note:
The components identi-
fied by mark 0 or dotted
line with mark 0 are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
• A : B+ Line.
• H : adjustment for repair.
• Total current is measured with no cassette installed.
• Power voltage is dc 9 V and fed with regulated dc power
supply from battery terminal.
CONTROL
CIRCUIT
LOGIC
CIRCUIT
CONTROL
CIRCUIT
CCB
INTERF
ACE
1
2
3
4
5
6
7
8
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
15
14
13
12
11
10
9
DI
CE
VSS
TEST
LOUT
LBASS2
LBASS1
LTRE
LIN
LSELO
TAPE
TUN
LINE
CD
NC
CL
VDD
VREF
RVREF
LVREF
NC
ROUT
RBASS2
RBASS1
RTRE
RIN
RSELO
TAPE
TUN
LINE
CD
NC
• Voltage and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• 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.
• Signal path.
F
: FM
f
: AM
E
: PB
a
: REC
J
: CD
• Abbreviation
CND : Canadian
MX
: Mexican
E4
: 110-120V/220-240V AC changeable
E92
: Central and South America
IC321   LC75342
37
CFD-G70
• Waveforms
1
2
IC701 qd FF
VOLT/DIV : 0.1 V AC
TIME/DIV : 20 msec
1
3
VOLT/DIV : 0.1 V AC
TIME/DIV : 20 msec
4
VOLT/DIV : 1 V AC
TIME/DIV : 20 msec
IC701 4 RF
VOLT/DIV : 0.2 V AC
TIME/DIV : 0.5 
µsec
IC701 qg TE
– CD SECTION –
Vp-p (LPC ON)
0.83-0.87
Vp-p (LPC OFF)
0.82-0.88
1
VOLT/DIV : 1 V AC
TIME/DIV : 0.1 
µsec
2
VOLT/DIV : 1 V AC
TIME/DIV : 2 
µsec
1
VOLT/DIV : 50mVAC
TIME/DIV : 5 
µsec
IC802  es
IC802  ud
IC2   w;
– MAIN SECTION (1/2) –
– TUNER SECTION –
390mVp-p
75kHz
1
Q301   C
VOLT/DIV : 1 V AC
TIME/DIV : 5 
µsec
– TC SECTION –
IC701 rk
2 Vp-p
(TAPE, CD mode)
2
T301   1
VOLT/DIV : 10 V AC
TIME/DIV : 5 
µsec
0.6 Vp-p
4.0 Vp-p
33.86 MHz
3.6 Vp-p
4 MHz
3.2 Vp-p
153 kHz
4.6 Vp-p
60 kHz
4.2 Vp-p
60 kHz
38
CFD-G70
SECTION 6
EXPLODED VIEWS
NOTE :
• -XX,  -X mean standardized parts, so they
may have some difference from the original
one.
• Items marked “ * ”are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference
number in the exploded views are not
supplied.
• Hardware (# mark) list and accessories and
packing materials are given in the last of this
parts list.
• Abbreviation
CND : Canadian
MX : Mexican
E4
: 110-120V/220-240V AC changeable
E92 : Central and South America
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
6-1. CABINET (FRONT) ASSY
1
X-3380-605-1 CABINET (FRONT) SUB ASSY
2
3-231-280-01 SHEET (WOOFER.B)
3
X-3380-606-1 COVER ASSY, WOOFER
4
3-231-279-01 SHEET (WOOFER.A)
5
3-231-275-01 WINDOW (LCD)
6
3-230-780-01 BUTTON (PDW)
7
3-230-781-01 BUTTON (FRONT)
8
3-231-254-01 SHEET (DIFFUSION) (PDW)
* 9
1-681-298-11 CONTROL-1 BOARD
10
4-951-620-11 SCREW (2.6X10), +BVTP
11
3-230-787-01 LID, BATTERY CASE
* 12
1-681-299-11 CONTROL-2 BOARD
13
4-951-620-01 SCREW (2.6X8), +BVTP
14
3-831-441-99 CUSHION, STOPPER
* 15
1-681-301-11 HEADPHONE BOARD
16
3-230-779-01 BUTTON (SURROUND)
17
3-231-255-01 SHEET (DIFFUSION) (SURROUND)
* 18
1-757-781-11 CABLE, FLEXIBLE FLAT (9 CORE)
19
3-230-770-01 BUTTON (POWER)
20
X-3380-607-1 BUTTON (TOP) SUB ASSY
21
3-230-769-01 BUTTON (VOLUME)
22
3-921-725-01 SCREW (2.6X10), +PWH
23
3-036-274-01 FOOT, RUBBER
SP391
1-544-790-11 SPEAKER (10cm)
SP392
1-544-790-11 SPEAKER (10cm)
SP393
1-544-791-11 SPEAKER (8cm)
SP394
1-544-792-11 SPEAKER (5cm)
SP395
1-544-792-11 SPEAKER (5cm)
Les composants identifiés par une
marque 0 sont critiquens pour la
sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
6
7
8
9
10
18
17
16
22
15
19
13
21
12
13
13
13
13
13
14
13
1
23
3
5
2
4
13
20
#1
#1
#1
#2
#2
#2
#2
#3
#3
#1
#1
#1
SP393
SP392
SP395
SP391
SP394
not supplied
11
13
23
39
CFD-G70
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
51
3-231-283-01 TERMINAL, ANTENNA
* 52
A-3062-356-A TUNER BOARD, COMPLETE (EXCEPT E4)
* 52
A-3062-468-A TUNER BOARD, COMPLETE (E4)
53
3-230-784-01 CHASSIS (TU)
54
3-230-783-01 CHASSIS (TRANS)
* 55
1-681-302-11 POWER BOARD
* 56
1-681-303-11 AC INLET BOARD
57
X-3380-604-1 HOLDER ASSY, CASSETTE
58
3-230-774-01 LID (CD)
59
1-452-899-11 MAGNET
60
3-231-285-01 SPRING (CASSETTE)
61
3-019-395-01 PLATE, CHUCKING
62
3-231-284-01 SPRING (CD)
63
3-230-776-01 HANDLE
64
3-230-772-01 CABINET (REAR) (US)
64
3-230-772-21 CABINET (REAR) (CND,E92,MX)
64
3-230-772-41 CABINET (REAR) (E4)
* 65
1-681-307-11 BAATT COM BOARD
66
4-960-167-01 SCREW (3X8) (DIA. 10), +WH
* 67
1-681-304-11 BATT BOARD
* 68
1-681-305-11 VOL SEL BOARD (E4)
69
3-831-441-99 CUSHION, SPEAKER GRILLE (FAB-NW)
ANT1
1-501-883-21 ANTENNA, TELESCOPIC
0 F901
1-532-279-00 FUSE T500mA 250V (E4)
0 F902
1-532-350-00 FUSE T4A 250V (E4)
0 F902
1-576-193-11 FUSE 6.3A 125V (EXCEPT E4)
The components identified by
mark  0 or dotted line with
mark 0 are critical for safety.
Replace only with part num-
ber specified.
Les composants identifiés par une
marque  0 sont critiques pour la
sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
58
60
57
59
61
62
63
67
66
65
64
51
68
53
54
52
56
#1
#1
#4
#1
#1
#1
#1
#1
#1
#1
#1
#1
#1
F901
not 
supplied
F902
not 
supplied
E4 Model
E4 Model
ANT1
#5
#1
#1
69
55
6-2. CABINET (REAR) ASSY
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