Sony CFD-G70L Service Manual ▷ View online
16
CFD-G70L
Adjustment Location :
TUNER BOARD
(Component side)
CT1: FM Tracking Adjustment
L1: FM Tracking Adjustment
L3: MW Tracking Adjustment
CT3: MW Tracking Adjustment
CT5: LW Tracking Adjustment
CNP1
L4: LW Frequency Coverage Adjustment
T1: MW IF Adjustment
L3: LW Tracking Adjustment
T2: FM IF Adjustment
L2: FM Frequency Coverage Adjustment
17
CFD-G70L
SECTION 5
DIAGRAMS
5-1. EXPLANATION OF IC TERMINALS
IC802 CXP83620-031Q SYSTEM CONTROL
1
WRQ
I
CD subcorde Q signal input
2
RMC
I
Remote control signal input
3
R-MUTE
O
Radio mute signal output
4
ADJ
O
DC 1.7 V output for beep signal (Not used)
5
C-FSEQ
I
CD FSEQ signal input
6
C-CE
O
CD chip select signal output
7
C-CL
O
CD clock signal output
8
C-DO
I
CD serial data signal input
9
C-DI
O
CD serial data signal output
10
C-DRF
I
CD DRF signal input
11
C-RES
O
CD reset signal output
12
NC
—
Not used
13
SUR ON/OFF
O
Surround ON/OFF signal output
14
R-COUNT
I
Radio count signal input
15
R-CLOCK
O
Radio control clock signal output
16
R-DATA
O
Radio control data signal output
17
R-CE
O
Radio latch signal output
18
V-LATCH
O
Data latch signal output to LC75342 (VOL IC)
19
V-DATA
O
Data signal output to LC75342 (VOL IC)
20
V-CLOCK
O
Clock signal output to LC75342 (VOL IC)
21
P-CON
O
Power control signal output
22
REG CHK
I
Regulator voltage check signal input
23
REC
I
Tape recording function signal input
24
SDA
I/O
EEPROM serial data in/out
25 – 27
KEY-1 – 3
I
Key input terminal of A/D port
28
LIGHT CONT
O
Woofer monitor LED ON/OFF signal output
29
MODE CHECK
I
Reading specification and MEGA BASS signal input terminal (A/D port)
30
RST
I
System reset signal input
31
EXTAL
I
Crystal oscillator terminal (4.0MHz)
32
XTAL
O
Crystal oscillator terminal (4.0MHz)
33
VSS
—
Ground terminal
34
VL
O
LCD bias control signal output
35
VLC3
—
LCD bias voltage terminal
36
VLC2
—
LCD bias voltage terminal
37
VLC1
—
LCD bias voltage terminal
38 – 41
COM0 – 3
O
LCD common signal output
42 – 59
SEG0 – 17
O
LCD segment signal output
60, 61
NC
—
Not used
62
INIT
O
Initial signal output
63, 64
WOOFER2, 1
O
Woofer function signal output
65
VM
O
Battery check signal output
66
VH
O
TAPE deck motor control signal output
67, 68
ISS1, 2
O
ISS select signal output
69
TAPE
O
TAPE function signal output
70
RADIO
O
Radio function signal output
Pin No.
Pin name
I/O
Description
18
CFD-G70L
AC inlet board
TC board
BATT board
MAIN board
BATT COM board
CD board
TUNER board
CONTROL-2 board
CONTROL-1 board
HEADPHONE board
LCD board
POWER board
• Circuit Boards Location
Pin No.
Pin name
I/O
Description
71
CD
O
CD function signal output
72
VDD
—
Power supply terminal
73
TX
O
Crystal oscillator terminal (153kHz)
74
TEX
I
Crystal oscillator terminal (153kHz)
75
NC
—
Not used (Open)
76
A-MUTE
O
Audio mute signal output
77
SCL
O
EEPROM clock signal output
78
EC
I
Connect to ADJ (pin 4)
79
TC-PLAY
I
Tape play switch (S321) input
80
CD DOOR
I
Door open/close switch (S701) input
CFD-G70L
19
19
• Signal path.
F
: FM
f
: AM
a
: REC
E
: PB
5-2. BLOCK DIAGRAM – TUNER/TC SECTION –
L4
CF2
CF4
X1
ANT1
CT3
CT1
T301
T2
L1
L2
D1
D2
D3
T1
Q805
CT5
Q43
Q41
Q42
Q14
Q44
Q302
Q303
Q12
75KHz
FM
TELESCOPIC
ANTENNA
IF-IN
LPF2
/MO-ST
IF-IN
OSC-OUT
FM OSC
L-OUT
R-OUT
CE
DI
CL
DO
BAND
ST-IND
IF IN
XOUT
XIN
LP-OUT
LP-IN
PD
MO/ST
FM IN
AM IN
FM
RF-IN
RF-IN
MIX-OUT
AM
FM
QUAD
LPF1
/BAND
MPX-IN
DET-OUT
IF-OUT
ST-IND
AM OSC
AM
RF-IN
RF-IN
FM
RF-OUT
RF-OUT
DET,FM MPX
FRONT-END,IF AMP,
+
IC1
FM/AM
TU+6V
TU+6V
+
FERRITE-ROD
ANTENNA
L3
R-COUNT
R-DATA
R-CLOCK
RADIO
R-CE
REC
REC-MUTE
SYSTEM CONTROL
B+
SWITCH
PREOUT-L
LINE-L
L.IN
REF
REC
LINE
TAPE
REC/PB PRE AMP
HEAD
RECORD/
PLAYBACK
R-CH
L-CH
ERASE
HEAD
HRP301
HE301
ALC 2
DET
-1
-2
REC
PB
IC301
TU-L
PLL
IC2
AUDIO+6V
TU+6V
S301
(REC/PB)
AUDIO+6V
VT
VT
TU+6V
Q803,804
TAPE
R MUTE
L.LO
R.LO
L.RO
L.LIN
L.LIN
L.RAD
R MUTE
IC802(1/3)
BAND
/LW
MW
MW
ISS1
ISS2
AM IF
FM
TRACKING
CT1,L1
FREQUENCY
COVERAGE
FREQUENCY
COVERAGE
L4
TRACKING
L3,CT3
MPX
FM
OSC
OSC
AM
FM
FRONT-END
FRONT-END
AM
AM DET
FM DET
BIAS OSC
Q301
R-CH
R-CH
FM IF
R-CH
FM
L2
(FM OSC)
(FM RF)
TU+6V
AM
TU+6V
TU+6V
REG
Q61
Q61
TRACKING
LW
L3,CT5
MW
TU+6V
LW
MAIN
SECTION
MAIN
SECTION
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