Sony CFD-44 Service Manual ▷ View online
– 13 –
Procedure :
1. Keep the set horizontal.
If the set is not horizontal, this adjustment cannot be
performed due to the gravity against the 2-axis device.
performed due to the gravity against the 2-axis device.
2. Insert disc (YEDS-18) and press CD PLAY
· button.
3. Connect oscilloscope to TP(FO) and TP (VC) on CD MAIN
board.
4. Adjustment RV702 on CD MAIN board so that the waveform is
as shown in the figure below. (focus gain adjustment)
5. Connect oscilloscope to TP(TO) and TP(VC) on CD MAIN
board.
6. Adjust RV704 on digital board so that the waveform is as shown
in the figure below. (Tracking Gain Adjustment)
7. Release test mode after adjustment is completed.
Adjustment Location : CD Main board (See page 14)
+
–
OSCILLOSCOPE
(DC range)
(DC range)
TP (FO)
TP (TO)
TP (TC)
[CD MAIN BOARD] – Component side –
– 14 –
Adjustment Location : Main board (Component side)
CFT1 : AM IF Adjustment
L1 : FM Tracking Adjustment
L2 : FM Frequency Coverage Adjustment
L3 : AM Tracking Adjustment
L4 : AM Frequency Coverage Adjustment
CT1 : FM Tracking Adjustment
CT2 : AM Tracking Adjustment
Telescopic Antenna
Adjustment Location : CD Main board (Component side)
CN701
RV701 : Focus Bias Adjustment
RV703 : E-F Balance Adjustment
RV704 : Tracking Gain Adjustment
RV702 : Focus Gain Adjustment
– 15 –
SECTION 5
EXPLANATION OF IC TERMINALS
IC611 MSM65353-024GS-BK4
1-4
COM 1-4
O
LCD common output.
5-25
SEG 0-20
O
LCD segment output.
26
SEG 21
O
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
27
SEG 22
O
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
28
–––––––––
–
Not used. (Open)
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
29
NC
–
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
30
NC
–
31-36
–––––––––
–
Not used. (Open)
37
A-GND
–
Analog ground.
38-41
KEY 1-4
I
Key input.
42
9/10
I
9k/10k switching detection.
43
–––––––––
–
Not used. (Ground)
44
J/L/S
I
Destination selection input.
45
–––––––––
I
Not used. (Ground)
46
VRH
I
Power supply (+5V) for A/D conveter reference voltage.
47
AV
DD
I
Power supply. (+5V)
48
INI
O
Initial output.
49
ROM-DAT
I/0
Data input/ output to IC612 (EEPROM).
50
ROM-CLK
O
Clock output to IC612 (EEPROM).
51
ROM-CE
O
Chip enable output to IC612 (EEPROM).
52
R-ST
I
Stereo signal input. (RADIO)
53
R-MUTE
O
Mute output for RADIO
54
R-CE
O
Chip enable output to IC3 (PLL).
55
TAPE
O
Function select signal. (TAPE)
56
MONO/ST
I
MONO/ST input.
57
NC
–
Not used. (Open)
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
58
NC
–
59
C-SENCE
I
SENS input from IC702 (DSP).
60
C-XRST
O
System reset output to IC702(DSP).
61
C-DATE
O
Data output to IC (DSP).
62
C-XLAT
O
Latch output to IC702 (DSP).
63
C-CLK
O
Clock output to IC702 (DSP).
64
C-MUTE
O
CD mute output.
65
C-SQSO
I
Sub-code Q data input.
66
C-SQCK
O
Sub-code Q data reading clock output.
67
RMC
I
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
68
NC
–
Not used. (Open)
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
69
–––––––––
–
Pin No.
Pin name
I/O
Description
– 16 –
Pin No.
Pin name
I/O
Description
70
B/L-CONT
O
Back light control output.
71
A-MUTE
O
Audio mute output.
72
V
DD
–
Power supply. (+5V)
73
REC
I
REC input. “H” : REC, “L” : PB
74
FWD/RVS
I
FWD/RVS input.
75
RADIO
O
Function select signal. (RADIO)
76
C-SCOR
I
SCOR input from IC702 (DSP).
77
CD
O
Function select signal. (CD)
78
PCON
O
Power ON/OFF control.
79
REG OFF
I
Regulator OFF detect.
80
TC-PLAY
I
TAPE play detect.
––––––––––––
81
OSC 1
O
Main clock output. (4.19MHz)
82
OSC 0
I
Main clock input. (4.19MHz)
83
D-GND
–
Digital ground.
84
TX
I
Input clock for TUNER. (32,768kHz)
––––––
85
TX
O
Output clock for TUNER. (32,768kHz)
86
CLOSE-O
O
Loading motor (M703) control output. (Close)
87
OPEN-O
O
Loading motor (M703) control output. (Open)
88
CLOSE-I
I
CD tray IN detector input.
89
OPEN-I
I
CD tray OUT detector input.
90
REG CHK
I
Regulator check input.
91
R-DATA O
O
Data output to IC3 (PLL).
92
R-CONT
I
Data input from IC3 (PLL).
93
R-CLK
O
Clock output to IC3 (PLL).
–––––––––
94
RST
I
System reset input.
95
GND
–
Ground.
96
NC
–
Not used. (Open)
97
VDDL
I
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
98
V
DD
1
I
LCD driving output.
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
99
V
DD
2
I
100
V
DD
3
I
LCD driving output.
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