Sony CFD-S47 Service Manual ▷ View online
– 13 –
phones jack
set
32
Ω
test tape
WS-48A
(3 kHz, 0 dB)
WS-48A
(3 kHz, 0 dB)
digital frequency
counter
counter
TAPE SECTION 0 dB = 0.775 V
• Standard Output Level
Output terminal
HP OUT
load impedance
32 Ω
output signal level
0.25 V (–10 dB)
• Test Tape
Type
Signal
Used for
WS-48A
3 kHz, 0 dB
tape speed adjustment
Tape Speed Adjustment
Procedure:
Mode: playback
Mode: playback
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head
pinch roller
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head demagne-
tizer. (Do not bring the head magnetizer close to the erase head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Measurement
Mode
Torque meter
Meter reading
FWD
CQ-102C
30 – 70 g • cm
(0.42 – 0.97 oz • inch)
FWD
CQ-102C
1.5 – 5.5 g • cm
Back Tension
(0.021 – 0.076 oz • inch)
FF
CQ-201B
more than 60 g • cm
(more than 0.83 oz • inch)
REW
CQ-201B
more than 60 g • cm
(more than 0.83 oz • inch)
Tape Tension Measurement
Mode
Tension meter
Meter Reading
FWD
CQ-403A
more than 100 g
(more than 3.53 oz)
SECTION 4
ELECTRICAL ADJUSTMENTS
SECTION 3
MECHANICAL ADJUSTMENTS
Adjust so that the value on the frequency counter is 3 kHz.
Specification Value:
Digital frequency counter
2,985 to 3,015 Hz
Adjust so that the frequency at the beginning and that at the end of
tape winding are between 2,955 to 3,045 Hz.
tape winding are between 2,955 to 3,045 Hz.
Adjustment Location:
Tape speed adjustment
control inside motor
control inside motor
– 14 –
FM FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display
87.5 MHz
108 MHz
Reading on Digital voltmeter
1.7 ± 0.4 V
4.1 ± 0.1V
Adjustment Part
<confirmation>
L2
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
CT1
87.5 MHz
108 MHz
AM FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display
530 kHz
1,710 kHz
Reading on Digital voltmeter
0.9
+ 0.7 V
4.8
+ 1.2V
– 0.5 V
– 0.6 V
Adjustment Part
<confirmation> <confirmation>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
CT3
620 kHz
1,400 kHz
• For AM adjustment, fix the ferrite-rod antenna (L3) as shown
below and then perform tracking adjustment at L4 and CT3.
Lastly check the voltage.
Lastly check the voltage.
digital
voltmeter
voltmeter
100 k
Ω
TP (VT)
(JW18)
(JW18)
phones jack
set
32
Ω
level meter
(range: 0.5–5 V ac)
(range: 0.5–5 V ac)
Put the lead-wire
antenna close to
the supplied AM
loop antenna.
antenna close to
the supplied AM
loop antenna.
AM RF signal
generator
generator
TP (FM ANT)
FM RF signal
generator
generator
0.01
µ
F
set
TUNER SECTION 0 dB = 1 µV
• FM Section
Setting:
BAND switch: FM
BAND switch: FM
75 kHz frequency
deviation by 1 kHz signal
output level : as low as possible
deviation by 1 kHz signal
output level : as low as possible
• AM Section
Setting:
BAND switch: AM
BAND switch: AM
30% amplitude
modulation by
400 Hz signal
modulation by
400 Hz signal
• Connecting Level Meter (FM and AM)
• Connecting Digital Voltmeter (FM and AM)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
3.0
±
1.0 mm
L3
FERRITE-ROD
ANTENNA
FERRITE-ROD
ANTENNA
Adjustment Location: See page 15.
– 15 –
Adjustment Location:
CD SECTION
CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
In case of operation check, confirm that focus bias.
FOCUS BIAS CHECK
1. Connect the oscilloscope between IC701 pin #£ (TP RFO) and
GND on CD board.
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the
3. Press the
^ button.
4. Confirm that the oscilloscope waveform is as shown in the
figure below. (eye pattern)
A good eye pattern means that the diamond shape ( ) in the
center of the waveform can be clearly distinguished.
A good eye pattern means that the diamond shape ( ) in the
center of the waveform can be clearly distinguished.
• RF signal reference waveform (eye pattern)
L3
CT3
TP (VT)
(JW18)
TP
(FM ANT)
(CN4)
AM
TRACKING
ADJUSTMENT
L4
CT1
L1
FM
TRACKING
ADJUSTMENT
L2
FM
FREQUENCY
COVERAGE
ADJUSTMENT
– tuner board (component side) –
π
Test Point:
RF level :
1.3
1.3
±
0.5 Vp-p
VOLT/DIV : 200 mV (10 : 1 probe in use)
TIME/DIV : 500 nS
TIME/DIV : 500 nS
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.
and raise vertical sensitivity.
TP (RFO)
– CD board (conductor side) –
TP (RFO)
– 16 –
5-1. IC PIN DESCRIPTION
• IC501 CXP83120A-035Q (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
C-SCOR
I
CD SCOR input
2
WP
I
Wake-up input
3
RMC
I
Sircs receiver input
4
CLOSE-O
O
CD loading motor control output (Loading direction)
5
OPEN-O
O
CD loading motor control output (Eject direction)
6
OPEN-I
I
CD open switch input
7
CLOSE-I
I
CD close switch input
8
NC
—
Not used.
9
C-SENS1
I
CD SENSE-1 input
10
C-SENS2
I
CD SENSE-2 input
11
C-SQCK
O
CD Sub-Q read clock output
12
C-SQSO
I
CD Sub-Q data input
13
NC
—
Not used.
14
C-XRST
O
CD reset output
15
C-XLT
O
CD serial latch output
16
C-CLK
O
CD serial clock output
17
C-DATA
O
CD serial data output
18
R-ST
O
Stereo ingicator output
19
R-DATA
O
Tuner PLL data output
20
R-CLK
O
Tuner PLL clock output
21
R-COUNT
I
Tuner PLL data input
22
R-CE
O
Tuner PLL chip enable output
23
PCON
O
System power control output
24
V-DATA
O
Volume serial data output
25
V-CLK
O
Volume serial clock output
26
V-CE
O
Volume serial chip enable output
27
REG-CHK
I
Low voltage detection input
28
B/L-CONT
O
Back light control output
29
REC
I
Tape record signal input
30
INI
O
Tuner select initial setting output
31
LOCAL/DX
I
Input port for ANT sensitivity switching control on FM. (However, the LOCAL/DX
function is finally deleted so it is not used.)
32
VERSION
I
Tuner destination band select input
33 – 36
KEY-1 – 4
I
Key input
37
S-CLK
O
Shift clock output
38
RST
I
System reset input
39
EXTAL
I
Oscillation input (4.19 MHz)
40
XTAL
O
Oscillation output (4.19 MHz)
41
VSS
—
GND
42
NC
—
Not used.
43
VSS
—
GND
44
AVREF
I
A/D converter VREF input
45
AVSS
—
Analog GND
46
VL
O
LCD drive port ON/OFF output
47 – 49
VLC-3 – 1
O
LCD drive voltege terminal
50 – 53
COM0 – 3
O
LCD drive common output
54 – 76
SEG0 – 22
O
LCD drive segment output
77 – 79
—
—
Not used.
80
F-TAPE
O
Tape power select control output
81
F-TU
O
Tuner power select control output
82
F-CD
O
CD power select control output
SECTION 5
DIAGRAMS
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