Sony CFD-S39 Service Manual ▷ View online
– 13 –
2
jack (J301)
set
32
Ω
test tape
WS-48A
(3 kHz, 0 dB)
WS-48A
(3 kHz, 0 dB)
digital frequency
counter
counter
Tape speed adjustment
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
Forward
CQ-102C
25 – 60 g • cm
(0.35 – 0.83 oz • inch)
Forward
CQ-102C
1 – 5 g • cm
back tension
(0.014 – 0.069 oz • inch)
Reverse
CQ-102RC
25 – 60 g • cm
(0.35 – 0.83 oz • inch)
Reverse
CQ-102RC
1 – 5 g • cm
back tension
(0.014 – 0.069 oz • inch)
Fast
CQ-201B
55 – 140 g • cm
Forward
(0.76 – 1.94 oz • inch)
Rewind
CQ-201B
55 – 140 g • cm
(0.76 – 1.94 oz • inch)
Tape Tension Measurement
Mode
Tension Meter
Meter Reading
Forward
CQ-403A
more than 170 g
Reverse
CQ-403R
(more than 6.00 oz)
SECTION 5
ELECTRICAL ADJUSTMENTS
SECTION 4
MECHANICAL ADJUSTMENTS
1. Playback the test tape in the FWD playback mode.
2. Confirm that the digital frequency counter reading indicates a
2. Confirm that the digital frequency counter reading indicates a
value in the range of 2,940 to 3,060 Hz at tape top.
3. If the specification is not satisfied, adjust variable resistor of
motor until the frequency counter reading is as close to 3,000
Hz as possible at the FWD tape top.
Specification : 2,910 to 3,090 Hz
Hz as possible at the FWD tape top.
Specification : 2,910 to 3,090 Hz
4. Frequency difference between the beginning and the end of the
tape should be within 1.5% (45 Hz).
Adjustment Location:
– 14 –
2
jack (J301)
set
32
Ω
level meter
(range: 0.5–5 V ac)
(range: 0.5–5 V ac)
3.0
±
1.0 mm
L3
AM
FERRITE-ROD
ANTENNA
AM
FERRITE-ROD
ANTENNA
digital
voltmeter
voltmeter
100 k
Ω
TP (VT)
(JW17)
(JW17)
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
AM RF signal
generator
generator
TP (FM ANT)
FM RF signal
generator
generator
0.01
µ
F
set
FM FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display
87.5 MHz
108 MHz
Reading on Digital voltmeter
1.6 ± 0.4 V
4.3 ± 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
CHECK
Frequency Display
530 kHz
1,710 kHz
Reading on Digital voltmeter
1.0
+ 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.
TUNER SECTION 0 dB = 1 µV
• FM Section
Setting:
RADIO (BAND) button: FM
RADIO (BAND) button: 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:
RADIO (BAND) button: AM
RADIO (BAND) button: 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.
Adjustment Location: See page 15.
– 15 –
TP (RFO)
– main board (conductor side) –
RF level :
1.2
1.2
±
0.1 Vp-p
VOLT/DIV : 200 mV (10 : 1 probe in use)
TIME/DIV : 500 nS
TIME/DIV : 500 nS
CT3
TP (VT)
(JW17)
TP
(FM ANT)
AM
TRACKING
ADJUSTMENT
L4
CT1
L1
FM
TRACKING
ADJUSTMENT
L2
FM
FREQUENCY
COVERAGE
ADJUSTMENT
– tuner board (component side) –
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 CD
3. Press the CD
fl 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)
π
Test Point:
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.
and raise vertical sensitivity.
– 16 –
6-1. IC PIN DESCRIPTION
• IC501 CXP83620-007Q (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
C-SCOR
I
CD SCOR input
2
RMC
I
Sircs receiver input
3, 4
NC
—
Not used.
5
C-SENS1
I
CD SENSE-1 input
6
C-SENS2
I
CD SENSE-2 input
7
C-SQCK
O
CD Sub-Q read clock output
8
C-SQSO
I
CD Sub-Q data input
9
C-RST
O
CD reset output
10
C-CLOCK
O
CD serial clock output
11
C-LATCH
O
CD serial latch output
12
C-DATA
O
CD serial data output
13
REC
I
Tape record signal input L: REC
14
R-COUNT
I
Tuner PLL data input
15
R-DATA
O
Tuner PLL data output
16
R-CLOCK
O
Tuner PLL clock output
17
R-LATCH
O
Tuner PLL latch output
18
V-LATCH
O
Volume latch output
19
V-DATA
O
Volume data output
20
V-CLOCK
O
Volume clock output
21
P-CON
O
System power control output
22
DIRECTION
I
Tape pass direction or direction change input
23 – 25
KEY-1 – 3
I
Key input
26
NC
—
Not used.
27
INIT
O
Initial set signal output
28
MODE CHECK
I
Mode set pin
29
SHIFT CLOCK
O
Shift clock output
30
RST
I
System reset input
31
EXTAL
I
Oscillation input (4.19 MHz)
32
XTAL
O
Oscillation output (4.19 MHz)
33
VSS
—
GND
34
VL
O
LCD drive port ON/OFF output
35 – 37
VLC-3 – 1
O
LCD drive voltage terminal
38 – 41
COM0 – 3
O
LCD drive common output
42 – 64
SEG0 – 22
O
LCD drive segment output
65
NC
—
Not used.
66
A-MUTE
O
Audio mute output H: Mute
67
B-MUTE
O
Tuner block mute output H: Mute
68
C-MUTE
O
CD block mute output H: Mute
69
TAPE
O
Tape function output H: Tape
70
RADIO
O
Tuner function output H: Radio
71
CD
O
CD function output L: CD
72
VDD
—
Power supply pin (+5 V)
73
TX
O
Oscillation output (32.768 kHz)
74
TEX
I
Oscillation input (32.768 kHz)
75
NC
—
Not used.
76
ISS1
O
Not used.
77
ISS2
O
Not used.
78
C-DOOR
I
CD door open/close switch input L: Close
79
TC-PLAY
I
Tape play switch input L: Tape
80
REG CHK
I
Regulator check signal input H: ON
SECTION 6
DIAGRAMS
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