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Model
CFD-S700
Pages
47
Size
4.12 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cfd-s700.pdf
Date

Sony CFD-S700 Service Manual ▷ View online

14
CFD-S700
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2
10.7 MHz
FM FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display
87.5 MHz
108 MHz
Reading on Digital voltmeter
1.3 ± 0.3 V
3.0 ± 0.2 V
Adjustment Part
<confirmation>
L2
FM TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
CT1
87.5 MHz
108 MHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450 kHz
AM FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display
530 kHz
1,710 kHz
Reading on Digital voltmeter
1.0 ± 0.1 V
5.3 ± 0.7 V
Adjustment Part
L4
<confirmation>
AM TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
CT3
620 kHz
1,400 kHz
digital
voltmeter
100 k
TP (VT)
i
 jack (J321)
set
32 
level meter
(range: 0.5–5 V ac)
Put the lead-wire
antenna close to
the set.
AM RF signal
generator
  TUNER SECTION     0 dB = 1 µV
• FM Section
Setting:
RADIO (BAND) button: FM
75 kHz frequency
deviation by 1 kHz signal
output level : as low as possible
• AM Section
Setting:
RADIO (BAND) button: AM
30% amplitude
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.
Adjustment Location: 
See page 15.
TP (JW1)
FM RF signal
generator
0.01 
µ
F
set
15
CFD-S700
TP
(RF)
TP
(FE)
TP
(TE)
TP
(VREF)
TP
(RF)
TP
(VREF)
– CD board (conductor side) –
Adjustment Location:
  CD SECTION
CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
Focus Bias Check
1. Connect the oscilloscope between IC701 pin 4 and pin qa (or
TP (RF) and TP (VREF).
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the CD N X 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.
• RF signal reference waveform (eye pattern)
Test Point:
RF level :
0.85 
±
 0.2 Vp-p
VOLT/DIV : 50 mV (10 : 1 probe in use)
TIME/DIV : 500 nS
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.
– MAIN board (component side) –
T2
FM IF
ADJUSTMENT
T2
L2
TP(JW1)
T1
AM IF
ADJUSTMENT
T1
L4
L3
CT1
CT3
L1
L2
FM  FREQUENCY
COVERAGE
ADJUSTMENT
CT1, L1
FM  TRACKING
ADJUSTMENT
L4
AM
FREQUENCY
COVERAGE
ADJUSTMENT
CT3, L3
AM
TRACKING
ADJUSTMENT
16
CFD-S700
6-1. IC Pin Description
• IC802  uPD789477GC-A06-8BT (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Pin Description
1, 2
NC
Not used. (Open)
3 – 5
VLC2 – 0
O
LCD drive voltage output
6 – 9
COM0 – 3
O
LCD drive common output
10 – 26
S0 – 16
O
LCD drive segment output
27 – 29
S17 – 19
O
LCD drive segment output     Not used. (Open)
30
BL-CONT
Not used. (Open)
31
A-MUTE
O
Audio mute output    H: Mute
32
WB/FM.AM.TV
O
Tuner output level attenuator switch     Not used. (Open)
33
DBB
O
MEGA BASS control output     H: MEGA BASS off, L: MEGA BASS on
34
P-CON
O
System power control output     H: PCON
35
AC-CHK
I
AC power supply detection signal input  “L”: AC in
36
CD
O
CD function output    H: CD
37
TAPE
O
Tape function output    H: Tape
38
AVDD
Analog power supply pin for A/D converter (+3.3 V)
39
BTT-CHK-H
I
Battery check input for Hi-voltage
40
BTT-CHK-M
I
Battery check input for Mid-voltage
41
REC
I
Tape record signal input    H: REC
42 – 45
KEY1 – 4
I
Key input
46
MODE CHK
I
Mode set input
47
AGND
Analog GND for A/D converter
48
REMOTE
I
Sircs receiver data input
49
TC-PLAY
I
Tape play switch input    L: Tape
50
WP/INI
O
Initial set signal output
51
CD-DOOR
I
CD door open/close switch input    L: Close
52
C-WRQ
I
CD command data input
53
C-DOUT
I
CD sireal data input
54
C-DIN
O
CD sireal data output
55
C-CLK
I
Serial data transfer clock signal input
56
R-COUNT
I
Tuner PLL data input
57
R-DATA
O
Tuner PLL data output
58
R-CLK
O
Tuner PLL clock output
59
R-LAT
O
Tuner PLL latch output
60
B-MUTE
O
Tuner mute signal output     H: Mute
61
C-DRF
I
CD DRF signal input
62
C-CE
O
CD  SENSE read clock output
63
C-FSEQ
I
CD frame SYNC input
64
C-XRT
O
CD system reset output
65
V-LAT
O
Volume latch output     Not used. (Open)
66
V-DATA
O
Volume data output
67
V-CLK
O
Volume clock output
68
SUR
O
Surround switch signal output
69
ICO
Connected to GND
70
XT1
I
Sub system oscillation input (32.768 kHz)
71
XT2
O
Sub system oscillation output (32.768 kHz)
72
VDD
Main power supply pin for A/D converter (+3.3 V)
73
VSS
Main GND
74
X1
I
Main system oscillation input (4.19 MHz)
SECTION 6
DIAGRAMS
CFD-S700
17
17
Pin No.
Pin Name
I/O
Pin Description
75
X2
O
Main system oscillation output (4.19 MHz)
76
RST
I
System reset input
77
ISS1
O
ISS1 output     Not used. (Open)
78
ISS2
O
ISS2 output     Not used. (Open)
79
SCL
O
EEPROM clock output
80
SDA
I/O
EEPROM input/output
6-2. Circuit Boards Location
CONTROL (1) board
CONTROL (2) board
CONTROL (3) board
CD board
BATTERY (2) board
BATTERY (1) board
POWER AMP board
MAIN board
PRE board
POWER board
SELECTION board
INLET board
Ver 1.1  2003.03
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