Sony CFD-E75 Service Manual ▷ View online
16
CFD-E75
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
450 kHz
AM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L4
530 kHz
1.0 ± 0.05 V
Confirmation
1,710 kHz
5.3 ± 0.7 V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3
620 kHz
CT3
1,400 kHz
FM IF ADJUSTMENT
Adjust for a minimum reading on level meter
T2
10.7 MHz
FM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L2
108 MHz
3.0 ± 0.2 V
Confirmation
87.5 MHz
1.3 ± 0.3 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
87.5 MHz
CT1
108 MHz
Adjustment Location: TUNER and POWER board (See page 16)
TUNER SECTION
0 dB=1
µ
V
[AM]
Setting:
Function : RADIO
RADIO BAND button : AM
Function : RADIO
RADIO BAND button : AM
[FM]
Setting:
Function : RADIO
RADIO BAND button: FM
Function : RADIO
RADIO BAND button: FM
• Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally done by the trimmer ca-
pacitors.
pacitors.
• Remove FM antenna in FM adjustment.
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
modulation by
400 Hz signal
Output level:
as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
+
–
–
level meter
set
3.2
Ω
POWER board
CNP392 pin 2
CNP392 pin 2
POWER board
CNP392 pin 1
CNP392 pin 1
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level:
as low as possible
deviation by 400 Hz
signal
Output level:
as low as possible
+
–
–
level meter
POWER board
CNP392 pin 2
CNP392 pin 2
POWER board
CNP392 pin 1
CNP392 pin 1
set
3.2
Ω
0.01
µ
F
TUNER board
TP (GND)
TP (GND)
TUNER board
TP (ANT)
TP (ANT)
digital voltmeter
TP (VT)
TP (GND)
100 k
Ω
TUNER board
17
CFD-E75
Adjustment Location:
TP
(VT)
TP
(GND)
TP
(ANT)
– TUNER BOARD (Component Side) –
– TUNER BOARD (Conductor Side) –
L4
AM VCO Voltage Adjustment
L2
FM VCO Voltage Adjustment
AM Tracking Adjustment
CT3
L3
L3
FM Tracking Adjustment
T1 AM IF Adjustment
T2 FM IF Adjustment
L1
CT1
CT1
– POWER BOARD (Conductor Side) –
1
4
CNP392
18
CFD-E75
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 to TP (RF) and TP (GND) on the CD
board.
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the
3. Press the
[ ]
(CD) 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 (
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)
VOLT/DIV: 0.2 V (with the 10: 1 probe in use.)
TIME/DIV: 500 ns
TIME/DIV: 500 ns
0.85
±
0.2 Vp-p
When observing the eye pattern, set the oscilloscope
for AC range and raise vertical sensitivity.
for AC range and raise vertical sensitivity.
Adjustment Location:
u
IC701
TP (GND)
TP
(RF)
– CD BOARD (Conductor Side) –
CFD-E75
19
19
SECTION 6
DIAGRAMS
6-1.
BLOCK DIAGRAM – CD Section –
A
B
D
13
10
11
13
10
11
F
E
C
I-V AMP
DETECTOR
12
11
17
18
26
SL+
SL–
F–
F+
T+
T–
SPINDLE
MOTOR DRIVE
M701
(SPINDLE)
S701
(LIMIT)
SLED
MOTOR DRIVE
27
M702
(SLED)
FOCUS
COIL DRIVE
TRACKING
COIL DRIVE
SP+
SP–
3
25
9
19
FIN
TIN
SLIN
SPIN
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC702
LD
PD
LASER DIODE
OPTICAL PICK-UP
BLOCK
(KSS-213C)
2-AXIS
DEVICE
(FOCUS)
(TRACKING)
2
1
9
14
9
14
7
5
7
5
3
2
3
2
4
1
4
1
2
2
CNP701
M
M
7
MUTE
AUTOMATIC
POWER
CONTROL
Q701
8
FIN2
7
FIN1
+
MIX
4
RF
LPF
EQ
PH
BH
10
TIN1
9
TIN1
A/D
SW
LPF
TRACK
JUMP
TBAL
80
LDD
APC
AUDIO
ADJUST
SERVO
PROCESSOR
RUPTURE
DETECT
79
LDS
SW
AGC
D/A
13
FE
15
TE
20
TDO
21
FDO
23
SLDO
22
SPDO
S/H
3
EFM
IN
IN
SLISE LEVEL
CONTROL
ERROR
CORRECTION
AUDIO CD
C1 – 2, C2 – 2
RAM
8FS
DIGITAL
FILTER
INTERPOLATION
MUTE
ATTENUATION
DEEMPHASIS
1 BIT
DAC
42
LCHO
45
RCHO
LPF
39
DOUT
AUDIO
OUT
FSEQ
PLL
VCEC
CLV, CAV
CONTROL
FRAME SYNC
DETECT,
PROTECT INSERT,
EFM DECODE
31
RAM
DRF
67
48
49
25
CONT4
72
CONT1
66
*
RES
61
CE
62
CL
63
DI
64
DO
65
*
WRQ
RF AMP, FOCUS/TRACKING SERVO,
DIGITAL SIGNAL PROCESSOR,
CLV SERVO, D/A CONVERTER
IC701
5
9
7
3
4
6
10
12
1 CD-WRQ
8 CD DO
9 CD DI
7 CD CL
6 CD CE
5 CD-RES
8
10 CD DRF
11 CD FSEQ
*
WRQ
DO
DI
CL
CE
*
RES
DRF
FSEQ
5
9
7
3
4
6
10
12
8
CD L-OUT
CNP702
CNP323
20
CD DOOR
1
2
CNP801
S901
3
CNP322
(1/4)
TO MAIN
SECTION
SECTION
(Page 21)
A
SYSTEM
CONTROLLER
IC801
(1/3)
MAIN
BOARD
(1/4)
CD BOARD
R-CH
: CD PLAY
•
R-ch is omitted due to same as L-ch.
•
SIGNAL PATH
GENERAL-PURPOSE
PORTS
COMMAND
INTERFACE
INTERFACE
DRF
XOUT
XIN
X701
33.8688MHz
Z
PUSH OPEN/CLOSE
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