Sony ICF-CD7000 Service Manual ▷ View online
13
ICF-CD7000
Adjustment and Connecting Location:
– TU BOARD (Component Side) –
– TU BOARD (Conductor Side) –
– AMP BOARD (Conductor Side) –
L4
AM VCO Voltage Adjustment
L2
FM VCO Voltage Adjustment
FM Tracking Adjustment
T1 AM IF Adjustment
T2 FM IF Adjustment
L1
CT1
CT1
AM Tracking Adjustment
L3
CT3
CT3
TP (VT)
TP (GND)
TP (ANT)
CN353
1
4
14
ICF-CD7000
CD SECTION
Perform all CD section check in the test mode.
FOCUS BIAS CHECK
Procedure:
1. Connect the oscilloscope to TP (RF) and TP (VREF) on the
1. Connect the oscilloscope to TP (RF) and TP (VREF) on the
CD board.
2. Insert the test disc (PATD-012). (Part No. 4-225-203-01) (CD)
3. While playing the CD, set the CD test mode (Refer to CD
3. While playing the CD, set the CD test mode (Refer to CD
TEST MODE (See page 11)) (Automatic adjustment value is
held at this time).
held at this time).
4. Set the FOCUS 2 MODE.
5. Confirm that the oscilloscope waveform is as shown in the
5. 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.
6. Release the CD test mode.
7. Change the test disc (TCD-W082L). (Part No. J-2502-063-2)
7. Change the test disc (TCD-W082L). (Part No. J-2502-063-2)
(CD-RW)
8. Perform confirmation in the same manner as step 3 to 6.
• RF signal reference waveform (eye pattern)
Connecting Location:
VOLT/DIV: 0.2 V (with the 10: 1 probe in use.)
TIME/DIV: 500 ns
TIME/DIV: 500 ns
CD:
1.0 to 1.6 Vp-p
CD-RW:
1.2
1.0 to 1.6 Vp-p
CD-RW:
1.2
±
1.8 Vp-p
When observing the eye pattern, set the oscilloscope
for AC range and raise vertical sensitivity.
for AC range and raise vertical sensitivity.
– CD BOARD (Conductor Side) –
IC701
TP (RF)
TP (VREF)
ICF-CD7000
15
15
ICF-CD7000
•
Circuit Boards Location
•
Note For Printed Wiring Boards and Schematic Diagrams
Note on Schematic Diagram:
•
All capacitors are in
µ
F unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
•
All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
•
H
: adjustment for repair.
•
Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
under no-signal (detuned) conditions.
– CD Board –
no mark : CD PLAY
– TU Board –
no mark : FM
(
(
) : AM
– Other Boards –
no mark: FM
(
(
) : CD PLAY
•
Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
•
Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
Voltage variations may be noted due to normal produc-
tion tolerances.
•
Circled numbers refer to waveforms.
•
Signal path.
F
: FM
f
: AM
J
: CD PLAY
i
: AUDIO IN
•
Abbreviation
CND : Canadian model
IT
CND : Canadian model
IT
: Italian model
RU
: Russian model
Note on Printed Wiring Board:
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
W
: indicates side identified with part number.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
SECTION 6
DIAGRAMS
The components identified by
mark 0 or dotted line with
mark 0 are critical for safety.
Replace only with part number
specified.
mark 0 or dotted line with
mark 0 are critical for safety.
Replace only with part number
specified.
Les composants identifiés par une
marque 0 sont critiques pour la
sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
marque 0 sont critiques pour la
sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
RELAY board
CD board
KEY (L) board
KEY (R) board
ILLUMINATION board
MAIN board
VOL board
BUZZER board
CLOCK board
TU board
AMP board
Ver. 1.2
ICF-CD7000
16
16
ICF-CD7000
6-1. PRINTED WIRING BOARDS – CD Section –
•
See page 15 for Circuit Boards Location.
: Uses unleaded solder.
C769
C768
C710
C715
IC781
IC701
JW720
JW717
JW715
JW711
JW710
JW708
JW707
JW712
JW701
JW702
JW704
JW705
JW706
JW713
JW719
JW726
JW727
JW728
JW729
JW718
JW714
JW730
JW725
CNP702
JW724
C738
C743
C744
C752
C753
C783
C713
C711
C714
C760
C762
C758
C757
C761
C712
C782
C706
C708
JW723
C767
C766
JW722
X701
Q701
R762
R759
R760
R786
R727
R714 R718
R717
R716
R705
R712
R713
R706
R723
R722
C717
C716
R724
R725
R726
C723
C719
C718
C722
R763
C754
R755
R756
C745
C742
R754
R753
C739
FB702
R788
R781
C781
R737
R739
R709
R711
R710
R736
C703
CNP701
C707
R773
R772
D703
R771
C728
C729
R741
R740
R735
C730
C727
C731
R742
R743
R744
R745
C734
R746
R747
C736
C737
R748
C732
C733
R751
D701
C735
R757
C750
C751
R758
C746
C747
C748
C749
JC702
JW504
JW503
JW501
JW502
CN501
1
2
14
13
1
2
19
18
1-872-610-
11
(11)
CD BOARD
A
VOL BOARD
CN305
K
A
K
A
BP782
BP781
BP702
BP701
E
B
C
1
7
8
14
28
22
52
1
27 26
13
14
40
39
21
15
TP (RF)
TP (VREF)
1
2
15
16
1-872-603-
11
(11)
RELAY BOARD
1
19
CD MECHANISM
DECK BLOCK
(CDM-3525)
+
+
+
+
+
+
+
+
+
A
B
C
D
E
1
2
3
4
5
6
7
8
(Page 22)
Click on the first or last page to see other ICF-CD7000 service manuals if exist.