Sony CDX-424RF Service Manual ▷ View online
– 17 –
– 18 –
SECTION 7
DIAGRAMS
7-1.
NOTES FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
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.
•
¢
: internal component.
•
C
: panel designation.
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
r
: Through hole.
•
¢
: internal component.
• b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
•
U
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 14.4V and fed from CD changer con-
troller.
• Voltages and waveforms are dc with respect to ground in
playback mode.
• 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.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
J
: CD
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component Side) the parts face are indicated.
Note:
The components identi-
fied by mark
The components identi-
fied by mark
!
or dotted
line with mark
!
are criti-
cal for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
!
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
• FOCUS GAIN ADJUSTMENT
(COARSE ADJUSTMENT)
(COARSE ADJUSTMENT)
This adjustment is to be performed when replacing the following
parts.
• Optical Pick-up Block
• RV14
parts.
• Optical Pick-up Block
• RV14
[RF BOARD] – Conductor Side –
Procedure:
1. Set RV14 (RF board) to the standard position.
2. Check that there is not an abnormal amount of operation noise
1. Set RV14 (RF board) to the standard position.
2. Check that there is not an abnormal amount of operation noise
(white noise) from the 2-axis devise. If there is, turn RV14
slightly clockwise.
slightly clockwise.
[RF BOARD] – Conductor Side –
• When gain is lowered...
The set does not play because of no focus operation.
• When gain is highered...
Operation noise is heard due to a scratch or a dust, then opera-
tion will be unstable.
tion will be unstable.
RV14
IC11
IC51
CNJ12
MIN side
(low gain)
(low gain)
MAX side
(high gain)
(high gain)
RV14 standard position
CDX-424RF
– 19 –
– 20 –
• Semiconductor
Location
Ref. No.
Location
IC11
C-6
IC51
B-7
IC52
G-4
Q11
D-6
7-2.
PRINTED WIRING BOARDS – RF Section –
(Page 24)
CDX-424RF
7-3.
SCHEMATIC DIAGRAM – RF Section –
•
See page 31 for Waveforms.
•
See page 32 for IC Block Diagrams.
The components identified by mark
!
or dotted
line with mark
!
are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque
!
sont
critiques pour la sécurité.
Ne les remplacer que
par une piéce portant le numéro spécifié.
– 21 –
– 22 –
(Page 27)
CDX-424RF
– 23 –
– 24 –
D201
D-7
D202
E-6
D203
G-8
D204
G-8
D205
G-9
D206
G-8
D207
G-8
D301
F-10
D311
F-7
D416
C-8
D417
C-8
D501
E-6
D502
E-7
D503
E-7
D504
E-7
D505
E-6
IC101
B-11
IC202
G-8
IC204
E-8
IC301
G-7
IC302
E-11
IC401
B-9
Q202
C-6
Q203
H-8
Q204
H-8
Q205
G-8
Q301
F-12
Q401
D-8
Q402
D-7
Q403
D-7
Q404
D-7
7-4.
PRINTED WIRING BOARDS – MAIN (Component Side)/JACK Board –
• Semiconductor
Location
Ref. No.
Location
(Page 20)
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