Sony CDX-454RF / CDX-454XRF Service Manual ▷ View online
CDX-454RF/454XRF
22
22
7-2.
BLOCK DIAGRAM – MAIN Section –
OUTPUT
CN703
22
LIN
1
RIN
A
(Page 21)
L, R
L
R
PRE-EMPHASIS
& LIMITER
PRE-EMPHASIS
& LIMITER
L. P. F.
L. P. F.
MPX
14
XIN
13
XOUT
OSC
MUTING
OSC
BUFFER, AMP
Q702
RF AMP
PHASE
DETECTOR
PROGRAM
COUNTER
SHIFT
REGISTER
X701
7.6MHz
5
MPX
ADJ
18
MUT
FM STEREO
TRANSMITTER
IC701
9
11
7
RF IN
PD
RF OUT
L. P. F.
RV701
TRANSMITTER
MODULATION
SENSITIVITY
5 4 3
DATA
CLK
CE
3
ACC
2
B. UP
POWER
CN303
98
97
96
PLLDATA
PLLCLK
PLLCE
PLLDATA
PLLCLK
PLLCE
62
ACCIN
60
MCK
PLLDATA
PLLCLK
PLLCE
ACCESSORY
CHECK
Q308
D311
59
EHS
51
AVREF
ELVON
RV201
ELEVATOR HEIGHT
(ADDRESS)
RV202
ELEVATOR HEIGHT
SENSOR
REFERENCE VOLTAGE
SWITCH
Q201
B. UP +5V
9
LCDON 36
+8V
REGULATOR
IC304
DRIVER +8V
+10V
REGULATOR
Q311
+5V
REGULATOR
IC304
LCD +10V
REGULATOR
CONTROL
Q309, 310
BUCHK 75
D306
D302
D307
38
CDON 8
EJECT 63
SW302
(RESET)
B. UP +5V
KEY +5V
+5V
REGURATOR
Q303
+5V
REGURATOR
IC305
DAC/SERVO +5V
Z
SW301
76 MGLK
74 ELVF
73 ELVR
SW201
MAGAZINE
DETECT
ON : When magazine
is set
is set
3
4
40 XTAL
41 EXTAL
80 KEYACK
95 ADON
58 KEYIN
9
7
MOTOR
DRIVE
IN1
IN2
OUT1
OUT2
ELEVATOR
MOTOR DRIVE
IC301
M
M104
(ELEVATOR)
X201
12MHz
KEY ACTIVE
SWITCH
Q231
KEY +5V
SWITCHING
Q232
44 LCDDATA
45 LCDCLK
37 LCDCE
43 LCDINH
6
7
4
5
8
3
DISPLAY
CN302
LCD +10V
POWER ON
LCDINH
LCDCE
LCDCLK
LCDDATA
KEYA/D
B. UP +5V
SYSTEM CONTROLLER
IC201 (2/2)
• SIGNAL PATH
: CD PLAY
RESET
HIGH VOLTAGE
DETECT
Q301
BATTERY
CHECK
Q301, 302
RESET SIGNAL
GENERATOR
IC303
D308
FM STEREO
TRANSMITTER
+5V
F301
D312
CDX-454RF/454XRF
23
23
7-3.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
•
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
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 on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from CD changer controller.
• Voltages and waveforms are dc with respect to ground
in CD play mode.
no mark : CD PLAY
no mark : 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.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J
: CD PLAY
Note:
The components identi-
fied by mark
The components identi-
fied by mark
0
or dotted
line with mark
0
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
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce por tant le numéro
spécifié.
Ne les remplacer que par une
pièce por tant le numéro
spécifié.
• Circuit Boards Location
SW board
FM board
LSW board
RF board
MAIN board
CDX-454RF/454XRF
24
24
7-4.
PRINTED WIRING BOARDS – RF/LSW Boards –
•
See page 23 for Circuit Boards Location.
IC201
IC101
(Page 26)
CDX-454RF/454XRF
25
25
7-5.
SCHEMATIC DIAGRAM – RF/LSW Boards –
•
See page 32 for Waveforms.
•
See page 32 for IC Block Diagrams.
(Page 28)
The components identified by 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.
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