Read Sony HCD-FX250 Service Manual online
HCD-FX250
HCD-FX250
12
12
For Schematic Diagrams.
Note:
• All capacitors are in μF unless otherwise noted. (p: pF) 50
• All capacitors are in μF unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specifi ed.
• f : internal component.
•
C : panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
For Printed Wiring Boards.
Note:
•
•
X : Parts extracted from the component side.
•
Y : Parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Indication of transistor.
C
B
These are omitted.
E
Q
Caution:
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
Parts on the pattern face side seen
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
• Circuit Boards Location
BD73 board
POWER-TR board
REG board
PANEL board
MAIN board
PT board
MODULE (DAB TUNER)
(DAB1)
(DAB1)
•
A : B+ Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
– CD Board –
no mark : CD PLAY
– Other Boards –
no mark : TUNER (FM)
( ) : CD PLAY
• Voltages are taken with VOM (Input impedance 10 M
no mark : CD PLAY
– Other Boards –
no mark : TUNER (FM)
( ) : CD PLAY
• Voltages are taken with VOM (Input impedance 10 M
Ω).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F :
TUNER
(DAB/FM)
J
: CD PLAY
f :
AUDIO
IN
Note: The components identifi ed by mark
0 or dotted
line with mark
0 are critical for safety.
Replace only with part number specifi ed.
• Waveforms
– BD73 Board –
– PANEL Board –
1
IC101 us (XOUT)
1 V/DIV, 50 ns/DIV
59 ns
2.2 Vp-p
0
IC801
qd (Sub Clock (32kHz))
qd (Sub Clock (32kHz))
2 V/DIV, 20
Ps/DIV
30.4
Ps
3 Vp-p
qa
IC801
qh (Main Clock (15MHz))
qh (Main Clock (15MHz))
1 V/DIV, 50 ns/DIV
67 ns
2.4 Vp-p
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