Sony ICF-DVD57TV Service Manual page 27

• 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.
•
W : indicates side identified with part number.
•
z : Through hole.
•
f : internal component.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
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.
Caution:
Pattern face side: Parts on the pattern face side seen from
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.
• DVD board is multi-layer printed board.
However, the patterns of intermediate-layer have not been in-
cluded in this diagrams.
ICF-DVD57TV
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
1 / W or less unless otherwise
4
specified.
•
f : internal component.
• 2 : nonflammable resistor.
• C : panel designation.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• A : B+ Line.
• B : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
– DVD/MONITOR Boards –
no mark : DVD PLAY
( ) : CD PLAY
[ ] : TV
〈〈 〉〉 : AUX
∗
: Impossible to measure
– TU Board –
no mark : FM
( ) : AM
– Other Boards –
no mark : RADIO (FM/AM)
( ) : DVD PLAY
[ ] : TV
〈〈 〉〉 : AUX
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
L : DVD/CD PLAY (VIDEO)
F
: DVD/CD PLAY (ANALOG AUDIO OUT)
J
: DVD/CD PLAY (DIGITAL AUDIO OUT)
N
: FM
O : AM
E : TV (AUDIO)
a : TV (VIDEO)
d : AUX (AUDIO)
G : AUX (VIDEO)
• Circuit Boards Location
TRANS board
LCD board
MS-203 board
27 27
DVD board
DETECTION board
TU board
MAIN board
KEY board
MONITOR board
ICF-DVD57TV