Sony MDR-IF540R, Руководство по обслуживанию, Страница: 16 / 30

16
MDR-IF540R
SECTION 4
DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
for schematic diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
Ω
and 1 /
4
W or less unless otherwise
specified.
•
C
: panel designation.
•
A
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 2.4 V and fed with regulated dc power
supply from battery terminal.
• Voltage is dc with respect to ground under no-signal
(detuned) conditions.
• Voltages are taken with a VOM (Input impedance 10 M Ω ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F
: ANALOG
J
: RF
for printed wiring boards:
•
X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
a
: Through hole.
• : Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A)
parts face are indicated.
4-1. CIRCUIT BOARDS LOCATION
RX board
BATT board
SW board
PD1 board
(L-CH front)
PD1 board
(R-CH rear)
PD2 board
(L-CH rear)
PD2 board
(R-CH front)