Sony MDR-IF4000 Manual

10

For schematic diagrams.
Note:
• 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

/

4 

W or less unless otherwise

specified.

•

f

: internal component.

• 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.

• Voltages and waveforms are 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.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal produc-
tion tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F

: ANALOG

J

: RF

For printed wiring boards.
Note:
• 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.)

1V/DIV, 50 ns/DIV

3.5Vp-p

12.288 MHz

1

 

 

rd

 

RX board

BATT board

SW board

RD2 board
(R-CH REAR)

RD1 board
(R-CH FRONT)

RD2 board
(L-CH FRONT)

RD1 board
(L-CH REAR)