Sony MDR-IF4000 service manual Section Diagrams, Circuit Boards Location

MDR-IF4000

SECTION 3

DIAGRAMS

NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.

For schematic diagrams.

Note:

•All capacitors are in ∝F 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 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.

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.)

• Waveforms

1IC101 rd OSCO

12.288 MHz 3.5Vp-p

1V/DIV, 50 ns/DIV

3-1. CIRCUIT BOARDS LOCATION

RD2 board (R-CH REAR)

SW board

RD1 board (R-CH FRONT)

RD1 board (L-CH REAR)

BATT board

RX board

RD2 board (L-CH FRONT)

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