SONY MDRIF8000
Manual de Servicio

MDR-IF8000

Note: � 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 � and 1/4 W or less unless otherwise specified. � f : internal component. � : B+ Line. � H : adjustment for repair. � Power voltage is dc 3V and fed with regulated dc power supply from battery terminal. � Voltages and waveforms are dc with respect to ground under nosignal conditions. no mark : LINE � Voltages are taken with a VOM (Input impedance 10 M�). 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 tolerances. � Circled numbers refer to waveforms. � Signal path. J : LINE (ANALOG) c : LINE (DIGITAL)

z

IC Block Diagrams IC11, 52 MC34119DTBR2
VO2 VO1
7 6 5 2

8

BIAS CIRCUIT

1

CF 2 Vcc

CF 1

IC502 TC7WU04FU (TE12R)

Note: � X : parts extracted from the component side. � a : Through hole. � : Pattern from the side which enables seeing. (The other layers'patterns are not indicated) Caution: Pattern face side: (Side B) Parts face side: (Side A)
z Waveforms

1A 3Y 2A

1 2 3 4

8 7 6 5

VCC 1Y 3A 2Y

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.

CD

GND

� RX1 SECTION �

1
3.8Vp-p

10 µsec

Q202 D

VOLT/DIV : 1 V AC TIME/DIV : 5 µsec

� RX2 SECTION �

2
2.5 Vp-p

12.288MHz
VOLT/DIV : 1 V AC TIME/DIV : 50 nsec

IC101 rd OSCO

GND

V in

+ +
_ 3 4

_

13