Sony NC-AA MDR-RF950 Service Manual Download

Page: 9 / 16

– 9 –

– 10 –

SECTION 4

DIAGRAMS

Headphone (MDR-RF950)

L301
Receiving Frequency
Adjustment

RV301

VOL

RV302

TUNING

MAX

MIN

[RX-BASE board] – Component Side –

IC301

RV303
Separation Adjustment

[RX-BASE board] – Conductor Side –

POWER

SWITCH

MUTE

BIAS

AMP

10 MUTE

R-OUT

GND

L-OUT

VCC

PWR

R-IN

GND

L-IN

REG

• IC Block Diagrams

IC301

CXA1611N-T4

IC302

LA4533M

Summary of Contents for NC-AA MDR-RF950

Page 1: ...cking Adjusting Receiving Frequency 5 3 2 Checking Adjusting Degree of Modulation of Main Carrier L R 6 3 3 Checking Adjusting Separation 7 4 DIAGRAMS 4 1 Printed Wiring Boards 11 4 2 Schematic Diagram 13 5 EXPLODED VIEWS 15 6 ELECTRICAL PARTS LIST 17 Notes on chip component replacement Never reuse a disconnected chip component Notice that the minus side of a tantalum capacitor may be dam aged by ...

Page 2: ... 2 SECTION 1 GENERAL This section is extracted from instruction manual ...

Page 3: ...s set can be disassembled in the order shown below SET FRONT PLATE ASSY RX BASE BOARD SW BOARD HANGER COVER L 4 Remove two solders of driver lead 1 ear pad 3 front plate assy 2 three screws P2 6 2 hanger cover R 4 RX BASE board 3 Remove four solders of leads 1 two screws P2 6 1 two screws P2 10 3 Remove three solders of leads ...

Page 4: ... 4 SW BOARD HANGER COVER L 2 screw P2 6 3 switch support 5 SW board 4 head cushion assy 1 two head bands 2 hanger cover L 3 Remove two solders of battery lead 1 two screws P2 6 1 two screws P2 10 ...

Page 5: ...d 8 After confirming that demodulated 1 kHz waveform about 13 mV appears on the oscilloscope check that the DC voltmeter indicates DC1 V to 1 2 V 9 If demodulated 1 kHz waveform does not appear on the oscilloscope or if the voltage is out of the specified value adjust the air core coil L301 on the RX BASE board so that the demodulated 1 kHz waveform appears on the oscilloscope and under this condi...

Page 6: ... pin and ground on the RX BASE board 6 Rotating the tuning control RV302 on the RX BASE board receive signals 7 After confirming that demodulated 1 kHz waveform appears on the oscilloscope check that the AC voltmeter indicates 12 mVrms to 15 mVrms 8 If out of the specified value rotate RV404 on the TX BASE board in the transmitter TMR RF950R so as to attain 13 5 mVrms Adjustment Location TX BASE b...

Page 7: ... a difference in speaker output level between Lch and Rch i e separation is over 20 dB If not over 20 dB rotate RV303 on the RX BASE board to minimize the Rch output then reconfirm that a difference in speaker output level between Lch and Rch is over 20 dB 9 Enter 1kHz 316 mVrms signal only to the Rch on the transmitter 10 Adjust the volume control RV301 on the RX BASE board so that the Rch speake...

Page 8: ... Location Transmitter TMR RF950R RV404 Degree of Modulation of Main Carrier L R Adjustment N O I S E F I L T E R O F F O N J402 Rch J403 Lch S 402 C H A N N E L C H 1 C H 2 C H 3 S 4 0 1 TX BASE board Component Side ...

Page 9: ...tment RV301 VOL RV302 TUNING MAX MIN RX BASE board Component Side IC301 RV303 Separation Adjustment RX BASE board Conductor Side POWER SWITCH MUTE BIAS AMP AMP 1 2 3 4 5 6 7 8 9 10 MUTE R OUT GND L OUT VCC PWR R IN GND L IN REG IC Block Diagrams IC301 CXA1611N T4 IC302 LA4533M ...

Page 10: ......

Page 11: ......

Page 12: ...70 527 11 SW BOARD 9 4 999 767 01 HANGER R 10 7 685 106 19 SCREW P 2X10 TYPE2 NON SLIT 11 4 966 791 11 STOPPER UPPER 12 4 966 792 11 STOPPER LOWER 13 3 318 203 62 SCREW B1 7X4 TAPPING 14 7 685 104 19 SCREW P 2X6 TYPE2 NON SLIT MDD02 1 505 117 21 DRIVER R CH 51 4 999 771 01 SUSPENDER 52 4 978 518 02 BASE SUSPENDER 53 4 978 519 01 CUSHION HEAD 54 3 318 203 62 SCREW B1 7X4 TAPPING 55 4 966 792 11 STO...

Page 13: ...C21 1 162 964 11 CERAMIC CHIP 0 001uF 10 50V C23 1 162 906 11 CERAMIC CHIP 1 5PF 0 25PF 50V C24 1 162 906 11 CERAMIC CHIP 1 5PF 0 25PF 50V C28 1 162 917 11 CERAMIC CHIP 15PF 5 50V C30 1 162 921 11 CERAMIC CHIP 33PF 5 50V C39 1 162 964 11 CERAMIC CHIP 0 001uF 10 50V C40 1 162 909 11 CERAMIC CHIP 4PF 0 25PF 50V C41 1 162 910 11 CERAMIC CHIP 5PF 0 25PF 50V C43 1 162 964 11 CERAMIC CHIP 0 001uF 10 50V...

Page 14: ... 00 SHORT 0 JR309 1 216 295 00 SHORT 0 JR310 1 216 295 00 SHORT 0 JR311 1 216 295 00 SHORT 0 JR312 1 216 295 00 SHORT 0 JR313 1 216 295 00 SHORT 0 JR314 1 216 295 00 SHORT 0 JR315 1 216 295 00 SHORT 0 JR316 1 216 296 00 SHORT 0 COIL L301 1 416 796 11 COIL AIR CORE L302 1 412 933 11 INDUCTOR 0 33uH TRANSISTOR Q301 8 729 230 49 TRANSISTOR 2SC2712 YG Q302 8 729 230 49 TRANSISTOR 2SC2712 YG Q303 8 729...

Page 15: ... 10W R350 1 216 053 00 METAL CHIP 1 5K 5 1 10W VARIABLE RESISTOR RV301 1 223 968 11 RES VAR CARBON 20K 20K VOL RV302 1 225 641 11 RES VAR CARBON 10K TUNING RV303 1 238 857 11 RES ADJ CERMET 22K 1 670 527 11 SW BOARD SWITCH SW1 1 572 467 61 SWITCH PUSH 1 KEY POWER MISCELLANEOUS MDD01 1 505 117 21 DRIVER L CH MDD02 1 505 117 21 DRIVER R CH RX BASE SW ...

Page 16: ... 20 MDR RF950 Sony Corporation Personal A V Products Company 9 924 925 11 98F057022 1 Printed in Singapore 1998 6 Published by Quarity Engineering Dept Shibaura ...

Search results

Summary of Contents for NC-AA MDR-RF950

Reviews:

Related manuals for NC-AA MDR-RF950

Brands by name

Popular brands

Sony NC-AA MDR-RF950, Service Manual

Search results

Summary of Contents for NC-AA MDR-RF950

Reviews:

Related manuals for NC-AA MDR-RF950

Brands by name

Popular brands