Sony MDR-RF930 Service Manual Download | Manualshive

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MICROFILM

SERVICE MANUAL

WIRELESS STEREO HEADPHONES

US Model

Canadian Model

SPECIFICATIONS

MDR-RF930

MDR-RF930 is headphones
in MDR-RF930K.

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 heat.

Ver 1.0 1998. 06

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Summary of Contents for MDR-RF930

Page 1: ...S Model Canadian Model SPECIFICATIONS MDR RF930 MDR RF930 is headphones in MDR RF930K 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 heat Ver 1 0 1998 06 ...

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

Page 3: ...rews P2 6 4 two screws P2 10 7 ball shaft holder 8 housing R assy 6 screw P 2 10 5 hanger R 2 screw B1 7 4 1 ear pad 3 driver R CH This set can be disassembled in the order shown below SECTION 2 DISASSEMBLY HOUSING L ASSY HANGER L HOUSING R ASSY HANGER R BATTERY CASE RX BOARD SET Note Follow the disassembly procedure in the numerical order given HOUSING L ASSY HANGER L ...

Page 4: ...two head bands 5 suspender assy 1 two screws P2 10 2 battery case 3 tension spring 4 push 1 key SWITCH 6 two head bands 7 suspender assy 1 RX board 3 RX shield plate 5 tension spring 2 two screws B1 7 4 BATTERY CASE ...

Page 5: ...rd 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 cond...

Page 6: ...01 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 RF930 so as to attain 13 5 mVrms Adjustment Location TX BASE ...

Page 7: ...t 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 speak...

Page 8: ...ee 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 Adjustment Location Transmitter TMR RF930 ...

Page 9: ... 9 Headphone MDR RF930 L301 Receiving Frequency Adjustment RV301 VOL RV302 TUNING MAX MIN RX BASE board Component Side IC301 RV303 Separation Adjustment RX BASE board Conductor Side ...

Page 10: ... 10 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 SECTION 4 DIAGRAMS IC Block Diagrams IC301 CXA1611N T4 IC302 LA4533M ...

Page 11: ...k Ref No Part No Description Remark 1 4 994 122 01 COVER L HANGER 2 X 4950 202 1 HOUSING L ASSY 3 4 994 129 01 PAD EAR 4 3 318 203 71 SCREW B1 7X5 TAPPING 5 4 992 281 01 HOLDER BALL SHAFT 6 4 995 475 01 SPRING TENSION 7 4 994 119 01 HANGER R 8 A 4542 518 A RX BASE BOARD COMPLETE 9 4 995 597 01 SPACER 10 4 994 121 21 COVER R HANGER 11 X 4950 201 1 HOUSING R ASSY 12 4 994 118 01 BAND HEAD 13 4 994 1...

Page 12: ...AMIC 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 C44 1 162 927 11 CERAMIC CHIP 100PF 5 50V IC IC1 8 759 469 63 IC S 81215SGUP DQK T1 RESISTOR JR1 1 216 864 11 M...

Page 13: ... 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 8 729 230 49 TRANSISTOR 2SC2712 YG Q304 8 729 230 49 TRANSISTOR 2SC2712 YG Q305 8 729 230 49 TRANSISTOR 2SC2712 YG Q306 8 729 920 31 TRANSISTOR DTC343TK Q307 8 729...

Page 14: ...ET 22K MISCELLANEOUS MDD01 1 505 117 21 DRIVER L CH MDD02 1 505 117 21 DRIVER R CH SW1 1 771 249 11 SWITCH PUSH 1 KEY POWER HARDWARE LIST 1 7 685 104 19 SCREW P 2X6 TYPE2 NON SLIT 2 7 685 106 19 SCREW P 2X10 TYPE2 NON SLIT 4 7 685 105 19 SCREW P 2X8 TYPE2 NON SLIT Sony Corporation Personal A V Products Company 9 924 923 11 98F057022 1 Printed in Singapore 1998 6 Published by Quarity Engineering De...

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