Sony MDRRF-975-R Service manual

Download

Page 1

MDR-RF975R

SERVICE MANUAL

Ver 1.1 2001. 06

MDR-RF975R is the component model block one in the MDR-RF975RK.

COMPONENT MODEL NAME FOR MDR-RF975RK

Headphones MDR-RF975R

Transmitter TMR-RF975R

US Model

SPECIFICATIONS

Headphones

Power source DC 2.4 V: Built-in rechargeable

battery

Mass Approx. 350 g (12.3 oz.) incl.

built-in rechargeable battery

Built-in Ni-MH rechargeable battery

Model name NH-AAC Voltage 1.2 V Capacity 1,000 mAh

Design and specifications are subject to change without notice.

9-873-141-12

2001F0200-1

HEADPHONES

Sony Corporation

Personal Audio Company

Shinagawa Tec Service Manual Production Group

Page 2

MDR-RF975R

SECTION 1

GENERAL

TABLE OF CONTENTS

Specifications ............................................................................ 1

1. GENERAL ......................................................................... 2

2. DISASSEMBLY

2-1. Driver (R Side), RX-BASE Board ........................... 3

2-2. SW Board, Hanger (R) ............................................. 4

2-3. Holder (R) ................................................................. 4

2-4. Driver (L Side) .......................................................... 5

2-5. Hanger (L) ................................................................ 6

2-6. Holder (L) ................................................................. 6

3. ELECTRICAL ADJUSTMENTS

3-1. Free Run Frequency Check and Adjustments........... 7

3-2. Receive Frequency Check and Adjustments ............ 7

3-3. Carrier Modulation Check ........................................ 7

3-4. Expander Output Check ............................................ 7

3-5. Separation Check ...................................................... 7

4. DIAGRAMS

4-1. Block Diagrams .......................................................11

4-2. Schematic Diagram ................................................. 12

4-3. Printed Wiring Board .............................................. 13

5. XPLODEDVIEWS....................................................... 14

This section is extracted from instruction manual.

Turn up the volume to a moderate level with the VOL control. Press the TUNING button briefly for automatic tuning of the headphones. If you do not receive a clear audio signal, press it again.

TUNING button

VOL control

Try the above steps 3 and 5 until the receiving performance becomes better.

6. ELECTRICAL PARTSLIST..................................... 15

Auto power on/off function

When you remove the headphones from your head, the power turns off automatically. Do not allow the self adjusting band to be pulled up, otherwise the headphones will be switched on.

The power turns on.

Flexible Circuit Board Repairing

• Keep the temperature of soldering iron around 270°C during repairing.

• Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering or unsoldering.

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be damaged by heat.

Page 3

SECTION 2

DISASSEMBLY

• The equipment can be removed using the following procedure .

MDR-RF975R

Set

Driver (R side), RX-BASE board

Driver (L side), Hanger (L)

SW board, Harger (R)

Holder (L)

Note: Follow the disassembly procedure in the numerical order given .

2-1. DRIVER (R SIDE), RX-BASE BOARD

Volume knob

Holder (R)

Set the each leads as illustrated below.

From head band assy (front).

From head band assy (rear).

Groove

From SW board.

Groove

RX-BASE board

Remove the eight solderings.

(Housing (R) side)

Head band assy (front)(natural)

Charge terminal

Remove the

two solderings.

Precaution for installtion

ANT

RX-BASE board

SW board

Head band assy (rear)(natural)

Head band assy (rear)(green)

Driver (natural)

Driver (red)

Holder (R),ear pad

Remove the

two solderings.

Four

claws

Driver

Four screws (M 2

Housing (R)

Precaution for installtion

Plate (R) assy, front

pad, ear

× 5)

Precaution for installtion

Driver (R side)

Head band assy (front)(red)

Solder the each leads directly to the position as shown while being cautions of colors.

SW board

Red Natural

From RX-BASE board.

Page 4

MDR-RF975R

2-2. SW BOARD, HANGER (R)

Housing (R)

Precaution for installtion

Lid (R), hanger

Remove the

two solderings.

SW board

Holder (R)

Two screw

(P 2

× 8)

Set the each leads as illustrated below.

Groove

From head band assy (front).

From head band assy (rear).

2-3. HOLDER (R)

Spring

(ON/OFF)

From SW board.

Groove

Hanger (R)

Holder (R)

SW board

Cushion assy, head

Band assy (front), Head

Band assy (rear), head

Hanger (R)

Screw (P 2

× 8)

Two screws

× 8)

(P 2

Chassis

Page 5

2-4. DRIVER (L SIDE)

Set the each leads as illustrated below.

MDR-RF975R

From head band assy (front).

Groove

Housing (L)

Precaution for installtion

Plate (L) assy, front

Pad, ear

Four screws (M 2

Precaution for installtion

× 5)

Driver (L side)

From head band assy (rear).

Driver

Four

claws

Remove the

two solderings.

Two "batterys,

nickle hydrogen"

Ear pad

holder (L)

Green

Natural

Remove the

two solderings.

Green Natural

From head band assy (rear).

Page 6

MDR-RF975R

2-5. HANGER (L)

Lid (L), hanger

Housing (L)

Precaution for installtion

Two screws

(M 2

× 5)

Holder (L)

Set the each leads as illustrated below.

Hanger (L)

2-6. HOLDER (L)

Groove

From head band assy (front).

From head band assy (rear).

Groove

Hanger (L)

Cushion assy, head

Holder (L)

Band assy (front),head

Band assy

(rear), head

Chassi

Screw (M 2

× 5)

Two screws

(M 1.7

× 3)

Page 7

SECTION 3

7 7

ELECTRICAL ADJUSTMENTS

MDR-RF975R

Ver 1.1 2001.06

Notes:

1. Use transmitter with check and adjustment alreadycompleted.

2. On adjusting the headphones section, use the transmitter as a jig.

Headphones:MDR-RF975R Transmitter:TMR-RF975R

Procedure:

1. Connect an oscillator with attenuator and terminator (600 Ω) to the transmitter AUDIO IN-A connector (J402).

2. Connect an AC adapter to the transmitter DC IN 9V jack (J404).

3. Short between Q303 collector and GND on the RX board.

4. Connect DC 2.4V to the +B power line externally.

5. Connect lead wires to IC301 pin 4, pin 6, pin 7, IC 307 pin 7, IC 308 pin 7 and GND on the RX-BASE board.

6. Connect a 33kΩ resistor between IC301 pin 4 and pin 7.

7. Connect lead wires to the speakers’ terminals (L+,L-,R+,R-) on the RX-BASE board. (See page 9)

3-1. Free Run Frequency Check and Adjustment

1. Set the transmitter AUDIO IN-A connector (J402) to no signal.

Note: In this case, operation time is about 5 or 10 minutes.

Perform the confirmation for less than 5 minutes.

2. Check the transmitter power indicator (red) lights.

3. Set the transmitter CHANNEL switch to 1.

4. Connect DC 1.2V across TP and GND.

5. Connect a frequency counter to IC301 pin 4 and GND on the RX-BASE board, then confirm the frequency within 76KHz ± 50Hz.

6. When the frequency dose not satisfy the specified value, adjust the value of the frequency counter to specification by RV301 on the RX-BASE board.

Specified values: 76kHz ± 50Hz.

7. Remove a 33kΩ resistor between IC301 pin 4 and pin 7.

Setting :

Regulated power supply (DC 1.2V)

+ –

Frequency counter

+ –

IC301 pin

3-2. Receive Frequency Check and Adjustment

1. Set the transmitter CHANNEL switch to 2.

2. Set the transmitter NOISE FILTER switch to OFF.

3. Input a signal of 1kHz, 316mVrms to transmitter AUDIO INA(L-ch) connector only.

4. Keep distance between transmitter and headphones to 5 meters over.

5. Set the headphones volume (RV302) to minimum.

6. Connect DC 1.2V across TP and GND.

7. Connect an oscilloscope CH1 and CH2 to IC301 pin 6 and pin 4.

8. Check the waveform of the oscilloscope to CH1 is demodulated 1kHz signal and CH2 is GND.

9. If CH1 and CH2 are not satisfied in step 8, adjust the coil (L301) on the RX board to satisfied step 8.

10. Open between Q303 corrector and GND on the RX board.

11. When the transmitter off, check the waveform of the oscilloscope as follows:

1.8V

GND

2-3sec

0.6V

12. Set the transmitter CHANNEL switch to 1.

13. Push the headphones tuning switch (S301) to receive radio frequency.

14. Check same step 8.

15. Set the transmitter CHANNEL switch to 3.

16. Push the headphones tuning switch (S301) to receive radio frequency.

17. Check same step 8.

Setting :

Regulated power supply (DC 1.2V)

–

OSCILLOSCPE

IC301 pin6

CH1 CH2

–+–

IC301 pin

3-3. Carrier Modulation Check

1. Set the transmitter CHANNEL switch to 2.

2. Set the transmitter NOISE FILTER switch to OFF.

3. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-A (L-ch) connector only.

4. Set the headphones volume (RV302) to minimum.

5. Connect an oscilloscope CH1 and CH2 to IC301 pin 6 and pin 4.

6. Push the headphones tuning switch (S301) to receive radio frequency.

7. Check the waveform of the oscilloscope that the CH1 is demodulated 1kHz signal and CH2 is GND.

8. Connect an AC voltmeter with LPF to IC301 pin 6 and GND.

9. Check the value of the AC voltmeter to 40mVrms ± 5mV

Setting :

Digital voltmeter (AC range)

–

LPF

2.2K

33000P

IC301

pin6

OSCILLOSCPE

IC301 pin6

CH1 CH2

–+–

IC301 pin4

3-4. Expander Output Check

1. Set the transmitter CHANNEL switch to 2.

2. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-A L and R connector.

3. Connect an AC voltmeter to IC307 pin 7 and IC308 pin 7.

4. Measure the value of the AC voltmeter.

5. Input a signal of 1kHz, 31.6mVrms to transmitter AUDIO INA L and R connector.

6. Measure the value of the AC voltmeter.

7. Check the difference of the step 4 and step 6 to more than 20 dB ± 3 dB.

Setting :

Digital voltmeter (AC range)

–

IC307 pin IC308 pin

3-5. Separation Check

1. Set the transmitter CHANNEL switch to 2.

2. Set the transmitter NOISE FILTER switch to OFF.

3. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-A (L-ch) connector only.

4. Connect an oscilloscope CH1 to speakers terminal (L+,L-) and CH2 to IC301 pin 4 and GND.

5. Push the headphones tuning switch (S301) receive radio frequency.

Page 8

MDR-RF975R

Ver 1.1 2001.06

6. Check the waveform of the oscilloscope that the CH1 is demodulated 1kHz signal and CH2 is GND.

7. Connect an AC voltmeter with LPF to speakers terminal (L+L-).

8. Adjust the value of the AC voltmeter to specification by headphones volume RV302.

Specified values: 155mVrms

9. Connect an AC voltmeter with LPF to speakersterminal (R+,R-).

10. Measure the value of the AC voltmeter.

11. Check the difference of the L and R to more than 25dB.

12. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-A (R-ch) connector only.

13. Connect an AC voltmeter with LPF to speakers terminal (R+,R-).

14. Adjust the value of the AC voltmeter to specification by headphones volume RV302.

Specified values: 155mVrms

15. Connect an AC voltmeter with LPF to speakers terminal (L+,L-).

16. Measure the value of the AC voltmeter.

17. Check the difference of the L and R to more than 25dB.

Setting :

Digital voltmeter (AC range)

–

LPF

2.2K

33000P

L+ / R+ L– / R–

OSCILLOSCPE

CH1 CH2

L+

–+–

L–

IC301 pin

Page 9

)

Asjustment Location :

RX-BASE BOARD (Conductor side)

C340

C337

R347

R349

C341

GND

L301: Receive frequency Adjustment

R340

R346

R341

R345

S301

CF301

R342

R344

C320

R343

IC303

C316

C344

R312

D301

L301

C322

C332

C336

C315

C313

D304 power

C321

C309

R325

R308

L302

C314

C355

C312

C329

C331

C317

C319

JC335

D310

C394

C308

C306

IC301

C359

C393

C303

C307

R309

C333

C363

R330

Q304

R322

C302

R320

Q305

IC305

R318

R321

R314

R302

C301

Q303

R348

R354

R331

R363

R364

R361

R360

R332

C323

JC303

10 6

IC302

R333

C361

R304

R310

R362

C362

C381

C304

R334

C352

C343

R353

JC306

C380

C305

R367

C345

JC309

R355

IC301

R305

JC311

Q301

R352

R351

JC304

R358

IC304

R315

C357

R316

C328

C330

C327

IC301

C342

R366

JC336

C326

JC332

GND

C311

RV301

CF302

R350

JC334

R356

C324

R357

C325

JC331

C310

C346

(Connect a 33 KΩ resistor

RV301: Free Run Frequency Adjustment

C318

C347

D303

JC333

L–

L+

R–

R+

MDR-RF975R

Short

+B power line (DC 2.4V)

RV302: Volume control

Page 10

MDR-RF975R

SECTION 4

DIAGRAMS

Note on schematic diagrams.

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 Ω and 1/

•

: internal component.

• A : B+ Line.

• H : adjustment for repair.

• Power voltage is dc 2.4V and fed with regulated dc power supply

from battery terminal.

• Voltages are dc with respect to ground under no-signal conditions.

• Voltages are taken with a VOM (Input impedance 10 MΩ).

• Signal path.

F : FM L : AUDIO

• IC BLOCK DIAGRAMS

IC302 LA4533M TP-1

W or less unless otherwise specified.

P/SW

IN1

PRE GND

IN2

REF

SWITCH

BIAS

AMP1

AMP2

POWER

IC305 TC7W74FU (TE12R)

CLR

VCC

RSQ

QDC

3Q2

MUTE

CIRCIUT

GND

MT/SW

OUT1

POWER GND

OUT2

VCC

Page 11

4-1. BLOCK DIAGRAMS

MDR-RF975R

ANT301

RX-BASE BOARD

FRONT END

FE UNIT

D301

RECEIVE

L301

FREQ.

FM FE

L302

IC303

COUNTER

CF301

CF302

10.7MHz

REG

1316

OSC

Q301

FM IF/

DISCRI

SWITCH

Q303

AUTO

BLEND

MUTE

IF AMP/DECODE

IC301

PD1

COUNTER

PD1

FREE RUN

1/2

VCO

RV301

FREQ.

DECODE

AMP

MONO/ST

DETUNE

MUTE

STEREO

IND

TUNING

IND

IC307

(L-CH)

IC308

Q306

6 2 5

HPF

R-CH

DETECT

IC304

IC309

LPF EQ

IC306

(R-CH)

EXPANDER

AMP

RV302

VOL

IC305

Q305

S301 TUNE

RX-SW BOARD

B+

D304

power

• Signal path. : FM

: AUDIO

• R-ch is omitted due to same as L-ch.

POWER AMP

IC302

MUTE

Q304

ON/OFF SW

RECHAGEABLE BATTERY

(NICKEL-CADMIUM)

NH-AAC

2PCS, 2.4V

R-CH

SPEAKER

L-CH

SPEAKER

R-CH

CHARGE

TERMINAL

(TO TMR-RF975R)

–

Page 12

MDR-RF975R

4-2. SCHEMATIC DIAGRAM

C311

16V

RV301

4.7k

FREE

RUN

CXA1538N

IC301

C302

0.47

C304

0.001

FREQ.

R310

3.3k

C301

IF AMP/DECODE

R304

3.3k

C303

4.7/16V

R302

2.2k

• See page 10 for Notes. • See page 10 for IC Block Diagrams.

D301

CF302

10.7MHz DISC

C381

4.7

16V

C305

0.001

C380

16V

1T363

C312

R312

3.3 15k

50V

C359

0.001

C314

C313

0.01

JC311

C306

R305

3.3k

16V

R370

8.2k

4.7 C370

1000p

R374

4.3k

C379

2200p

R372

R373

8.2k

C373

C372

1000p

R375

4.3k

R330

68p

C333

C307

0.01

C378 2200p

R371

8.2k

C371

C315

C320

R309 100k

C316

0.1 16V

µH

L301

10p

AIR COIL

L302

0.33

C308

16V

C310

C309

50V

R376 100k

Q306

2SC2712L

HPF

R380

1.0k

R377 100k

R400

C355

0.001

C319

0.01

C354

0.01

CF301

10.7MHz

R382

2.2k

R383

2.2k

R331

2.2k

R384

5.6k

C384 2200p

R385

5.6k

C385

2200p

C352

0.001

C329

0.01

LPF

IC309

NJM2100E

C388

150pF

C317

0.001

C336 56p

C332

56p

R325

330

C331

100

R401 100

C353

0.01

C382

Q307

2SC2712L

HPT

C383

R381

C386

0.022

R386

4.7k

C387

0.022

R387

4.7k

R308

2.2k

R320

R366

150

D303

UDZ-TE-17-2.2B

C346

0.22 JC304

C347

16V

C340

R340

0.1

8.2k COUNTER

R342

R341

240k

470k

IC303

TC74HC4024

30k

15k

7.5k

R345

R346

R347

R348

47k

C337 100p

R403

10k

R391 100k

R390 100k

R404

C404

10k

C389

150pF

C400

R343 120k

0.1

62k

R344

R349

ANT301

ANTENNA

FE UNIT

(FRONT END)

R356

22k

JC303

JC306

R367

47k

R353

R352

R351

R350

15k

C342

0.01

C341

0.1

10k

R392

3.9k

R393

2.2k

C377

2.2

C376 220p

Q301

FMW1

OSC

C375

R378

3.9k

R379

2.2

15k

C343

0.01

IC304

Q303

2SC2712L

OSC SWITCH

C391

2.2

C374 220p

2.2k

EQ AMP

IC306

NJM2100E

C392

2.2

C394

C393

16V

JC350

1000p

C356

10 16V

BA10393F

GND

CAP REF

REFERENCE

60K

SUN IN

NFIN

GND

CAP REF

REFERENCE

60K

SUN IN

NFIN

22k

47k

R358

R355

RECTIFIER

GAIN CELL

TK10691M

RECTIFIER

TK10691M

DETECT

R357

22k

IC307

GAIN CELL

IC308

R354

R364

C402

0.022

R395

3.3k

R394

3.3k

C403

0.022

R396

22k

R362

10k

R363

22k

C321

27k

R398

10k

R397

27k

RV302(1/2)

0.01

C318

R399

10k

RV302(2/2)

C322

C330

R333

2.2k

C361 100p

R334

2.2k

C362 100p

25V

R332

1.0k FF

C345

0.1

IC305

C399

0.01

C344

TC7W74FU

0.1

Q305

DTC114TK

BUFFER

EXPANDER

AMP

C397

2.2

C395

EXPANDER

AMP

C398

2.2

C396

R361

22k

R360

22k

S301

TUNE

CAP

RECT

20K

CONT

20K

SUM

VCC

CAP

RECT

20K

CONT

20K

SUM

VCC

RV302

2SC2712L

AUDIO MUTE

R318 47k

P S/W

IN1 PRE

GND

IN2

REF

POWER AMP

IC302

LA4533M

Q304

MT/SW

OUT1

POWER

OUT2

GND

VCC

C323

R314 100k

JC309

C357

0.01

0.1

C325

220

JC331

6.3V

C324

C326

220

JC332

6.3V

RECHARGEABLE

D304

TLSU124

power

(NICKEL-CADMIUM)

R316

R315

C327

0.1

220

6.3V

JC334

C328

0.1

JC333

R321

1.5k

BATTERY

NH-AAC

2pcs,2.4V

R322

6.8k

C363

0.01

JC336

JC335

D310

RB411D

SPEAKER

(L-ch)

SPEAKER (R-ch)

S302

(POWER ON/OFF)

TMR-RF975R

(BATTERY

CHARGE

TERMINAL)

Page 13

4-3. PRINTED WIRING BOARD

MDR-RF975R

3 4 5 6 7

9 10

• Semiconductor

ANT301

RX-BASE BOARD (SIDE A)

RX-BASE BOARD (SIDE B)

C303

(ANTENNA)

C309

R325

C329

C340

R340

R341

CF301

R342

R343

IC303

C331

R308

C337

C341

S301 TUNE

R346

R345

R347

R349

S301

R344

C320

C344

RV302

VOL

RECHAGEABLE BATTERY

(NICKEL-CADMIUM)

D301

R312

C316

L301

C322

NH-AAC

2PCS, 2.4V

C332

C336

C313

C315

C314

D304 power

C321

C319

L302

C317

C312

C394

C355

JC335

D310

C308

R302

C307

C302

R320

R330

C301

C306

IC301

R309

R348

C333

Q305

C359

Q304

C393

R322

C363

TO TMR-RF975R (BATTERY CHARGE TERMINAL)

IC305

R318

R321

R314

–

R331

R363

R361

R360

C323

JC303

10 6

IC302

R333

C381

R304

R310

Q303

R354

R362

R364

R332

C362

C361

1-677-934-

C304

R334

C380

C352

C343

R353

JC306

R367

C345

JC309

C305

R355

C328

R305

JC311

Q301

R352

R351

JC304 R358

IC304

R315

C357

R316

C330

(11)

R366

C327

C311

C342

JC336

JC332

RV301

C326

CF302

R350

R356

R357

JC334

C310

C346

C325

JC331

FE UNIT

(FRONT-END)

C318

C347

D303

C324

JC333

–

RX-SW BOARD

S302

(POWER ON/OFF)

1-678-658-

(11)

SPEAKER

(L-CH)

SPEAKER

(R-CH)

R401

C354

Q307

R381

C384

C353

R400

R383

C383

R385

R380

C372

C404

R372

R404

R387

C387

C385

C377

C382

R390

R393

C378

Q306

R377

IC309

C389

IC306

R374

R382

R384 R403

R391

R379

C388 R392

C376

R370

R371

R375

R378

C373

R386

C392

C391

C375

C370

C371

R376

C386

C374

C379

R373

IC308

JC350

C400

C398

C395

IC307

C399

C396

C356

R395

1-677-934-

C397

C402

C403

R394

R397

R396

R399

R398

(11)

Location

Ref. No. Location

D301 C-2 D303 D-5 D304 D-3 D310 E-3

IC301 B-3 IC302 E-4 IC303 C-2 IC304 D-4 IC305 D-4

IC306 E-8 IC307 D-8 IC308 D-8 IC309 D-8

Q301 C-4 Q303 C-4 Q304 D-3 Q305 C-3 Q306 C-8

Q307 C-7

Note:

• X : parts extracted from the component side.

• a : Through hole.

• : Pattern from the side which enables seeing.

(The other layer's patterns are not indicated.)

Caution: Pattern face side: Parts on the pattern face side seen from the (Side B) pattern face are indicated. Parts face side: Parts on the parts face side seen from the (Side A) parts face are indicated.

Page 14

MDR-RF975R

NOTE:

• -XX, -X mean standardized parts, so they may have some differences from the original one.

• Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items.

SECTION 5

EXPLODED VIEWS

• The mechanical parts with no reference number in the exploded views are not supplied.

• Hardware (# mark) list and accessories and packing materials are given in the last of this parts list.

not supplied

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks

1 3-224-689-01 SHEET (R), LIGHT PREVENTION 2 3-846-312-01 SPACER 3 X-3379-301-1 CUSHION ASSY, HEAD 4 3-046-718-01 PAD, EAR 5 X-3379-304-1 PLATE (L) ASSY, FRONT

6 X-3380-120-1 DRIVER ASSY 7 3-046-723-01 HOLDER (L), EAR PAD 8 1-756-109-11 BATTERY, NICKEL HYDROGEN 9 3-046-717-01 TERMINAL (SMALL), BATTERY 10 X-3380-844-1 HOUSING (L) ASSY

11 3-046-709-11 CAP (L), ORNAMENTAL 12 3-046-716-01 TERMINAL (LARGE), BATTERY 13 3-046-696-01 HOLDER (L) 14 3-046-695-01 CHASSIS 15 3-046-698-01 LID (L), HOLDER

16 3-220-123-01 PLATE (L), HOUSING ORNAMENTAL 17 3-046-707-01 HOUSING (L) 18 3-049-953-21 LID (L), HANGER 19 3-046-705-01 HANGER (L) 20 3-046-699-01 LID (R), HOLDER

* 21 1-678-658-11 RX-SW BOARD

22 3-046-697-02 HOLDER (R) 23 3-046-706-01 HANGER (R) 24 3-049-954-21 LID (R), HANGER 25 3-046-708-01 HOUSING (R)

26 X-3380-845-1 HOUSING (R) ASSY

* 28 A-3062-570-A RX-BASE BOARD, COMPLETE

29 3-049-797-01 LIGHT, MDR GUIDE 31 3-220-124-01 PLATE (R), HOUSING ORNAMENTAL 32 3-046-715-01 TERMINAL, CHARGE

33 3-049-951-01 KNOB, VOLUME 34 3-046-724-01 HOLDER (R), EAR PAD 35 X-3380-341-1 PLATE (R) ASSY, FRONT 36 3-224-569-01 SPRING (ON/OFF) 37 3-223-909-01 SCREW (B2)

38 3-224-572-01 SHEET, HOLOGRAM (L) ADHESIVE 39 3-224-688-01 SHEET (L), LIGHT PREVENTION #1 7-627-553-28 SCREW,PRECISION +P 2X2.5 #2 7-685-104-14 SCREW +P 2X6 TYPE2 NON-SLIT

Page 15

SECTION 6

ELECTRICAL PARTS LIST

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks

NOTE:

• Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set.

• -XX, -X mean standardized parts, so they may have some difference from the original one.

• Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items.

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks

* A-3062-570-A RX-BASE BOARD, COMPLETE

*********************

3-046-715-01 TERMINAL, CHARGE 3-049-951-01 KNOB, VOLUME

< CAPACITOR >

C301 1-164-346-11 CERAMIC CHIP 1uF 16V C302 1-164-005-11 CERAMIC CHIP 0.47uF 25V C303 1-124-259-11 ELECT 4.7uF 20% 16V C304 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V C305 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V

C306 1-124-234-00 ELECT 22uF 20% 16V C307 1-163-059-91 CERAMIC CHIP 0.01uF 10% 50V C308 1-124-234-00 ELECT 22uF 20% 16V C309 1-104-942-11 ELECT 1uF 20% 50V C310 1-104-942-11 ELECT 1uF 20% 50V

C311 1-124-233-11 ELECT 10uF 20% 16V C312 1-126-162-11 ELECT 3.3uF 20% 50V C313 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V C314 1-164-441-11 CERAMIC CHIP 68PF 5% 50V C315 1-163-227-11 CERAMIC CHIP 10PF 0.50PF 50V

C316 1-124-233-11 ELECT 10uF 20% 16V C317 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V C318 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V C319 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V C320 1-163-038-00 CERAMIC CHIP 0.1uF 25V

C321 1-164-346-11 CERAMIC CHIP 1uF 16V C322 1-164-346-11 CERAMIC CHIP 1uF 16V C323 1-163-038-00 CERAMIC CHIP 0.1uF 25V C324 1-124-635-00 ELECT 220uF 20% 6.3V C325 1-124-635-00 ELECT 220uF 20% 6.3V

C326 1-124-635-00 ELECT 220uF 20% 6.3V C327 1-163-038-00 CERAMIC CHIP 0.1uF 25V C328 1-163-038-00 CERAMIC CHIP 0.1uF 25V C329 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V C330 1-124-242-00 ELECT 33uF 20% 25V

C331 1-164-346-11 CERAMIC CHIP 1uF 16V C332 1-163-245-11 CERAMIC CHIP 56PF 5% 50V C333 1-163-220-11 CERAMIC CHIP 3PF 0.25PF 50V C336 1-163-245-11 CERAMIC CHIP 56PF 5% 50V C337 1-163-251-11 CERAMIC CHIP 100PF 5% 50V

C340 1-163-038-00 CERAMIC CHIP 0.1uF 25V C341 1-163-038-00 CERAMIC CHIP 0.1uF 25V C342 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V C343 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V C344 1-163-038-00 CERAMIC CHIP 0.1uF 25V

• CAPACITORS: uF: µF

• RESISTORS All resistors are in ohms. METAL: metal-film resistor METAL OXIDE: Metal Oxide-film resistor F: nonflammable

• COILS uH: µH

C346 1-164-489-11 CERAMIC CHIP 0.22uF 10% 16V C347 1-124-589-11 ELECT 47uF 20% 16V C352 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V C353 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V

C354 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V C355 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V C356 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V C357 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V C359 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V

C361 1-163-251-11 CERAMIC CHIP 100PF 5% 50V C362 1-163-251-11 CERAMIC CHIP 100PF 5% 50V C363 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V C370 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V C371 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V

C372 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V C373 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V C374 1-163-259-91 CERAMIC CHIP 220PF 5% 50V C375 1-164-505-11 CERAMIC CHIP 2.2uF 16V C376 1-163-259-91 CERAMIC CHIP 220PF 5% 50V

C377 1-164-505-11 CERAMIC CHIP 2.2uF 16V C378 1-164-161-11 CERAMIC CHIP 0.0022uF 10% 100V C379 1-164-161-11 CERAMIC CHIP 0.0022uF 10% 100V C380 1-124-259-11 ELECT 4.7uF 20% 16V C381 1-124-259-11 ELECT 4.7uF 20% 16V

C382 1-164-346-11 CERAMIC CHIP 1uF 16V C383 1-164-346-11 CERAMIC CHIP 1uF 16V C384 1-164-161-11 CERAMIC CHIP 0.0022uF 10% 100V C385 1-164-161-11 CERAMIC CHIP 0.0022uF 10% 100V C386 1-163-037-11 CERAMIC CHIP 0.022uF 10% 25V

C387 1-163-037-11 CERAMIC CHIP 0.022uF 10% 25V C388 1-163-255-11 CERAMIC CHIP 150PF 5% 50V C389 1-163-255-11 CERAMIC CHIP 150PF 5% 50V C391 1-164-505-11 CERAMIC CHIP 2.2uF 16V C392 1-164-505-11 CERAMIC CHIP 2.2uF 16V

C393 1-124-233-11 ELECT 10uF 20% 16V C394 1-124-233-11 ELECT 10uF 20% 16V C395 1-164-346-11 CERAMIC CHIP 1uF 16V C396 1-164-346-11 CERAMIC CHIP 1uF 16V C397 1-164-505-11 CERAMIC CHIP 2.2uF 16V

C398 1-164-505-11 CERAMIC CHIP 2.2uF 16V C399 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V C400 1-163-038-00 CERAMIC CHIP 0.1uF 25V C402 1-163-037-11 CERAMIC CHIP 0.022uF 10% 25V C403 1-163-037-11 CERAMIC CHIP 0.022uF 10% 25V

C404 1-164-346-11 CERAMIC CHIP 1uF 16V

• SEMICONDUCTORS In each case, u: µ, for example: uA...: µA... , uPA... , µPA... , uPB... , µPB... , uPC... , µPC... , uPD..., µPD...

When indicating parts by reference number, please include the board name.

MDR-RF975R

RX-BASE

C345 1-163-038-00 CERAMIC CHIP 0.1uF 25V

Page 16

MDR-RF975R

Ver 1.1 2001.06

RX-BASE

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks

< CERAMIC FILTER >

CF301 1-577-588-11 FILTER, CERAMIC CF302 1-577-572-11 FILTER, CERAMIC

R320 1-216-001-00 METAL CHIP 10 5% 1/10W R321 1-216-053-00 METAL CHIP 1.5K 5% 1/10W R322 1-216-069-00 METAL CHIP 6.8K 5% 1/10W R325 1-216-037-00 METAL CHIP 330 5% 1/10W

< DIODE >

D301 8-719-002-81 DIODE 1T363 D303 8-719-056-71 DIODE UDZ-TE-17-2.2B D304 8-719-077-16 LED TLSU124(TPJ52) (power) D310 8-719-975-40 DIODE RB411D

< IC >

IC301 8-752-072-12 IC CXA1538N IC302 8-759-802-75 IC LA4533M IC303 8-759-453-43 IC TC74HC4024AF(EL) IC304 8-759-510-73 IC BA10393F-E2 IC305 8-759-083-94 IC TC7W74FU

IC306 8-759-344-00 IC NJM2100E(TE2) IC307 8-759-384-90 IC TK10691M IC308 8-759-384-90 IC TK10691M IC309 8-759-344-00 IC NJM2100E(TE2)

< JUMPER RESISTER >

JC303 1-216-295-91 SHORT 0 JC304 1-216-295-91 SHORT 0 JC306 1-216-295-91 SHORT 0 JC309 1-216-295-91 SHORT 0 JC311 1-216-295-91 SHORT 0

JC331 1-216-295-91 SHORT 0 JC332 1-216-295-91 SHORT 0 JC333 1-216-295-91 SHORT 0 JC334 1-216-295-91 SHORT 0 JC335 1-216-295-91 SHORT 0

JC336 1-216-295-91 SHORT 0 JC350 1-216-295-91 SHORT 0

< COIL >

L301 1-422-317-31 COIL, AIR-CORE L302 1-412-933-11 INDUCTOR 0.33uH

R330 1-216-001-00 METAL CHIP 10 5% 1/10W R331 1-216-057-00 METAL CHIP 2.2K 5% 1/10W R332 1-216-049-11 RES-CHIP 1K 5% 1/10W R333 1-216-057-00 METAL CHIP 2.2K 5% 1/10W R334 1-216-057-00 METAL CHIP 2.2K 5% 1/10W

R340 1-216-071-00 METAL CHIP 8.2K 5% 1/10W R341 1-216-113-00 METAL CHIP 470K 5% 1/10W R342 1-216-106-00 METAL CHIP 240K 5% 1/10W R343 1-216-099-00 METAL CHIP 120K 5% 1/10W R344 1-216-092-00 RES-CHIP 62K 5% 1/10W

R345 1-216-084-00 METAL CHIP 30K 5% 1/10W R346 1-216-077-00 RES-CHIP 15K 5% 1/10W R347 1-216-070-00 METAL CHIP 7.5K 5% 1/10W R348 1-216-089-91 RES-CHIP 47K 5% 1/10W R349 1-216-073-00 RES-CHIP 10K 5% 1/10W

R350 1-216-077-00 RES-CHIP 15K 5% 1/10W R351 1-216-121-11 RES-CHIP 1M 5% 1/10W R352 1-216-121-11 RES-CHIP 1M 5% 1/10W R353 1-216-077-00 RES-CHIP 15K 5% 1/10W R354 1-216-081-00 METAL CHIP 22K 5% 1/10W

R355 1-216-089-91 RES-CHIP 47K 5% 1/10W R356 1-216-081-00 METAL CHIP 22K 5% 1/10W R357 1-216-081-00 METAL CHIP 22K 5% 1/10W R358 1-216-081-00 METAL CHIP 22K 5% 1/10W R360 1-216-081-00 METAL CHIP 22K 5% 1/10W

R361 1-216-081-00 METAL CHIP 22K 5% 1/10W R362 1-216-073-00 RES-CHIP 10K 5% 1/10W R363 1-216-081-00 METAL CHIP 22K 5% 1/10W R364 1-216-081-00 METAL CHIP 22K 5% 1/10W R366 1-216-029-00 METAL CHIP 150 5% 1/10W

R367 1-216-089-91 RES-CHIP 47K 5% 1/10W R370 1-216-071-00 METAL CHIP 8.2K 5% 1/10W R371 1-216-071-00 METAL CHIP 8.2K 5% 1/10W R372 1-216-071-00 METAL CHIP 8.2K 5% 1/10W R373 1-216-071-00 METAL CHIP 8.2K 5% 1/10W

< TRANSISTOR >

Q301 8-729-903-10 TRANSISTOR FMW1 Q303 8-729-200-72 TRANSISTOR 2SC2712L-TE85L Q304 8-729-200-72 TRANSISTOR 2SC2712L-TE85L Q305 8-729-027-44 TRANSISTOR DTC114TKA-T146 Q306 8-729-200-72 TRANSISTOR 2SC2712L-TE85L

Q307 8-729-200-72 TRANSISTOR 2SC2712L-TE85L

< RESISTER >

R302 1-216-057-00 METAL CHIP 2.2K 5% 1/10W R304 1-216-061-00 RES-CHIP 3.3K 5% 1/10W R305 1-216-061-00 RES-CHIP 3.3K 5% 1/10W R308 1-216-057-00 METAL CHIP 2.2K 5% 1/10W R309 1-216-097-11 RES-CHIP 100K 5% 1/10W

R310 1-216-061-00 RES-CHIP 3.3K 5% 1/10W R312 1-216-077-00 RES-CHIP 15K 5% 1/10W R314 1-216-097-11 RES-CHIP 100K 5% 1/10W R315 1-216-001-00 METAL CHIP 10 5% 1/10W R316 1-216-001-00 METAL CHIP 10 5% 1/10W

R318 1-216-089-91 RES-CHIP 47K 5% 1/10W

R374 1-216-064-00 METAL CHIP 4.3K 5% 1/10W R375 1-216-064-00 METAL CHIP 4.3K 5% 1/10W R376 1-216-097-11 RES-CHIP 100K 5% 1/10W R377 1-216-097-11 RES-CHIP 100K 5% 1/10W R378 1-216-063-91 RES-CHIP 3.9K 5% 1/10W

R379 1-216-057-00 METAL CHIP 2.2K 5% 1/10W R380 1-216-049-11 RES-CHIP 1K 5% 1/10W R381 1-216-049-11 RES-CHIP 1K 5% 1/10W R382 1-216-057-00 METAL CHIP 2.2K 5% 1/10W R383 1-216-057-00 METAL CHIP 2.2K 5% 1/10W

R384 1-216-067-00 METAL CHIP 5.6K 5% 1/10W R385 1-216-067-00 METAL CHIP 5.6K 5% 1/10W R386 1-216-065-91 RES-CHIP 4.7K 5% 1/10W R387 1-216-065-91 RES-CHIP 4.7K 5% 1/10W R390 1-216-097-11 RES-CHIP 100K 5% 1/10W

R391 1-216-097-11 RES-CHIP 100K 5% 1/10W R392 1-216-063-91 RES-CHIP 3.9K 5% 1/10W R393 1-216-057-00 METAL CHIP 2.2K 5% 1/10W R394 1-216-061-00 RES-CHIP 3.3K 5% 1/10W R395 1-216-061-00 RES-CHIP 3.3K 5% 1/10W

R396 1-216-083-00 METAL CHIP 27K 5% 1/10W

Page 17

MDR-RF975R

RX-BASE

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks

R397 1-216-083-00 METAL CHIP 27K 5% 1/10W R398 1-216-073-00 RES-CHIP 10K 5% 1/10W R399 1-216-073-00 RES-CHIP 10K 5% 1/10W R400 1-216-025-11 RES-CHIP 100 5% 1/10W

R401 1-216-025-11 RES-CHIP 100 5% 1/10W R403 1-216-073-00 RES-CHIP 10K 5% 1/10W R404 1-216-073-00 RES-CHIP 10K 5% 1/10W

< VARIABLE RESISTOR >

RV301 1-241-763-11 RES, ADJ, CARBON 4.7K (FREE RUN FREQ.) RV302 1-227-189-11 RES, VAR CARBON 20K/20K (VOL )

< SWITCH >

S301 1-771-980-11 SWITCH, TACTILE (TUNE)

RX-SW

******************************************************

1-678-658-11 RX-SW BOARD

***********

< SWITCH >

S302 1-572-467-61 SWITCH, PUSH (1 KEY) (POWER ON/OFF)

******************************************************

MISCELLANEOUS

*************

6 X-3380-120-1 DRIVER ASSY 8 1-756-109-11 BATTERY, NICKEL HYDROGEN

Page 18

MDR-RF975R

REVISION HISTORY

Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page.

Ver. Date Description of Revision

1.1 2001.06 Correction of electrical adjustment and electrical parts list. (ENG-01007)

1.0 2001.05 New