Sony MDR-IF630R Bedienungsanleitung

MDR-IF630R

US Model

AEP Model

UK Model

E Model

Tourist Model

SERVICE MANUAL

HEADPHONES

Headphones MDR-IF630R

Transmitter TMR-IF630R

MDR-IF630R is the component model block one in the MDR-IF630RK.

COMPONENT MODEL NAME FOR MDR-IF630RK

SPECIFICATIONS

Built-in rechargeable batteries

Model name NH-AAC

Type Ni-MH

Voltage 1.2 V

Capacity 1000 mAh

Headphones

Type Closed, dynamic

Driver unit 30 mm dia. with neodymium

magnet

Frequency response

12 – 24,000 Hz

Power source DC 2.4 V: Built-in rechargeable

batteries

Mass Approx. 310 g (10.9 oz)

Design and specifications are subject to change without

notice.

Ver 1.0 2000. 12

— 2 —

SECTION 1

GENERAL

This section is extracted

from instruction manual.

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.

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.

Check the remaining power of the

headphone batteries

Pull up the suspender, and check that the

headphones’power indicator lights in red. You

can now use the headphones.

Charge the batteries or install new batteries, if the

power indicator light is weak or turned off and

the sound become distorted or has a lot of noise.

POWER

3Adjust the volume.

High

Low

Audio mode switch

Depress the audio mode switch (VOICE mode) to

emphasize the human voice. Press to release it

(NORMAL mode) for normal tone quality.

Audio mode switch

NORMAL VOICE

—3 —

SECTION 2

DISASSEMBLY

2-2. RX BASE BOARD

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

•The equipment can be removed using the following procedure.

Driver (R side) RX BASE board

Driver (L side) RX CHR board

Set Lid (R), holder Hanger (R) RX SW board, Holder (R)

Lid (L), holder Hanger (L) Holder (L)

2-1. DRIVER (R SIDE)

Driver (R side)

From RX BASE board

Four screws

(+P2

Solder the each lead wires

directly to the position as

shown while being

cautions of colors

Precaution for installation

Pad, ear

Plate (R) assy, front

Remove the two solderings

Natural

Red

from RX SW board (–) (natural)

Head band (rear) (natural)

Driver (natural)

Driver (red) Head band (front) (green)

Head band (front) (natural)

Head band (front) (black)

Head band (rear) (red)

from RX SW board (+) (black)

RX BASE board

Button, sound selection

Knob, volume

Two screws (+P2

Remove the ten solderings

Solder the each lead wires directly to the position as

shown while being cautions of colors

Precaution for installation

—4 —

2-3. LID (R), HOLDER

2-4. HANGER (R)

Housing (R) assy

Claw

Lid (R), holder

Two screws (+P2

Lid (R) hange

Hanger (R)

HANGER (R)

Groove

From head band (rear)

From RX SW board

From head band

(front)

Solder the each lead wires directly to the position as

shown while being cautions of colors

Precaution for installation

—5 —

2-5. RX SW BOARD, HOLDER (R)

2-6. DRIVER (L SIDE)

Holder (R)

Natural

RX SW board

Remove the two solderings

Cushion assy, head

Two screws (+P2

2.5)

Head band (front)

Head band (rear)

Chassis

Screw (+P2

Two springs

Driver (L side)

From head band (rear)

Natural

Green

Four screws (P2

Pad, ear

Plate (L) assy, front

Remove the two solderings

Solder the each lead wires

directly to the position as

shown while being

cautions of colors

Precaution for installation

—6 —

2-8. LID (L), HOLDER

2-7. RX CHR BOARD

Two screws (+P2

Screw

(+P2

Terminal (–), battery

RX CHR board

Terminal (–), battery

RX CHR board

Terminal (+), batter

Terminal (+), battery

Remobe the eight soderings

Two batteries, nickel hydrogen

Box assy, battery

Two terminals, charge

Head band (front) (natural)

Head band (front) (black)

Head band (rear) (natural)

Head band (rear) (red)

Solder the each lead wires directly to the position as

shown while being cautions of colors

Precaution for installation

Claw

Housing (L) ssy

Lid (L), holder

Two screws

(+P2

—7 —

2-9. HANGER (L)

2-10. HOLDER (L)

Lid (L), hanger

Hanger (L)

Groove

From head band (rear)

From head band (front)

Solder the each lead wires directly to the position as

shown while being cautions of colors

Precaution for installation

Holder (L)

Cushion assy, head

Two screws (+P2

2.5)

Head band (front)

Head band (rear)

Chassis

Screw (+P2

—8 —

SECTION 3

ELECTRICAL ADJUSTMENTS

Notes:

1. The adjustments should be performed in the order given. (As a

generalrulethetransmittersection(TMR-IF630R)adjustments

shouldbe completed before performing the headphones section

(MDR-IF630R) adjustment.)

The adjustment and measurements should be performed for both

L-ch and R-ch unless otherwise indicated.

3. L-ch adjustment should be completed before performing R-ch

adjustment

4. Supply 9V dc to the transmitter section (TMR-IF630R) and 2.4 V

dcto theheadphonessection (MDR-IF630R)asthe powervoltage.

HEADPHONES SECTION 0 dBV=315 mVrms

Note:

1. On adjusting the headphones section (MDR-IF630R), use the

transmitter (TMR-IF630R) as a jig.

[ TUNING ADJUSTMENT ]

Preparation:

1. Feed a signal to jig (TMR-IF630R) and connect a power supply

to DC IN jack (J4).

2. Supply DC 2.4 V between VCC and GND on the RX BASE

board.

3. Set RV301 (VOL) on the RX BASE board to the maximum

positon.

4. Set SW301 on the RX BASE board to OFF (NORMAL).

Connection:

Adjustment Procedure:

1. Connect the distortion meter to L+/L–(L-ch) and R+/R–(R-ch).

2. Adjust with L204 (L-ch) and L104 (R-ch) on the RX BASE

board to minimize the reading on the distortion meter.

L-ch L204 minimum

R-ch L104 minimum

AUDIO IN B

jack (J1)

1kHz 315mV (

10dBV)

600

Trans-

mitter

jig

AT T

AF OSC

RX BASE board

L+/L–

R+/R–

–

100

F/16V

distortion mete

Adjustment Location :

–RX BASE BOARD (Conductor side)–

L204

Tuning adjustment

(L-ch)

R+

(R-ch)

R-

L+

(L-ch)

L-

(VCC)

(GND)

L104

Tuning adjustment

(R-ch)

MDR-IF630R

4-1. BLOCK DIAGRAM

—9 — — 10 —

SECTION 4

DIAGRAMS

(IR

SENSOR) D301,

D302

(IR

SENSOR) D303,

D304

D306

NI-MH

1.2Vx2

Q301-Q303

RF AMP

Q304

BUFFER

(POWER) S10

SW301(1/2)

VOLSOUND MODE

RV301(1/2)

LPF MIXER

L203 2.3 MHz B.P.F L204 2.3MHz DET. COIL

MIXER

OSCILLATOR

DEMODULATOR

LIMITER

MIXER

OUT AF

OUT

3LIMITER

5QUAD COIL

9 6

SCAN

CONTROL 13

MUTE

AF AMP.

IC201

MIXER / LIMITER / DEMODULATOR

IC202

EXPANDER

IC203

VOICE ENHANCER IC204

POWER AMP

SP201

SPEAKER

(L-CH)

OUT

Q201

-1

VREF

21 G.CELL

LPF MIXER

L103 2.8MHz B.P.F L104 2.8MHz DET. COIL

MIXER

OSCILLATOR

DEMODULATOR

LIMITER

MIXER

OUT AF

OUT

3LIMITER

5QUAD COIL

9 6

SCAN

CONTROL 13

MUTE

AF AMP.

IC101

MIXER / LIMITER / DEMODULATOR

IC301(2/2)

AMP.

IC102

EXPANDER

IC103

VOICE ENHANCER IC104

POWER AMP

SP101

SPEAKER

(R-CH)

OUT

Q101

-1

VREF

67 G.CELL

Signal path.

: RF

: ANALOG

TMR-IF630R

(BATTERY CHARGER)

fff

SW301(2/2) RV301(2/2)

VOICE

NORMAL

–

IC301(1/2)

AMP.

MDR-IF630R

4-2. SCHEMATIC DIAGRAM

—11 — — 12 —

•See page 15 for IC Block Diagrams.

Note on Schematic Diagram:

•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 Ωand 1/4W or less unless

otherwise specified.

•A: B+ Line.

•Power voltage is dc 2.4 V and fed with regu-

lated dc power supply from battery terminal.

•Voltages are taken with a VOM (Input imped-

ance 10 MΩ).

Voltage variations may be noted due to normal

production tolerances.

•Signal path.

F: ANALOG

J:RF

SOUND MODE

VOICE

NORMAL

636 mVp-p

434 nsec

IC201 3

IC101 3

600 mVp-p

358 nsec

VOLT/DIV : 200 mV

TIME/DIV : 200 ns

VOLT/DIV : 200 mV

TIME/DIV : 200 ns

•Waveforms

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