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Sony MDR-NC11A - Noise Canceling Headphone, Service Manual, Page: 7 / 12

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Sony MDR-NC11A - Noise Canceling Headphone Service Manual Download Page 7

MDR-NC11A

7

7

MDR-NC11A

4-1. PRINTED  WIRING  BOARD

IC101

IC102

MAIN BOARD

   

(COMPONENT SIDE)

1-683-881-

12

(12)

1-683-881-

12

(12)

JC101

1

3

5

4

2B

1B 2C

1C 1C

1B

E

2B

2C

−

1

−

2

POWER

S101

OFF         ON

POWER ON

D201

DRY BATTERY

SIZE "AAA"

(IEC DESIGNATION R03)

1PC. 1.5V

MAIN BOARD

   

(CONDUCTOR SIDE)

P1

(LINE INPUT)

RED

WHT

BLK

VOL

RV101

1

2

3

4

5

6

A

B

C

D

E

−

1

−

2

E

(L-ch)

(R-ch)

BLU

YEL

GRN

RED/BRN

GRN/BRN

BRN

BRN

(L-ch)

(R-ch)

RED

HP1

(MICROPHONE/HEADPHONE)

•

Semiconductor
Location

Ref. No. Location

D201

B-5

IC101

B-3

IC102

B-3

Q2

D-4

Q52

D-4

Q101

D-4

Q201

B-5

Q202

B-4

Summary of Contents for MDR-NC11A - Noise Canceling Headphone

Page 1: ...acity 50 mW Impedance 20 ohms at 1 kHz when the power is on 8 ohms at 1 kHz when the power is off Sensitivity 102 dB mW when the power is on 98 dB mW when the power is off Frequency response 10 22 000 Hz Frequency range of active noise attenuation 50 1 500 Hz more than 10 dB at 300 Hz Power source DC 1 5 V 1 R03 size AAA battery Mass Approx 47 g 1 7 oz including batterybox cord and battery Supplie...

Page 2: ...2 MDR NC11A SECTION 1 SERVICING NOTE red white black brown blue yellow green red main board conductor side WIRING DIAGRAM ...

Page 3: ...music Turn off the power of the headphones Notes The noise canceling function is only effective for noise in the low frequency band Although noise is reduced it is not canceled completely Do not cover the microphone of the headphones with your hands The noise canceling function may not work properly The noise canceling function may not work properly unless the headphones are put on firmly You can ...

Page 4: ...n on the POWER switch 3 With this headphones mounted adjust the RV1 L ch and RV51 R ch so that the volume from the speaker becomes lowest aurally Note When the headphones are not covered with the ear pieces completely the adjustment may not be performed correctly Make sure that the ear pieces cover the headphone completely Adjustment Location MAIN BOARD Component Side amplifier speaker AF oscillat...

Page 5: ...WER OFF Voltages are taken with aVOM Input impedance 10 MΩ Voltage variations may be noted due to normal produc tion tolerances Waveforms are taken with a oscilloscope Voltage variations may be noted due to normal produc tion tolerances Circled numbers refer to waveforms Signal path F LINE INPUT POWER ON J LINE INPUT POWER OFF Note on Printed Wiring Board X parts extracted from the component side ...

Page 6: ... 4 µs 70 mVp p 2 Q201 1 Base 200 mV DIV 20 µs DIV 36 4 µs 1 1 Vp p 4 Q201 2 Base 200mV DIV 20 µs DIV 36 4 µs 0 8 Vp p 3 Q201 1 Collector Q202 1 Base 200mV DIV 20 µs DIV 36 4 µs 0 8 Vp p 5 Q201 2 Collector Q202 1 Collector Q202 2 Base 200 mV DIV 20 µs DIV 36 4 µs 1 3 Vp p 7 Q202 2 Collector 5 mV DIV 20 µs DIV 36 4 µs 20 mVp p ...

Page 7: ...OWER S101 OFF ON POWER ON D201 DRY BATTERY SIZE AAA IEC DESIGNATION R03 1PC 1 5V MAIN BOARD CONDUCTOR SIDE P1 LINE INPUT RED WHT BLK VOL RV101 1 2 3 4 5 6 A B C D E 1 2 E L ch R ch BLU YEL GRN RED BRN GRN BRN BRN BRN L ch R ch RED HP1 MICROPHONE HEADPHONE Semiconductor Location Ref No Location D201 B 5 IC101 B 3 IC102 B 3 Q2 D 4 Q52 D 4 Q101 D 4 Q201 B 5 Q202 B 4 ...

Page 8: ... 100 6 3V 2 2k 6 8k 0 22 2200p 10k 0 22 18 10k 0 47 0 47 10k 0 22 18 0 22 0 22 10k 2 2k 6 8k 0 22 2200p 0 01 2200p 2200p 10 10V 4 7 0 1 0 1 4 7 10 10V 0 1 0 01 47k 0 0 1 10 10V 0 01 27 2200p 10k 2 2 8 2 220 4V 220 4V 8 2 2 2 0 1 2200p 10k 10k 0 047 4 7k 1k 2 7k 47k 1 2 2k 4 7k 470k 1 0 1 2 2k 1 LA4537M 500 500 1 820 4 7k 1 CL 196HR 10 10V 10 10V L ch R ch 1 2 1 2 POWER ON POWER AMP VIN VOUT S D GN...

Page 9: ...14 3 255 458 01 SCREW DIA 2 TAPPING HP1 A 1086 288 A HEADPHONE ASSY for BLACK HP1 A 1086 705 A HEADPHONE ASSY for BLUE HP1 A 1133 848 A HEADPHONE ASSY for WHITE P1 X 2109 406 1 CORD ASSY PLUG for BLACK BLUE P1 X 2109 407 1 CORD ASSY PLUG for WHITE Items marked are not stocked since they are seldom required for routine service Some delay should be anticipated when ordering these items The mechanica...

Page 10: ...10 25V C201 1 125 837 11 CERAMIC CHIP 1uF 10 6 3V C202 1 162 966 11 CERAMIC CHIP 0 0022uF 10 50V C203 1 162 966 11 CERAMIC CHIP 0 0022uF 10 50V C204 1 107 826 11 CERAMIC CHIP 0 1uF 10 16V LED D201 8 719 077 09 LED CL 196HR CD T POWER ON IC IC101 8 759 835 58 IC LA4537M TE L E IC102 6 707 191 01 IC TK70203CS2G0L SHORT JC101 1 216 864 11 SHORT CHIP 0 TRANSISTOR Q2 8 729 602 21 TRANSISTOR 2SC4154 F Q...

Page 11: ... ADJ CERMET 2 2K RV101 1 227 456 11 RES VAR CARBON 500 500 VOL SWITCH S101 1 771 337 21 SWITCH SLIDE POWER MISCELLANEOUS HP1 A 1086 288 A HEADPHONE ASSY BLACK HP1 A 1086 705 A HEADPHONE ASSY BLUE HP1 A 1133 848 A HEADPHONE ASSY WHITE P1 X 2109 406 1 CORD ASSY PLUG for BLACK BLUE P1 X 2109 407 1 CORD ASSY PLUG for WHITE ACCESSORIES 1 477 125 12 ADAPTOR PLUG DUAL for in flight use 3 046 415 11 PIECE...

Page 12: ...on at the upper right on the revised page allows you to jump to the next revised page Ver Date Description of Revision 1 0 2004 10 New 1 1 2005 08 Addition of US model Revision of electrical parts ENG 05002 1 2 2006 03 Addition of Canadian AEP E models 1 3 2006 11 Addition of EAR PIECE M on ACCESSORIES SPM 06129 ...

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