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Sony MDR-NC6 Service Manual
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Sony MDR-NC6 Service Manual

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SERVICE MANUAL
Ver 1.0 2004.10
SPECIFICATIONS
General
Type
Open air, dynamic
Driver units
38 mm, dome type
Power handling capacity
100mW
Impedance
20 Ω at 1 kHz (when the power is on)
65 Ω at 1 kHz (when the power is off)
Sensitivity
106 dB/mW (when the power is on)
104 dB/mW (when the power is off)
Frequency response
30 – 15,000 Hz
Frequency range of active noise attenuation
40 – 1,500 Hz, more than 10 dB at 300 Hz
Cord
1.5m (59
1
/
inches)
8
Plug
Gold plated L-sharped stereo mini plug
Power source
DC 1.5 V, 1 ⋅ R03 (size AAA) battery
Mass
Approx. 150 g (5.3 oz) including battery
Battery life
Battery
Sony alkaline LR03 (size AAA)/AM4(N) battery
Sony manganese R03/UM-4 (NU) (size AAA) battery
*
1
1 kHz, 1 mW + 1 mW input
*
2
Time stated above may vary, depending on the temperature or conditions of use.
When to replace the battery
Replace the battery with a new one when the POWER indicator dims. The noise canceling
feature may not work correctly if battery power is low.
Supplied accessories
Plug adaptor for in-flight use* (single/dual) (1)
Carrying case (1)
Operating Instructions (1)
* May not be compatible with some in-flight music services.
Design and specifications are subject to change without notice.
Sony Corporation
9-879-196-01
Personal Audio Company
2004J05-1
Published by Sony Engineering Corporation
© 2004.10
MDR-NC6
1
Approx. hours*
2
30 hours*
2
15 hours*
Note on chip component replacement
• Never reuse a disconnected chip componet
• Notice that the minus side of a teamtalum capacitor may be damaged by
heat
Tourist Model
NOISE CANCELING
HEAD PHONES

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  • Page 1 Approx. hours* Sony alkaline LR03 (size AAA)/AM4(N) battery 30 hours* Sony manganese R03/UM-4 (NU) (size AAA) battery 15 hours* 1 kHz, 1 mW + 1 mW input Time stated above may vary, depending on the temperature or conditions of use.

  • Page 2: Section 1 General

    Plug adaptor** To headphone jack on airplane seats * WALKMAN is a trademark of Sony Corporation. **May not be compatible with some in-flight music services. Turn on the power of the headphones. The POWER indicator lights in red. When the power is turned on, ambient noise is reduced, and you can listen to music more clearly at a lower volume.

  • Page 3: Section 2 Disassembly

    MDR-NC6 SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. 2-1. MAIN (L), (R) BOARD 4 claw 8 two rear lid stoppers Note: On installation of MAIN (R) board, 5 housing cap adjust the position of switch (S1) sub assy and switch knob (R-CH).

  • Page 4: Section 3 Electrical Adjustment

    MDR-NC6 SECTION 3 SECTION 4 ELECTRICAL ADJUSTMENT DIAGRAMS • Note for Printed Wiring Boards and Schematic Diagrams NOISE CANCELING AMOUNT ADJUSTMENT Preparation: Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. (p: pF) 50 WV or less are not indicated except for electrolytics and tantalums.
  • Page 5 MDR-NC6 4-1. PRINTED WIRING BOARDS MAIN (L) BOARD MAIN (R) BOARD POWER SFR2 SFR1 MIC2 MIC1 (R-CH) (POWER) (L-CH) – – 2B E 1B JR003 – (L-CH) (R-CH) – 1B E 2B CLEAR CLEAR • Semiconductor DRY BATTERY SIZE "AAA"...
  • Page 6 MDR-NC6 • See page 4 for Waveforms 4-2. SCHEMATIC DIAGRAM BOARD POWER AMP NJM2076 2SA1182 150k L-AUDIO R-AUDIO (L-CH) 2SA1182 +VCC 0.47 0.47 6.8k R-AUDIO DTC323TK DTC323TK 0.047 6.3V 5.6k 0.022 1.5k MIC1 Q1,3,5,7 (L-CH) SWITCHING 470k 6.3V 6.3V SFR1...

  • Page 7: Exploded Views

    MDR-NC6 SECTION 5 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they may have some difference from the original are seldom required for routine service. Some one. delay should be anticipated when ordering •...

  • Page 8: Section 6 Electrical Parts List

    MDR-NC6 SECTION 6 MAIN (L) MAIN (R) ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they parts list may be different from the parts are seldom required for routine service.
  • Page 9 MDR-NC6 MAIN (R) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark MISCELLANEOUS < LED > ************** 8-719-060-79 LED L-1034ID (POWER) X-2024-979-1 SUB (R) ASSY, DRIVER UNIT (including SP2 (R-CH)) < IC > X-2024-980-1 SUB (L) ASSY, DRIVER UNIT...

  • Page 10: Revision History

    MDR-NC6 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...

  • Page 11: Parts List

    2-148-074-01 PAD, EAR 2-149-995-11 MANUAL, INSTRUCTION (ENGLISH, FRENCH, SPANISH) (US) 2-589-850-01 MANUAL, INSTRUCTION (ENGLISH, FRENCH, SPANISH, GERMAN, ITALIAN, PORTUGUESE, HUNGARIAN, POLISH, CZECH, RUSSIAN, SLOVAKIAN) (Canadian, AEP) STEREO HEADPHONES Sony Corporation 9-879-145-02 Personal Audio Company 2005B05-1 Published by Sony Engineering Corporation © 2005.02...
  • Page 12 MDR-NC6 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 2004.08...

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