Sony MDR-27 User Manual
MDR-Z7
SERVICE MANUAL
Ver. 1.0 2014.09
SPECIFICATIONS
Type Closed, dynamic (circum-aural)
Driver unit 70 mm, dome type (CCAW Voice Coil)
Power handling capacity 2,000 mW (IEC*)
Impedance 70 Ω at 1 kHz
Sensitivity 102 dB/mW
Frequency response 4 Hz - 100,000 Hz
Mass Approx. 335 g without cable
Supplied accessories
Headphone cable (Approx. 3 m, silver-coated OFC strands, gold-plated stereo mini
plug) (1)
Balanced-connection headphone cable (Approx. 2 m, silver-coated OFC strands,
3-pole mini plug × 2) (1)
Gold-plated unimatch plug adaptor (stereo phone plug stereo mini jack) (1)
Operating Instructions (1)
* IEC = International Electrotechnical Commission
Design and specications are subject to change without notice.
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
9-896-052-01
2014I33-1
2014.09
©
STEREO HEADPHONES
Sony Corporation
Published by Sony Techno Create Corporation
MDR-Z7
SECTION 1
SERVICING NOTES
The SERVICING NOTES contains important information for servicing. Be sure to read this section before repairing the unit.
DESTINATION ABBREVIATIONS
The following abbreviations for model destinations are used in this
service manual.
• Abbreviations
AUS : Australian model
CH : Chinese model
CND : Canadian model
NOTE OF REPLACING THE HEAD BAND ASSY
A serial number is marked on the unit’s head band arm.
Therefore, when the head band assy is replaced, the serial number
changes.
serial number
– L-ch –
– R-ch –
2
DISASSEMBLY
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
MDR-Z7
SECTION 2
SET
2-2. EAR PAD, EAR PAD HOLDER
(Page 4)
2-3. HOUSING BLOCK
(Page 5)
2-4. FRONT PLATE ASSY
(Page 5)
2-5. HOUSING ASSY, HANGER
(Page 6)
Note: Please detach the CABLE WITH PLUG beforehand.
3
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