Sony MDR-Z7 User manual

SERVICE MANUAL
Sony Corporation
Published by Sony Techno Create Corporation
9-896-052-01
2014I33-1
© 2014.09
MDR-Z7
SPECIFICATIONS
STEREO HEADPHONES
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
Ver. 1.0 2014.09
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 specications are subject to change without notice.

MDR-Z7
2
SECTION 1
SERVICING NOTES
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 –
The SERVICING NOTES contains important information for servicing. Be sure to read this section before repairing the unit.

MDR-Z7
3
SECTION 2
DISASSEMBLY
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
SET
2-3. HOUSING BLOCK
(Page 5)
2-4. FRONT PLATE ASSY
(Page 5)
2-5. HOUSING ASSY, HANGER
(Page 6)
2-2. EAR PAD, EAR PAD HOLDER
(Page 4)
Note: Please detach the CABLE WITH PLUG beforehand.

MDR-Z7
4
Note: Follow the disassembly procedure in the numerical order given.
2-2. EAR PAD, EAR PAD HOLDER
Note 1: L-ch and R-ch can be similarly disassembled.
The illustration of R-ch is used for explanation.
1Turn over the ear pad. 2screw (P2)
ditch
housing block ear pad block
boss
6ear pad holder
5ear pad
hole
ditch
4Remove the protrusion
from the ear pad hole.
3Remove the ear pad block
in the direction of the arrow.
Turn in the direction of
the arrow until it stops.
Inside color is [black]. Inside color is [red].
–L-ch ––R-ch –
Note 2: When installing the ear pad block to the housing block,
align the ear pad block boss with the housing block ditch.
Note 3: When installing the ear pad, check the inside color.

MDR-Z7
5
2-3. HOUSING BLOCK
Note:L-ch and R-ch can be similarly disassembled.
The illustration of R-ch is used for explanation.
2-4. FRONT PLATE ASSY
Note: L-ch and R-ch can be similarly disassembled.
The illustration of R-ch is used for explanation.
1ornamental screw
(M1.7)
1ornamental screw
(M1.7)
2shaft stopper
3twist holder
4axis cushion
5housing block
1three screws
(P2)
1three screws
(P2)
4front plate assy
2Remove the front plate assy
in the direction of the arrow.
3Remove the solder
[blonze]
3Remove the solder
[red]
boss
boss
ditch
ditch
front plate assy
marking
:LUHVHWWLQJ
[bronze]
(no marking side)
Direction in which
to apply the solder.
[red]
(marking side)
cable with jack

MDR-Z7
6
2-5. HOUSING ASSY, HANGER
Note 1: L-ch and R-ch can be similarly disassembled.
The illustration of R-ch is used for explanation.
4housing assy
2two screws
(P2)
3housing holder
3housing holder 2two screws
(P2)
6hanger
5axis cushion
5axis cushion
1rear seal
Note 2: When installing the rear seal,
affix the glossy surface to
the housing assy.
groove
axis cushion
Align the directions
of the slopes.
$[LVFXVKLRQDQG+DQJHUKROGHUVHWWLQJ
hanger
hanger holder
–KDQJHUERWWRPYLHZ–

7
MDR-Z7
SECTION 3
EXPLODED VIEWS
1 4-541-036-01 PAD (R), EAR (R-ch)
2 4-541-034-01 HOLDER, EAR PAD
3 3-080-204-31 SCREW, TAPPING, P2
4 3-080-205-21 SCREW, TAPPING, P2
5 4-541-023-01 SEAL, REAR
6 4-541-025-01 HOLDER, HANGER
7 4-541-076-01 CUSHION, AXIS
8 4-541-013-01 HANGER (R) (R-ch)
9 4-540-997-01 HOLDER, TWIST
10 4-540-998-01 STOPPER, SHAFT
11 4-541-006-01 ORNAMENTAL SCREW M1.7 (TAPPING)
DR2 X-2590-515-1 PLATE (R) ASSY, FRONT (SV) (Including Driver)
(R-ch)
HJ2 X-2590-513-1 HOUSING (R) ASSY (SV)
(Including Cable with jack) (R-ch)
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
Note:
• -XX and -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 ser-
vice. Some delay should be anticipated
when ordering these items.
• The mechanical parts with no reference
number in the exploded views are not sup-
plied.
• Color Indication of Appearance Parts Ex-
ample:
KNOB, BALANCE (WHITE) . . . (RED)

Parts Color Cabinet’s Color
3-1. HOUSING (R-ch) SECTION
• Front view
–L-ch –
housing (L-ch), head band section
–R-ch –
10
11
11
9
7
8
6
7
6
74
4
44
5
2
4
3
4
1
4
4
4
4
HJ2
DR2

8
MDR-Z7
3-2. HOUSING (L-ch), HEAD BAND SECTION
• Rear view
51 4-541-035-01 PAD (L), EAR (L-ch)
52 4-541-034-01 HOLDER, EAR PAD
53 3-080-204-31 SCREW, TAPPING, P2
54 3-080-205-21 SCREW, TAPPING, P2
55 4-541-023-01 SEAL, REAR
56 4-541-025-01 HOLDER, HANGER
57 4-541-076-01 CUSHION, AXIS
58 4-541-012-01 HANGER (L) (L-ch)
59 4-540-997-01 HOLDER, TWIST
60 4-540-998-01 STOPPER, SHAFT
61 4-541-006-01 ORNAMENTAL SCREW M1.7 (TAPPING)
DR1 X-2590-514-1 PLATE (L) ASSY, FRONT (SV) (Including Driver)
(L-ch)
HB1 X-2590-510-1 BAND ASSY, HEAD (SV) (US, CND, E, AUS, CH)
(See Note)
HB1 X-2590-511-1 BAND ASSY, HEAD (SV) (AEP, UK) (See Note)
HJ1 X-2590-512-1 HOUSING (L) ASSY (SV) (Including Cable with jack)
(L-ch)
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
–L-ch –
–R-ch –
HB1
59
57
58
56
57 54
55
52
54
53
51
54
54
54
54
54
60
61
61
56
57
54
54
54
HJ1
DR1
Note: A serial number is marked on the unit’s head
band arm. Therefore, when the head band assy
is replaced, the serial number changes.

9
MDR-Z7
Ref. No. Part No. Description Remark
SECTION 4
ACCESSORIES
4-538-073-11 MANUAL, INSTRUCTION
(ENGLISH, FRENCH, SPANISH) (US, CND)
4-538-073-21 MANUAL, INSTRUCTION
(ENGLISH, FRENCH, GERMAN, SPANISH,
DUTCH, ITALIAN, PORTUGUESE, POLISH,
GREEK, CZECH, HUNGARIAN, BULGARIAN,
SLOVAK, SLOVENIAN, ROMANIAN) (AEP, UK)
4-538-073-31 MANUAL, INSTRUCTION
(ENGLISH, RUSSIAN, TRADITIONAL CHINESE,
KOREAN, UKRAINIAN) (E, AUS)
4-538-073-41 MANUAL, INSTRUCTION (SIMPLIFIED CHINESE)
(CH)
501 1-566-410-41 ADAPTOR, PLUG (Gold-plated unimatch plug
adaptor (stereo phone plug ystereo mini jack))
502 1-848-516-11 CABLE WITH PLUG (Headphone cable
(Approx. 3 m, silver-coated OFC strands,
gold-plated stereo mini plug)) (AEP, UK)
502 1-848-516-21 CABLE WITH PLUG (Headphone cable
(Approx. 3 m, silver-coated OFC strands,
gold-plated stereo mini plug))
(US, CND, E, AUS, CH)
503 1-848-517-11 CABLE WITH PLUG (BALANCED)
(Balanced-connection headphone cable
(Approx. 2 m, silver-coated OFC strands,
3-pole mini plug x 2)) (AEP, UK)
503 1-848-517-21 CABLE WITH PLUG (BALANCED)
(Balanced-connection headphone cable
(Approx. 2 m, silver-coated OFC strands,
3-pole mini plug x 2)) (US, CND, E, AUS, CH)
502
Headphone cable
(Approx. 3 m, silver-coated OFC strands, gold-plated stereo mini plug)
503
Balanced-connection headphone cable
(Approx. 2 m, silver-coated OFC strands, 3-pole mini plug × 2)
501
Gold-plated unimatch plug adaptor
(stereo phone plug ystereo mini jack)

MDR-Z7
REVISION HISTORY
Ver. Date Description of Revision
1.0 2014.09 New