Sony MDRD-777-LP, MDRD-777-SL Service manual
MDR-D777LP/D777SL
SERVICE MANUAL
Ver. 1.1 2007.02
SPECIFICATIONS
Type
Closed, dynamic
Driver units
40 mm, dome type
Power handling capacity
1,500 mW (IEC*)
Impedance
24 Ω at 1 kHz
Sensitivity
106 dB/mW
Frequency response
8 - 80,000 Hz
US Model
Canadian Model
AEP Model
MDR-D777LP
E Model
MDR-D777SL
Photo : MDR-D777SL
Cord
Approx. 1.2 m (47 1/4 in) (D777LP) / 0.6m (D777SL)
single sided OFC
Mass
Approx. 166 g (6 oz) (without cord)
Plug
Gold-plated stereo mini plug, L type (D777LP)
Supplied accessories
Carrying pouch (1) / Operating Instructions (1)
Extension cord (D777SL) (1)
* IEC = International Electrotechnical Commission
z DRIVER TERMINAL
Marking (+ side)
Plus terminal is making
with felt tip pen.
(The position uncertainty)
Relay terminals
(No inside connection)
Design and specifications are subject to change without notice.
SECTION 1
SERVICING NOTES
Note : Position of puls terminal may become a change
DRIVER
Copper (GND)
Marking
(L-CH)
Red (R-CH)
Marking
Green
(L-CH)
Copper
(GND)
STEREO HEADPHONS
Stereo mini plug
DRIVER
(R-CH)
Copper
(GND)
9-887-420-02
2007B02-1
© 2007.02
Sony Corporation
Personal Audio Division
Published by Sony Techno Create Corporation
MDR-D777LP/D777SL
EXPLODED VIEWS
NOTE:
• -XX, -X mean standardized parts, so they
may have some difference from the
original one.
2-1. HEADBAND, HOUSING (L) SECTION
14
• Items marked “ * ”are not stocked since
they are seldom required for routine
service. Some delay should be anticipated
when ordering these items.
SECTION 2
18
17
16
• The mechanical parts with no reference
number in the exploded views are not
supplied.
18
19
13
15
10
12
8
housing (R) section
11
17
20
14
21
9
3
7
4
22
6
Ref. No. Part No. Description Remarks
1 1-833-292-11 CORD (WITH PLUG) (1.2m) (D777LP)
1 1-833-293-11 CORD (WITH PLUG) (0.6m) (D777SL)
2 X-2176-197-1 HOUSING (L) ASSY
3 2-688-739-01 BUSHING
4 2-893-836-01 RESISTER (A), HOUSING
5 1-542-703-11 DRIVER (040F021)
6 2-688-740-01 PACKING, HOUSING
7 2-685-612-01 PLATE (L), FRONT
8 3-253-143-01 SCREW (B2.6), (+) P TAPPING
9 2-688-749-01 RESISTOR
10 2-895-680-01 RESISTOR, PROTECTOR
11 2-688-748-01 SCREEN
2
5
2
23
1
Ref. No. Part No. Description Remarks
12 2-688-747-01 PAD, EAR
13 2-685-615-01 HANGER (R)
14 2-685-617-01 RETAINER, SLIDER
15 2-892-991-01 LID (R), HANGER
16 3-254-058-11 SCREW
17 2-898-709-01 PIN, PARALLEL (DIA. 2X16)
18 2-888-576-01 CAP, SLIDER
19 X-2176-196-1 SERVICE (HEADBAND ASSY)
20 2-685-616-01 LID (L), HANGER
21 2-685-614-01 HANGER (L)
22 2-892-294-01 SHEET, ADHESIVE
23 2-888-247-01 CAP, ORNAMENTAL
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