Sony mdr 7504 service manual

Page 1

SERVICE MANUAL

US Mode/
AEP Model

SPECIFICATIONS

Type Supra-aural, closed
Driver units 30 mm dia.. dynamic type
Impedance 45 ohms at 1 kHz
Sensitivity 1023 dBImW
Rated power 0.10 W
Power handling capacity

0 50 W
Frequency response 10 , 25,000 Hz
Cord 3 m (extended length) coiled cord with a

stereo unimatch plug
Weight Approx. 165 9 (without cord)

1. DISASSEMBLY
I DRIVER REMOVAL I
0 Follow the disassembly procedure in the numerical order given.

Remove 3 pawls as illustrated .

g@h\4

blade screwdriver

MICROFILM

copper

rad mark

red mark
% driver (LI 0
\479/

driver (I?)

GHN

copper

STEREfl HEADPHflNES
ONY;

Page 2

EXPLODED VIEW AND PARTS LIST

NOTE: ,

0 Items marked * are not stocked Since
they are seldom required for routine
service. Some delay should be antici-

pated when ordering these items.

0 The mechanical parts with no reference
number in the exploded Views are not
supplied.

0 Due to standardization, parts with part
number suffix -XX and -X may be
different from the parts specified in
the components used on the set.

Ref. No. Part No. Description Remark ELECTRICAL PARTS
l x-2113-123-1 PAD ASSY, EAR Ref.No. Part No. Description Remark
2 2-113-173-01 STOPPER, DRIVER - 7
3 2-113-171-01 PIPE,TURBO 27 1-505-068-11 DRIVER (030E015)
A 2-113-182-01 PLATE, FRONT 23 1-580-792-11 CORD (VITH PLUG)
s 2-113-137-01 BUSHING -
s 7-685-102-19 SCREW +P 2 x4 TYPEZ SLIT
; $333315} mggagggssv 2335335313Eiti'lilfiilfttfliiififi
9 2-113-134-11 CASE, HINGE
Io 2-113-123-11 LID, HINGE CASE 2-113-13901 CASEv SOFT
* 27120-918-11 SLEEVE. SIVER
ll 2-113-167-01 LID (LEFT). HANGER I 4-942-602-01 CASE, ORNAMENTAL
Iz x-2113-101-1 SLIDER (LEFT) ASSV I 4-942-603401 INDIVIDUAL CARTON
13 2-113-146-01 SPRIMG, COMPRESSION x X-4941<244-1 CUSHION ASSY
IA 7-671-113-01 STEAL, BALL 3
15 x-ZIis-IIG-I CLICK CASE (L) ASSY
t 16 z-IIa-IZA-OI LID (LEET), CLICK CASE
t 17 2-113-168-01 BAND, HEAD
18 x-2113-119-I HEAD CUSHION ASSY
19 x-2113-Iis-I CLICK CASE (R) ASSY
20 x-2113-Ioz-I SLIDER (RIGHT) ASSY
x 21 2-113-125-11 LID (RIGHT), CLICK CASE
22 2-113-173-01 HANGER (RIGHT)
23 2-113-175-01 LID (RIGHT). HANGER
24 7-685-239-19 SCREW +KTP 2.6 x5 TYPEZ NON-SLIT
25 X-494l-332-l HOUSING (R) ASSY
26 7-685-235-19 SCREV +KTP 2.6 x10 TYPEZ SLIT
Sony Corporation . 97002464
9-956-094-12 Personal A&V Products Company PM '" Japan ©1997"

_.2_

Published by Quality Englnuring Dept.
(Shlbeurl)