Sony mdr 94 service manual

Page 1

SERMAVIBENIIAL

Type: Dynamic openrair type
Driver units: 30mm diam done type CCAW (AIM-84)
40min dia.. dome type CCAW (IIDIHM)
Impedance: 24 ohms at 1 kHz (DR-84)
63 ohms at 1 kHz (Mm-94)
Sensitivity: 107 dB/IAW (MDR-84)
108 dli/mW (MM-94)
Rated power: 40 mW
Power handling capacity:
100 ian
Freouency response:
10-24. 000 Hz (link-84)
5-25.000 Hz (MM-94)
Cord: Approx. 2n long OFC litz cord with a
gold-plated stereo unimatch plug (MDR-84)
Approx. 8m long LC-OFC lits cord with a
gold-plated stereo unimatch plug (MDRQA)
Weight: Approx. 100 g(without cord) (MDRSAI)
Approx. 110 g(without cord) (MW-94)

Design and specifications subject to change without notice.

1. DISASSEMBLY
[DRIVER REMOVAL]
Remove 3 latches as illustrated.

[HANGER REMOVAL]
1. Pull out the spring-pin with long nose pliers.

precisio n
screwdriver

housing

US Model
Canadian Model
UK Model

E Model

MDR-84

AEP Model

MDR-84/94

PHOTO : MDR-84

WIRING DIAGRAM

copmrfi Wm)
red

fl

red
\ / driver(L) driver(R)

copper red ma rk

/
Ml,
STEREII HEADPHIINES
SONE

Page 2

MDR-84/ 94

3. EXPLODED VIEW AND PARTS LIST.

NOTE:

I The mechanical parts with no reference
number in the Exploded views are not

supplied.

0 The construction parts of an assembled
part are indicated with a collation num-
ber in the remark column.

901
902
not
supplied
Rel.No Part No Descrigtion Rsmams Pef.No Part No. Description
1 X-494l-184-1(MDR-94 HEAD BAND ASSY 11 4-941-875-01 BUSHING
1 X-4941-189-1 (MDR-84 ..HEAD BAND AssY 12 4-941-868-01 (MDR-94)....PLAT, FRONT
2 7-685-102-19 SCREW P2X4TYPE2 NON-SLIT 12 4-941-891-01 (MDR-EA).I..PLAT, FRONT
3 4-941-887-11 (MDR-MLHHANGER (L) 13 4-941-836-01 (MDR-94) ICUSHION
3 4-941-887-01 (MDR:-84)...,HANGER (L) 13 4-941-837-01 (MDR-84)t...CUSH|0N
4 7-626-305-31 SPRING, PlN 1X8 14 4-941-838-01 PAD, EAR
5 4-941-874-01 LID (L). HANGER 15 X-494l-186-I (MGR-94)..HOUSING (R) ASSY
6 4-941-873-01 LID (R), HANGER 15 x-4941-188-1 (MDR-M). .HOUSING (R) Assv
7 4-941-888-11 (Molt-94)..HANGER (R) 901 1-575-826-21 (Mm-94). .CORD (WITH PLUG)
7 4-941-888-01 (MDR-84).H.HANGER (R) 901 1-575-827-11 (MDR-84),...CORD (WITH PLUG)
8 4-941-877-11 (MDR-94)M.CAP, GRILLE 902 1-506-539-11 PLUG. ADAPTOR
8 4-941-877-01 (MDR-M)..,.CAP, GRILLE SP1 1-505-118-11 (MDR-94)t...DRIVER (SPEAKER)
9 4-942-127-01 REGISTER SP1 1-505-116-11 (MDR-sd). .DRlVER (SPEAKER)
10 X-4941-185-1 (MDR-M)....HousING (L) AssY SP2 1-505-118-11 (MDR-94)t .DRIVER (SPEAKER)
10 X-4941-187-1 (Mon-34)..Housm6 (L) ASSY SP2 1-505-116-11 (MDR-M)....DRIVER (SPEAKER)
Sony Corporation
9-956-047-11 General Audio Group

_2_

English
90|04851
Printed in Japan
© 1990. 9

Published by Customer Relations and Servlce Group