Sony mdr 84 service manual

Page 1

SPECIFICATIONS
Type: Dynamic open-air type
Driver units: 30mm dia.. dome type CCAW (MOE-84)
40mm dia.. dome type CCAW (Milli-94)
Impedance: 24 ohms at 1 kHz (DR-84)
63 ohms at 1 kHz (MDR-94)
Sensitivity: 107 dB/mW (MDR-84)
108 dB/nw (MM-94)
Rated power: 40 mW
Power handling capacity:
100 mW
Frequency response:

10-24. 000 Hz (HDR84)
5-25, 000 Hz (Mini-94)

Cord: Approx. 2n long OFC litz cord with a
gold-plated stereo uninatch plug (MW-84)
Approx. 3m long LC-OFC [its cord with a
gold-plated stereo unimatch plug (MDR94)

Weight: Approx. 100 g(without cord) (MW-84)

Approx. 110 2(withoui cord) (MDR-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

2. WIRING DIAGRAM

coppegtfi: WWW
red red

91> (22>,

W .

\ / driver (L) driver (R)

copper red ma rk

A

red mark

STEREfl HEADPHflNES
SONSI.

Page 2

iMDR-84/ 94

3. EXPLODED VIEW AND PARTS LIST.

NOTE:

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

0 The construction parts of an assembled
pan are indicated wilh a collation num-
bar in the remark column.

not
supplied
901
902
not
supplied 2/ Y
Rel.No Part No Descrigtion Remarks Pef.No Part No. Description Remarks
1 X-4941-184-1 (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-Ed).l..PLAT, FRONT
3 4-941-887-11 (MDR-MLHHANGER (L) 13 4-941-836-01 (MDR-Sd) ICUSHION
3 4-541-887-01 (MDFJ-M).l.,HANGER (L) 13 4-941-837-01 (MDR-84)l...CUSH|0N
4 7-626-305-31 SPRING, PIN 1X8 14 4-941-838-01 PAD, EAR
5 4-941-874-01 LID (L), HANGER 15 X-494l-186-l (MDR-94)....HOUSING (R) ASSY
6 4-541-373-01 LID (R), HANGER 15 x-4941-188-1 (Mon-M). .HOUSING (R) Assv
7 4-941-888-11 (MDR-M)l,..HANGER (R) 901 1-575-826-21 (MDR-94). .CORD (WITH PLUG)
7 4-941-888-01 (MDR-MLHHANGER (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)A...DRIVER (SPEAKER)
9 4-942-127-01 REGISTER SP1 1-505-116-11 (MDR-84). .DRIVER (SPEAKER)
10 x-4941-185-1 (MDR-sa)....HousING (L) AssY SP2 1-505-118-11 (MDR-94)I .DRIVER (SPEAKER)
10 x-4941-187-1 (MDR-84)...IH0USING (L) ASSY SP2 1-505-116-11 (MDR-M)....DRIVER (SPEAKER)
English
- 90I0485-1
Sony Corporation main Japan
9-956-047-11 General Audio Group © 1990. 9

_2_ Published by Cuslomar Relations and Service Group