Sony ecm 33 p service manual

Page 1

Type:
Battery:

Power supply:

ECM-33

E Model
USA Model

ELECTRET CONDENSER MICRUPHUNE

SPECIFICATIONS

E lectret Condenser Microphone

EVEREADY No. 206 dry battery,
No. E1 26 mercury battery or
equivalent
Normal operating voltage, 9 V DC
Minimum operating voltage, 7.5 V DC
Current drain; less than 0.5 mA
[with battery)
less than 5mA (with
external power supply)
Approx. 500 hours With
EVEREADY No. E-206
Approx. 1000 hours with
EVEREADY No.E126
Accepts external power supply of

Battery life;

Maximum sound
pressure input level:

24~54 V DC
Frequency response: 20~20000 Hz Dynamic range:
Output level. Capsule:
nun-nu 0' 1 Output an. own cm... FET:
I. w mud-nu- ouwui «i volt g. . .
mm I a, . 1,5,..2 Microphone cable.
o 250:: 7533 .1: iozmvx
.3 25011 .5. e 422 tooemv) Dimensions:
(Dewation iZdBl .
'1 OdBm=1mW/10u bar] 1000 Hz WGIQMI
'2 0dB=1Vlu bar, 1000Hz _ _
Directivity: Unidirectional 5:"°":°"ul 0:35"
Output impedance: 250 n :20% at 1000 Hz, balanced ° 5 ° 55-23::
Noise level: S/N ratio more than 46dB

Environmental condi-

(1000Hz,1u bar) lions fl proper ope-

Inherent noise less than 28dB SPL
IOdB =2x104 )1 bar)

Wind noise 'A, less than 45:18 SPL
(with wind screen)
less than 65 dB SPL
(without wind screen)

Induction noise of external magnetic

field '3 less than SdB SPL/m gauss

ration temperature:
Supplied accessories:

A Wind noise is the value measured
by applying a wind velocity of 6.6
lt/seoond from all directions to
the microphone.

The mean value is taken and
converted to the equivalent input
sound levelt

B The external magnetic field induc~
tion noise is measured with the
microphone placed in the alterna-
ting magnetic field of 50 Hz, 1m
gauss. The maximum noise value
is taken and then converted to the
equivalent input sound level.

Approx. 132 dB SPL (4020000 Hz)
Approx. 134dB SPL (100\20000 Hz)
Approx. 106GB

Electret condenser capsule

Sony conjuction FET

0,205" dia., 20 (6.1 m)
2-conductor cable with a CANNON
XLFI-3-11C plug

1.06" dia. x 6.94

(27 mm dia, x 177 mm)

6.5 01 (without cable and battery)
(1809)

-4F\140Fle7()(t 80 C)

37F~122"F (0)9500
Wind screen

Microphone holder (NS 5k")
carrying case

Microphone cable

SONE

SERVICE MANUAL

Page 2

1. DISASSEMBLY AND REPLACEMENT 1-B CAPSULE REPLACEMENT

rubber sheet

1-A. HANDLE GRIP REMOVAL

@ upper case assy

® 2503-23400

scre w

C4) grille
,
/ Band Master 6530

77
or equivalent

Note: When remove the handle grip, do no!
Iouch diaphragm of capsule,

1-C CIRCUIT BOARD REMOVAL

@ Remove the handle grip and capsule.

battery holder

@ Remove the handle grip as shown by arrow. ® Unsolder [our lead wiles at circuit board.