Sony ECM-957PRO Bedienungsanleitung

SERVICE MANUAL

Published by Sony Techno Create Corporation

Sony Corporation

Audio Business Group

SPECIFICATIONS

ELECTRET CONDENSER

STEREO MICROPHONE

9-887-969-01

2008A04-1

US Model

Canadian Model

Ver. 1.0 2008.01

ECM-957PRO

General

Type One-point stereo (employing the Mid-side stereo

system), electret condenser microphone

Microphone cord 4mm diameter, two core-shielded OFC (Oxygen-free

copper) cord with Canon XLR-5-12C type connector

and gold plated L-shaped stereo miniplug

Stand screw PF 1/2 screw

Dimensions Approx. 40 × 183mm (diameter ×length) (15/8 ×71/4

in.), projecting parts and controls not included.

Mass Approx. 330 g (11.7 oz.) including battery and cord

Supplied accessories Wind screen (1)

Microphone holder (PF 1/2 screw) (1)

Microphone stand (1)

Carrying case (1)

Performance

Frequency respone 50 – 18,000 Hz

Directivity Unidirectional × 2 (Directive angel: 90° or 120°)

(switchable)

Output impedance 600 ohm ± 30% unbalanced

Sensitivity (directive angle 120°)

Open circuit output voltage ∗1: –37 ± 3 dB

Effective output level ∗2: –40.8 ± 3 dBm

Difference between Land R channel sensitivity: Less

than 3 dB

Power requirements Normal operating voltage: 1.5 V , R6 (Size AA)

battery

Minimum operating voltage: 1.1V , R6 (SizeAA)

battery

Battery life: Approx. 200 hours with Sony R6P (SR)

battery

Maximum sound pressure level input ∗3

More than 120 dBSPL

Dynamic range More than 95 dB

Operating temperature range

0°C – 40°C (32°F – 104°F)

∗1 0 dB = 1 v / Pa, 1,000 Hz (1 Pa = 10 μbar = 94 dBSPL)

∗2 0 dBm = 1 mW / Pa, 1,000 Hz

∗3 1% wave distortion at 1,000 Hz. (0 dBSPL = 2 × 103Pa)

Design and speciﬁcations are subject to change without notice.

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

FEATURES

This microphone is suitable for use in a variety of situations such as at

concerts or conferences with digital recording equipment (Sony DAT, MD,

NT (Digital Microcorder) ICD, etc.).

• The turning capsule function allows both vertical and horizontal

sound pick-up.

• The Mid-Side Stereo System provides a natural sound pick up,

delivering a stereo sound image with superb clarity.

• The directive angle (between left and right channels) can be set

to 90° or 120° according to the sound source.

ECM-957PRO

SECTION 1

GENERAL This section is extracted

from instruction manual.

ECM-957PRO

SECTION 2

DISASSEMBLY

• This set can be disassembled in the order shown below.

2-1. GRIPASSY

(Page 3)

2-2. GRILL ASSY

(Page 4)

SET

2-3. CHASSIS

(Page 4)

2-4. AMP BOARD

(Page 5)

Note: Follow the disassembly procedure in the numerical order shown below.

2-1. GRIP ASSY

grip assy





ECM-957PRO

2-2. GRILL ASSY

2-3. CHASSIS

joint (2) screw

joint (2) screw

grill assy

screw

(+B 1.4 × 6)

screw

(+B 1.4 × 6)

rotary knob

rotary knob

two screws

(+K 2 × 4)

two screws

(+K 2 × 4)

chassis

ECM-957PRO

2-4. AMP BOARD

two screws

(+K 2 × 4)

ground plate

AMP board

Remove the twenty five solders.

black

black blue

blue

brown

white

black

white

white white

red

green

red

red red

red

yellow

ECM-957PRO

MEMO

ECM-957PRO

SECTION 3

DIAGRAMS

3-1. PRINTED WIRING BOARD • : Uses unleaded solder.

23456789

BLK

WHT

RED

BLK

YEL

RED

R11

R10

MIC2

(SIDE) MIC1

(MID)

BATTERY

CHECK

POWER

/DIRECTIVE

ANGLE

(POWER/DERECTIVEANGLE)

ECB

-1

-2

IC1

RED

BRN

WHT

BLK

BLU

RED

CN1

DRY BATTERY

SIZE"AA"

(IEC DESIGNATION R6)

1PC,1.5V

BLK

321

120˚90˚OFF

OUTPUT

TRANSFORMER

OUTPUT

TRANSFORMER

RED

GGSSDD

(CHASSIS)

GRN

YEL

BLK

BLU

WHT

BLU

RED

GRN

YEL

BLK

BLU

WHT

BRN

BLK

(CHASSIS)

1-876-391-

(11)

1-876-391- (11)

AMP BOARD (SIDE A) AMP

BOARD

(SIDE B)

SIDEASSY ROTARY FRAME ASSY

For Printed Wiring Boards.

Note:

• X: Parts extracted from the component side.

• Y: parts extracted from the conductor side.

• z: Through hole.

• : Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

• Indication of transistor.

Caution:

Pattern face side:

(SIDE B)

Parts face side:

(SIDE A)

Parts on the pattern face side seen from

the pattern face are indicated.

Parts on the parts face side seen from

the parts face are indicated.

BThese are omitted.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead-

free mark (LF) indicating the solder contains no lead.

(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher

than ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be

applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set to

about 350 °C.

Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to ﬂow)

than ordinary solder so use caution not to let solder bridges

occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may

also be added to ordinary solder.

Ref. No. Location

• Semiconductor

Location

D1 G-7

D2 E-7

IC1 H-7

Q1 A-7

Q2 A-6

Q3 E-7

Q4 D-7

ECM-957PRO

3-2. SCHEMATIC DIAGRAM

R1 R4

S1-1

C6 C7

R11

R10

IC1

S1-2

CN1

MIC1

MIC2

For Schematic Diagrams.

Note:

• All capacitors are in μF unless otherwise noted. (p: pF)

50 WV or less are not indicated except for electrolytics

and tantalums.

• All resistors are in Ωand 1/4W or less unless otherwise

speciﬁed.

• A : B+ Line.

• Power voltage is dc 1.5 V and fed with regulated dc power

supply from battery terminal.

• Voltages is dc with respect to ground under no-signal (de-

tuned) conditions.

no mark : S1: 90°

*: Impossible to measure

• Voltages are taken with a VOM (Input impedance 10 MΩ).

Voltage variations may be noted due to normal production

tolerances.

Note:

The components identi-

ﬁed by mark 0or dotted

line with mark 0are criti-

cal for safety.

Replace only with part

number speciﬁed.

Note:

Les composants identiﬁés

par une marque 0sont

critiques pour la sécurité.

Ne les remplacer que par

une piéce portant le nu-

méro spéciﬁé.

ECM-957PRO

SECTION 4

EXPLODED VIEWS

1 X-2190-130-1 GRIPASSY

2 3-255-763-01 SCREW, JOINT (2)

3 3-316-938-41 SCREW (B1.4X6), TAPPING

4 2-545-112-11 KNOB, ROTARY

5 X-2189-239-1 GRILLEASSY

6 2-545-111-11 KNOB, SWITCH

7 2-545-109-03 CHASSIS

#1 7-627-452-28 SCREW, PRECISION +K 2X4

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

Note:

• -XX and -X mean standardized parts, so

they may have some difference from the

original one.

• Items marked “*” are not stocked since

they are seldom required for routine ser-

vice.

Some delay should be anticipated when

ordering these items.

• The mechanical parts with no reference

number in the exploded views are not sup-

plied.

• Color Indication of Appearance Parts Ex-

ample:

KNOB, BALANCE (WHITE) . . . (RED)

Parts Color Cabinet’s Color

• Accessories are given in the last of the

electrical parts list.

4-1. GRILL SECTION

The components identiﬁed by mark 0

or dotted line with mark 0are critical for

safety.

Replace only with part number speciﬁed.

Les composants identiﬁés par une marque

0sont critiques pour la sécurité.

Ne les remplacer que par une pièce portant

le numéro spéciﬁé.

frame section

ECM-957PRO

*51 2-545-122-01 FRAME

52 2-545-110-01 TERMINAL, PLUS

53 2-545-126-01 TERMINAL, MINUS

54 3-701-441-21 WASHER

*55 2-532-219-00 TERMINAL, GROUND

56 2-545-114-01 WASHER, RUBBER

*57 2-545-113-01 FRAME, ROTARY

58 2-545-116-01 PLATE, GROUND

59 3-669-480-61 + PTPWH 2

60 A-1510-490-A AMP BOARD, COMPLETE

61 3-257-114-21 SCREW

62 2-513-925-11 CASE, CONNECTOR

63 1-543-298-11 BEAD, FERRITE

64 A-1510-492-A FRAME ASSY, ROTARY

(including MIC1 and Q2)

65 A-1510-495-A SIDE ASSY (including MIC2 and Q1)

66 3-701-443-11 WASHER

CN1 1-560-490-12 PIN, CONNECTOR 5P

T1 X-2190-129-1 TRANSFORMERASSY

T2 X-2190-129-1 TRANSFORMERASSY

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

4-2. FRAME SECTION

CN1

not supplied

not supplied not supplied

not supplied

(MIC1)

not supplied

(MIC2)

not supplied

(Q2)

not supplied

(Q1)

61 62

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