Sony ECM-957PRO Service Manual
SERVICE MANUAL
Published by Sony Techno Create Corporation
Sony Corporation
Audio Business Group
SPECIFICATIONS
ELECTRET CONDENSER
STEREO MICROPHONE
9-887-969-01
2008A04-1
©
2008.01
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 × 7 1/4
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 L and 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 (Size AA)
battery
Battery life: Approx. 200 hours with Sony R6P (SR)
battery
Maximum sound pressure level input
∗
3
More than 120 dB
SPL
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 × 103 Pa)
Design and specifi cations 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 damaged 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
2
SECTION 1
GENERAL
This section is extracted
from instruction manual.
ECM-957PRO
3
SECTION 2
DISASSEMBLY
• This set can be disassembled in the order shown below.
2-1. GRIP ASSY
(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
4
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
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