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SERVICE MANUAL
Ver 1.0 2000. 02
General
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Type
Electret condenser microphone
Output plug
L-shaped mini plug
Microphone cord
1.5 mm dia., single cord (shielded)(1.2 m[3.9 feet] long)
Approx. 66 × 66 × 26 mm (w × d × h)(2
Dimensions
Mass
Approx. 60 g (2.1 oz.)(including battery)
Performance
Frequency response 100 -12,000 Hz
Directivity
Omnidirectional
Output impedance
2.8 KΩ
Sensitivity
Open circuit output level *
ON : -44 dB ± 3.5 dB
nR-LOW : -38 dB ± 4 dB
nR-HIGH : -44 dB ± 4 dB
* 0 dB = 1V/Pa, 1,000 Hz
Power requirements one R6 (size AA) battery
Battery life : Approx. 20 hours with Sony R6P (SR) battery
Operating temperature range
0°C to 40 °C (32°F to 104°F)
Storage temperature range
-20°C to 60 °C (-4°F to 140°F)
Design and specifications are subject to change without notice.
w w w
.
MICROFILM
ECM-R300
AEP Model
SPECIFICATIONS
× 2
× 1
5
/
5
/
1
/
in.)
8
8
16
Approx. 70 hours with Sony alkaline LR6 (SG) battery
ELECTRET CONDENSER MICROPHONE
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a o
y
i
http://www.xiaoyu163.com
8
US Model
QQ :376315150
手机:13942296513
2007.04.30
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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.
Flexible Circuit Board Repairing
u 1 6 3
• Keep the temperature of soldering iron around 270˚C
during repairing.
.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
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SECTION 1
GENERAL
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1 Battery-check indicator
2 Power/nR (noise-reduction) switch
3 L-shaped mini plug
4 Microphone
5 Plug holder
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6 SENS (microphone sensitivity) selector
7 Spiral groove (for storing the microphone cord)
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This section is extracted
from instruction manual.
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Summary of Contents for Sony ECM-R300
- Page 1 : -44 dB ± 4 dB * 0 dB = 1V/Pa, 1,000 Hz Power requirements one R6 (size AA) battery Battery life : Approx. 20 hours with Sony R6P (SR) battery Approx. 70 hours with Sony alkaline LR6 (SG) battery Operating temperature range 0°C to 40 °C (32°F to 104°F)
- Page 2 ECM-R300 SECTION 2 DIAGRAMS 3 7 6 3 1 5 1 5 0 2-1. SCHEMATIC DIAGRAM AMPLIFIER BOARD 0.22 1SS352 S1-2 1SS352 MINI PLUG SENS MICROPHONE CAPSULE 300k HIGH S2-1 (C-1053) SSM2000 Q2-1 SENS 0.22 NOISE CANCELER NJM2132 HIGH 0.022...
- Page 3 http://www.xiaoyu163.com SECTION 3 EXPLODED VIEWS 3 7 6 3 1 5 1 5 0 NOTE: 2-2. PRINTED WIRING BOARD • -XX, -X mean standardized parts, so they may • The mechanical parts with no reference number have some differences from the original one. in the exploded views are not supplied.
- Page 4 ECM-R300 SECTION 4 AMPLIFIER ELECTRICAL PARTS LIST 3 7 6 3 1 5 1 5 0 NOTE: • Due to standardization, replacements in the • CAPACITORS: • SEMICONDUCTORS parts list may be different from the parts uF: µF In each case, u: µ, for example: specified in the diagrams or the components •...