Sony ECMTS-125 Service manual
ECM-TS125
SECTION 1
GENERAL
This section is extracted
from instruction manual.
SERVICE MANUAL
Ver 1.0 1999. 05
SPECIFICATIONS
Type Electret condenser microphone
Dimensions Microphone parts:
11 × 26 mm (diameter/length)(7/16 × 11/16 in.)
Battery box parts:
40 × 16.5 × 46 mm (w/h/d)
(15/8 × 21/32 × 113/16 in.)
Mass Microphone parts (including cord):
Approx. 15 g (0.53 oz.)
Battery box parts
(including lithium battery and cord):
Approx. 17 g (0.6 oz.)
Cord Microphone parts:
∅2.2 mm (3/32 in.)OFC litz cord (2 core shielded)
Length: approx. 1 m (393/8 in.)
Battery box parts:
∅2.2 mm (3/32 in.)OFC litz cord (2 core shielded)
Length: approx. 0.3 m (117/8 in.)
Supplied accessories
Battery box (1)
Holder clip (1)
AEP Model
Frequently response
100 – 16,000 Hz
Directivity Unidirectional × 2
Output impedance
3 kΩ ±30%
Sensitivity Open circuit output voltage level -42 ±4dB
0 dB=1V/Pa, 1,000 Hz(1Pa=10µ bar=94 dBSPL)
Battery life Approx. 100 hours
(with Sony lithium battery CR2025(not supplied))
Maximum sound pressure input level
Approx. 110 dBSPL
1% wave distortion at 1,000 Hz
(0 dBSPL=2 × 10-5Pa)
Operating temperature range
0°C – 40°C (32°F – 104°F)
Design and specifications are subject to change without notice.
1 POWER switch
2 Battery check indicator
When you turn the power on, the battery check indicator lights up
momentarily. This is normal. The light tells you that the battery still
has life. When the battery becomes weak, the indicator lights
dimly or does not light at all.
3 L-shaped stereo miniplug (gold plated)
4 Battery box
You can clip the battery box to your tie, lapel or pocket.
5 Microphone jack
6 L-shaped stereo miniplug (gold plated)
7 Battery compartment
8 Microphone
9 Holder clip
A Interlock the projection of the holder to the groove on the
microphone.
B This microphone holder allows you to tilt the microphone 45°
backward or forward.
MICROFILM
1. Check the area of your repair for unsoldered or poorly-soldered
connections. Check the entire board surface for solder splashes
and bridges.
2. Check the interboard wiring to ensure that no wires are
"pinched" or contact high-wattage resistors.
ELECTRET CONDENSER MICROPHONE
3. Look for unauthorized replacement parts, particularly
transistors, that were installed during a previous repair. Point
them out to the customer and recommend their replacement.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer.
4. Look for parts which, through functioning, show obvious signs
of deterioration. Point them out to the customer and
recommend their replacement.
5. Check the B+ voltage to see it is at the values specified.
6. Flexible Circuit Board Repairing
• Keep the temperature of the 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.
— 2 —
ECM-TS125
SECTION 2
DIAGRAMS
2-1. SCHEMA TIC DIAGRAM
MIC UNIT
(L CH)
(R CH)
2
2-2. PRINTED WIRING BOARD
12
A
B
C
J1
MIC IN
D
34567
MIC UNIT
MIC2
(R CH)
AMP BOARD
UNIT BOARD
(SIDE A)
MIC1
(L CH)
D10
D20
LR
1-673-682-
MINI PLUG
(MIC OUT)
11
(11)
(SIDE A)
UNIT BOARD
(SIDE B)
1-673-682-
AMP BOARD
11
(11)
(SIDE B)
2.9
R11
C12
0.01
R21
C22
0.01
F
F
3.9K
3.9K
R12
2.2M
1.0
Q1
2SC4116YG
MIC AMP
R22
2.2M
1.0
Q2
2SC4116YG
MIC AMP
R13
R23
C14
1
3K
F
2.3
0.5
3K
R14
C24
1
3K
F
2.3
0.5
3K
R24
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
4
W or less unless otherwise
• % : indicates tolerance.
• C : panel designation.
• U : B+ Line.
• Power voltage is dc 3 V and fed with regulated dc power
supply from battery terminal.
L
R
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• V oltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production tolerances.
• Signal path.
F : MIC
TOTAL CURRENT
MIC UNIT
CONNECT : 700uA
DISCONNECT : 460uA
LITHIUM BATTERY
E
F
S1
POWER
ON
OFF
G
H
• Semiconductor
Location
Ref. No. Location
D1 F-2
D2 F-3
D3 D-2
D6 H-3
D7 G-3
D10 B-3
D20 B-4
Q1 E-3
Q2 D-3
R22
R14
Q2
R12
Q1
C14
C24
R24
D7
1-672-000-
MINI
PLUG
11
(11)
LITHIUM
BATTERY
CR-2025
3V
1-672-000-
11
(11)
R23
D3
R21
C22
R13
R11
C12
BATTERY
S1
16
CHECK
C1
LAMP
D1
R1
D2
R3
C2
D6
(MIC OUT)
Note on Printed Wiring Board:
• X : parts extracted from the component side.
®
•
: Through hole.
• b : Pattern of the rear side.
Caution:
Pattern face side: Parts on the pattern face side seen from
(Conductor B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component A) the parts face are indicated.
— 3 — — 4 —
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