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 —

SECTION 3

EXPLODED VIEW

NOTE:

• -XX, -X mean standardized parts, so they may
have some differences from the original one.

• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.

3-1. BATTERY BOX SECTION

• The mechanical parts with no reference number
in the exploded views are not supplied.

• Accessories and packing materials is given in
the last of this parts list.

5

4

2

3-2. MAIN SECTION

51

54

not supplied

54

53

52

6

53

7

8

9

10

1

11

#1

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks

1 1-790-506-21 CORD,MICROPHONE (2 CORE)
2 2-545-592-01 BUSHING
4 X-2542-165-1 CASE(UPPER) ASSY, BATTERY
5 2-545-588-01 KNOB,SWITCH (POWER)

* 6 A-4542-575-A AMP BOARD, COMPLETE

8 2-545-590-01 TERMINAL, MINUS
9 2-545-599-01 SHEET, BLIND
10 2-545-586-01 CASE(LOWER), BATTERY
11 2-545-587-01 HOLDER, BATTERY
12 2-545-668-01 LABEL, MODEL NUMBER

12

55

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks

51 A-4540-182-A CLIP ASSY, HOLDER
52 X-2542-079-1 CLIP ASSY
53 3-704-197-12 SCREW (M1.4 × 2.0), LOCKING

54 3-309-597-31 SCREW (1.4), TAPPING,PRECISION
55 A-4540-570-A MICROPHONE ASSY, LAVALIER (MIC UNIT)

7 2-545-589-01 TERMINAL, PLUS

— 5 —

#1 7-685-103-19 SCREW +P 2 × 5 TYPE2 NON-SLIT

— 6 —

SECTION 4

AMP

NOTE:

• Due to standardization, replacements in the
parts list may be different from the parts
specified in the diagrams or the components
used on the set.

• -XX, -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 service.
Some delay should be anticipated when
ordering these items.

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks

* A-4542-575-A AMP BOARD, COMPLETE

********************

< CAPACITOR >

ELECTRICAL PARTS LEST

• CAPACITORS:
uF: µF

• RESISTORS
All resistors are in ohms.
METAL: metal-film resistor
METAL OXIDE: Metal Oxide-film resistor
F: nonflammable

• COILS
uH: µH

1 1-790-506-21 CORD, MICROPHONE (2 CORE)

************************************************************

• SEMICONDUCTORS
In each case, u: µ, for example:
uA...: µA... , uPA... , µPA... ,
uPB... , µPB... , uPC... , µPC... ,
uPD..., µPD...

When indicating parts by reference number,
please include the board name.

MISCELLANEOUS

*************

ECM-TS125

C1 1-119-749-11 TANTAL. CHIP 33uF 20% 4V
C2 1-104-908-11 TANTAL. CHIP 47uF 20% 4V
C12 1-162-974-11 CERAMIC CHIP 0.01uF 50V
C14 1-164-346-11 CERAMIC CHIP 1uF 16V
C22 1-162-974-11 CERAMIC CHIP 0.01uF 50V

C24 1-164-346-11 CERAMIC CHIP 1uF 16V

< DIODE >

D1 8-719-072-95 DIODE 015AZ3.9-X-TPL3
D2 8-719-064-07 LEDSML-310LTT86 (BATTERY CHECK UNIT)
D3 8-719-056-29 DIODE 015AZ4.7-TPL3
D6 8-719-056-29 DIODE 015AZ4.7-TPL3
D7 8-719-056-29 DIODE 015AZ4.7-TPL3

< JACK >

J1 1-764-624-51 JACK(MIC IN)

< TRANSISTOR >

Q1 8-729-230-63 TRANSISTOR 2SC4116-YG
Q2 8-729-230-63 TRANSISTOR 2SC4116-YG

< RESISTOR >

R1 1-216-833-91 RES,CHIP 10K 5% 1/16W
R3 1-216-813-11 METAL CHIP 220 5% 1/16W
R11 1-218-706-11 METAL CHIP 3.9K 0.50% 1/16W
R12 1-216-861-11 METAL CHIP 2.2M 5% 1/16W
R13 1-218-703-11 METAL CHIP 3K 0.50% 1/16W

ACCESSORIES & PACKING MATERIALS

*******************************

3-866-282-11 MANUAL, INSTRUCTION (ENGLISH)
A-4540-182-A CLIP ASSY, HOLDER

R14 1-218-703-11 METAL CHIP 3K 0.50% 1/16W
R21 1-218-706-11 METAL CHIP 3.9K 0.50% 1/16W
R22 1-216-861-11 METAL CHIP 2.2M 5% 1/16W
R23 1-218-703-11 METAL CHIP 3K 0.50% 1/16W
R24 1-218-703-11 METAL CHIP 3K 0.50% 1/16W

< SWITCH >

S1 1-692-397-21 SWITCH, SLIDE (POWER)

************************************************************

— 7 — — 8 —

9-926-940-11

Sony Corporation

Personal Audio Company

Printed in Japan ©1999.5

99E1639-1

Published by General Engineering Dept.