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SERVICE MANUAL
WIRELESS MICROPHONE SYSTEM
AEP Model
SPECIFICATIONS
WCS-880
Ver 1.0 2001.04
Transmitter
(WCS-880T)
Receiver
(WCS-880R)
System
Carrier frequency
863.4 -- 864.6 MHz
Channel
Ch1, Ch2, Ch3
Modulation
FM
Frequency response
100 -- 15,000 Hz
Output level
­38 dB
±4 dB (0 dB = 1 V/pa, 1,000
Hz)
Output impedance
Approx. 1.5 kilohms
Transmitter
Oscillator
Crystal-Controlled
Antenna
Built-in antenna
Signal processing
Compressor
Maximum sound pressure level
More than 114 dBSPL
Operating voltage
1.5 V LR6 (Size AA)
× 1
Battery life
Approx. 20 hours
with Sony Alkaline battery
LR6 (N)
× 1
Mic input jack
3.5 mm dia. (Plug in power)
Dimensions
Approx. 60
× 70 × 22.5 mm (2 3/8 ×
2 7/8
× 29/32 inches) (W × H × D)
Mass
Approx. 69 g (2.4 oz) incl. battery
Receiver
Oscillator
SAW resonator
Antenna
Built-in antenna
Signal processing
Expander
Operating voltage
1.5 V LR6 (Size AA)
× 1
Battery life
Approx. 20 hours
with Sony Alkaline battery
LR6 (N)
× 1
Rec. output plug
Monaural mini plug
Monitor output level Approx. 2 mW at 16 ohms
Earphone jack
3.5 mm dia. monaural
Mixing mic. jack
3.5 mm dia. monaural
Cord length
Approx. 45 cm (17 3/4 inches)
Dimensions
Approx. 60
× 70 × 22.5 mm (2 3/8 ×
2 7/8
× 29/32 inches) (W × H × D)
Mass
Approx. 78 g (2.8 oz) incl. battery
Supplied accessories
Electret condenser lavalier microphone (1)
Directivity
Omni-directional
Cord length
Approx. 1.0 m (39 3/8 inches)
Dynamic earphone (1)
Cord length
Approx. 0.9 m (35 1/2 inches)
Ferrite core (1)
Design and specifications are subject to change without
notice.
Battery life
Sony alkaline battery LR6 (N) (not supplied) will give
20 hour continuous operation of the transmitter and
receiver units respectively.
9-873-047-11
Sony Corporation
2001D0500-1
Personal Audio Company
C
2001.4
Shinagawa Tec Service Manual Production Group


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2
WCS-880
TABLE OF CONTENTS
1.
GENERAL ............................................................ 3
2.
DISASSEMBLY
2-1. TX Board, VCO Board ...................................................
4
2-2. Antenna Setting ...............................................................
4
2-3. RX Board, FE Board .......................................................
5
2-4. Antenna Setting ...............................................................
5
3.
ELECTRICAL ADJUSTMENTS
TX Section ......................................................................
6
RX Section ......................................................................
8
4.
DIAGRAMS
4-1. Block Diagram ­ TX Section ­ ..................................... 10
4-2. Block Diagram ­ RX Section ­ ..................................... 11
4-3. Printed Wiring Boards ­ TX Section ­ .......................... 12
4-4. Schematic Diagram ­ TX Section ­ ............................... 13
4-5. Printed Wiring Boards ­ RX Section ­ ......................... 14
4-6. Schematic Diagram ­ RX Section ­ .............................. 15
5.
EXPLODED VIEWS
5-1. TX Section (WCS-880T) ................................................ 17
5-2. RX Section (WCS-880R) ................................................ 18
6.
ELECTRICAL PARTS LIST ............................... 19
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.


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3
WCS-880
SECTION 1
GENERAL
This section is extracted from
instruction manual.
1-a
Receiver unit / Récepteur / Empfänger / Ontvanger
To the microphone jack of your tape recorder
vers la prise microphone de votre magnétocassette
an die Mikrofonbuchse des Kassettenrecorders
Naar de microfoonaansluiting van uw cassetterecorder
Transmitter unit / Emetteur / Sender / Zender
2 MIC jack
Prise microphone (MIC)
Buchse MIC
MIC aansluiting
2
1-b
To the microphone jack of your
video camera recorder
vers la prise de microphone de
votre camescope
an die Mikrofonbuchse der
Videokamera
Naar de microfoonaansluiting
van uw camcorder
4 POWER switch
Interrupteur
d'alimentation (POWER)
Netzschalter POWER
POWER schakelaar
3 CHANNEL selector
Sélecteur de canal (CHANNEL)
Wählschalter CHANNEL
CHANNEL keuzeschakelaar
Approx. 45 m (150 feet)
Env. 45 m (150 pieds)
ca. 45 m
Ong. 45 m
2
4 POWER switch
Interrupteur
d'alimentation (POWER)
Netzschalter POWER
POWER schakelaar
1-a,b
3CHANNEL selector
Sélecteur de canal (CHANNEL)
Wählschalter CHANNEL
CHANNEL keuzeschakelaar
1-a
v (earphone) jack
Prise d'écouteur (
v)
Ohrhörerbuchse
v
v (oortelefoon) aansluiting
MIX MIC jack
Prise de mixage (MIX MIC)
Buchse MIX MIC
MIX MIC aansluiting
C
To the MIC jack
vers la prise MIC
an Buchse MIC
Naar de MIC aansluiting
Lavalier microphone (supplied)
Micro-cravate (fourni)
Ansteckmikrofon (mitgeliefert)
Lavalier-microfoon (meegeleverd)
To the
v (earphone) jack
Vers la prise
v (écouteur)
an die Buchse
v (Ohrhörer)
Naar
v (oortelefoon).
earphone (supplied)
écouteur (fourni)
Ohrhörer (mitgeliefert)
oortelefoon (meegeleverd)
To the
v (earphone) jack
Vers la prise
v (écouteur)
an die Buchse
v (Ohrhörer)
Naar
v (oortelefoon).
earphone (supplied)
écouteur (fourni)
Ohrhörer (mitgeliefert)
oortelefoon (meegeleverd)
Features
This wireless microphone system is designed to be
used with a video camera recorder, etc. By attaching
the receiver unit onto a video camera recorder, etc.
you can receive the sound picked up by the
transmitter unit. You can enjoy vivid sound which
matches the zoomed up images recorded by your
video camera recorder.
You can also use this system with a tape recorder as a
conventional wireless microphone system to record
the sound.
· The operational distance between the transmitter
unit and the receiver unit can be up to
approximately 45 m (150 feet). However, this
distance may become shorter if there are some
obstacles in between the transmitter unit and the
receiver unit.
· The radio frequency can be selected so that a less
busy channel can be used while the air is busy.
· Compact design featuring built-in antennas.
· The transmitter unit is equipped with a plug in
power
type MIC jack (monaural/ 3.5 mm dia.) An
optional microphone other than the supplied one can
be connected to this jack.
· The transmitter and receiver units are equipped with
clip type holders with the adjustable clips which can
be rotated 360 degrees so that the transmitter and
receiver units can be attached onto your clothes, etc.
· The receiver unit is equipped with the MIX MIC jack
to which an optional microphone such as the
ECM-T145 (lavalier microphone) can be connected,
so that the sound transmitted from the transmitter
unit can be mixed with the sound picked up by the
optional microphone.
· The receiver unit is equipped with the
v (earphone)
jack to which the supplied earphone can be
connected, so that you can monitor the sound being
recorded. You can use the earphone connected to the
receiver unit to monitor the subject using the
transmitter unit.
· The supplied lavalier microphone has a built-in
wind screen effect so that you can use the
microphone in the open air without a wind screen.
*
Plug in power system
The system that power is supplied directly to the
microphone from the microphone jack of the connected
equipment.


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4
WCS-880
SECTION 2
DISASSEMBLY
2-2.
ANTENNA SETTING
Note: Follow the disassembly procedure in the numerical order given.
2-1.
TX BOARD, VCO BOARD
1
two screws
(P2
× 6)
4
TX board, VCO board
5
case (upper)
2
two claws
3
case (lower)
TX board
case (upper)
antenna
case (upper) rear view
cushion (lower), switch
cushion (lower), switch


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5
WCS-880
2-3.
RX BOARD, FE BOARD
2-4.
ANTENNA SETTING
5
case (upper)
2
two claws
3
case (lower)
1
two screws (P2
× 6)
4
RX board, FE board
antenna
case (upper)
case (upper) rear view
RX board
cushion (lower), switch