Chiayo IWM-202 User manual

IWA-300/IWA-320
CHIAYO ELECTRONICS CO., LTD.
Infrared Wall-mount Amplifer
OPERATING MANUAL
CHIAYO ELECTRONICS CO., LTD.
Web site: http://www.chiayo.com.tw E-mail: [email protected]
OFFICE: 30, LANE 27, SEC.4. JEN-AL ROAD, TAIPEI, TAIWAN / TEL: [phone] FAX: [phone]
FACTORY: 88, CHUNG HSIAO STREET 2, CHIAYI, TAIWAN. / TEL: [phone] FAX: [phone]
Printed in Taiwan, Nov 2004 12I424
IWH-201/IWM-202/IWM-302

Thank you very much for the purchase of this Infrared Wall-mount Amplifier. In
order to have a trouble-free operation, please read this operating manual
thoroughly to understand all its parts and functions.
Configuration
PA-200
HC-10
1.2V / 2100 mAH * 2
IWM-202
HC-20
2.4V / 2100 mAH * 1
IWH-201
IS-20
2.08 MHz, 2.54 Mhz
Dual
Single
IWA-320IWA-300
Model
No. of IR channel
IR frequency
External Sensor
Handheld microphone
Battery for handheld
Charger for handheld
Bodypack transmitter
Battery for bodypack
Charger for bodypack
Matching speaker
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Limitations of Infrared Wireless Microphone System
1.IR is for indoor use only. Never try to use an IR system in outdoor.
2.IR is for small room use only. Never try to use an IR system in a big hall with
high ceiling.
3.IR is not suitable for a brightly lit area or an area with large or many windows.
4.The medium of carrier is infra-red ray. Line-of-sight is best. Never cover up the
radiator or receiving sensor. Transmitter should stay as close as possible to the
receiving sensor.
5.IR transmitter consume higher current.
How to achieve best result with IR system ?
1.Install receiving sensor in various position in the room to achieve best receiving
at different position.
2.Install the extension sensor at half of the classroom height to achieve maximum
receiving angle.
3.Line-of-sight is best. Transmitter should stay as close as possible to the receiving
sensor.
4.Dim the light of the room and close the curtain if the room is brightly lit.
Simple DIY diagnosis
1.No sound
1.1 Check power supply
Please check the power supply of the receiver / amplifier and whether Battery
has been correctly inserted into the transmitter.
1.2 Check IR frequency
Please check the frequency label of the transmitter. Both transmitter and receiver
must have a matching IR frequency. When the transmitter with the correct IR
frequency is switch on, IR indicator will be lighted up at the receiver end.
1.3 Check speaker connection.
If the above are ok., please check the speaker connection to the amplifier.
2. Operating range is short
2.1 Position of the receiving sensor
Please place the receiver / amplifier with the built-in sensor at least 1.5m above
the ground and make sure that the sensor is not been blocked.
2.2 Additional receiving sensors.
If the built-in sensor does not provide enough coverage, please add two more
extension receiving sensors ( IS-20 ) to the receiver / amplifier. Remember to place
the two sensors at left and right or rear end of the classroom and at half-height
position of the room to get the max. receiving angle.
2.3 Add curtain to glass windows.
If the room has many glass windows and is brightly lit, please cover it with dark
colored curtain.
2.4 Change transmission power of the IR emitter
Put the power selector switch of the transmitter to HI ( High ) for higher
Transmission power.
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Front view, Side view, Rear and Bottom view.
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A A
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Operating procedures
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1 MIC 1 IN
2 MIC 2 IN
AUX IN 1
AUX IN 2
AUX IN 3
AUX OUT
MIC 1 VOL
IR 1 VOL
MIC 2 VOL
10 IR 2 VOL
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AUX IN VOL
TONE
POWER SWITCH
CHARGER
SPEAKERS OUT
REMOTE SENSORS
POWER IN
LOCK
SENSOR
IR INDICATOR
1/2
1/2
1/2
1/2
1/4
3/4
1/4
3/4
A
B
B
c
c
12m
12m
3m
A.IWA-300
B.Speaker
C.IS-20
Plug the AC plug of the IWA-300 into the AC socket. Open the cover of the
amplifier, take out the transmitter and install battery into it. Switch on the amplifier
main switch ( 13 ). Switch on the IR 1 transmitter, the IR1 indicator LED will be
lighted up. Speak to the microphone and adjust the IR1 volume control ( 8 ),
amplified sound could be heard over the speakers. For IWA-320 model, which has
two IR receiver modules installed, the IR2 LED will be lighted up when IR2
transmitter is switched on. Speak to the microphone 2 and adjust IR2 volume
control ( 10 ), mixed amplified sound could be heard over the speaker.
IWA-300 system also has two cable mic inputs and their respective volume
controls. In a full system like the IWA-320, 4 persons can speak together. Two
persons use the two cable mics and two use the IR transmitters.
For multimedia application, the audio output of the computer could be fed into one
of the three AUX IN. The AUX Vol control adjust the all the 3 mixed AUX IN signals
Correct way of holding or wearing the transmitter is of utmost importance. Do NOT
hold the handheld such that IR emitter is blocked or covered as this will result in no
transmission.
For the bodypack transmitter, do NOT put the transmitter in the pocket or wear it
inside a jacket as this will result in no transmission.
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Do not wear it
underneath a jacket
or inside the pocket.
Do not cover the
IR emitter.
IR emitter
should not be
blocked.
Connection diagram
A.Basic System B.Extended System(multimedia version)
Inserting battery in handheld microphone
Power selector position LO position HI position
Operating range
Battery life ( NiMH )
About 20 m About 30 m
About 6 hours About 4 hours
Handheld Microphone IWH-201
1.Grille cover.
2.Status LED: Bicolor LED will glow when switch is put to ON :
Green : Battery is full and transmitter is in normal mode.
Red : Battery is weak and will shut off soon. Please charge the battery.
3.Power switch
Slide to turn microphone on or off.
4.Battery compartment.
5.Infrared emitter with charging contacts.
IR ray radiates from here. Do not block or hold this part of the body.
6. ( HI / LO ) .Power Selector Switch. Factory preset is LO.
456
To insert new or take out old battery, simply turn the battery compartment cover in
counterclockwise direction and pull it open as illustrated.
Make sure that the power switch is in OFF position when taking out or installing
new battery. Insert the supplied battery into the battery compartment, aligning the
battery with the correct polarity symbol. If battery is inserted wrongly, the
transmitter will not be powered.
For multimedia application, the audio out
of the laptop computer output is fed into
the Line In of the IWA-300 and the
teacher or presenter can use the IR
transmitter for sound enforcement.
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Wall
Nail
Hole
14cm
Hole
This is an InfraRed wall-mount amplifier system. It is designed for Indoor fixed
installation use only. To install it on the wall, please select a place near the AC
outlet. Two nails should be hammered horizontally at 14cm apart on the wall and
hang the wall mount amplifier about 1 1/2 m above ground. Install two 8 Ω
speaker in the middle left / right or the rear end of the classroom at a height of
about 2 1/2 m from the ground and connect the speaker wires to the speaker out of
the amplifier. IWA-300 is equipped with one internal receiving sensor. If the
coverage of the built-in sensor is inadequate, this amplifier allows the installation
of two additional extension sensors ( please use IS-20 ) for extended coverage.
The external sensor should be installed at half height of the classroom at the left /
right or rear end of the classroom. DO NOT install the sensor at the ceiling or just
below the ceiling. At half height, the sensor has the best receiving angle.
Installation of IWA-300
Custom made rechargeable Ni-MH bettery
NiMH battery
1.This battery is exclusively designed for use with the Chiayo infrared handheld
microphone. The rating is 2.4V / 2100 mAH.
2.Please fully charge the supplied NiMH battery before use.
3.Even though NiMH battery does not have memory effect, it is still advisable to
fully discharge the battery before the next charging. Repeated charging without
full discharge may somehow shorten the lifespan of the rechargeable battery.
4.Battery lifespan is about 1 year or 500-time charging cycle under normal
operating condition. When operating hour keeps decreasing even after every
full charge, it indicates that the battery has been exhausted and a replacement
is necessary.
5.Be sure to use the Chiayo specified rechargeable battery as others may not
Work well with the drop-in charger.
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IWM-202
Desktop battery charger HC-10
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1.Power on / off switch.
2.Threaded 3.5mm mini-jack for secure
connection of lavalier or headset
microphone.
3.Charging input Via cable to charger HC-10.
4.Bi-color Power ON / Low battery LED
changes color to indicate low batteries.
5. Input audio level control serves as remote
volume control.
6. Multiple emitter array of high efficiency
Infrared LEDs for optimum IR
transmission.
7. Belt clip.
8. HI / LO power switch.
9. Battery compartment cover.
The battery compartment is at the rear side of
the transmitter. To open / close the
compartment, just slide it down / up as shown.
When inserting new battery, please align it
according to the correct polarity as marked.
Battery used are 2 pieces of NiMH 1.2V /
2100 mAH type.
Operation:
1.Connect the AC plug of the adaptor to the wall
socket and DC plug to the DC IN of the
charger.
2.Insert the battery to be charged according to
its correct polarity.
3.When charging start, LED will turn RED.
4.Press charge / discharge button to discharge
battery. LED will turn YELLOW while
discharging and press again will return it to
charging (Red).
5.When battery is fully charged , indicator will
turn GREEN and buzzer will sound .
6.Plug out of HC-10 to charge in ( 3 ) of
bodypack IWM-202 via a charging cable.
Charging the batteries of IWM-302:
When IWM-302 is turned on, the LED glows Green to indicate enough power. If
red or not lighting up, the batteries are weak or wrongly installed. Please check to
see if the batteries are installed according correct polarity.
IWM-302 can be recharged by HC37.To charge IWM-302, first turn it off , connect
the Adapter to a wall outlet and then plug the joint to DC-in socket of HC37. Thus
use can place IWM302 to HC37. During the charging process, the Red LED will
keep flashing until the Green LED lights up to indicate batteries are already full.
Note: If you want to discharge the residual electricity of the batteries, you can
press "COND" button and its designated Yellow LED will light up. Till the batteries
have been completely discharged, the Yellow LED will be off and Red LED will
light up to begin charging the batteries.
Be sure to use specified battery only. You can not charge other types of battery.
Do not use any battery and charger other than specified.
E DG F
D. COND
E. Charging indicator
F. Bat.full indicator
G. A daptor
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BODYPACK TRANSMITTER IWM-302
Making changes to settings in IWM-302
Making changes to CH:
First open the cover of IWM-302's battery compartment by pressing its
release buttons on both sides. There are 2 channels for selection, namely
"A" and "B".Either can be chosen by switching this selector(B).
Making changes to MT:
Low-impedance "MT" gain control is situated inside the battery
compartment. It can be adjusted by using a small screw driver to rotate till
a desired audio output level has been selected.
Installing batteries to IWM-302
To install the batteries, first open the battery compartment by pressing the release
buttons on both sides of the IWM-302. Batteries used are 2 pcs of NiMH
1.2V/2100 mAH type(rechargeable) or Alkaline type(not rechargeable). When
inserting batteries, please place them according to the correct polarity..
1. Volume control
2.Bi-color Power on / Batter-
status indicator:
3.Power switch
4.5-pin mini XLR connnector
5.Lavalier microphone
6.Mic clip
7.Infrared emitter
8.Cover-release button
9.Charging contacts
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A
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B
C
Transmission-strength selector
MT
Channel s elector
Handheld Microphone
Drop-in Charger HC-20
1.Connect the AC adapter to a wall outlet and beware of your local AC rating.
2.Drop in the handheld microphone with the drained-out original battery into the
charger. Charging process will start automatically.
3.During charging, LED will turn RED. Charging process will take approx.
3.5hours.
4.When charging is completed, LED indicator will turn GREEN.
5.Please use the Chiayo specified rechargeable battery only. When other type
of battery is installed, there is no guarantee that charging will work.
NOTE:
It is imperative to use only Chiayo specified rechargeable battery as other
rechargeable battery may not able to work with the charger.
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