Okayo EJ-501IR User manual

[User's Guide]
EJ-501IR Single-Volume Control Receiver
EJ-502IR Dual-Volume Control Receiver
Infrared Wireless Microphone System

Troubleshooting / Caution ...........................................................................................
10
3
Infrared receiver illustration .........................................................................................
4 ~ 5
Infrared handheld microphone illustration ..............................................................
Maintenance guidelines ...............................................................................................
9
6 ~ 7
External sensor illustration .....................................................................................
1
Specification .........................................................................................................
11 ~12
PREFACE
Please read through the manual carefully before your operation to ensure best performance
and quality of the application.
CONTENT
2
EJ-502IR infrared wireless receiver (with dual volume controls) .................................
EJ-501IR infrared wireless receiver (with single volume control) ................................
8
Installation .................................................................................................................

1
EJ-501IR INFRARED WIRELESS RECEIVER
A
A1.
A2.
A3.
A4.
A5.
A6.
A7.
Main power switch
Infrared receiver module
F socket for external SENSOR 1
F socket for external SENSOR 2
AF OUT (6.3mm connector)
LOW / HI level switch
Power input
A1 A2
A3 A4 A5 A6 A7
EJ-501IR Dual-channel Infrared Wireless Receiver (with single volume control)
A

2
EJ-502IR INFRARED WIRELESS RECEIVER
B
B1.
B2.
B3.
B4.
B5.
B6.
B7.
Main power switch
Infrared receiver module
F socket for external SENSOR 1
F socket for external SENSOR 2
AF OUT (6.3mm connector)
LOW/HI level switch
Power input
B1 B2
B3 B4 B5 B6 B7
EJ-502IR Dual-channel Infrared Wireless Receiver (with dual volume controls)
B

3
1 2 3 4
1.
2.
3.
4.
CH.A: LED lights red when power is on; LED lights green when receiving signal
CH.B: LED lights green when receiving signal
AF: LED lights amber when sound outputs
Volume control and power switch (sensor)
1 2 3 54
INFRARED RECEIVER ILLUSTRATION
IR-501 Dual-channel Infrared Receiver Module
IR-502 Dual-channel Infrared Receiver Module
1.
2.
3.
4.
5.
CH.A volume control and CH.A power on
CH.A: LED lights red when power is on; LED lights green when receiving signal
AF: LED lights amber when sound comes out
CH.B: LED lights red when power is on; LED lights green when receiving signal
CH.B volume control and CH.B power on

4
INFRARED HANDHELD MICROPHONE ILLUSTRATION
EJ-501TI Infrared Handheld Microphone
Pull the battery door to the direction of the mesh head.
Place 2 pcs AA1.2V (Ni-MH 2500 mAh) batteries into the
battery case; batteries should be placed by in correct
direction of (+) and (-).
Battery has been installed, close and lock the battery door.
Battery installation for EJ-501TI
4.
Power indicator
3. Main body
5.
Power switch button
7. 3.5mm Mic/Aux input
Mesh head 1.
2. Top emitter
6.
Bottom emitter
9.
A/B channel switch
8. Talk/Mute switch
10.
Battery case
13. Charging contact
12. Hi/Low output power switch
11.
Battery door
118 9 10 12
12 3 64 5
13
7

5
FG
INFRARED HANDHELD MICROPHONE ILLUSTRATION
Please avoid your hand holding the top emitter and the bottom emitter
1. Select a channel by A/B Channel Switch (9)
* A CH -> Channel A (2.3 MHz)
* B CH -> Channel B (2.8 MHz)
2. Select output power by HI/LOW Selector (12)
* HI -> Distance can reach to 20 M; power consumption around 300 mA
* LOW -> Distance can reach to 15 M; power consumption around 200 mA
3. Has been installed properly, press the power switch button (5) for 1 second, and
then the power indicator (4) Indicate has been turned on.
* Lights green: power sufficient
* Lights red: power insufficient; please replace or recharge rechargeable
batteries.
4. Switch the button (8) to the Talk status when you intend to amplifier your speech;
switch the button (8) to the Mute status when you are temperately not using the
microphone.
Insufficient power influences the signal transmission. We
strongly recommend you using the capacity 2500 mAh
rechargeable batteries and dual-slot charger, HDC-502,
to maximize your performance.
6.
HDC-502
Operation Indication of EJ-501TI
Correctly hold EJ-501TI
5.
Press the power switch button (5) for 4 to 5 seconds
to turn the device off.
CAUTION !
Only Ni-MH rechargeable batteries are allowed to be charged. It may cause
leakage or explosion when charging un-rechargeable batteries.
Please take out batteries if the unit isn’t in use a period of time to avoid battery
leakage.

6
IRS-20 External Sensor
1 2 3 4 5 6
Single Reception Range
15M
150º
15
M
80º
External Sensor Installation
2
1
Screwed the four corners
to fix on the wall or ceiling Connect the external cable with F socket clockwise Counterclockwise direction to unscrew and adjust
your preferred angle;
clockwise to screw
tightly and fix the position
2
1
1.
2.
3.
Sensor power indicator
Infrared sensor
Screws for angle adjustment
4.
5.
6.
F socket for extension cable
Screws for wall mount
Extension cable to connect with GPA-500IR
EXTERNAL SENSOR ILLUSTATION

Allocation in a Middle-size Classroom
15M
EJ-501IR
Dual-channel Infrared Wireless Receiver
(with single volume control)
IRS-20
External Sensor
EJ-501TI
Infrared Handheld
Microphone
15
M
15
M
EJ-502IR
Dual-channel Infrared Wireless Receiver
(with dual volume controls)
Allocation in a Large-size Classroom
IRS-20
External Sensor
IRS-20
External Sensor
EJ-501TI
Infrared Handheld
Microphone
7
EXTERNAL SENSOR ILLUSTATION

8
INSTALLATION
LOW / HI Level Switch :
To link with lower sound source (ex. microphone input), we
suggest you switching to LOW level to avoid interference.
To link with other usual sound sources (ex. LINK IN, AUX
IN), we suggest you switching to HIGH level to avoid sound
ouput power is too low.
Infrared Wireless Microphone System Link
IRS-20
External Sensor
1
Amplifier
LinkAF OUT of EJ-501IR / EJ-502IR
with MIC IN of amplifier via a audio
cable with 6.3mm connection.
Singnal Output
2
Please use our provided AC
switching adopter.
EJ-501IR/502IR
(100--240 VAC/12 VDC,1 A)
Power Supply
3
IRS-20
External Sensor
EJ-501IR/502IR

9
MAINTENANCE GUIDELINES
Do NOT put the under the sun for a long period of time, or any other hot, humid
environments or place near flame. Stay away from any occasions which the
above might occur. Store the unit under cool and dry environment.
Avoid Heat, Humidity
After unpacking the unit for the first time, please charge the unit for about 8
hours. This is absolutely necessary as the built-in rechargeable batteries might
have been discharged naturally due to long shipment and storage time, even
though it has been fully charged in the factory prior to shipment. To secure a
longer life for batteries, please DO execute this IMPORTANT process.
Fully Charge BEFORE You Start Using for the Fist Time
Ensure batteries are fully charged BEFORE you store it for a long period. To
maintain a longer battery life and better performance, make sure you charge
the batteries regularly every month.
Charge Fully
This unit has DOD (depth of discharge) protection design. After the Power
Switch LED flashes red it means there isn't enough electricity (when operating
via the batteries), this unit will turn off automatically to secure battery from deep-
discharging damage. At this moment please immediately recharge your unit,
do not continue operation.
Notice : when you need to use the unit again after a long period of time, make
suer you charge it fully for at least 8 hours BEFORE any operation.
Notice : please also charge this unit every time after operation to maintain a
healthy battery life.

10
Check handheld microphone EJ-501TI and infrared receiver EJ-501IR / EJ-502IR stand
in the same channel.
Check the volume control of infrared receiver module if it is on or not.
Check EJ-501TI has been switched to Talk status.
Connections on back panel all properly.
No Sound Output
TROUBLESHOOTING
1.
2.
3.
Avoid rainfall or humid circumstance which may damage to the unit or electricity
shock.
Avoid the unit to be stroke or dropped.
DO NOT use the unorigianl power supply.
CAUTION
When using 2 pieces EJ-501TI at the same time, please make sure the 2 pieces
handheld microphone are in different channels to avoid interference.
Interference

SPECIFICATION
11
EJ-501IR / EJ-502IR Infrared Wireless Receiver
IR-501 IR-502
1 2
2 (CH. A: 2.3MHz / CH.B: 2.8MHz)
12 VDC
200 mA
128 x 88 x 37 (mm)
100 g
IRS-20
24 VDC
15 mA
133 x 103 x 48 mm
250 g
10 meters
80 º (Vertical) / 150 º(Horizontal)
15 meters
R-501 / IR-502 Infrared Receiver Module
Module
Volume control
Channels
Power supply
Current consumption
Dimensions (D x W x H)
Weight:
IRS-20 External Sensor
Module
Power supply
Current consumption
Dimensions (D x W x H)
Weight
Extended cable
Reception angle
Reception range
IR-501 (for EJ-501IR), IR-502 (for EJ-502IR)
850 nm
2 ch (CH.A: 2.3 MHz / CH.B: 2.8 MHz)
50kHz
32.768kHz
110 dB
70Hz ~ 10kHz (receiver)
20 meters (Hi) / 15 meters (Low)
F type
6.3 mm - AF OUT
LOW: 75mV / HI: 750mV
-10 ºc ~ +50 ºc
100 ~ 240 VAC / 12 VDC, 1 A
200 x 115 x 45 (mm)
750 g
Receiver module
Wave length
Channel Number
Max deviation
Tone
Dynamic range
Frequency response
Reception range
Input connector
Sound output
AF level switch
Operating temperature
Power supply
Dimensions (D x W x H)
Weight

EJ-501TI Infrared Handheld Transmitter
12
SPECIFICATION
Wave length
Battery power capacity
Carrier frequency range
Controls
Modulation
Output power
Battery
Battery life
Aux input level
Aux input impedance
S/N ratio
Distortion
Frequency response
Operation temperature
Max deviation
Dimensions (Dia x L)
Weight
850 nm
Green -> sufficient power
Red -> insufficient power
CH.A: 2.3MHz / CH.B: 2.8MHz
Talk / Mute
FM
20 meters (Hi) / 15 meters (Low); facing the external sensor
twoAANi-MH rechargeable (2500mAh) orAlkaline batteries
8 hours (2500mAh, power set to "Hi"); 11 hours (2500mAh,
power set to "Low")
200 mV (rms)
10k ohm
> 70 dB
< 1%
70Hz ~ 10kHz ( ±3dB)
-10 ºc ~ +50 ºc
±50kHz
38 x 198 (mm)
140 g (incl. batteries)

13

4F, No.11, Lane 125, Sec 1, Kuo Kwang Rd., Ta Li City,
Taichung Hsien, Taiwan
Tel:[phone] Fax:[phone]
E-mail:[email protected]
www.okayo.com
Rev. 01