Okayo GPA-850 User manual

GPA-850
Wireless Portable Sound System
UHF
[USER MANUAL]

Preface
GPA-850, the wireless Blueooth portable sound system is features a sturdy,
lightweight and compact solution as integrated for sound specialist. The
system is capable to play both of CD and MP3 file format and Bluetooth
connection.
Additionally, GPA-850 supports maximum two sets of wireless microphone
receivers which include individual frequency adjustors and volume controls
for great applications.
The system is powered by the built-in batteries (4.5 Ah x 2 pcs) and intelligent
power adaptor which can connect with the worldwide AC power directly; it
can last 4-6 hours when the batteries are fully charged. GPA-850 is mobile by
the strong trolley and power-efficient to support quality performance for both
of music and speech application in a wide range.
Product mix ….........................................................................................… 1
Illustration ……........................................................................................... 2
Controls and operation .............................................................................. 3
Wireless Receiver Module DR-701A ............................................................ 4
Wireless Receiver Module DR-700 ......................................................... 5 ~ 6
CD player CD-800S+ ..........................................................................… 7 ~ 10
Digital audio player UM-502P …........................................................… 11 ~ 12
WirelessLink Transmitter Module TX-701+...............................................… 13
Wireless Bodypack transmitterEJ-7T+ / EJ-7XT+ .................................. 14 ~ 15
Wireless Handheld microphoneEJ-701TS+ / EJ-701TM+ ........................ 16 ~ 17
Important Notes / Troubleshooting .............................................................. 18
Maintenance ….........................................................................................… 19
Specifications …................................................................................... 20 ~ 21
Contents

DR-701A
DR-700
TX-701+
GPA-850
GPA-850W
GPA-850WU
GPA-850WT
V
VV
GPA-850 series
CD-800R
UM-502P
DR-701A
V
V
V
V
V
V
V
V
V
Wireless Receiver
Module
CD  MP3 Player
Wireless link
Transmitter Module
Audio
Player
Wireless link
Transmitter
Module
Wireless Receiver Module
Model
GPA-850D
GPA-850DU
GPA-850DT
DR-700
1
Product Mix

5
6
7
8
9
12
13
10
11
3
4
1
2
2
Battery replacement
Get screws off Take battery out Get connection right –
RED for Anode;
BLACK for Cathode
Illustration
8. Power Switch, Battery /
Charging Indicator,
Wireless Link Transmitter Module
9. Master Control Panel
10. AC Power Input
11. Battery Cover
12. PU Wheels
13. Tripod Hole
1. Horn Tweeter
2. Speaker Holes
3. Speaker Grill /
Full Range Speaker
4. Ventilator
5. Trolley Handle
6. UHF Wireless Receiver Module
7. CD / MP3 Player

Bluetooth
1. Press or hold (12) in 2 seconds to switch Bluetooth on / off.
2. You will hear a tone and the indicator will light blue. The indicator will also
flash blue to indicate that it is ready to pair with Bluetooth device.
3. When it's in pairing mode, activate a Bluetooth connection scan on your
smartphone or tablet device. When the search is complete, select a device
named “Portable PA” from the pairing list and get it connected.
4. When the devices have successfully paired, it will sound a prompt tone again.
The indicator will light steady blue.
5. You are now ready to stream audio via the Bluetooth connection from your
smartphone or tablet as it's connected.
6. If a phone call is incoming during playback, the audio stream will be interrupted
for the user to take the call. When the call is finished, the Bluetooth module will
be relinked automatically and audio files will recommence playback from where
they were interrupted.
7. When a user moves out of range for the Bluetooth connection, the audio stream
will be severed until the user returns to a location within range of the module.
8. When Bluetooth is switched off, you will hear a prompt tone again.
3
1
8 10 11 12 13 14 157 169
2 3 4 5 6
1. Treble
2. Bass
3. Line in volume control
4. Aux in / Bluetooth control
5. Mic in volume control
7. Master
8. Voice priority indicator
9. Voice priority :
when it is activated, an indicator (8) will light up.
10. Line in (RCA)
11. Line out (RCA)
12. Bluetooth(indicator)
13. Aux in (Φ3.5 mm)
14. Aux out (Φ3.5mm)
15. MIC in 2 (Φ 6.3 mm)
16. Mic in 1 (XLR / Φ6.3 mm jack)
Controls and Operation

4
Turn “Receiver power on/off control” knob (7) clockwise until a click occurs.
A text of “ ” will appear on LCD window for about 2 seconds and it
follows a channel number. The turning-on is successful. To turn it off, just turn
the control counterclockwise until a click occurs. A text of “ ” will appear
on LCD window and will disappear after 2 to 3 seconds.
Press and hold “Up or Down” button (6) for 1 second until channel number is
blinking. Select a desired number through “Up or Down” button (6). A selected
channel number will be confirmed in 1 second if no more adjustment made to it.
Change channel manually
How SYNC works
“ ” function can find a clean channel and assign it to transmitter in the
range, about 3 M. Just turn on your microphone or transmitter first and press
SYNC button, in few seconds the progress will be done. During synchronization,
the RF indicator will blink.
Please complete channel setup in one receiver first and then a second one
when you have more than 1 receiver.
Be sure to give different channel number to each receiver.
Wireless Receiver Module DR-701A
1. LCD Window
2. Antenna A and B indicator
3. RF signal indicator
4. AF signal indicator
5. Synchronization button
6. Channel up / down adjustment
7. Receiver power on / off control
and volume adjustment
Operation and Setting
15 6 74
3
2

5
15
4
3
2
Wireless Receiver Module DR-700
1. LCD Window
(Display Channel Number /
Reception Strength)
2. Channel A
Power Switch and Volume Control
3. Up / Down Frequency Selector
4. Frequency Set Key
5. Channel B
Power Switch and Volume Control
Operation and Setting
Switch on/Switch off
1. Turn “Channel A / B” knob (2) / (5) clockwise until a clickoccurs, thenLCDwindow
willbeonand atextof“On”willappearonLCDwindow. After 1 ~ 2 seconds,
the LCD window will show a channel number and signal strength, it means the
receiver module switched-on successfully.
2. Vice versa, turn “Channel A / B” knob (2) / (5) counterclockwise until a click occurs, 
then LCDwindowwillshowa text of “OFF” for about 2 ~ 3 seconds. LCD window will
be off after this procedure, switched-off successfully.
Setting and Selection of Channels
Press and hold “SET” key (4) to enter the mode of selecting the channels
1. While both Channel A and Channel B are available, the channel number of Channel
A shown on LCD window starts to blink. Press “Up” or “Down” FrequencySelector
keys (3) to look for your preferred channel number. Press “SET” key (4) again to
confirm the channel setting.
2. While only Channel A or Channel B is available, switch the channel number of
Channel A or Channel B directly.
3. If you don’t press any key for more than 10 seconds, it will leave the channel-
switching mode with channel number kept.
4. Channel A and Channel B cannot be set with thesamechannelnumber.
Searching for Available Channels
1. Press “Up” and “Down” FrequencySelectorkeys (3) simultaneously formorethan
1 second, andthenLCDwindowwillshow a text of withoutblinking. 
ChannelAandChannelBwillbeswitchedtoavailablechannelsautomatically.  
Ifthereisnoanychannelavailable, thechannelnumberswillstillremainthesame.

SD / SDHC
POWER Vari-Speed DIGITAL AUDIO PLAYER
SPEED RAN/ENT.
REP/ID3
010
VOL
PLAY STOP/EJ
PREV. SKIP F.WD
FOLDER
MUTE
PROGRAM
MODE
POWER : Press to switch on / off the power.
VOLUME : For adjusting the volume level.
STOP / EJ : Press to stop playing and press to disk ejected. Press again to insert CD.
MODE : Press to switch to USB, SD or CD mode.
PLAY / II : Press once stat to play, press again pause to stop.
SKIP F.WD : Press once, back to the beginning of current track. Press again to desired
SKIP - PREV : Press to desired next track. Press and hold the button for fast forward.
FOLDER : Select folder. Available for playing MP3 format.
Press FOLDER or to select desired folder.
previous track. Press and hold the button for fast backward.
MUTE : Mute function.
Press PROG. LCD display shows “PROGRAM” then use FOLDER and SKIP buttons
to select desired track.
Repeat above step to store more tracks.
PROG : To memorize the self-set tracks
To play the memory track, press PLAY / PAUSE, LCD DISPLAY shows “MEMORY”
and then start to play.
Press PROG again to cancel the program function.
USB Connector : Accepts USB.
LO : To adjust slow-speed play. Press once, the screen will indicate speed: -1,
press one time, it will be -1. It has 10 steps of speed variation.
SD Connector : Accepts SD Card and MMC Card.
NOR : Press to back to normal speed.
Press again, LCD display shows “Enter” to confirm the “PROG” function.
(pls see “PROG” section for operating program function.)
Press to play all songs in a random order. The LCD display shows “RANDOM”.
RAN / ENTER : Randomly play and confirmation bottom.
HI : To adjust high speed play. Press once, the screen will indicate speed: 1,
press one time, it will be +1. It has 10 steps of speed variation.
REP / ID3
Press once, LCD shows “REPEAT 1”, repeat all tracks.
Press twice : Repeat Folder (For MP3 format).
Repeat :
rd
Press 3 time : REPEAT ALL : repeat current track.
Press again to cancel Repeating function.
Id3 : Press ID3 button for 3 seconds, the LCD shows the information such as
the title, album, track number, file format . The information to be stored
in the file itself.
Master Controls
7
CD player CD-800S+

LCD Display
Note
SD / MMC Card
This player can accepts 12 cm discs like CD, CD-R, CD-RW , MP3 disks and USB and
SD / MMC reader playing, but please do not intend to play the CD-ROM / CD-I / CDV,
8 cm discs or computer CD.
Insert SD Card or MMC Card into the insert hole of SD/MMC CARD in the face plate.
Pull the card to get stuck with the tenon. It then finished the assembly.
When taking out the card, please push the card to the bottom and then release to
shout it out. Please don't use the force to pull it out. If so, it will damage the card
and the machine.
When inserts the disk into CD player or takes out the disk, it is necessary to let CD
player insert disk and return automatically. It is prohibited to push or take out the
disk by hand before the disk completely return from CD player, thus will cause the
machine to be broken down and unable to operate normally.
MP3：When being MP3 mode, the display panel shows MP3.
CD：When being CD mode, the display panel shoes CD.
When repeatedly playing the single track, it shows REPEAT 1.
When all songs at the folders are playing repeatedly, it shows REPEAT ALL.
When in playing mode, it display , when pausing, the panel shows .
When it appears REPEAT FOLDER, it refers to playing the tracks repeatedly from a
specific folder.
SHUFFLE : Play in a random mode.
PROGRAM : When operate program tracks.
MEMORY : When playback memory tracks.
A B：When repeat playing between A and B.
：Under the MP3 mode, it will appear the folder numbers.
:
：Display the current playing track.
：Display the time for the current playing track.
VOLUME : Turning to adjust & control the desired volume.
8
CD player CD-800S+

EJECT
PLAY/II
LOW NOR HIGH
RAN
ID3
STOP
F.B F.F
REV.
ENTER
F.WD
SPEED
PROG
REPEAT
1 2 3
456
78 9
0
FOLDER
MODE
A
B
FOLDER : To select desired folder. Press FOLDER button , each press will
go to next folder.
MODE : Selection USB, SD or CD.
Then press to start playing.
EJECT : Press to stop playing and press to disk
ejected gradually.
RAN : Press to select in random order. Press again to cancel
random playing function.
Functions on Remote Controller
Numeral 0 ~ 9 : Select numerals. Selects the track from numerals.
PROG : To memorize the self-set tracks
Press PROG. LCD display shows “PROGRAM” then use
FOLDER and SKIP buttons to select desired track.
Press ENTER button to confirm.
Repeat above step to store more tracks.
To play the memory track, press PLAY / PAUSE,
LCD DISPLAY shows “MEMORY” and then start to play.
Press once, LCD shows “REPEAT 1”, repeat all tracks.
Press twice : Repeat Folder (For MP3 format).
REPEAT : Repeat mode
rd
Press 3 time : REPEAT ALL : repeat current track.
Press again to cancel Repeating function.
: PLAY / PAUSE. Press play or pause playing.
: Press to fast forward.
: Press to fast backward.
: Stop to play
: Press to next track.
: Press to previous track.
: I t is the zone memory function. During Playing, press A point will start
to memorize. Press again to memorize B point, and start repeating
playing point A - B Memory Zone. Press again to cancel A→ B Function.
A
B
A
B
A
B
: ENTER.
Speed - To adjust SLOW / HIGH / NORMAL speed play.
Press to to adjust high speed play.
Press to adjust slow-speed play.
The unit offers 10 bands of speed variation. Press Back to normal play.
: ON / OFF Mute.
LOW
NOR
HIGH
ID3 : Press ID3 button for 3 seconds, the LCD shows the information such as the
title, album, track number, file format . The information to be stored in the
file itself.
9
CD player CD-800S+

CR2025
3V
CR2025
3V
When using the remote controller, the remote controller shall be appointed to
the receiving hole of face plate. The optimal receiving distance is 3 meters.
(the available distance is 5 meters.) The batteries ( model CR2025 3V) shall
be put into the remote controller.
CD player CD-800S+
10

88 88 88
: :
888 888
SD U SB
FOLDER
5
4
3
21
6 7 9 108
11 12
13
14
4. When both SD card and USB are installed, USB has higher priority to be readout.
5. Do not pull SD card out directly or it might be damaged. Just push it a bit forward
and it will be ejected.
3. Press (5) to Play or to Pause any audio track.
2. Press (2) to play previous audio track; press (3) to play next audio track. Press
(4) to stop any playback.
1. Press and hold (10) for 1 second to turn this player on. Press and hold (10) for 1
second to turn it off.
Operation
1. LCD window
2. Previous track / volume down
(works during playback)
3. Next track / volume up
(works during playback)
4. Stop
5. Play / Pause
6. SD/MMC port
7. USB port
8. Sensor
9. Repeat / Folder select
10. Power
11. Volume down (MUTE when in minimum level)
13. Volume up
13. Mute
14. Folder select
Digital Audio Player UM-502P
11

6. Repeat / Folder Select:
a. There are 3 modes for repeat during audio playback.
To repeat a track.
To repeat all tracks in all album.
To repeat all tracks in a single album.
b. When not in playback, press (9) to select a desired folder/album with NEXT,
PREV buttons. Finally press PLAY to end the setting.
7. During playback, press VOL+ to increase volume; press VOL- to decrease volume.
Digital Audio Player UM-502P
12

16
5
478
3
2
WirelessLink Transmitter Module TX-701+
1. LCD Window
2. TX Indicator
3. AF indicator
4. Frequency SET
5. UP / DOWN
6. Power/ Volume Knob
7. Battery / Charging Indicator
8. Main Power Switch
Operations
1. Switch on the main power switch (8) and clockwise the power/ Volume knob (6),
LCD WindowandTXindicatorlightson (2), LCDscreendisplayONwithin 1-2
seconds.
2. In ON mode, switch the power off and anti-clockwise the volume knob, LCD
Window showsOFFwithin2-3seconds.
Press Frequency SET button enter into the selection mode, LCD Window will blink
and shows channel , pressUP / DOWNbuttonintodesiredchannelor
quitwithoutsettingin 10 seconds.To display current used channel, simply press
UP / DOWN button.
ON / OFF
Channel Selection
13

1
2
3
4
5
6
7
8
9
10
11
1. Antenna
2. Mute Control
3. Power Switch
4. 3.5 mmpush-in (EJ-7T+)or
 Mini-XLR (EJ-7XT+) MicrophoneInput
5. LED Power Indicator
6. Sensitivity Selection
7. AUX In (3.5 mm)
8. Frequency Set
9. LCD Window
10. Turn Up / DownFrequenciesKeys
11. Recharge Jack
Operation and Setting
Turn-on
Turn-off
Setting of Channel
Display of Channel
Turn on the “Power Switch” (3), theLCD window will show “On” andtheBacklight
& “LED Power Indicator” (5) willbelighton.After 1 second, the LCD window will
show channel number and battery life indicator.
Turn off the “Power Switch” (3), the LCD window will show “OFF” with backlight
on, and then turn off.
After turning on the unit, the current channel is shown on the LCD window.
Press “Frequency Set” key (8) for 2 seconds to until the channel number stats to
blink, and then press “Up” or “Down” key (10) to select the channel from 1-96.
Press “Frequency Set” key (8) again to confirm the setting of channel or it will return
back to the original channel number after 10 seconds without pressing “Frequency
Set” key (8).
 The transmitter and the receiver should be set on the same channel.
Press “Up” or “Down” key (10) or press “Up” and “Down” keys (10) simultaneously to
show current frequency value on the LCD window. The LCD window will go back to
normal after releasing fingers from keys.
Wireless Bodypack Transmitter EJ-7T+ / EJ-7XT+
14

HDC-707
HDC-702
CAUTION!!
Take out batteries when the devices won’t be operated in a long time.
DO NOT attempt to charge Alkaline battery. It will lead to battery
leakage or even explosion!
6. The performance of signal transmission is highly
involved with battery energy. Batteries with 1600
mAh (or above) in capacity are recommended.
The optional charger HDC-702 / 707 is an economy
solution for you daily use.
Notice: This function is available while only working with DR-701A
Frequency Pairing
1. After turning on the unit, the frequency pairing will be run once within 10 minutes.
TheLEDPowerIndicatorwillbelightoninblueforthreetimesandthebacklight
ofLCDwindowwillbeonaswellwhilefrequencypairingsuccessfully. While
changing toanewchannel,theLEDPowerIndicatorwillbelightoninblue
constantly.
2. Press “Frequency Set”key(8)forlessthan2secondstoenablefrequencypairing
functionagain. Duringtheprocess of frequency pairing, the LED Power Indicator
will be light on in blue blinkingly together with channel number blinkingly
shownonLCDwindow. If frequency pairing successfully, new channel numberwill
beshownonLCDwindow unblinkingly andthe LED Power Indicator will be light on
in blue constantly. If frequency pairing unsuccessfully after turning-on for 20
seconds, it will back to the original channel number with LED Power Indicator light
oninblue constantlyandthe original channel number remained without blinking.
Wireless Bodypack Transmitter EJ-7T+ / EJ-7XT+
15

23 4 5 6 7
1
8911
LOW
HI
MUTE
10
1. Mesh head
2. Handheld tube
3. Setup button
4. LCD window
(channel, frequency, battery energy)
5. Up / Down button
6. Power indicator
7. Power ON / OFF button
8. HI / Low / Mute
sensitivity selector
9. Battery door
10. Charging port
11. Button cap
1. Take off button cap (11) and pull off battery door (9).
2. Insert batteries correctly. (two AA 1.2 V Ni-MH rechargeable
batteries or 1.5 V Alkaline batteries) Put the button cap (11)
back.
CAUTION !
Wireless Handheld Mic EJ-701TS+ / EJ-701TM+
Put Batteries in Microphone
3. This action ensures the battery door is locked and to prevent
from falling off. Insert 2 pcs of 1.5 V AA alkaline batteries or
1.2 V AA rechargeable batteries into the battery case, and then
close the battery door (9) tightly.
DO NOT use larger capacity battery.
(e.g. the Ni-MH battery with over 2300 mAh might
be stuck in battery room and can't be taken out!)
16
The differencesbetweenEJ-701TS+ and EJ-701TM+aremeshheadandcartridgeonly.

Operation and Setting
Turn-on / Turn-off
Setting of Channel
1. Press “Power Switch”key(7)for 1 secondtoturnontheunit. TheLCDwindowwill
show“On”firstandthenshowchannelnumberandbatterylifeindicator after 1~2
seconds. The LED Power Indicator will be lightoninblueaswell.
2. Under any situation, the unit can be turned off if pressing “Power Switch” key (7)
for more than 2 seconds.
After turning on the unit, the current channel isshownontheLCDwindow.
Press “Frequency Set”key(5)formorethan2secondsuntil the channel number
starts to blink, and then press “Up”or“Down”key(5)toselectthechannel
from1-96. Press“Frequency Set”key(3)againtoconfirm the setting of channel
number or it will return back to the original channel number after 10 seconds without
pressing any key.
HDC-702
The performance of signal transmission is highly involved with
battery energy. Batteries with 1600 mAh (or above) in capacity
are recommended. The optional charger HDC-702 is an economy
solution for you daily use.
CAUTION!!
Take out batteries when the devices won’t be operated in a long time.
DO NOT attempt to charge Alkaline battery. It will lead to battery
leakage or even explosion!
Frequency Pairing
1. After turning on the unit, the frequency pairing will be run automatically once.
2. The LED Power Indicator will be light on blinkingly in blue for three times and
then constantly while frequency pairing successfully.
3. Press “Frequency Set”keyforlessthan2secondstoenablefrequencypairing
functionagain.If frequency pairing unsuccessfully after turning-on for 20 seconds,
it will back to the original channel number with LED Power Indicator lightoninblue
constantlyandthe original channel number remainedwithoutblinking.
4. The distance forfrequencypairingshouldbelessthan3meters.
Notice: This function is available while only working with DR-701A
Wireless Handheld Mic EJ-701TS+ / EJ-701TM+
17

Troubleshooting
No Sound Output
Be sure transmitter and receiver stay at same channel.
Be sure volume control on transmitter and receiver are turned properly.
Be sure Master is turned properly.
Be sure Mute button is not on.
Check if transmitter and receiver stay at same frequency band.
Check if there is huge air interference nearby.
Failed to Power On
Be sure batteries are allocated and put in correct direction.
Be sure power adapter is plugged well.
Important Notes
Caution
1. DON’T operate the device in the rain or in humid circumstance to prevent
failure.
2. Prevent the device from dropping.
3. Apply factory recommended power supply to this system only. It is dangerous
and risky when employing a not qualified power.
※
18
Notice: The changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate
the equipment.
FCC INFORMATION
The Federal Communication Commission Radio Frequency Interference Statement includes the following paragraph:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
The equipment has been tested and found to comply with the limits for a Class B Digital Device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instruction, may cause harmful interference to radio communication.
However, there is no grantee that interference will not occur in a particular installation. If this equipment dose cause harmful interference to
radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
IMPORTANT NOTE: To comply with the FCC RF exposure compliance requirements, no change to the antenna or the device is permitted.
Any change to the antenna or the device could result in the device exceeding the RF exposure requirements and void user's authority to
operate the device.
Consumer Alert
Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system
without a license is subject to certain restrictions: The system may not cause harmful interference; it must operate at a low power
level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device. Purchasers should
also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change.
For more information, call the FCC at 1–888–CALL–FCC (TTY: 1–888–TELL–FCC) or visit the FCC's wireless microphone Web site at
http://www.fcc.gov/cgb/wirelessmicrophones.
This device complies with part 15 of the FCC Rules.
Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.