Onkyo Audio Players & Recorders - Popular Questions, Answers, Tips & Manuals

‘I have a onkyo av receiver Tx-sr309 that is stuck on BD/DVD mode and no other keys/buttons on the receiver nor the remote functions. Not possible to do factory reset as well. Kindly help’ Of course, no reset is allowed due to single task MPU.

This is a very easy issue to fix and a common faulty situation found in onkyo AV-amp. If you want to know how to fix, just send an email to me if you want. It is up to you to do so and email will be deleted after ONE week. I won‘t tell you here due to buying faulty AV amps to repair and sell them out on web.

Onkyo Audio... | 32 views | 1 helpful votes

Hi Roberto, if you can use the UBT-1 unit on your Onkyo HT-R990, since it has a USB input
Regards Franco Dosil

Hola Roberto, si puedes usar la unidad UBT-1 en tu Onkyo HT-R990, ya que este cuenta con entrada USB
Saludos Franco Dosil


Onkyo Audio... | 29 views | 0 helpful votes

You have already pointed out the problem:
Problem is Det.Protect: I.
How to fix :
(1)download 545/535/525 service manual.
(2)check all power transistors CE & BE resistances
if theyy are very low ,0 ohm, or infinity.
(3)check all 0.22 ohm resistors if they are open
or turning greater.
(4)Check the biasing circuit with a small rating
transistor and an orange color variable resistor.
(5)Check all channels.

Onkyo Audio... | 21 views | 0 helpful votes

If A + B selection is offered

Onkyo Audio... | 31 views | 3 helpful votes

Hi Bob, for what you say, your remote control has problems in the ignition, try to disassemble it and clean the plate of the accounts, with a little liquid glass cleaner, you will observe, as a accumulation of rubber residue, on the contacts in the remote control platelet, clean and dry very well
Let it dry very well, then assemble it again and see if it is solved
Comment the results
Greetings Franco Dosil

Hola Bob, por lo que comentas, tu control remoto tiene problemas en el encendido, prueba desarmarlo y limpia la placa de los contactos, con un poco de liquido limpia vidrios, vas a observar, como una acumulaci?n de residuo de goma, sobre los contactos en la plaqueta del control remoto, limpia y seca muy bien
D?jalo secar muy bien, luego armalo nuevamente y prueba si se soluciono
Comenta los resultados
Saludos Franco Dosil

Onkyo Audio... | 29 views | 1 helpful votes

Your replacement remote (control) is not functionally equivalent to the other.

Onkyo Audio... | 284 views | 0 helpful votes

When the device stay on STBY it means it is in a protection mode.
means also safe mode so it wont make more damage.
Try this my friend.
1: please check speakers cables.
If you have some knowledge in Electronics
test on the supply board in/out volts and power Amp voltage (Not on the transformer)
check with diagram as shown


Onkyo Audio... | 65 views | 0 helpful votes

can you add a foto of the error plz so i can see what you have!

Onkyo Audio... | 52 views | 0 helpful votes

You need to check several voltages
(2)FLAC1 and FLAC2
(3)drive signals to FL needs a digital storage oscilloscope to observe waveform. Or replace chip directly.
This is a full picture.


Onkyo Audio... | 66 views | 0 helpful votes

Good luck my friend. A needle in a haystack, sorry!!

Onkyo Audio... | 18 views | 0 helpful votes

"Tone Control is not working when I push the button but the light will go on and off." Download TX8511 service manual. Tone control circuit involving balance, bass and treble circuit is defective. Check circled componets or replace them all. If replacing them all, balance circuit should also be replaced.


Onkyo Audio... | 59 views | 0 helpful votes

“Hi, Onkyo TX SR 705 have a super cap for memory presets ou eeprom?? ”
Yes, it may have a 5.5V cap with 0.1F for memory to use .When the power is down and it loose the presets, whats the problem?? Tks
Don't worry, it will be charged up when the amp is On. The longer the time it is on, the longer the time it charged.For your case, replace the cap mentioned above can fix the problem. I will post the photo later.

After checking the onkyo TX-SR705 service manual, however, I did not find any capacitor of 5.5V 0.1F on the schematics. The EEPROM is powered by a polar capacitor. See photo.

Step of repairing
(1)Download the onkyo TX-SR 705 service manual.
(2)Find out the EEPROM located at Main Microprocessor Unit.
(3)Replace the capacitors of epprom
(4)If the problem doesn't solve, copy
all data form the old EEPROM by a SPI EPPOM reader.
(5)Buy a new SAME MODEL EEPROM and copy the old data to
the new one.
(6)remove the old defective one from the circuit board
(7)put the new one with data copied to the circuit board.7abf1fe5-29df-4e3d-98b4-8e2ba153ec59.jpg

Onkyo Audio... | 72 views | 2 helpful votes

"ONKYO tx-nr737, when I am connected via Bluetooth to my iPhone for music I get a SP Wire message. " The wifi and bluetooth part is defective, replacing it may fix your problem. See photo how a good wifi and bluetooth works.


Onkyo Audio... | 39 views | 0 helpful votes

does it make any sound when you click the eject button? please explain the problem in brief.

Onkyo Audio... | 29 views | 0 helpful votes

"I accidentally touched a speaker wire to the metal spikes on the bottom of my speaker. " This action makes +B voltage (positive voltage) short to ground. You may assume 2 power transistors mounted on a large heat sink are defective. Now try to remenber which speaker terminals was accidentially shorted. Then check this terminal or you should check all power transistors mounted on the heat sink, by measuring the collector and emitter resistance. Normal value is Mega ohms and all white 3 pins resistor with 0.22ohm should also be checked if they are open( infinity resistance).I have tried to reset it several times to no avail. Of course, due to defective power transistors. Is my receiver done? Yes. I wrote detailed troubleshooting steps used in onkyo service dept. a year ago, just find it out in my answers.210cda21-872d-438d-949c-2196ccf76712.jpg

For your case, DET. PROTECT: I instead if entering debug mode.forum.php-1foajingjd1ngrzzacwcq31h-2-2.jpeg
NG L R BL BR, This amp is under DC protect.

Onkyo Audio... | 34 views | 0 helpful votes

“HT-R340 DSP Debug Mode” Does it show DSP ??????? Place a photo here to show more detail if you want.

Onkyo Audio... | 48 views | 0 helpful votes

"Volume knob not working on my onkyo tx-ds656"
replace the volume knob but check the volume control IC first such as voltage and whether an analog signals come out by an oscilloscope.

and " lost remote " Check if the onkyo remote is working, by:
(1)point a mobile or a smart phone camera at an onkyo remote control.
(2)Don't take any photo.
(3)Now the remote picture is on the mobile or smart screen.
(4)Press any remote control key.
(5)White flashing light can be seen if remote is ok.
(6)If remote is fine, replace the remote senor on tx-ds656 with same part number.

Onkyo Audio... | 33 views | 0 helpful votes

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