My much loved SR-501 suddenly lost audio. The display works fine -- tuner, presets, everything seems normal except both audio channels are out, as if a protection circuit had cut in. It's not headphones or A/B speakers. Anybody seen this in an Onkyo receiver? With 40 years of bench and electronics experience I can fix anything -- just need a schematic. Where can I get one?

Sr501 lost audio

My much loved SR-501 suddenly lost audio. The display works fine -- tuner, presets, everything seems normal except both audio channels are out, as if a protection circuit had cut in. It's not headphones or A/B speakers. Anybody seen this in an Onkyo receiver? With 40 years of bench and electronics experience I can fix anything -- just need a schematic. Where can I get one?

Anonymous Oct 03, 2012

Never mind, fixed it myself. It was a break on the preamp ckt board.

5 Related Answers

Anonymous

1 Answer
Posted on Mar 31, 2008

SOURCE: Amp Protection Mode

from LANCE P: I fixed it. Be sure that all your speaker connections are perfect. No element frays that can arc, no +/- problems, no single barely connected wire. My problem was volume sensitve and I evidently had one + wire that was loose in the back. I corrected it and ran it all day with surround and good volume with no problems. So diligently check ALL YOUR SPEAKER CONNECTIONS, both in the back of the unit and at your speakers

Francisco Mauricio G

1551 Answers
Posted on Jun 11, 2008

SOURCE: Onkyo Tx-v940 Receiver/Amplifier Protection Mode

Audio amplifier IC's damaged you need to change it.Good luck

Anonymous

1 Answer
Posted on Jul 28, 2008

SOURCE: Onkyo receiver audio problem

I have Found two problem which cause NO AUDIO 27-07-08
[email protected]

1.Failed connection between top &bottom of circuit board NCDG-6575 (Dolby --DTS) processing board.

Near & under IC Q710

2.Failed componet IC Q710 part # LC372100PT
IF you disconnet CKT board NCDG-6575
you will get audio on speaker B left & right CH only

SOLUTION have CKT board NCDG-6575 Repaired or REPLACED

Anonymous

1 Answer
Posted on Apr 05, 2009

SOURCE: Onkyo TX-SR606 getting no sound from HDMI sources

Not sure if this is your fix, but I had what I thought was the same problem. I played with my Onkyo quite a bit ensuring the correct assignments for HDMI, audio and all that stuff. Turns out I neglected to make sure the output devices were properly assigned. Many devices aren't default to output sound over HDMI. I changed the audio out settings on the cable box to HDMI and suddenly the Onkyo worked great. I know, I'm an idiot for not checking that in the first place, but maybe someone out there is having the same trouble as well.

Anonymous

4234 Answers
Posted on Apr 26, 2009

SOURCE: receiver does not power on. standby not on either

The standby light should be on. If it is not, then check the main fuse. WIth the unit unplugged, remmove hte top cover and check the fuse by the line cord. If that is ok, then you will need to check the primary winding on the standby transformer. That transformer has a thermal fuse internally located and that sometimes gets blown due to a power surge. If you do not have the equipment to test this, get a detailed estimate from a local servicer. The standby transformer usually costs arounf $25 or so.

Dan

Add Your Answer

Upload

Upload an image from your computer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

Loading...

Include an image. It's worth a thousand words.

prev next

Related Questions:

2helpful

1answer

Marantz Legacy Series - no sound is getting to speakers from tuner or cassette.

It seams like the amplifer is not working and you are right but it certanly needs to be measured first.

Read full answer

Nov 28, 2013 • Marantz Tr 2242 Sb Legacy Series Pll...

0helpful

1answer

I have a fishman presys plus on board pre amp. it was working then suddenly no sound is coming out. The tuner is working fine. when i plug my guitar chord, the led light indicator blips one, which is...

This is an indication of an internal component failure. The unit needs to be sent in for service. It requires special tools and skill to service.

Read full answer

Jan 21, 2012 • Fishman Music

0helpful

1answer

I have a Motorola DCP 501 Everything seems to work except the clip type speaker hook-ups no faults displayed

Hello
There are Center Speakers, Surround Speakers[L&R] and Front speakers[L&R]. Which amoung this show fault? Please clarify more about your Amps' problem.
Include the details of fault by FixYa comment box. OK.

Read full answer

Jul 10, 2011 • Motorola DCP-501 Receiver

1helpful

1answer

Hi, I have a Harman Kardon AVR 300 that I picked up at a local sale. When I power it on, it switches fine to each input except the AM/FM tuner (the preset, tuning, & tuner mode buttons don't seem to...

Hello Sir, Hi, you may try the following

try cleaning the switches
if this does no solve the problem, its the selector circuit. this may be digital, so you need to search the IC that selects the FM mode both with tuning. this is fair complicated.
buy a cheap separate FM tuner, run it on auxiliary input.

Read full answer

Mar 22, 2011 • Harman Kardon AVR 300 Receiver

0helpful

1answer

My Escape Radio, CD, and Aux input will not work. My temp gauge works, but all music controls do not, except for the load and eject buttons for the CD player. I replaced three fuses that according to my...

Which three fuse's did you replace ? You should check for B+ voltage on both side's of the fuse . Two little metal tabs on top of the fuse. Voltage on both , fuse is good .
Try radio self-diagnostic mode .
A fluctuating AC voltage audio signal is sent to the speakers directly from the audio unit to reproduce sound. The audio unit has a self-diagnostic mode that can be entered by pressing preset buttons 3 and 6 simultaneously.
Visual Inspection Chart Mechanical Electrical

Audio unit
Antenna or antenna cable
Speaker mounting/speaker cones
Radio ignition interference capacitor, radio frequency interference suppression bond, or radio receiver hood bonding strap

Smart junction box (SJB) fuse(s):
- 7 (10A)
- 12 (5A)
- 16 (15A)
Battery junction box (BJB) fuse(s):
- 7 (40A)
- 15 (20A) (Hybrid)
- 16 (25A)
- 21 (40A)
- 22 (40A) (Hybrid)
- 23 (40A) (Hybrid)
Subwoofer amplifier
Circuitry
Audio unit

If the concern is visually evident, GO to Symptom Chart .

If the concern is not visually evident, proceed to the Speaker Walk-Around Test and the Audio Unit Self-Diagnostic Mode.

Speaker Walk-Around Test (Except Premium CD6)
NOTE: To enter the speaker walk-around test or audio unit self-diagnostic mode, the audio unit must be turned on and in the radio tuner mode (AM/FM).

To enter the speaker walk-around test, simultaneously press the audio unit preset buttons 3 and 6.

The speaker walk-around test stops at each speaker and applies sound to each speaker for about 1-2 seconds. Each speaker is tested and displayed on the audio unit in the following sequence: RF, LF, LR, RR and SUBWOOFER.

To exit the speaker walk-around test, turn the ignition switch off, turn the audio unit off, or press preset button 1 for diagnostics (DIA).

Audio Unit Self-Diagnostic Mode (Except Premium CD6)
NOTE: To enter the speaker walk-around test or audio unit self-diagnostic mode, the audio unit must be turned on and in radio tuner mode (AM/FM).

To enter the following tests, press the desired preset button while in the speaker walk-around test or while in the audio unit self-diagnostic mode.

To exit the audio unit self-diagnostic mode, turn the ignition switch or the audio unit off.

If the concern remains and the fault is not detected, GO to Symptom Chart to continue diagnostics.

The self-diagnostic mode has 6 manual tests available:
- Preset button 1 = ENTER DIAGNOSTICS. This test enters diagnostics from the speaker walk-around test. Metrics are available with SEL and ON buttons indicating time played in AM/FM, media, number of buttons pressed, etc.
- Preset button 2 = EEPROM BLOCK STATUS. This test shows the validity of memory to calibrate the clock, and seek sensitivity.
- Preset button 3 = EXIT DIAGNOSTICS.
- Preset button 4 = Software configuration level. This test queries each radio system controller for its software configuration level.
- Preset button 5 = DISPLAY TEST. This test lights all the display segments for five seconds and then turns all segments off.
- Preset button 6 = RAM CONTENTS READOUT. To enter these tests, press preset button 1 while in the speaker walk-around test, then the desired preset button.

To exit the self-diagnostic mode, turn the audio unit or the ignition switch off.

If the concern remains and the fault is not detected, GO to Symptom Chart to continue diagnostics.

Read full answer

Oct 06, 2017 • 2008 Ford Escape

0helpful

1answer

I have a bose speaker and the wires are thick.i couldn't seem to insert the wires into my TX SR 501 receiver.

What model Bose? If the speaker wires have molded ends they are possibly NOT electrically compatible with anything but the electronics they were sold with.

Read full answer

Jan 11, 2011 • Onkyo TX-SR501 Receiver

0helpful

1answer

I am trying to turn on my sirius radio (it has been working for 1 year) and all of a sudden it says 'check sr tuner'. Everything seems to be plugged in right yet it still won't turn on. Any ideas?

Page 62: If "CHECK SR TUNER" or "ANTENNA ERROR" appears in
the front panel display, the connection of the SiriusConnect
tuner or antenna is incorrect. In such cases, check the
connection of the SiriusConnect tuner and the antenna (see
page 115).
• If "NOT SUPPORTED" appears in the front panel display, this
unit does not support the connected SiriusConnect tuner.
----

Or the SR Tuner is fluky. Refer to its manual and start over with IT as the product, not the Yamaha.

Read full answer

Jul 13, 2010 • Yamaha RX-V663 Receiver

1helpful

1answer