Onkyo tx-sr606 fluorescent display not working

[Jblues]

Hi I've had this on my receiver and fixed by replacing a bad cap on the video board a 470uf 63v cap end bulged out surprising as it was a nichicon but only rated for 85 degrees Celsius this was in addition to replacing the caps twice on the HDMI board. its a good receiver just needs fans to cool it surprising some models had them going by the service manual just not all. going to look into adding them from the schematic for now I have a fan on top sucking the heat out I suggest anyone else do the same.

[stj]

Re: Onkyo tx-sr606 fluorescent display not working

that's a terrible design putting caps near heatsinks!

[Jblues]

Re: Onkyo tx-sr606 fluorescent display not working

I agree on that but there must be tons of these out there with bad caps and filling land fills as any one else would just junk it and buy new but its not a bad Receiver when it works still has Audessy new ones don't. Heat is the big killer in this one so I just put a Quiet 120 v fan on top to vent the heat so far so good! Why only some got the fans is probably Onkyo's cost cutting ?

[drobson2]

Re: Onkyo tx-sr606 fluorescent display not working

I found my cap to be bulged out identically to your picture.

Is there any trick to changing that cap out? I've got it apart enough to have access to the bottom of the board. I though I read somewhere that I can just start pulling/twisting on the cap and it will come apart. I can then use the left-behind leads to solder the new cap to. Is that correct or do I need to completely de-solder the old one and and then solder in the new one?

Thanks a bunch,
Dave

[madan1]

Re: Onkyo tx-sr606 fluorescent display not working

No, do not pull/twist that sort of caps. You can do that with SMD caps ( the small metal ones ), but doing it to thru-hole components, you might damage the board.
Just get the board out and desolder the bad cap(s)... it is not that hard, just take photos on every step you make and you will be good.
Also pay attention to the cable connectors.. if I remember right, those onkyos have the "push" type cable connectors ( push the connector and then pull the cable ). When connecting back the cables, be careful to put each wire in its hole.

[drobson2]

Re: Onkyo tx-sr606 fluorescent display not working

Thanks much!

[tmho]

Re: Onkyo tx-sr606 fluorescent display not working


Hi, I got the same receiver and the same capacitor with problem. But I do not know how to remove the ribbon cable from the connector so as to take out the PCB. That connector does not look like the press and pull type. Could jblues and madan1 please help?

[RJARRRPCGP]

Re: Onkyo tx-sr606 fluorescent display not working

Is this a post-1990s receiver? Definitely looks like it is! That kind of bullshit is typical of certain kinds of post-1990s stuff, which the frequenter folks of the badcaps.net message board, know too well!

[re-atari]

Re: Onkyo tx-sr606 fluorescent display not working

Hi, I got the same receiver and the same capacitor with problem. But I do not know how to remove the ribbon cable from the connector so as to take out the PCB. That connector does not look like the press and pull type. Could jblues and madan1 please help?

Depressing the top part of this connector unlocks the wires inside the connector, so you can pull the flatcable out. This type of connector fooled me as well when I had to fix my TX-SR803 a few years back. I think the SM describes how to disconnect the flatcable.

To prevent damage to the flatcable I used a flat screwdriver to depress the top of the connector.

Do support the PCB's bottom when putting force on the connector to prevent the PCB from flexing. It's made of a material (phenol) that tears/breaks quite easily. Pertinax PCB material has already been around for ages, and yet manufacturers continue to make use of lower quality phenol PCB's, like Onkyo did here. Onkyo certainly isn't not the only one, though.

re-atari

[tmho]

Re: Onkyo tx-sr606 fluorescent display not working

Depressing the top part of this connector unlocks the wires inside the connector, so you can pull the flatcable out. This type of connector fooled me as well when I had to fix my TX-SR803 a few years back. I think the SM describes how to disconnect the flatcable.

To prevent damage to the flatcable I used a flat screwdriver to depress the top of the connector.

Do support the PCB's bottom when putting force on the connector to prevent the PCB from flexing. It's made of a material (phenol) that tears/breaks quite easily. Pertinax PCB material has already been around for ages, and yet manufacturers continue to make use of lower quality phenol PCB's, like Onkyo did here. Onkyo certainly isn't not the only one, though.

re-atari

I followed your method and successfully removed the cable. Thank you.

[tmho]

Re: Onkyo tx-sr606 fluorescent display not working

I have one more question. There is a bigger cap (16V 10000uF) beside the defective 63V 470uF cap as per Jblues photo above. At the bottom of the bigger cap, there is some white stuff. In my case, there is also white stuff at the bottom of both caps. The white stuff seems came out from the caps. Does that mean the bigger cap is defective and should be replaced although the top of it does bulge out?

[petehall347]

Re: Onkyo tx-sr606 fluorescent display not working

i would change them all whilst in there.

[R_J]

Re: Onkyo tx-sr606 fluorescent display not working

The white stuff is glue used to secure the larger cap to the board, It does'nt come from the caps.

[tmho]

Re: Onkyo tx-sr606 fluorescent display not working

The white stuff is glue used to secure the larger cap to the board, It does'nt come from the caps.

Thank you. You save me the money on buying that cap.

[Secured]

Re: Onkyo tx-sr606 fluorescent display not working

2021, and your post helped me. Thanks

Hi I've had this on my receiver and fixed by replacing a bad cap on the video board a 470uf 63v cap end bulged out surprising as it was a nichicon but only rated for 85 degrees Celsius this was in addition to replacing the caps twice on the HDMI board. its a good receiver just needs fans to cool it surprising some models had them going by the service manual just not all. going to look into adding them from the schematic for now I have a fan on top sucking the heat out I suggest anyone else do the same.

[Geraps]

Re: Onkyo tx-sr606 fluorescent display not working

Hi I've had this on my receiver and fixed by replacing a bad cap on the video board a 470uf 63v cap end bulged out surprising as it was a nichicon but only rated for 85 degrees Celsius this was in addition to replacing the caps twice on the HDMI board. its a good receiver just needs fans to cool it surprising some models had them going by the service manual just not all. going to look into adding them from the schematic for now I have a fan on top sucking the heat out I suggest anyone else do the same.

thanks for the solution !!!

[assenheimer]

Re: Onkyo tx-sr606 fluorescent display not working

In my case the display is very weak. I can barely see the display.
Any suggestions?
Thanks!

[debruina]

Re: Onkyo tx-sr606 fluorescent display not working

In my case the display is very weak. I can barely see the display.
Any suggestions?
Thanks!

Maybe its just dimmed? press dimmer button, otherwise check ac line to display

[assenheimer]

Re: Onkyo tx-sr606 fluorescent display not working

Maybe its just dimmed? press dimmer button, otherwise check ac line to display

The dimmer button goes even darker. When I press the dimmer button the display appears bright for a second and then goes very dark again.

[lotas]

Re: Onkyo tx-sr606 fluorescent display not working

In my case the display is very weak. I can barely see the display.
Any suggestions?
Thanks!

Replace the display power capacitors (anode voltage and filament voltage).