ONKYO TX810 frontend

[Brasto]

I have this ONKYO TX810 Tuner/Amplifier which lost FM reception
intermittently. Using the coldspray and the heatgun I have isolated
the problem to the Frontend subassy. Unfortunately I neither have a PL
or a schematic to further fault isolate the problem.
The frontend is manufactured by ALPS but no other markings.
Is there anybody out there on the WWW who can shed some light on this
tuner? (Mark can you help me again?)

TIA
Bram

 

[Mark D. Zacharias]

I have this ONKYO TX810 Tuner/Amplifier which lost FM reception
intermittently. Using the coldspray and the heatgun I have isolated
the problem to the Frontend subassy. Unfortunately I neither have a PL
or a schematic to further fault isolate the problem.
The frontend is manufactured by ALPS but no other markings.
Is there anybody out there on the WWW who can shed some light on this
tuner? (Mark can you help me again?)

TIA
Bram

If it's indeed intermittent I would certainly try resoldering the front end.
Pretty common problem back in the day - though I don't see it too often
these days outside of TV tuners.

Try it and see. If that doesn't help maybe we can look at some other stuff.

Mark Z.

 

[Brasto]

If it's indeed intermittent I would certainly try resoldering the front end.
Pretty common problem back in the day - though I don't see it too often
these days outside of TV tuners.

Try it and see. If that doesn't help maybe we can look at some other stuff.

Mark Z.

Hello Mark,
That's what I tried before, I have even taken the front end out
completely and played Sherlock Holmes with my magnifier glass. After
all this heating/cooling/soldering I probably have killed a
tempsensitive component/coil/trace as the tuner now is completely
dead. I tried to locate a source for a replacement frontend but no
luck so far.
It could help if you have the pin-outs or schematic of the
frontend....

 

[Mark D. Zacharias]

I sent the manual to you directly.

mz

 

[Brasto]

Hello Mark,
That's what I tried before, I have even taken the front end out
completely and played Sherlock Holmes with my magnifier glass. After
all this heating/cooling/soldering I probably have killed a
tempsensitive component/coil/trace as the tuner now is completely
dead. I tried to locate a source for a replacement frontend but no
luck so far.
It could help if you have the pin-outs or schematic of the
frontend....- Tekst uit oorspronkelijk bericht niet weergeven -

- Tekst uit oorspronkelijk bericht weergeven -

Hello Mark,
Just a Thank You message...
I took the front end completely apart, its shielding cover has 16 or
so solder joints to the PCBoard.
Again a thorough inspection did not reveal any obvious shorts. I
temporarely reinstalled the front end without any shields and the
Onkyo was back to normal life, it tuned/stored/played as advertised.
Did some more poking/tapping and it remained stable. Removed the
frontend again and carefully reapplied the shielding covers. Once more
the tuner back into the mainboard and the job was done.
Thanks again for your great longdistance diagnosis and schematic
support...Another fine product saved from getting trashed.

 

[Mark D. Zacharias]

Hello Mark,
Just a Thank You message...
I took the front end completely apart, its shielding cover has 16 or
so solder joints to the PCBoard.
Again a thorough inspection did not reveal any obvious shorts. I
temporarely reinstalled the front end without any shields and the
Onkyo was back to normal life, it tuned/stored/played as advertised.
Did some more poking/tapping and it remained stable. Removed the
frontend again and carefully reapplied the shielding covers. Once more
the tuner back into the mainboard and the job was done.
Thanks again for your great longdistance diagnosis and schematic
support...Another fine product saved from getting trashed.

Glad that seems to have worked out. Not sure I'd bury that unit too deep in
the stack until it's proven that it's really fixed, though...

Perhaps the bad solder was where the front end soldered to the board?


Mark Z.