Reply Sony STR-V444ES
 

Sony STR-V444ES speakers audio isnt kicking in.
Good audio to the Headphones is fine.
Scoped audio up to relays is fine.
but still 27 Volts across relay coil. No signal to drop one side low and thus kick in the relay.
WHY ??? ayone run into this before?

Yes i have looked for DC, and there isnt any.
Also there are 4 different relays, Front-Rear L&R None of them are kicking in.

Reply Sony STR-V444ES
 

wrote in message
...
Sony STR-V444ES speakers audio isnt kicking in.
Good audio to the Headphones is fine.
Scoped audio up to relays is fine.
but still 27 Volts across relay coil. No signal to drop one side low and
thus kick in the relay.
WHY ??? ayone run into this before?

Yes i have looked for DC, and there isnt any.
Also there are 4 different relays, Front-Rear L&R None of them are
kicking in.


The fact that none of the relays is dropping in, is neither here nor there -
except to indicate that the problem is likely *not* related to any
particular relay driver. To avoid unncessary duplication, the fault
monitoring and switch on delay circuitry, will be a single entity,
monitoring all channels simultaneously, and acting on all relay drivers
simultaneously. Thus, any fault ( DC offset, over current, over temp etc )
detected on *any* channel, will cause *all* relay drivers to be inhibited.
So, I would suggest that your problem lies either with the fault monitoring
circuitry itself, or the fact that it is genuinely detecting a problem on
one or more channels.

Arfa

Reply Sony STR-V444ES
 

Arfa Daily wrote:
wrote in message
...
Sony STR-V444ES speakers audio isnt kicking in.
Good audio to the Headphones is fine.
Scoped audio up to relays is fine.
but still 27 Volts across relay coil. No signal to drop one side low
and thus kick in the relay.
WHY ??? ayone run into this before?

Yes i have looked for DC, and there isnt any.
Also there are 4 different relays, Front-Rear L&R None of them are
kicking in.


The fact that none of the relays is dropping in, is neither here nor
there - except to indicate that the problem is likely *not* related
to any particular relay driver. To avoid unncessary duplication, the
fault monitoring and switch on delay circuitry, will be a single
entity, monitoring all channels simultaneously, and acting on all
relay drivers simultaneously. Thus, any fault ( DC offset, over
current, over temp etc ) detected on *any* channel, will cause *all*
relay drivers to be inhibited. So, I would suggest that your problem
lies either with the fault monitoring circuitry itself, or the fact
that it is genuinely detecting a problem on one or more channels.

Arfa

I think I've seen a couple bad 1 ohm resistors in the power supply cause
this. They're at the rear corner of the machine.

Mark Z.