darko
... and never give up!
Relay Click Out when pressing "MAIN DIRECT" Switch
Hi Fellows,
At my new A-960 it is the same Issue...
When pressing the Button "MAIN DIRECT" in,
the Power is going down, Relay is switching out.
Power ON Bulb is going off.
On All Inputs, with A/B or without A/B Speaker Switch.
Any Constelation, in any Positions.
I get the Pots and Gliders in great working Order now.
The Checks are done, 10mA Bias both, ~1mV DCOffset, 54,7+B, 1,2V Opto.
So, no DC-Offset is on the Outputs.
I have repaired a nice bunch off Vintage Gear for now,
but this Problem is driving me nuts. Everything seems working fine,
until pressing "MAIN DIRECT" Switch.
There must be some short to Ground, when Bypassing all Tone Controls.
What, when the PRE is bringing DC Voltage? With all Tone Controls in the Path,
the DC Voltage is maybe more less, decrease. Then "directly" switched to the
Protection Circuit kicks the Relay out??
The Only Thing, I not have made bymyself is, replace the Bulbs.
They was replaced before, by the Pre-Owner. No Shorts. Maybe wrong Bulbs?
Help, I need some Advice, what to check!
Best Regards,
Darko
Hi Fellows,
At my new A-960 it is the same Issue...
When pressing the Button "MAIN DIRECT" in,
the Power is going down, Relay is switching out.
Power ON Bulb is going off.
On All Inputs, with A/B or without A/B Speaker Switch.
Any Constelation, in any Positions.
I get the Pots and Gliders in great working Order now.
The Checks are done, 10mA Bias both, ~1mV DCOffset, 54,7+B, 1,2V Opto.
So, no DC-Offset is on the Outputs.
I have repaired a nice bunch off Vintage Gear for now,
but this Problem is driving me nuts. Everything seems working fine,
until pressing "MAIN DIRECT" Switch.
There must be some short to Ground, when Bypassing all Tone Controls.
What, when the PRE is bringing DC Voltage? With all Tone Controls in the Path,
the DC Voltage is maybe more less, decrease. Then "directly" switched to the
Protection Circuit kicks the Relay out??
The Only Thing, I not have made bymyself is, replace the Bulbs.
They was replaced before, by the Pre-Owner. No Shorts. Maybe wrong Bulbs?
Help, I need some Advice, what to check!
Best Regards,
Darko