You need to confirm that each of the sets of contacts are clean if you don't have a replacement. The image is for a 4 position switch but positions 2-4 are the same. Your switch is double this one. Confirm that you read 0 ohms between the two bridged contacts for each position.
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I don’t think the switch is the issue .
I get 13 volts on the pads for the switch . If I jump the pads like earlier in the thread I get 13 volts on pin 1 of U106
I get 13 volts on the pads for the switch . If I jump the pads like earlier in the thread I get 13 volts on pin 1 of U106
What's the resistance between pins 1 and 8?
From what you've posted, the switch most definitely appears to have problems. They may not be causing the DC to be present but I think it has problems.
From what you've posted, the switch most definitely appears to have problems. They may not be causing the DC to be present but I think it has problems.
I’m going back to a previous post .
Jumpers are in place for the master slave switch . A jumper is installed between U106 pin 7 and R139 amp has audio output but very low and distorted and I get 14 volts on pin 1
Jumpers are in place for the master slave switch . A jumper is installed between U106 pin 7 and R139 amp has audio output but very low and distorted and I get 14 volts on pin 1
Between pads 1-8 on U106 I get 6.28M ohm
I used jumpers instead of a switch and the problem is still there I get 13 volts on pin 1 of U106 . I jotted I had voltage on the pads for the the master slave switch .
But I’m not sure where the voltage is coming from on the pads for the master slave switch which is causing the issue
I used jumpers instead of a switch and the problem is still there I get 13 volts on pin 1 of U106 . I jotted I had voltage on the pads for the the master slave switch .
But I’m not sure where the voltage is coming from on the pads for the master slave switch which is causing the issue
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Ok I pulled the EQ card out of the amp and then voltage issue went away .
There is an ic on the board wondering what the likeliness of it being bad is ? The master slave switch connects on one of the pins on the ic wondering if that’s causing the issue
There is an ic on the board wondering what the likeliness of it being bad is ? The master slave switch connects on one of the pins on the ic wondering if that’s causing the issue
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Amp is finally fixed !! I appreciate all of your help Perry .
Whatever ic was defective on the eq card was causing the issue with U106 Pin 1 . I had a spare eq card swapped them out and the issue went away and all switches / pots work correctly
Whatever ic was defective on the eq card was causing the issue with U106 Pin 1 . I had a spare eq card swapped them out and the issue went away and all switches / pots work correctly
You posted that you went back to a point where you had voltage. You would have wanted to go back to where you had good clean audio and then introduce ONE change at a time, checking for a change.
The DG201 is a switch used to select between local or remote bass control.
Was the telco-jack shorted (pins inside) on the other card?
The DG201 is a switch used to select between local or remote bass control.
Was the telco-jack shorted (pins inside) on the other card?
The jack is on the main board of this amp .
the only other 2 things that could have been bad on the board was a TL072 opamp or the pot for the eq settings
the only other 2 things that could have been bad on the board was a TL072 opamp or the pot for the eq settings
This amp was like something you'd expect if someone took a bunch of junk parts and put them all into one amp.
Back to this amp . I tested it and worked fine for 2 hrs with 0 issues . Give it back to the guy he hooks up 6 sub woofers to the amp and blows the outputs . Do all 8 outputs need to be replaced ? It blew 4 of them out of 1 of the banks . Can I replace the 4 or should I replace all 8
If the rail switchers survived, you may be OK to change only 4 but all took about the same stress.
There are 4 banks of 2 transistors.
There are 4 banks of 2 transistors.