dbxdx5
Super Member
Service manual contains no artwork. Check trackside that there are traces going to the legs of the trimmers.
I'm going to re-check the solder joints and traces.
Last edited:
Service manual contains no artwork. Check trackside that there are traces going to the legs of the trimmers.
That should be about where it trips the protection relay to shut off. The only scenario I could imagine for the relay is if the coil is somehow shorted to the contacts but that's a long shot!
It's more likely the pot isn't soldered in correctly. Exactly where are you measuring the offset?
I have NO 2325 here to look at so I am basing this off the service documentation, which can be risky.
I can't edit images at the moment so I am going to have to try and explain this.
On the new pot, Pin 1 goes in the hole on the pad with R711. Pin 3 goes in the hole in the pad that goes to R712.
I think this is what you have now. You then need to add a jumper wire from the hole in the pad with R711 to pin 2 of the pot.
In other words, jumper the pad circled in red in your picture to the center pin on the new pot.
Hope this helps.
Tom
The jumper goes from R710's pad to pin 2 of the pot. I have fixed my post. Sorry.
Tom
You probably know this already, but, there should be a positive voltage (black meter lead to chassis) on the end of the pot that connects to R711 and a negative voltage on the end of the pot that connects to R712. Pin 2 of the DC offset pot should vary from the positive voltage to the negative voltage as you rotate it from end to end. 0VDC offset (at the output) should occur when pin 2 of the pot reads near zero volts.
Tom
I doubt it's the relay.
I see no reason that C703 being a bi-polar would cause a problem unless it is shorted.
Meter set to read DC Volts, black lead to chassis, measure with the red meter lead:
Measure the offset on one end of L701 or on the pin spaced away from the others on J701. This is ahead of the speaker relay.
Does the voltage change when you adjust the trimmer? Can you set it to zero volts?
Tom
The wiper only goes to R710 NOT anyplace else, looks like i'st connected to the trace under the trimmer.
Craig
Do you have pin 2 of the pot going anywhere else other than R710? If you have it going to the trace directly below the pot that trace is ground if your board is the same as in your picture. Did the original pot go thru that hole? The whole outer case of the old pot was the wiper contact correct? The original pot had 4 soldered contacts correct? One for each end of the fixed resistor and two, the case, for the wiper correct?
Craig