[R-390] Line audio output problem.

[Flowertime01 at wmconnect.com]

Greetings all!

 Local audio is fine but line output has a problem.  No audio across the 
output.  However one side of the line to the center-tap has audio but the 
other side to center-tap has no audio and the VU meter is bouncing away(yes the 
jumper is in place).  I haven't had a chance to dig into this yet but was 
wondering if anyone has seen this as well to possibly save me some time.


John,

Grab your trusty schematic and ohm meter.
The line output transformer output side has wires coming out of the audio 
deck in several ways. All through the audio output connector jack. There are 
two connectors to the Audio deck. One is mostly power supply and audio 
input. The other jack is mostly audio output. The audio output of the transformer 
goes to the line meter. Since the meter works the problem is between there 
and the terminal board. The center of the transformer goes to a jumper pair 
on the terminal board. 

Mostly one wire or pin on an audio connector goes open. Mostly in the 
harness side of the connection because of the sharp bend in the harness. This is 
also why you get open pins in that connector. 

Once you find the problem, you may remove a harness clamp from the harness 
near the audio connector to get a bit more freedom. You also may want to 
remove the harness clamp to drop the front panel.

Good luck and happy troubleshooting.

Roger AI4NI