Pioneer A/V surround receiver model # VSX-D307 . Problem : In the front left channel audio was very distorted. Injection of sinewave showed that the negative going portion was clipped off completely. Checked my rail voltages to the PAC007 IC's and everything looked good. Sinewave going in was good too. Ordered a new PAC007 ......didn't fix it. Really pulled my hair out on this one. Turned out, an incorrect value resistor FROM THE FACTORY had been installed at location R483. Schematic called for 1.8k and unit had a 47k in it's place. Parts list didn't even list this part. It is part of the constant current source for the negative going amplifier inside the PAC007 location IC402. Here is the kicker : in the other channel, the part in the same location, doing the same job in the circuit, is a 47K ! And that is what the schematic calls for ! Yes it is the same PAC007 and ALL of the peripheral circuitry is the same. Go figure ! Anybody seen this before ? Or am I going nuts ? Keith Trumbla BEM Electronics Inc. Suite 212-530 Century St. WPG. MB. R3H 0Y4 Canada Ph.204.775.2875 Fax.204.774.9192 www.bemelectronics.com ***************************************************************************** Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/