Hi This set has a horizontal line.IC 502 which is a TDA 8170 was replaced but to no effect.There is a saw tooth input of about 0.2Vp whereas the specs require a 2.5Vp.IC501 which generates the sawtooth is TEA2028B. Gordon Elder Audio video Technician, Lewis Satellite Shadowed lawn, Brittons Hill, Barbados. --------------------------------- Do you Yahoo!? Yahoo! Mail - Helps protect you from nasty viruses. ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/