blah blah said:
Norm I did bridge both poles into the positions that the copper clips would have bridged if installed. The copper clips fit into pockets so I could see exactly which pins should be bridged on each side when in the line in position when I took the switch apart.
I may have to take a picture so you can see...but I think it's right.
The headphone jack is dead too but can't figure out how that would affect the line in if they radio still plays in all modes...
Tim. Don't get confused and begin combining all the symptoms into one cause. You may have multiple issues. This is a fairly complex boombox. Focus on one issue at a time and you'll be able to work through it all.
Looking at the schematic, it appears that the line/phono switch is a 4-pole switch. S811, S812, S911, S912. It takes a pretty straightforward path to the function selector switch so I'm pretty sure that is the area where you should focus. If you wish, you can bring a jumper directly from line-in jacks to the function selector (through a series resistor) to eliminate any possibility of issues through the switch. This is in regards to your one dead channel issue.
The headphone jack issue. Keep in mind that the speaker output signal takes a circuitous series path through (1) the headphone jack, then (2) speaker jacks, then (3) to the internal speakers. But ONLY the hot positive circuit takes that path. The path back to ground is different in each case. So if your headphones are dead, but your speakers work good, then my intuition is to look at the headphone jack ground connection. Is it busted?
Also, you should know that the headphone jack and speaker jacks also have a built in switch, which is tripped when a plug is inserted.
I would say that a good overall cleaning and closeup inspection (with magnifying glass) of the aforementioned areas are definitely in order.