board

I have two Lasonic TRC-920's with dead tuner boards. There are no schematic's for this radio. Does anyone have any idea on the best way to trace my way through a PC board or are there common tuner issues to look for. What I have figured out: Both tuners are getting power and have grounds. The...

The green lines - traces on the other side red - resistors (and the two yellow ones) blue - capacitors red triangles with a red line are transistors "603 21f" the line denotes BASE with C and E following counterclockwise The upper red BCE transistor is the one in picture 2, which I can't find...