Got a nice 250TX to fix for a friend.
Right channel has both outputs shorted E-C.
Otherwise it looks good, nice case, clean inside, decent FM reception, all the functions work.
I read in another post here that a decent replacement output for PNP: KSA1220A-Y, NPN: KSC2690A-Y.
That said, there are two microfuses on the emitter legs, does anyone know what the values should be?
I have the service manual, they show the fuses, but no mention of their values.
The two 120Ω resistors are totally smoked, They look like they're 1 watt, but again, no parts list in the manual.
If the outputs had a EC short and took out both 120Ω resistors (R829 & R831), that almost certainly implies the driver transistors Q805, & Q807, got taken out as well.
Motorola #'s TR01054-5 & TR02054-5 respectively. No idea how to cross reference them
Right channel has both outputs shorted E-C.
Otherwise it looks good, nice case, clean inside, decent FM reception, all the functions work.
I read in another post here that a decent replacement output for PNP: KSA1220A-Y, NPN: KSC2690A-Y.
That said, there are two microfuses on the emitter legs, does anyone know what the values should be?
I have the service manual, they show the fuses, but no mention of their values.
The two 120Ω resistors are totally smoked, They look like they're 1 watt, but again, no parts list in the manual.
If the outputs had a EC short and took out both 120Ω resistors (R829 & R831), that almost certainly implies the driver transistors Q805, & Q807, got taken out as well.
Motorola #'s TR01054-5 & TR02054-5 respectively. No idea how to cross reference them