texasmame
Well-known member
Got a Galaga boardset that isn't displaying the starfield but everything else is fine.
All the research I've done points to the 05xx chip as the starfield generator. Got a new 05xx chip from the person here who sold me this board but still no starfield after swapping.
Reflowed the socket for the 05xx and tested continuity for each leg with the bottom of the PCB - they all test good. So, looks like the socket is not the problem. Legs nice and clean on the chip, too.
Where else to look? The schematic shows several other chips also sending input to the 05xx but I've yet to see a post anywhere online that points to something other than the 05xx as creating issues with the starfield.
The R1 thru R8 all test within tolerance in circuit, too.
Thoughts, suggestions?
TIA!
All the research I've done points to the 05xx chip as the starfield generator. Got a new 05xx chip from the person here who sold me this board but still no starfield after swapping.
Reflowed the socket for the 05xx and tested continuity for each leg with the bottom of the PCB - they all test good. So, looks like the socket is not the problem. Legs nice and clean on the chip, too.
Where else to look? The schematic shows several other chips also sending input to the 05xx but I've yet to see a post anywhere online that points to something other than the 05xx as creating issues with the starfield.
The R1 thru R8 all test within tolerance in circuit, too.
Thoughts, suggestions?
TIA!

