I have a Saturn on the bench that has several issues, but the frequency counter is the main one. It uses the EPT210010A board. All 2's are displayed as 6's. I have recapped, replaced the voltage regulator, and D603. Voltage is slightly low, 4.87v from D603. I have tested several other components, and cant figure it out. Any Ideas? Has anyone replaced this board with a different type?
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Early Galaxy Saturn frequency counter problem
- Thread starter Spams24
- Start date
To turn a "2" into a "6" the a segment has to be shut off when it should be on and the e segment turned on when it should be off.
All the later frequency displays wire the digits in an altogether different format from that one. Just not remotely compatible with the display wiring in a pre-1995 saturn. Having digit segments that light up when they should be dark is either a soldering fault that's bridging the 'e' segment of the digits to another segment's drive line, or a bad 5203 chip. They don't fail that often, but they do from time to time.
A more-common fault is segments that stay dark when they should be on. Tends to be caused by solder problems. An attempt to fix that fault could have bridged two adjacent foil pads together.
73
All the later frequency displays wire the digits in an altogether different format from that one. Just not remotely compatible with the display wiring in a pre-1995 saturn. Having digit segments that light up when they should be dark is either a soldering fault that's bridging the 'e' segment of the digits to another segment's drive line, or a bad 5203 chip. They don't fail that often, but they do from time to time.
A more-common fault is segments that stay dark when they should be on. Tends to be caused by solder problems. An attempt to fix that fault could have bridged two adjacent foil pads together.
73