VFD Modular Clock Troubleshooting

Most problems encountered while putting together the vfd clock can be traced back to bad soldering connections.

5V is unstable

• Check the solder points, and reinforce any point that looks doubtful.
• Double check the orientation of the diodes is correct.

Ptc fuse gets warm

This is an indication that there might be a short somewhere: Check all solder points to see if any of them have solder bridges.

High voltage is unstable

• Check all solder points
• Double check that the resistors are correctly placed.
• Incorrect resistor placement will give incorrect output voltage. if the voltage is wildly off, do not attempt to connect the tubes.