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The first voltage check for 5VDC passed. Soldered controller chips and VDC test at VR1, VR2 and VR3 all read 0.0 through full range of the pots. 24VDC applied at TB5.
Any ideas?
A bit of additional info: TB6- to U5 was 22.5 vDC
and TB6- to U4 was 5 VDCThe pot is in a simple voltage-divider circuit.
- Potential that U8 and/or U9 are upside down
- resistor missing/not installed
Do you still have 5V at the test point?
Following up on some older questions – did you have an update?
BrianV
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