Troubleshooting a 6100 monitor in Black Widow, can use some help. Read 6100 FAQ, numerous threads but can't seem to find a solution.
Symptoms
- Low B+, stuck at ~25VDC. Adjusting pot does not change voltage. Black screen
Checked
Typical Monitor chatter
Neck glow present
Spot Killer not lit
No static felt on screen
Tested deflection board on different 6100 monitor, works fine
All chassis transistors check good
HV transistors good
PCB works (using extension cable in another cabinet)
Replaced:
- Caps
- ZD901/902/903
- Q900/901/902/903/904
Any advice on what to check next? Have (2) HV cages doing the same thing, been swapping parts trying to get a working unit with no luck.
Symptoms
- Low B+, stuck at ~25VDC. Adjusting pot does not change voltage. Black screen
Checked
Typical Monitor chatter
Neck glow present
Spot Killer not lit
No static felt on screen
Tested deflection board on different 6100 monitor, works fine
All chassis transistors check good
HV transistors good
PCB works (using extension cable in another cabinet)
Replaced:
- Caps
- ZD901/902/903
- Q900/901/902/903/904
Any advice on what to check next? Have (2) HV cages doing the same thing, been swapping parts trying to get a working unit with no luck.

