02-16-2025, 12:42 AM
Welcome to the Philco Phorum Jeff, A Phamily Phriendly Phorum phull of phine pholks phluent in Philco and other radios, TVs, etc. (Note a pattern here? And how's that for alliteration?)
Jeff, offhand, unfortunately, your issue sounds like a soft picture tube. There are several causes of a dark picture, but a weak CRT is one of the most common causes of a dark picture.
If you can find the model number and a pic of the TV functioning, please post. Also please post the CRT number. I am not an expert on Predictas, but I fixed my share of TVs. Some of these sets are transformer powered, others have a series heater string. Some of these sets have CRTS whose filaments are rated 2.5V, so this must be known before attempting to use a "CRT Brightener".
There are several parts that go bad even sitting, especially the electrolytic filter capacitors. in addition, any paper dielectric caps should be replaced. Resistor values must also be verified.
The bottom line is that all employ dangerously high voltages and if the picture tube breaks physically with covers removed, it implodes, throwing glass all over the place. Please read and heed all safety precautions and wear protective equipment. On "hot chassis" models, please use an isolation transformer. Please follow the "one hand" rule. If you are uncomfortable with high voltage, please refer servicing of this unit to experienced persons
Keep watching this thread and post your prigress.
Again, Welcome!
Jeff, offhand, unfortunately, your issue sounds like a soft picture tube. There are several causes of a dark picture, but a weak CRT is one of the most common causes of a dark picture.
If you can find the model number and a pic of the TV functioning, please post. Also please post the CRT number. I am not an expert on Predictas, but I fixed my share of TVs. Some of these sets are transformer powered, others have a series heater string. Some of these sets have CRTS whose filaments are rated 2.5V, so this must be known before attempting to use a "CRT Brightener".
There are several parts that go bad even sitting, especially the electrolytic filter capacitors. in addition, any paper dielectric caps should be replaced. Resistor values must also be verified.
The bottom line is that all employ dangerously high voltages and if the picture tube breaks physically with covers removed, it implodes, throwing glass all over the place. Please read and heed all safety precautions and wear protective equipment. On "hot chassis" models, please use an isolation transformer. Please follow the "one hand" rule. If you are uncomfortable with high voltage, please refer servicing of this unit to experienced persons
Keep watching this thread and post your prigress.
Again, Welcome!
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis
Best Regards,
MrFixr55