|
|
|
|
|
#1
08-01-2017, 12:50 PM
|
||||
|
||||
|
Can't really remember if this set had the small control board (bright, contast, color tint) in front but if it does, look for bad solder joints on it.
Also, tap the chromacolor switch (rectangular switch that goes yellow green or orange when depressed) and see if it causes your problem. It gets dirty for scant usage and can give the problem you describe. TriFocus tubes ALWAYS look great! 
|
|
#2
08-01-2017, 12:59 PM
|
||||
|
||||
|
...and just to add that in addition to the thin film power resistor (between the output transistors on the CRT board) Zeno mentioned, some CRT boards had a 1/2 watt 1K resistor in the G2 circuit - it'll be on the left of the CRT board looking from the back. Anyway, that 1/2W resistor will increase in resistance or open intermittently, causing loss of G2 voltage and dim pix.
__________________
Brian USN RET 22YRS (Avionics/Cal) CET-Consumer Repair and Avionics ('88) "Capacitor Cosmetologist since '79" When fuses go to work, they quit!
|
 |
| Thread Tools | |
| Display Modes | |
|
|
Hybrid Mode
