shardian
New member
Okay so I have two Polo monitors that are dead. One is plain dead, the other has flyback sparking. I've only dug into the sparking one, so let's start there. I'll cover the other later this weekend.
When powered up, the flyback emits sparts out of the top. No picture.
-The fuse is good
-The HOT is good.
- Diode D142 and R255 have been literally blown off the board. R157 appears to be suspect, as it is next to these two components.
-The 4 Ohm 10 Watt resistor is suspect. Measuring from the inside of the legs gave me an initial reading of 5.2 ohms. Measuring from the outside game me either 11.5 or had trouble reading. These readings were taken with resistor in-circuit. I need to pull it out of circuit to verify. It is probably being influenced by the circuit.
-Everything else looks good. I did not see any cold solder.
Any thoughts?
When powered up, the flyback emits sparts out of the top. No picture.
-The fuse is good
-The HOT is good.
- Diode D142 and R255 have been literally blown off the board. R157 appears to be suspect, as it is next to these two components.
-The 4 Ohm 10 Watt resistor is suspect. Measuring from the inside of the legs gave me an initial reading of 5.2 ohms. Measuring from the outside game me either 11.5 or had trouble reading. These readings were taken with resistor in-circuit. I need to pull it out of circuit to verify. It is probably being influenced by the circuit.
-Everything else looks good. I did not see any cold solder.
Any thoughts?
