Scucci
Well-known member
Okay, here's the deal. I was working on getting one of the monitors from the "graveyard" up and going. G07 is SEVERE Ms. Pac burn, but whatever... monitor's a monitor.
Anywho, width coil is broken off... I have replacement coils, but not bothering with that till I get SOMETHING on the screen.
I hook the monitor up to my Pole Position... turn it on, and I get a high pitched squeal out of it... sounded like what I heard last time a cap blew up in my face.
Anywho, I get the meter.. check the voltages on the big resistor... you know the one, I can't remember the number for it off the top of my head. I get 150V on my side, 35V on the CRT side. So... booboo'd. I check all the 900 diodes and transistors, they're good... unless I missed one.
Then, going by the flowchart here, I check C511, it's lose... the guy that had the monitor before me did half a cap kit apparently and managed to lift the trace on the + side (no idea how he managed that one). I repair that, and hook her back up... same measurements but the squeal is gone (thank God).
I've never had the flowcharts fail before... they're usually spot on. What else could cause under voltage to the extent I'm seeing?
Side note... the resistor (the big white one... ... you know the one), got hot as hell REALLY fast... I turned the monitor off after a few seconds and a good 2 mins later it was still hot enough to burn my finger. ... think that guy's failing? I've managed to bring several monitors back from the dead, and if that's the case... this would be the first time I've ever seen that resistor do anything buck kick ass, as intended.
Anywho, width coil is broken off... I have replacement coils, but not bothering with that till I get SOMETHING on the screen.
I hook the monitor up to my Pole Position... turn it on, and I get a high pitched squeal out of it... sounded like what I heard last time a cap blew up in my face.
Anywho, I get the meter.. check the voltages on the big resistor... you know the one, I can't remember the number for it off the top of my head. I get 150V on my side, 35V on the CRT side. So... booboo'd. I check all the 900 diodes and transistors, they're good... unless I missed one.
Then, going by the flowchart here, I check C511, it's lose... the guy that had the monitor before me did half a cap kit apparently and managed to lift the trace on the + side (no idea how he managed that one). I repair that, and hook her back up... same measurements but the squeal is gone (thank God).
I've never had the flowcharts fail before... they're usually spot on. What else could cause under voltage to the extent I'm seeing?
Side note... the resistor (the big white one... ... you know the one), got hot as hell REALLY fast... I turned the monitor off after a few seconds and a good 2 mins later it was still hot enough to burn my finger. ... think that guy's failing? I've managed to bring several monitors back from the dead, and if that's the case... this would be the first time I've ever seen that resistor do anything buck kick ass, as intended.
