davemcl
Member
Ok, I got a new HV unit, looks clean & recapped. I cleaned & dried the HV diode & connectors & springs & reinstalled. I changed the 4 transistors on the monitor frame. Soldered solid copper wire at R100 & R101. Installed Bob Roberts cap kit on deflection PCB & replaced bad fuses at F100 & F101. Refowed solder at all headers & anwhere else on defection board that looked at all questionable (by reflowed meaning desoldering first, then resoldering.)
When plugged into working asteroids deluxe, first got flashing red light on game PCB. Turned off game, then back on, got quick green flash upper right corner of back of CRT, but red light on PCB stayed on this time. After a few seconds the monitor displayed normal game picture, but very faint. I left it on for a couple minutes to see if the brightness changed or improved, maybe slightly, but not much.
I turned it off, pulled the monitor to check things out. Noticed the fuse at F101 was blown.
Discharged monitor pulled both boards & went over everything one more time. Didn't see anything that looked funky, so figured I'd try again. No picture at all this time & it blew the fuse at F101 again. Noticed also that the ceramic resistor at the top of the HV board was generating a decent amount of heat & also that the monitor was doing some humming.
I checked the monitor frame transistors for shorts, they're OK.
Any suggestions????
When plugged into working asteroids deluxe, first got flashing red light on game PCB. Turned off game, then back on, got quick green flash upper right corner of back of CRT, but red light on PCB stayed on this time. After a few seconds the monitor displayed normal game picture, but very faint. I left it on for a couple minutes to see if the brightness changed or improved, maybe slightly, but not much.
I turned it off, pulled the monitor to check things out. Noticed the fuse at F101 was blown.
Discharged monitor pulled both boards & went over everything one more time. Didn't see anything that looked funky, so figured I'd try again. No picture at all this time & it blew the fuse at F101 again. Noticed also that the ceramic resistor at the top of the HV board was generating a decent amount of heat & also that the monitor was doing some humming.
I checked the monitor frame transistors for shorts, they're OK.
Any suggestions????