Recent content by discostu

I have been to Margolin's site,I bagan to loose interest after some reading, my own fault of course, I'll just have to give it another go. I'm going to replace the xy linearity pots tonight and see what happens. I think the old output transistors in the deflector stage could be responsible for...

Sure would help if I posted the Link! Man I'm getting senile. Try this... http://www.youtube.com/watch?v=t_-HiId2pbY

R602/702 are fixed resistors and it appears factory. This guy on you tube has a very similar problem with his BZ, his text and "2d" components are great (mine are ok) but his moving "3D" images are really fubar, mine aren't quite as bad but his video pretty well sums up my problems exactly...

Thanks again DarrenF and others, I have the deflection board out and its in very good shape except for the linearity pots which are the color of rust. I only have two trimmer pots so I was a little confused when I read the g05 should have four, looks like my board revision has a fixed resistor...

What do the deflection board pots do exactly? How should I go about adjusting them? Can the deflection board be removed without discharging the HV portion of the monitor (so as to prevent death)? My deflection board has small tubes installed on it, similar to some of the soviet miniture tubes...

I ran the eraser over the finger connectors early on without any results but they do look better at least. The monitor was supposed to have been recaped recently, the deflection board looks pretty good and the caps appear to be nice new Elna's but the quality of work is dubious since I have no...

Here is a picture of the test screen, it looks considerably better in the photo than the flesh. After replacing the x&y pots on the pcb things leveled out a bit but there is still some sag on the left side of the screen as well as some intermittent shakes. To think this board was supposed to...

Well its been a while but a lot has been done to my stubborn Battlezone. The abscence of an image was due to all 3 lf13201 switching ICs being bad, once replaced I had my image back. Thats the good news, the bad news is the screen is prretty much still a mess as the left side seems to droop...

Thanks for checking! I'll compare my measurements tonight. I found one of the problems was a poor connection at one of the lf13201's (switching IC in the analog section), it may be a bad socket or lousey soldering but after some twisting and tugging I now have deflector chatter, no more spot...

I was wondering what the watchdog feature was on these games, thanks for the info. I finished the lower connector last night, it had no affect as expected, also reflowed the interconnect headers and replaced the harness and a sad looking lf13201 without any affect on the video. I do have a...

I was expecting to see ac at x & y out but instead I have 12vdc. I do have a scope but I'm a novice at implementing it, when I hook both probes up to x and y out I just get a line across the screen, hooking up to either or just shows a solid 12v line. I havent yet flowed the solder joints at the...

R29 definatly burned up due to a poor connection but it was caused by my right elbow bumping the harness...please believe me, elbow hit harness then R29 turned to smoke. With that said the new resistor is doing fine and all test points on all pc boards show proper voltages. I Rung out the...

The A/RII kit has already been ordered from Bob Roberts, as has a replacement for big blue, high score saver and new 44 oin connectors are also on the way. I already replaced r29 and cleaned most of the finger connectors on the boards, re-flowed some solders and replaced the tl082 op amps on the...

I replaced some crusty op amps in the analog section of the pcb, no luck though. Got the A/R -02 working again and voltages all check out ok but I'm still not getting any signal to the monitor (red led). The scope hooked up to x & y out just shows rock solid 12 and 14vdc present but nothing...

Thanks Darren, I took the measurements late last night while cleaning the kitchen and I feel like a fool, yes the 36v..AC should be measured at both outputs from the trafo. R29 probably went up in smoke while my right elbow was massaging the connector for the PCB.I appreciate all the excellent...