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Title: G07 Problems Post by: Bach730 on October 22, 2014, 11:05:24 pm Working a G07 CBO in a Pacman upright. The first chassis had half a screen (vertical deflection) despite replacing FR, flyback, vertical IC's and a full recap. Figured that it just had too many lifted solder pads or issues I am not experienced enough to repair.
Found a second used chassis. Recapped it. New flyback, HOT, X04, fused resistor 401, cement resistor, glass fuses, and horiz width coil. (Yes I made sure all my caps are in correctly at least 4 times and I've had successful recaps in the past). Pulled FR901 out of circuit and it's fine. I started with the cap kit and got no neck glow. Did all the rest and still no neck glow and get ZERO B+. Not even getting a pop when discharging the anode. I've got to be missing something. All I get is a black screen and a petty good hum from the speaker. Can anyone suggest anything that I must have missed? Solder side looks decent and no cracks that I can see. From what I've read on forums, I think I've hit the high points and then some. Thanks for any help! Sent from my iPhone using Tapatalk Title: Re: G07 Problems Post by: John's Arcade on October 23, 2014, 08:17:48 am Working a G07 CBO in a Pacman upright. The first chassis had half a screen (vertical deflection) despite replacing FR, flyback, vertical IC's and a full recap. Figured that it just had too many lifted solder pads or issues I am not experienced enough to repair. Found a second used chassis. Recapped it. New flyback, HOT, X04, fused resistor 401, cement resistor, glass fuses, and horiz width coil. (Yes I made sure all my caps are in correctly at least 4 times and I've had successful recaps in the past). Pulled FR901 out of circuit and it's fine. I started with the cap kit and got no neck glow. Did all the rest and still no neck glow and get ZERO B+. Not even getting a pop when discharging the anode. I've got to be missing something. All I get is a black screen and a petty good hum from the speaker. Can anyone suggest anything that I must have missed? Solder side looks decent and no cracks that I can see. From what I've read on forums, I think I've hit the high points and then some. Thanks for any help! Sent from my iPhone using Tapatalk Are you sure the monitor is getting AC? ALSO: http://lawnmowerman.rotheblog.com/rgvac/G07_Flowchart.jpg Title: Re: G07 Problems Post by: Bach730 on October 23, 2014, 09:30:43 am Where do I test to see if the monitor is receiving AC?
Sent from my iPhone using Tapatalk Title: Re: G07 Problems Post by: Bach730 on October 23, 2014, 09:34:52 am 901 was blown but I've replaced x01 and the flyback. Would it be worth it to replace B+ filter cap (C904) though it's uncommon? It did discharge into my finger, lol, because 901 was blown.
Sent from my iPhone using Tapatalk Title: Re: G07 Problems Post by: John's Arcade on October 23, 2014, 10:06:15 am Where do I test to see if the monitor is receiving AC? Sent from my iPhone using Tapatalk Unplug the monitor from the AC plug. It should be two wires with a molex. Black and White wires. Put your meter on the plug going to the monitor to see if you have 120V AC |