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Hantarex Polo 25 ticking with neck glow
retrocat:
I have a hantarex polo 25 that is ticking. searching for similar issues online, it seems like everyone with ticking has no neck glow, but i get neck glow each time it ticks. does anyone know what could cause this condition?
the monitor was working previously, with picture issues. i replaced all electrolytic capacitors, flyback, and HOT, and it looked great and ran for some time. since the ticking started, i've since replaced the voltage regulator, and following the polo flowchart, replaced the HV caps c170, c172, c174, c175, and diodes d129, d135, with no luck. i found a bad trace on one of the flyback pins as well, and have soldered a jumper wire. everything from the flowchart checks out as far as i can tell, though i don't know how to test the flyback.. reading the b+ i get ~30V and each time it ticks/neck glows it jumps up ~70V.
thanks in advance for any info or guidance, i have been working on this thing for weeks and its driving me mad :(
grantspain:
so basically the horizontal deflection is not running
desolder centre pin of the T114 and add a 40w lamp to the track of the centre pin and ground, check all voltages 145vdc b+, 26vdc, 16vdc at power supply section test points and 12v at tp10
if all correct check T114 out of circuit, then report findings
it actually sounds like a broken track somewhere as you have heaters
retrocat:
i desoldered the center HOT pin, and connected the lightbulb.
when i plugged in the chassis, the bulb lit up, but R255 got really hot and started smoking, so i unplugged it..
does this indicate anything?
grantspain:
r255 is 100 ohm metal oxide, check d142, ic103
retrocat:
this R255 is 125 ohm carbon film. i'll order the correct one.
D142 tests ok.
how can i test ic103?