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Trying to fix a universal 25-29 china chassis (SOLVED)
perjmolsen:
--- Quote from: grantspain on January 11, 2019, 04:18:00 pm ---i would like to add that the flybacks used on these chinese clone chassis are pretty rubbish, i had a weiya clone less than a year old come in for repair with flyback bad- cheaper to buy a replacement chassis
--- End quote ---
Hi
Yes I do not either have any hopes for this repair - it is just trying to learn, and get some "universal" fault finding tips from you great guys, and kill the time waiting for my last parts to my Nano MS9-29SU repair for my scud race.
I have order the last caps in UK - i do not want to wait any longer for china ;D
princess prin prin:
--- Quote from: perjmolsen on January 12, 2019, 07:42:45 am ---Another thing...
The best monitor for this chassis - I guess that i should be one as close to the vertical and horizontal ohms reading.
Chassis:
VR: 9.6 ohm VL: 24.6mH
HR: 1.3 ohm VL: 1.5mH
I got a monitor with this reading
VR: 12.9 ohm (yellow -gold)
HR: 2.1 ohm (red-blue)
--- End quote ---
The values on the chassis label are for a common yoke type used for 25"-28" TV tubes. A Hantarex Polo has a tube with those readings.
What tube (type number) are you using?
perjmolsen:
--- Quote from: princess prin prin on January 12, 2019, 09:24:37 am ---
--- Quote from: perjmolsen on January 12, 2019, 07:42:45 am ---Another thing...
The best monitor for this chassis - I guess that i should be one as close to the vertical and horizontal ohms reading.
Chassis:
VR: 9.6 ohm VL: 24.6mH
HR: 1.3 ohm VL: 1.5mH
I got a monitor with this reading
VR: 12.9 ohm (yellow -gold)
HR: 2.1 ohm (red-blue)
--- End quote ---
The values on the chassis label are for a common yoke type used for 25"-28" TV tubes. A Hantarex Polo has a tube with those readings.
What tube (type number) are you using?
--- End quote ---
Hi
I have found an old TV and pulled it apart, to see if i could use it for testing chassis, it has the same pins at the neck, but only a 20"
I guess that i need to find a 25-29 inch real arcade monitor to use for test.
I did not want to use one of my working arcade monitors if i break something :)
princess prin prin:
Yeah, you need an A59 or A66 tube. It doesn't have to be from an arcade monitor.
perjmolsen:
--- Quote from: princess prin prin on January 12, 2019, 10:25:53 am ---Yeah, you need an A59 or A66 tube. It doesn't have to be from an arcade monitor.
--- End quote ---
OK :) Thanks
I had another old TV - pulled it apart
It had also the correct neck pins but still high reading, but a bit lower..
Tube A48 i guess..
VR: 11.2 ohm
HR: 1.9 ohm