| Author |
Message |
| cory |
 Posted: Sat Mar 31, 2007 8:43 pm Post subject: |
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| 160 volts right at capacitor is too low.should be 200.you can also measure this at crt neck board.right at connector. |
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| Frank |
| Posted: Sat Mar 31, 2007 8:24 pm Post subject: |
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| You should replace most of the Electrolitic caps everywhere, get an ESR meter and check for dry caps , |
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| tgx |
| Posted: Sat Mar 31, 2007 6:25 pm Post subject: |
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| cory wrote: |
| check pins on flyback for poor solder connections.if ok there will be a capacitor near flyback for 200 volt source to crt.it will be rated at 250 volts,try changing it. |
I measured this voltage it is at 160Volts and does not drift. but thanks anyway  |
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| cory |
| Posted: Sat Mar 31, 2007 5:29 pm Post subject: |
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| check pins on flyback for poor solder connections.if ok there will be a capacitor near flyback for 200 volt source to crt.it will be rated at 250 volts,try changing it. |
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| tgx |
| Posted: Sat Mar 31, 2007 3:15 pm Post subject: Re: old tv, brightness drifting |
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| H3liax wrote: |
Hii...tgx..
I wondering if you have to check the dryjoint at the socket for TUBE/CRT,HOT,all capacitor/elco nearby the FTB ?
mybe u can do this weak things ( but some times work for me )....
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Hi H3liax I resoldered all solder joints on the power/horizontal board before, I will also try resoldering the pins at the crt "neck" board, but I don't expect this will fix my problem. |
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| H3liax |
| Posted: Sat Mar 31, 2007 2:43 pm Post subject: Re: old tv, brightness drifting |
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| tgx wrote: |
hello all, I have this very old tv ,I guess ~25 years old, but it wasn't used much. Model number is HITACHI CEP-286.
The picture is still very good and easily beats the modern cheap crap you can buy everywhere. There is a small but annoying problem with my tv, and that is after turning it on, the brightness level is very high and picture looks washed out, and after about 5 minutes the picture is perfect. I have measured many voltages (such as screen, voltage on brightness pot etc.) and none of them seems to be drifting. Do you think I can do anything to fix this, or is my tube going weak? I really don't feel like throwing this tv away, unless there is absolutely nothing I can do to fix it.
thanks! |
Hii...tgx..
I wondering if you have to check the dryjoint at the socket for TUBE/CRT,HOT,all capacitor/elco nearby the FTB ?
mybe u can do this weak things ( but some times work for me )....
e-mail : [email protected] |
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| minnie |
| Posted: Sat Mar 31, 2007 2:02 pm Post subject: |
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| Sounds like a weak tube. If the picture comes in after 5 minutes, run it till it pukes. Hitachi and Mitt's made the damn best CRT sets. 25 years gives you your answer. It was made to last, but the time has come. |
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| tgx |
| Posted: Sat Mar 31, 2007 10:19 am Post subject: old tv, brightness drifting |
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hello all, I have this very old tv ,I guess ~25 years old, but it wasn't used much. Model number is HITACHI CEP-286.
The picture is still very good and easily beats the modern cheap crap you can buy everywhere. There is a small but annoying problem with my tv, and that is after turning it on, the brightness level is very high and picture looks washed out, and after about 5 minutes the picture is perfect. I have measured many voltages (such as screen, voltage on brightness pot etc.) and none of them seems to be drifting. Do you think I can do anything to fix this, or is my tube going weak? I really don't feel like throwing this tv away, unless there is absolutely nothing I can do to fix it.
thanks! |
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