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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc.

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Old 24th Jul 2020, 11:27 pm   #1
WDeranged
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Default Sony KV14-T1U - Red flash and then cuts out

Hi. I've got a Sony KV14-T1U. It's a nice little screen but I think it's going to die on me. Very often the screen will scramble with a red flash and then cut out, the power led will start flashing.

I also notice it's really prone to blooming.

Anyone know what I'm up against?
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Old 25th Jul 2020, 1:40 am   #2
Maarten
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Default Re: Sony KV14-T1U - Red flash and then cuts out

Low cathode driver supply voltage (duff electrolytic), low G2 voltage, defective tube to name a few possibilities that come to mind.
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Old 25th Jul 2020, 5:04 am   #3
toshiba tony
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Default Re: Sony KV14-T1U - Red flash and then cuts out

These were prone to h\k shorts. Sorry to be short and brief but it's a possibility.
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Old 25th Jul 2020, 12:31 pm   #4
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Default Re: Sony KV14-T1U - Red flash and then cuts out

Could be but it's certainly worth checking the output transistors on the CRT base for dry joints.
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Old 25th Jul 2020, 1:25 pm   #5
WDeranged
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Default Re: Sony KV14-T1U - Red flash and then cuts out

Thanks for the replies. I'm competent with a soldering iron and I can handle the safety aspects so I can at least check for dry joints and failing caps. Anything beyond that is above my pay grade.
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