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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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toshiba CF2765K vertical deflection problem
howdy, I have a Toshiba TV model #CF2765K. It has sound and HV but no
vertical deflection. I have a solid blue line 1/2+ thick in the middle with thinner lines on the top 1/2 of the screen, bottom 1/2 is dark. I have replaced the vertical IC as well as C308 & C305. I verified R308. I still have the same symptoms!! Any and all help is greatly appreciated. Gary |
#2
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toshiba CF2765K vertical deflection problem
On Tue, 10 Nov 2009 13:17:35 -0500, "Gary L. Woodruff"
put finger to keyboard and composed: howdy, I have a Toshiba TV model #CF2765K. It has sound and HV but no vertical deflection. I have a solid blue line 1/2+ thick in the middle with thinner lines on the top 1/2 of the screen, bottom 1/2 is dark. I have replaced the vertical IC as well as C308 & C305. I verified R308. I still have the same symptoms!! Any and all help is greatly appreciated. Gary IIRC, some Toshiba chassis had a small electro (1uF or 2.2uF, 50V) near the jungle IC (TA8xxx ?) go bad. - Franc Zabkar -- Please remove one 'i' from my address when replying by email. |
#3
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toshiba CF2765K vertical deflection problem
howdy, The two caps I changed were 1.0uf and 220uf both near the
vertical IC AN5221. I am not familiar with the term jungle IC! Any and all help is greatly appreciated. Thanks, Gary Franc Zabkar wrote: On Tue, 10 Nov 2009 13:17:35 -0500, "Gary L. Woodruff" put finger to keyboard and composed: howdy, I have a Toshiba TV model #CF2765K. It has sound and HV but no vertical deflection. I have a solid blue line 1/2+ thick in the middle with thinner lines on the top 1/2 of the screen, bottom 1/2 is dark. I have replaced the vertical IC as well as C308 & C305. I verified R308. I still have the same symptoms!! Any and all help is greatly appreciated. Gary IIRC, some Toshiba chassis had a small electro (1uF or 2.2uF, 50V) near the jungle IC (TA8xxx ?) go bad. - Franc Zabkar |
#4
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toshiba CF2765K vertical deflection problem
On Wed, 11 Nov 2009 15:36:43 -0500, "Gary L. Woodruff"
put finger to keyboard and composed: howdy, The two caps I changed were 1.0uf and 220uf both near the vertical IC AN5221. I am not familiar with the term jungle IC! Any and all help is greatly appreciated. This thread suggests replacing C301 (1uF, 50V) as well as the two you have already changed: http://www.plcdrives.com/forum/f34/t...problem-20545/ AFAICT, the jungle IC is a TA8680N. I believe it's called a "jungle" because it's a one-chip-does-everything solution. These datasheets may help: http://www.datasheetarchive.com/pdf-...DSA-764764.pdf http://www.nteinc.com/specs/7000to7099/pdf/nte7010.pdf - Franc Zabkar -- Please remove one 'i' from my address when replying by email. |
#5
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toshiba CF2765K vertical deflection problem
Thanks all, I thought I had already verified C301, when I went to check
it again it was bad.(I had never checked it). It was the problem, Thanks again to all that replied. Gary Franc Zabkar wrote: On Wed, 11 Nov 2009 15:36:43 -0500, "Gary L. Woodruff" put finger to keyboard and composed: howdy, The two caps I changed were 1.0uf and 220uf both near the vertical IC AN5221. I am not familiar with the term jungle IC! Any and all help is greatly appreciated. This thread suggests replacing C301 (1uF, 50V) as well as the two you have already changed: http://www.plcdrives.com/forum/f34/t...problem-20545/ AFAICT, the jungle IC is a TA8680N. I believe it's called a "jungle" because it's a one-chip-does-everything solution. These datasheets may help: http://www.datasheetarchive.com/pdf-...DSA-764764.pdf http://www.nteinc.com/specs/7000to7099/pdf/nte7010.pdf - Franc Zabkar |
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