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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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RCA TV model 14F512T, ch M123SP with Vertical Deflection Problem
Hi,
I have a RCA TV model 14F512T, ch M123SP (NO Schematic) in my TV service shop with a vertical deflection problem. I replaced R409 1 ohm which was open (in -12.6 source) and I replaced the vertical IC "IC301". Note: both +12.6 and -12.6 source (measured at source) are present, but still no vertical deflection. Horizonal line is abt. 3/4 down from top of screen. When I open the -12V circuit, in effect removing -12V source, the horizontal line is a little above the middle. Yoke test revealed yoke is not shorted or open. I tested several parts around "IC301". Has anyone repaired this (or similar) model TV with this problem? Thanks in advance, Brad Before you type your password, credit card number, etc., be sure there is no active keystroke logger (spyware) in your PC. |
#2
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RCA TV model 14F512T, ch M123SP with Vertical Deflection Problem
On 3ÔÂ26ÈÕ, ÉÏÎç1ʱ22·Ö, (Brad) wrote:
Hi, I have a RCA TV model 14F512T, ch M123SP (NO Schematic) in my TV service shop with a vertical deflection problem. I replaced R409 1 ohm which was open (in -12.6 source) and I replaced the vertical IC "IC301". Note: both +12.6 and -12.6 source (measured at source) are present, but still no vertical deflection. Horizonal line is abt. 3/4 down from top of screen. When I open the -12V circuit, in effect removing -12V source, the horizontal line is a little above the middle. Yoke test revealed yoke is not shorted or open. I tested several parts around "IC301". Has anyone repaired this (or similar) model TV with this problem? Thanks in advance, Brad Before you type your password, credit card number, etc., be sure there is no active keystroke logger (spyware) in your PC. Do you want access to China's massive pool of electronic manufacturers... but lack the time to contact suppliers, negotiate contracts, arrange shipping or monitor product quality? Don't worry - Let seriouswholesale deal with all that for you. *Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD / Audio, and Computer Accessories now by visiting the online wholesale catalog at seriouswholesale. com You'll have peace of mind thanks to the seriouswholesale Quality Control, 12-month Warranty on all products, and easy secure payment by credit card through Paypal. Selling on eBay or your own online store? Send products direct from our warehouse to your customers using our unique drop-shipping service. You can profit by selling hundreds of different products, without holding any of your own inventory! Any questions you have will be answered by the seriouswholesale English-speaking customer support team... Their aim is to make your China electronics importing business easier to run than ever before. Welcome to http://www.seriouswholesale.com. seriouswholesale - Buy from the source, profit without the hassle. - 12 Months Warranty - No minimum order restrictions - Drop-shipping with no additional fee - Pay by safely by PayPal seriouswholesale Wholesale Co., Ltd.: Chinas original and best online electronics wholesaler & drop-shipper: seriouswholesale. com |
#3
Posted to sci.electronics.repair
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RCA TV model 14F512T, ch M123SP with Vertical Deflection Problem
"Brad" wrote in message ... Hi, I have a RCA TV model 14F512T, ch M123SP (NO Schematic) in my TV service shop with a vertical deflection problem. I replaced R409 1 ohm which was open (in -12.6 source) and I replaced the vertical IC "IC301". Note: both +12.6 and -12.6 source (measured at source) are present, but still no vertical deflection. Horizonal line is abt. 3/4 down from top of screen. When I open the -12V circuit, in effect removing -12V source, the horizontal line is a little above the middle. Yoke test revealed yoke is not shorted or open. I tested several parts around "IC301". Has anyone repaired this (or similar) model TV with this problem? Check electrolytic capacitors in the vertical circuit. |
#4
Posted to sci.electronics.repair
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RCA TV model 14F512T, ch M123SP with Vertical Deflection Problem
On 3ÔÂ26ÈÕ, ÉÏÎç1ʱ22·Ö, (Brad) wrote:
Hi, I have a RCA TV model 14F512T, ch M123SP (NO Schematic) in my TV service shop with a vertical deflection problem. I replaced R409 1 ohm which was open (in -12.6 source) and I replaced the vertical IC "IC301". Note: both +12.6 and -12.6 source (measured at source) are present, but still no vertical deflection. Horizonal line is abt. 3/4 down from top of screen. When I open the -12V circuit, in effect removing -12V source, the horizontal line is a little above the middle. Yoke test revealed yoke is not shorted or open. I tested several parts around "IC301". Has anyone repaired this (or similar) model TV with this problem? Thanks in advance, Brad Before you type your password, credit card number, etc., be sure there is no active keystroke logger (spyware) in your PC. Do you want access to China's massive pool of electronic manufacturers... but lack the time to contact suppliers, negotiate contracts, arrange shipping or monitor product quality? Don't worry - Let seriouswholesale deal with all that for you. *Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD / Audio, and Computer Accessories now by visiting the online wholesale catalog at seriouswholesale. com You'll have peace of mind thanks to the seriouswholesale Quality Control, 12-month Warranty on all products, and easy secure payment by credit card through Paypal. Selling on eBay or your own online store? Send products direct from our warehouse to your customers using our unique drop-shipping service. You can profit by selling hundreds of different products, without holding any of your own inventory! Any questions you have will be answered by the seriouswholesale English-speaking customer support team... Their aim is to make your China electronics importing business easier to run than ever before. Welcome to http://www.seriouswholesale.com. seriouswholesale - Buy from the source, profit without the hassle. - 12 Months Warranty - No minimum order restrictions - Drop-shipping with no additional fee - Pay by safely by PayPal seriouswholesale Wholesale Co., Ltd.: Chinas original and best online electronics wholesaler & drop-shipper: seriouswholesale. com |
#5
Posted to sci.electronics.repair
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RCA TV model 14F512T, ch M123SP with Vertical Deflection Problem
On 3ÔÂ26ÈÕ, ÉÏÎç1ʱ22·Ö, (Brad) wrote:
Hi, I have a RCA TV model 14F512T, ch M123SP (NO Schematic) in my TV service shop with a vertical deflection problem. I replaced R409 1 ohm which was open (in -12.6 source) and I replaced the vertical IC "IC301". Note: both +12.6 and -12.6 source (measured at source) are present, but still no vertical deflection. Horizonal line is abt. 3/4 down from top of screen. When I open the -12V circuit, in effect removing -12V source, the horizontal line is a little above the middle. Yoke test revealed yoke is not shorted or open. I tested several parts around "IC301". Has anyone repaired this (or similar) model TV with this problem? Thanks in advance, Brad Before you type your password, credit card number, etc., be sure there is no active keystroke logger (spyware) in your PC. Do you want access to China's massive pool of electronic manufacturers... but lack the time to contact suppliers, negotiate contracts, arrange shipping or monitor product quality? Don't worry - Let seriouswholesale deal with all that for you. *Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD / Audio, and Computer Accessories now by visiting the online wholesale catalog at seriouswholesale. com You'll have peace of mind thanks to the seriouswholesale Quality Control, 12-month Warranty on all products, and easy secure payment by credit card through Paypal. Selling on eBay or your own online store? Send products direct from our warehouse to your customers using our unique drop-shipping service. You can profit by selling hundreds of different products, without holding any of your own inventory! Any questions you have will be answered by the seriouswholesale English-speaking customer support team... Their aim is to make your China electronics importing business easier to run than ever before. Welcome to http://www.seriouswholesale.com. seriouswholesale - Buy from the source, profit without the hassle. - 12 Months Warranty - No minimum order restrictions - Drop-shipping with no additional fee - Pay by safely by PayPal seriouswholesale Wholesale Co., Ltd.: Chinas original and best online electronics wholesaler & drop-shipper: seriouswholesale. com |
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