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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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Grundig TV MFW70-2410/7
When switched on: sound and picture appears. E/W amplitude is too
small, Focus is not correct, HOT T504 (2SC5331) runs very hot, R536 (6.8R 1W) runs very hot. The TVset switches to SBY (protection mode) after aprox 6 seconds. When reapplying power the same event happens. Running the set on a ballast lamp with HOT disconnected shows no problems, B+ however is believed to be a little low (130 VDC rather than 148 VDC) Could the HV transformer be defective ? other suspects ? TIA Bram |
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#2
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Grundig TV MFW70-2410/7
In data Sun, 25 Jun 2006 16:33:09 +0200, BRASTO ha
scritto: When switched on: sound and picture appears. E/W amplitude is too small, Focus is not correct, HOT T504 (2SC5331) runs very hot, R536 (6.8R 1W) runs very hot. The TVset switches to SBY (protection mode) after aprox 6 seconds. When reapplying power the same event happens. Running the set on a ballast lamp with HOT disconnected shows no problems, B+ however is believed to be a little low (130 VDC rather than 148 VDC) Could the HV transformer be defective ? other suspects ? Oh, maybe if you say the chassis number... TIA Bram -- Inty.Evolution - per email normali e con immagini Jpeg |
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#3
Posted to sci.electronics.repair
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Grundig TV MFW70-2410/7
In data Sun, 25 Jun 2006 16:33:09 +0200, BRASTO ha
scritto: When switched on: sound and picture appears. E/W amplitude is too small, Focus is not correct, HOT T504 (2SC5331) runs very hot, R536 (6.8R 1W) runs very hot. The TVset switches to SBY (protection mode) after aprox 6 seconds. When reapplying power the same event happens. Running the set on a ballast lamp with HOT disconnected shows no problems, B+ however is believed to be a little low (130 VDC rather than 148 VDC) Could the HV transformer be defective ? other suspects ? Hello, Beko 22.1 chassis  as you wrote in Sts Board TIA Bram -- Inty.Evolution - per email normali e con immagini Jpeg |
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