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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 MW20FN1 TV/VCR/DVD
Set will not power up. Has 162V on primary of switching transformer.
Nothing on secondary. No shorts evident in secondary. Thanks for your help. Mike. |
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#2
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Toshiba MW20FN1 TV/VCR/DVD
Mike wrote:
Set will not power up. Has 162V on primary of switching transformer. Nothing on secondary. No shorts evident in secondary. Thanks for your help. Mike. change out the buffer q 507 i belive and the zenor d 507 and the opto look for puffed caps in the deflection board , what happens is the buffer leaks and sends the b + up to 200 plus, on a 127 line caops don;t like that. |
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#3
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Toshiba MW20FN1 TV/VCR/DVD
David Naylor wrote: Mike wrote: Set will not power up. Has 162V on primary of switching transformer. Nothing on secondary. No shorts evident in secondary. Thanks for your help. Mike. change out the buffer q 507 i belive and the zenor d 507 and the opto look for puffed caps in the deflection board , what happens is the buffer leaks and sends the b + up to 200 plus, on a 127 line caops don;t like that. Unfortunately can not locate Q507 or D507. Thanks. |
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#4
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Toshiba MW20FN1 TV/VCR/DVD
Mike wrote:
David Naylor wrote: Mike wrote: Set will not power up. Has 162V on primary of switching transformer. Nothing on secondary. No shorts evident in secondary. Thanks for your help. Mike. change out the buffer q 507 i belive and the zenor d 507 and the opto look for puffed caps in the deflection board , what happens is the buffer leaks and sends the b + up to 200 plus, on a 127 line caops don;t like that. Unfortunately can not locate Q507 or D507. Thanks. Sorry about that in this model it is ic1702 q 1705 and d1703 |
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#5
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Toshiba MW20FN1 TV/VCR/DVD
David Naylor wrote:
Mike wrote: David Naylor wrote: Mike wrote: Set will not power up. Has 162V on primary of switching transformer. Nothing on secondary. No shorts evident in secondary. Thanks for your help. Mike. change out the buffer q 507 i belive and the zenor d 507 and the opto look for puffed caps in the deflection board , what happens is the buffer leaks and sends the b + up to 200 plus, on a 127 line caops don;t like that. Unfortunately can not locate Q507 or D507. Thanks. Sorry about that in this model it is ic1702 q 1705 and d1703 Hi David! Thanks a lot. Your information is very helpful. Can you provide part numbers for IC1705, Q1705 and D1703? Thanks. |
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