Question about Sanyo DS31590 31" TV
Single bright horizontal line across the screen. Guessing it's the vertical deflection based on some internet research. Any possability of a service switch on this set that may be bad? Anyone happen to have a service manual for it?
If the vertical is not defective or shorted there is a possiblity of bad solder connections on the vertical ic. If connections are good and has b+ voltage to the chip replace chip which is IC 501 LA7841 or LA7845 and change c511 (decimal point 1 film capacitor)
Posted on Dec 30, 2007
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you can proceed as follow to fix it.
now your problem how to find out whether drive is there or not it is very simple even you donot have scope.
you simply touch with screw driver or meter prob at the poibt where vertical signal is input to vertical stage
if h/line is spreadindg or tries to spread then your output is ok &problem is in drive ckt.
for schematic try given site give model no &download it
hope this will help
Oct 12, 2007 | Sanyo AVM-2557 TV
Mar 08, 2007 | Sanyo DS31590 31" TV
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