Home |
Search |
Today's Posts |
|
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. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
Toshiba TheaterView Projection TV with display problem
Our 50" set is vertically compressing the display. When it's first turned
on its compressed at the top and bottom, almost like a letter box except the top and bottom lines are squished together. As it warms up, the top returns to normal but the bottom stays compressed so that the bottom 1/6 of the screen is black. Also, their is noticeable barrel distortion. Nothing changes when switching between RF and video inputs. Any idea what could be causing this? (besides the fact that I just finished a custom cabinet to put it in?) Thanks. |
#2
|
|||
|
|||
Fault in deflection, have it diagnosed and repaired.
"dnm" wrote in message . .. Our 50" set is vertically compressing the display. When it's first turned on its compressed at the top and bottom, almost like a letter box except the top and bottom lines are squished together. As it warms up, the top returns to normal but the bottom stays compressed so that the bottom 1/6 of the screen is black. Also, their is noticeable barrel distortion. Nothing changes when switching between RF and video inputs. Any idea what could be causing this? (besides the fact that I just finished a custom cabinet to put it in?) Thanks. |
#3
|
|||
|
|||
You have a VERY PHYSICALLY SECURE faulty connection, or something
really wierd. By really secure I mean it is probably inside a coupling cap, If that set uses one for the yoke V windings the first thing I would do is at least jump it out with like a 470 or better. Make sure you got a 200V unit in your hand if you like your hand. If most of the distortion is at the top you might have a bad boost cap, if not replaced will overheat the verttical output and cause it's failure. One other possibility is the ramp cap itself. If you're a tech you will understand: check all the caps in the C3XX series, especially the ones near the jungle IC. This is of course after the soldering is over with. You might also have low B++, but to tell I would need a very well articulated description conforming to a set of questions. If not a tech, perhaps you see why we charge money ? If you're not a tech stay outta there. JURB |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Toshiba Rear Projection TV power problem | Electronics Repair | |||
Toshiba Projection TV - green ghos imaging | Electronics Repair | |||
ICs for Sale - Specials, obsolete and Memory | Electronics Repair | |||
Toshiba Projection TV Help. | Electronics Repair | |||
Toshiba Rear Projection TV convergence and power problem | Electronics Repair |