Hitachi Televsion Convergence Problem?
Answer:
this set uses 2 convergence ICs the ones installed are STK392-110, Hitachi has substituted this lower current device with the
STK392-150 to replace it because it is more reliable. So order 2 of those also replace the fusable resistor EK01 located near the IC's this opens up when one or both of the IC's short so they do not damage the power supply. these are usaully green or yellow in color, techs call them pico fuses. the one in this set is a 5 amp pico fuse. You will most likely have to unplug almost all of the connectors to get the board in a posistion to where you can unsolder the convergence IC's. Locating these IC's will be very easy, they are very large black devices mounted verticaly attached to a huge heat sink. Make sure you mark EVERY plug you disconnect. the convergence sub-yoke connectors are all the same and often are not marked and if you plug them in wrong you will never get correct convergence. So mark eveything so you know where it goes. So unsolder the IC's and take a small screw driver and use the handel of the driver to tap the pins of the ICs you unsolder so you free the pins, make sure before you unsolder them to take out the screws or clips that hold IC's to the heatsink, this way when you tap on those pins the IC's will just fall out.Now get a good tube of heatsink compund, coat the backs of the new IC's liberaly and install both of them and fasten them to the heatsink sink, this way when you tip the board up to solder they will saty in place. Now reconnect everything just as you had maked them and fire the set up, you convergence should look alot better, usaully hitting the magic focus button should touch up the convergence for you. I normally do not adivse consumers to do this but hey, its your TV and if you think you can do it, go ahead...just be careful and dont rush and you should be fine.
OK well.
You need a
Soldering Iron
Solder
Wick
Heat Sink compound
Ability to read a schematic
The correct ICs to put in
Alot of patience, and about 2 hours of time.
I wouldnt recommend.
If I remember right, Hitachi has about 3 ICs sometimes 2. About with about 26pins on each IC.
Take it to a local TV Repair shop. Cost about 270-500 depending on make model and technician.
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