hitachi 51SWX20B intermittent minor convergence pulling apart.

[Jason D.]

Knocking on STK392-110 no result, but knocking on the metal can box
for convergence generator makes little noise lines in the picture,
also bit different results if I knock around on the signal mainboard.

Is there any known issues with 51SWX20B convergence problems?

While ago we had to replace that convergence generator box on a older
Hitachi. This convergence generator box is located under the CRTs in
middle on the "floor" of cabinet for very intermittent extreme pulling
apart at tune of 400 for this tiny box, replacing caps did not repair
this.

Cheers, Wizard

 

[Art]

Jason: Happy Thanksgiving!!
Check for poor solder connections at the inter board connectors, common
problem. Also the DCU, the item within the metal box tyo are tappin on has a
plugin connector where it plugs into the main board. Possible bad
connections there or an actual problem inthe DCU itself. The interboard
cpnnectors have been a concern, those form the main signal to the deflection
and those from the deflection onto the convergence power amp board. They are
a pain to access, requiring removal of the pc boards and a good mag glass.