Convergence problem (by 2 users)

i have 53" hitachi rp tv. I have had to replace the stk 392-110 twice over past 3 years. I am not able to obtain a schematic so have had trouble identifying the resistors in the convergence circuit. One or more of the stk paks has gone again. need to identify resistor values and would also like to install a couple cooling fans but do not know a good switched power point to connect fans. Is someone able to provide service info ?