Have a Mitsubishi WS-55807 with the following symptoms:
1- TV stays on. Sound is fine but there is no video on any input. I can not check for progressive scan. I can see the OSD. I have convergence problem.
3- Heat sink of convergence ICs is cold (even after replacing the ICs). I measure correct voltages on the IC pins (-24 volts and 25 volts). I don't get any convergence grid (crosshatch) following the instructions.
4- Measure 12 volts in and 9 volts out on the IC9C01 and 05. Correct voltages also at IC9C02.
5- All voltages on the standby and switched supplies are fine.
6- HOT Q5A31 voltage is 86 volts ( I thought it is supposed to be around 130 volts?)
7- IC5A01 voltage matches the schematics (95 / 95 and 110 volts). HV output transistor (Q5A51) is 261 volts.
I have also one question. How close are the resistance(or voltage) values supposed to be to the specified values found on the schematics?
Any input is greatly appreciated.
Thanks a lot Rmoeller.
