TV'S

[ariston4life]

i dont suppose anyone on here knows about repairing televisions as im currently trying to fix one of my own, its a SHARP 66DS-03IR 28" C.R.T TV its stuck in standby and wont do anything else, i replaced the chopper transformer as i thought this was the problem but still no luck, can anyone help.

 

[tolivac]

Since you have replaced the "chopper transformer" you have some knowledge of electronics and how to work on those things-do you have the schematic or Sams folder for the TV?these can give you information you need to troubleshoot the set-Its been a long time since i have worked on TV's but remember in later TV's they had "HV monitoring-shutdown circuits" to monitor the operation of the sets HV section-The HV that is fed to the anode of the pix tube.If it was too high or somehow out of tolerence to the monitor circuit-the monitor circuit would shut down the HV supply when the set was turned on.I am wondering if a component in the circuit is defective-causing the set to shut down.I am assuming the "chopper transformer" is the horizontal output-HV transformer?Oh yes--Is the horizontal output transistor and its associated Damper diode good?Is the horizontal oscillator circuit working-An oscilloscope can check this.the HV monitoring circuit in the TV should be shown on the schematic or the Sams folder.(Sams folders can be gotten from most large electronic part suppliers-Bring the Model# of the set and look thru the Sams index.that will give you the folder# of your set-please note-you will get some schematics on sets that you don't have-the one on your machine is the one you will need.The last time I bought a folder was about 7 bucks)The Sams folders contain schematics,parts lists,troubleshooting info--worth the price of the folder alone!Most repairmen use Sams folders to help them fix sets.

 

[ariston4life]

every time i get close to geting it working again it blows and i think the flyback might be bad but i dont want to order a new flyback if thats not the problem.