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Dead with tripping PSU
CTX CPS 1560LR CTX CPS 1560LR . Line output transistor dies soon after switch-on. . Too wide and E/W fault. Line transistor becomes hot.
Check IC701 (TL431), R717 (12K) and capacitor C721 (1uf 50V). If the capacitor has blown apart and the resistor burnt, check the line output transformer before replacing any components as in my monitor the transformer had literally melted at one side and a crack surrounded the transformer's middle. Obviously this transformer had developed a EHT to pin 11 short with catastrophic results. Replacement transformers are available but due to the cost it is usually more economical to scrap the monitor. [HV is present for a short while; 250V at collector if it is de-soldered, also when load is applied with a lamp]. Check downward control/PSU, add 200R to the Ub-supply to the line transformer if necessary. Check diodes and drive control transistor(s) in the width control. Overheating of the line transistor may be due to t|
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