Mitsubishi Electric 1786FD2 Service Manual page 53

MEA 1786FD2 CRT Monitor Service Guide
Circuit Operation Theory
7. HV Shutdown Circuit
The IC201 pin2 (XRAY) provides a voltage detector with a threshold . If the voltage at pin XRAY
exceeds this threshold (6.25v typical) the pins HDRV, BDRV, VOUT1 and VOUT2 are floating.
When anode voltage increases , the voltage at FBT (pin3) increases. the voltage at IC201 pin2 increases.
The shutdown voltage is about 28KV.
Fig 7 HV- shutdown CKT
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