14-6
6. X-RAY Protection Circuit-1
Failure Diagnosis Procedures
X-ray protection circuit does
not work (when X-1 and R-1
terminals are connected.)
Check voltage at D471
cathode. (37-39V?)
Check and repair D472,
Q471, Q472 and associated
circuit.
Check and repair D862.
Check and repair D471, R472.
Check and repair around pin 5
of FBT.
OK
OK
NG
X-RAY Protection Circuit-2
Failure Diagnosis Procedures
X-ray protection circuit does
not work (when X-2 and R-2
terminals are connected.)
Check voltage at D474
cathode. (37-39V?)
Check and repair DH15, QH45,
R473, R474 and associated
circuit.
Check and repair DH14.
Check and repair D474, R469.
Check and repair around pin 6
of FBT.
NG
OK
OK
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