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Check +B voltage
abnormal
Check pin 20 voltage in
CPU
oV
Check every voltage
in CPU
Check 300V between
C1650
Check N801 Parts connected
No raster
5V
Check R505
Check R、G、B signal of N201
Check N501 and external circuit
26a
normal
Check heater voltage and video
amf. voltage
no
Check V403 T444
Check V402
Check pin40 in N201
output
yes
Check CRT cathode
voltage
abnormal
Replace CRT
normal
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