Sanyo HV-DX300A Service Manual page 14

C. No recording
Record video signal poor.
Check EE MODE.
YES
Is luminance and color signal
output from IC301 pin#78?
YES
Is +5V supplied at IC301 pin#91?
YES
Is IC301 pin#80 REC(H) HIGH?
YES
Is VIDEO SW Pulse input at IC301
pin#70?
YES
Is REC signal output from IC301
pin#94,95,89,90?
LP MODE: 89,90 Pin
SP MODE: 94,95Pin
Check video HEAD and Connector.
NO
Is signal input into IC301
pin# 48,50,52,54,56?
NO
Check POWER circuit.
NO
Check IC501 pin#45.
NO
Check IC501 pin#18.
NO
Replace IC301.
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TROUBLESHOOTING