Panasonic UF-5500 Service Manual page 185

TRA (-)
TRA (-) BIAS
Does the TRA CLK
signal (Pin3) turn ON/OFF
at 5.425kHz?
YES
Does pin14 of IC1
output signal?
YES
Is about 60kHz sine
wave observed at the
collector of Q62?
YES
Replace the Unit.
Check the connection between
NO
Main Board (Pin3 of CN505)
and HVPS unit (Pin3), and
check the Digital unit itself.
NO
Replace the IC1, and check
the peripheral parts.
NO
Replace the Q62, and check
the peripheral parts.
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UF-5500 / 4500