Sony AVD-K150B Service Manual page 21

(3) When the Capstan Motor doesn't run,
When the Capstan Motor doesn't run,
Does 12VA appear at the PMC01?
YES
Does 2.8V appear at the PMC01?
YES
Check the PMC01 and the Capstan
Motor Ass'y.
Aren't the foil patterns and Components
between IC501 Pin108 and PMC01
Pin9 short?
Does the CFG signal come into the
IC501 Pin9?
YES
Does the Capstan PWM signal appear at
the IC501 Pin108?
YES
Aren't the foil patterns and Components
between IC501 Pin108 and PMC01
Pin9 short?
AVD-K150B/K150E/K150G/K150N/K150R
NO
Refer to "SMPS(CAPSTAN/12Volt)
Trouble Shooting".
NO
Does the PWM signal appear at the
IC501 Pin108?
YES
Does the CFG signal appear at the
PMC01 Pin1?
YES
Check the Capstan Motor Ass'y.
NO
Aren't the foil patterns and component
between IC501 Pin9 and PMC01
Pin1 short?
NO
Replace the IC501.
NO
NO
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