Service manual

3-9
Does the CFG signal appear at
PMC01 Pin1?
Does the PWM signal appear at IC501
Pin77?
Does 2.8V appear at PMC01?
Check the PMC01 and the Capstan
Motor Ass’y.
Does the Capstan PWM signal appear at
IC501 Pin77?
Are the foil patterns and Components
between IC501 Pin77 and PMC01
Pin9 shorted?
Does the CFG signal come into IC501
Pin87?
Are the foil patterns and Components
between IC501 Pin77 and PMC01
Pin9 shorted?
2. SERVO CIRCUIT
(3) When the Capstan Motor doesn’t run,
NO
NO
NO
YES
YES
YES
When the Capstan Motor doesn’t run,
Does 12VA appear at PMC01?
YES
Replace IC501.
YES
NO
NO
YES
Refer to “SMPS(CAPSTAN/12Volt)
Trouble Shooting”.
Are the foil patterns and component
between IC501 Pin87 and PMC01
Pin1 shorted?
Check the Capstan Motor Ass’y.
NO
VCR ELECTRICAL TROUBLESHOOTING GUIDE