SANYO VHR-H774EV
Service Manual

MECHANISM TROUBLESHOOTING GUIDE
1.Deck Mechanism
A.
No Auto Rewind operates.

YES
Is output of the end sensor �H�? �H�: 3.5V or less �L�: 0.7V �1V or less

YES

NO
Is the end sensor Vcc applied at 5V?

NO

Check the Syscon power supply.

YES
Replace the end sensor.

Is voltage at both ends of the IR LED 0.8V-1.5?

NO

Replace the LED.

YES
Is the Syscon checked?

B.
No F/R operates.

YES
Is the current mode an F/R mode?

NO

Check the assembly position of the Mode S/W.

YES NO
Does the Capstan motor rotate? Is normal voltage applied at the Vcc1 and the Vcc2 of the Capstan motor?

YES
Does the T/up and the supply reel Operate?

YES
Is the Vctl terminal voltage of the Capstan Motor applied at more than 4V?

NO

Check the Servo, Power circuit.

YES
Check the Syscon circuit.

YES
Replace the Capstan motor.

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