TROUBLESHOOTING GUIDE
E-19
THE AUDIO CAN NOT
RECORD
NO
NO
YES
NO
YES
YES
IS BIAS LEVEL
AT T4001 OK ?
IS THE VOLTAGE OF
T4001 AT PIN 2 5V ?
CHECK POWER BLOCK.
IS THERE AUDIO
SIGNAL AT PIN
5 OF T4001 ?
CHECK A/C HEAD AND
CIRCUIT AROUND OF IC4001.
CHECK SNAPPING OF A WIRE IN
T4001 AND CIRCUIT AROUND IT.
NO
YES
NO
NO
YES
YES
IS THERE AUDIO
SIGNAL AT PIN 80
OF IC4001 ?
CHECK THE CIRCUIT FROM
TUNER AND AUDIO INPUT
JACK TO PIN 80 OF IC4001.
IS THERE AUDIO
SIGNAL AT PIN 97
OF IC4001 ?
CHANGE IC4001.
IS THERE AUDIO
SIGNAL AT PIN 5
OF T4001 ?
CHANGE IC4001.
CHECK LEAD WIRE OF A/C
HEAD AND CONNECTOR.
