Toshiba 17HLV85 Service Manual page 55

THE PICTURE APPEARS, BUT
THE AUDIO DOES NOT
APPEAR. (AT RF MODE)
IS SP301 CONNECTED ?
YES
IS THERE SIGNAL ON
PINS 1 AND 4 OF
CP301 ?
NO
IS THERE SIGNAL ON
PIN 11 OF IC301 AND
IC302 ?
NO
IS THERE SIGNAL ON
PIN 67 OF IC6601 ?
NO
IS THERE SIGNAL ON
PIN 14 OF TU4401 ?
NO
CHANGE TU4401.
TROUBLESHOOTING GUIDE
NO
YES
YES
YES
YES
E-2
CONNECT SP301.
CHAGE SP301.
CHECK IC301, IC302 AND
PERIPHERAL CIRCUIT.
CHECK IC6601 AND
PERIPHERAL CIRCUIT.
CHECK IC6601 AND
PERIPHERAL CIRCUIT.