Repair Item 3: The audio signal is not present in headphone Terminal.
Is the audio signal
present in "LINE OUT"
Check the circuit around IC301.
Repair Item 4: A selected track number can't be searched.
Check the pickup.
Check the FL wire connector.
Repair Item 5: "BATT" is not displayed on the LCD.
"LOW" at pin 35 of
Is the level
Check the circuit around IC601.