Karaoke Flow(Karaoke Model Only) - Zenith DVB413 Service Manual

4. KARAOKE Flow(KARAOKE MODEL ONLY)

NO
Check pattern
Start
Insert the MIC jack
Is the MIC signal at the
IC801 pin3.
Yes
Does the MIC
signal input to the IC501
pin213.
Yes
Replace IC501
3-10
NO
Is the MIC signal at the
IC801 pin2.
NO
Is the MIC signal at the
IC801 pin3 normal?
Yes
Replace the VR801
Yes
Replace IC801
NO
Replace the mic jack