LG RCT689H Service Manual page 31

VCR ELECTRICAL TROUBLESHOOTING GUIDE
4-2. When the C(Color) signal doesn't appear on the screen in PB Mode,
When the C(Color) signal
doesn't appear on the screen
in PB Mode,
YES
Is 5.0V
5.3VA applied to the
IC301 Pin18,24,42,55,
72,91?
YES
Does the
waveform RF signal
appear at IC301
pin79?
YES
Does the
Color signal appear at
IC301 Pin21?
YES
Replace the IC301.
NO
Check the line of the 5.0V
5.3VA Line. (Power Circuit)
NO
Replace the IC301.
Does the
NO
X301 (4.43MHz)
osxillate?
Replace the IC301.
3-12
NO
YES
Replace the X301.