LG 32HIZ22 Service Manual page 20

2-3-2. In the case of doesn't work normally at specific input mode
(1) Symptom
- The screen doesn't work normally at specific input mode (RF, AV, Component, RGB,
HDMI)
(2) Check follow
1) Check the all input model if all input display normally.
2) Check the PIP and Double Window if it display normally.(Re-Check it Swap)
(3) In case of unusual situation from RF mode
Is the Tuner normal?
Yes
Is the IC300
normal?
Yes
Is the IC800
normal?
(4) When set doesn't display normally at RF , AV mode
Is the IC300
normal?
Yes
Is the IC800
normal?
Is the Tuner Cable
connected well?
No
No
Cable inserts well.
Input voltage, IIC
Communication and HV
No
Input voltage, IIC
Communication and HV
No
Input voltage, IIC
Communication and HV
No
sync normal?
Input voltage, IIC
Communication and HV
No
sync normal?
- 20 -
No
Is the
sync normal?
Is the
sync normal?
Is the
No
Is the
No
Is normal
the Input voltage, IIC
Communication and
CVBS output?
No
Replace Tuner.
Replace IC300.
No
Replace IC800.
No
Replace IC300.
Replace IC800.