LG PF-43A10 Service Manual page 34

3. NO PICTURE/NO SOUND (RASTER OK)
No
Check IF Board
4. NO PICTURE/NO COLOR
Does the Auto search
Yes
Is the CVBS signal of pin3
of P102A normal?
Yes
GO TO
NO PICTURE Block
NO SOUND Block
Is the CVBS signal of
pin3 of P102A normal?
Yes
Is the CVBS signal of
pin40 of IC600 normal?
Yes
Is the Y signal of
Pin7 of IC700 normal?
Yes
Is the Y signal of pin60 of
IC501 normal?
Yes
Are R-Y, B-Y signal of
Pin37,38 of IC501 normal?
Yes
Are R.G.B signal of
Pin16,17,18 of IC501 normal?
Yes
Are R.G.B signal of
Pin8,9,10 of IC200 normal?
Yes
Check CRT Boards
operation?
No
Check the voltage
33V, 5V or Tuner
OK
OK
Check the
pin3, 16, 10, 11, 13 fo IC1
- 34 -
NG
Check/Repalce
ZD101, ZD103, R112, R118
No
Check IF Board
No
Check/Replace
IC600
No
Check/Replace
IC601, IC604, IC605
No
Check/Replace
IC700
No
Check/Replace
IC500
No
Check/Replace
IC501
No
Check/Replace
IC200