LG RT-21FB25RQ Service Manual page 13

Is t he vo lt ag e a t
eac h p in vo lag e o f IC11
Chec k p in 60
Of IC1 1( H Out )
NO
Chec k &
Rep lac e
IC11
Chec k Q40 2
NO
Co llec to r wavef o rm
Chec k &
Rep lac e
Q40 2
Chec k T401
NO
& eac h p in vo lta g e
Chec k &
Rep lac e
T40 1
Chec k Q40 1
NO
Co llec to r wavef o rm
Chec k &
Rep lac e
Q40 1
Chec k & Rep lac e
T402
No Ras ter ( 2/ 2)
CHECK B+
At D829 c at ho d e
No rm al
Chec k t he
In/ o ut o f
reg ulat o r
-
( IC8 21, IC822
IC82 3, IC824
Yes
IC82 5)
Yes
Yes
Yes
Ab no rm al
Chec k
Fuse o f AC line
OK
Chec k t he Vo lta g e
Of C803
OK
Chec k t he Vo lta g e
Pin 4 OF IC801
OK
Chec k / Rep lac e
IC8 01, IC802 , IC826
NO
Chec k Fuse and Dio d e o f sec o nd ary
Lo ad o f SMPS t rans( T803)
OK
Chec k / Rep lac e
IC1 1
- 13 -
Op en
Chec k / Rep lac e
Fuse
NO
Chec k / Rep lac e
DB801
NO
Chec k / Rep lac e
18~20V
Fuse IC8 01