Trouble Shooting - LG RT-21FA35R Service Manual

Selec t ed c o rrec t syst em
In m enu
OK
Chec k t he wavef o rm
IF 1 o f TU101
OK
Chec k t he wavef o rm
At p in 4, 5 o f IC11
OK
Chec k t he wavef o rm
At p in 2, 4 o f IC601
OK
Chec k t he wavef o rm
At p in 6 o f IC60 1
OK
Chec k t he wavef o rm
At p in 8, 9, 1 1, 12 o f IC601
OK
Chec k t he wavef o rm
At p in 5, 6 o f IC601
Chec k
HV, Sc reen Vo lt ag e o f
CPT
Chec k Chec k 185V line o f CPT
FBT T4 02 Bo ard & if no p ro b lem
c hec k and Rep lac e

TROUBLE SHOOTING

RF- STEREO
PICTURE O. K / NO SOUND
NO
Chec k / Rep lac e
TU 101
NO
Chec k The Vo lt ag e
At p in 2, 19 , 20, 2 1, 24 o f IIC11
NO
Chec k / Rep lac e Q60 1
NO
Chec k / Rep lac e
F80 6, D8 28( D805)
No Rast er / So und OK ( 1/ 2)
Chec k t he
Heat er vo lt ag e o f CPT
( 6 ~ 6. 4 Vrm s)
Chec k
R, G, B o ut o f
CPT Bo ard
Chec k
IC901 , P903 A
- 12 -
MODEL
NO
Chec k The vo lt ag e
At p in o f IC82 1, IC8 22, Q807
Chec k / Rep la c e
C821, IC822, Q80 7
Chec k
RF901 , P4 02
P4 02B, FR401
NO
Chec k t he
Heat er p ulse o f FBT
T402
Chec k
FBT T402