LG 21FX5REE, Service Manual

Page: 12 / 29

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TROUBLE SHOOTING
RF- STEREO MODEL
Selec t ed c o rrec t syst em
In m enu
Chec k t he wa vef o rm
IF 1 o f TU1 0 1
Chec k t he wa vef o rm
At p in 4 , 5 o f IC1 1
Chec k t he wa vef o rm
At p in 6 o f IC6 0 1
Chec k t he wa vef o rm
At p in 2 , 4 o f IC6 0 1
Chec k t he wa vef o rm
At p in 8 , 9 , 1 1 , 1 2 o f IC6 0 1
Chec k t he wa vef o rm
At p in 5 , 6 o f IC6 0 1
Chec k / Rep la c e Q6 0 1
Chec k The vo lt a g e
At p in o f IC8 2 1 , IC8 2 2 , Q8 0 7
Chec k / Rep la c e
C8 2 1 , IC8 2 2 , Q8 0 7
Chec k The Vo lt a g e
At p in 2 , 1 9 , 2 0 , 2 1, 2 4 o f IIC1 1
Chec k / Rep la c e
TU 1 0 1
Chec k / Rep la c e
F8 0 6 , D8 2 8 ( D8 0 5 )
OK
OK
OK
OK
OK
OK
NO
NO NO
NO
NO
NO
No Ras t er / So un d OK ( 1/ 2)
Chec k t he
Hea t er vo lt a g e o f CPT
( 6 ~ 6 . 4 Vrm s)
Chec k
HV, Sc reen Vo lt a g e o f
CPT Chec k t he
Hea t er p ulse o f FBT
T4 0 2 Chec k
R, G, B o ut o f
CPT Bo a rd
Chec k
FBT T4 0 2 Chec k 1 8 5 V line o f CPT
Bo a rd & if no p ro b lem
c hec k a nd Rep la c e Chec k
IC9 01 , P9 0 3 A Chec k
RF9 0 1 , P4 0 2
P4 0 2 B, FR4 0 1 Chec k
FBT T4 0 2
PICTURE O. K / NO SOUND