LG RT-21FB55M - Troubleshooting; No Sound Troubleshooting

TROUBLE SHOOTING
- 12 -
RF- STEREO MODEL
Selec ted c o rrec t syst em
In m enu
Chec k t he wa vef o rm
IF 1 o f TU101
Chec k t he wa vef o rm
At p in 4, 5 o f IC11
Chec k t he wa vef o rm
At p in 6 o f IC601
Chec k t he wa vef o rm
At p in 2, 4 o f IC601
Chec k t he wa vef o rm
At p in 8, 9 , 11, 1 2 o f IC6 01
Chec k t he wa vef o rm
At p in 5, 6 of IC601
Chec k / Rep lac e Q60 1
Chec k The vo ltag e
At p in of IC82 1, IC822, Q8 07
Chec k / Repla c e
C821 , IC822, Q80 7
Chec k The Vo lta ge
At p in 2, 1 9, 20, 21, 24 o f IIC1 1
Chec k / Rep lac e
TU 101
Chec k / Rep lac e
F806 , D828( D805)
OK
OK
OK
OK
OK
OK
NO
NO NO
NO
NO
NO
No Raster / So und OK (1/ 2)
Chec k t he
Hea t er vo ltag e of CPT
(6~ 6 . 4Vrm s)
Chec k
HV, Sc reen Vo lt age o f
CPT
Chec k t he
Hea ter p ulse o f FBT
T402
Chec k
R, G, B o ut o f
CPT Board
Chec k
FBT T4 02
Chec k 185V line o f CPT
Bo ard & if no p ro b lem
c hec k and Rep lac e
Chec k
IC901 , P9 03 A
Chec k
RF901, P4 02
P40 2B, FR401
Chec k
FBT T4 02
PICTURE O. K / NO SOUND