Only For Training And Service Purposes - LG GM200 Service Manual

4. TROUBLE SHOOTING
(3) Checking PAM Control Signal
TEST POINT
Figure 4.3.3
WAVEFORM
CHECKING FLOW
Check TX_RAMP and PAM_EN
Check if there is
Any Major Difference or not Any Major Difference or not
¨ Refer to Graph 4.3.3 ¨
LGE Internal Use Only
LGE Internal Use Only
CIRCUIT
TP2
TP1
2 4 2
G N D 1 4 V L O G C I
2 3 3
G N D 1 3 V R A M P
2 2 4
G N D 1 2 T X _ E N
2 1 5
U 5 0 2
G N D 1 1 B S 1
2 0 6
G N D 1 0 B S 2
1 9 7
G N D 9 G N D 2
S M R H 0 0 0 5 2 0 1
1 8 8
G N D 8 G N D 3
1 7 9
A N T G N D 4
S K Y 7 7 5 3 1
TX_RAMP
PAM_EN
TP2
Graph 4.3.3
Similar? Similar? Similar?
Yes Yes Yes
Go to Next Step
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2 2 p
R 5 0 5 5 6 C 5 1 5
R 5 0 6 1 0 0 o h m
R 5 0 7 1 K
R 5 0 8 1 0 0 o h m
R 5 0 9 1 0 0 o h m
R 5 1 0 1 0 0 o h m
TP1
No No No
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Only for training and service purposes

P A _ B A N D ( G I P O _ 0 7 ) 0
T X _ R A M P
P A _ E N ( G I P O _ 0 6 ) 0
A N T _ S W 1 ( G I P O _ 0 6 ) 6
( G I P O _ 0 6 ) 5
A N T _ S W 2