LG RP-29FA40-M, Service Manual

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3-7
FA - SERVICING
SERVICING
ADJUSTMENT PROCEDURE
SCOPE:
After change CPT or chassis make next arrangements.
1. – Initial Upload.
Menu Register name Value
Customer Customer Contrast 0
Customer Customer Brightness 50
Factory RF Brightness 41
Factory Aux Brightness 41
Factory YUV Brightness 41
Factory Max Contrast 110
Factory Max Brightness 36
Factory Sub Contrast 6
Customer Color Temp Cool
Factory Red Cutoff 0
Factory Green Cutoff 0
Factory Blue Cutoff 0
Factory Green Gain 63
Factory Blue Gain 60
Customer Color Temp Warm
Factory Red Cutoff 0
Factory Green Cutoff 0
Factory Blue Cutoff 0
Factory Green Gain 63
Factory Blue Gain 51
G2 (SCREEN) ADJUSTMENT
a) Set Chromatics as Normal
b) Set Customer Contrast at 0
c) Set Customer Brightness at 15
d) Set any channel without RF signal
e) Push <MENU> key at remote control until it display
channel label
f) Push <9,8,7,6,QUIT> to display Horizontal Line (it
will remain by 3 minutes)
g) Turn G2 control at Sweep (FBT) in clock wise to make
noticeable the line and after turn counter clock wise
to make it lightly visible.
h) Push <QUIT> to exit
i) Set again Normal Chromatic and available channel
WHITE BALANCE ADJUSTMENT
a) Set any video source without signal (channel label
will remain)
b) Set Chromatics as
Normal
c) Set Customer Brightness at 85
d) Observe what color is most noticeable: Red, Green or
Blue
e) Push <9,8,7,6,MENU> to enter at Factory menu;
change the value “FACT MENU” (register #0) from 0
to 1 to get at all registers.
f) Charge into the Factory registers from 24 to 28 the
respective values looking into the tables of
Cool &
Warm.
Cool Color Temp values:
“x” = 0.282 +/- 0.008, “y” = 0.288 +/- 0.008, “T” =
10,000 °K +/- 1000
CPT
Response
#24 Red
Cutoff
#25 Green
Cutoff
#26 Blue
Cutoff
#27 Green
Gain
#28 Blue
Gain
Red 0 30 14 63 60
Green 30 0 21 64 60
Blue 37 38 0 62 60
WARM Color Temp values:
“x” = 0.295 +/-0.008, “y” = 0.305+/-0.008, “T” = 8,000
°K +/- 1000
CPT
Response
#24 Red
Cutoff
#25 Green
Cutoff
#26 Blue
Cutoff
#27 Green
Gain
#28 Blue
Gain
Red 0 31 14 63 53
Green 33 0 21 62 50
Blue 42 39 0 63 53
RF SUB-BRIGHTNESS ADJUSTMENT
a) Set LG 10 Step pattern.
0 1 2 3 4 5 6 7 8 9 <= Grey Scale
<= Color Bars
b) Change values of Factory registers #10 and #11 (RF &
AUX BRT respectively) to 31 and register #12 YUV
BRT to 21. Retouch register #10 to have 3
rd
step half
illuminated. Set RF and AUX equal and YUV lower
10 units.
c) Push <9,8,7,6,MENU> to enter at Factory menu;
change the value “FACT MENU” (register # 0) from 1
to 0 to disable the Factory Menu.
d) Set again Normal Chromatic and available video source
TINT ADJUSTMENT
a) Customer Tint register is fixed for all EZ pictures,
therefore Tint adjustment is not required.