LG 21FK2RG, Service Manual

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VIDEO/MICOM 12500
TUNER / IF 11100 HORZ. DEFL 14400
SOUND 13100 VERT. DEFL 15300
SMPS
Secondary
18200
SMPS Primary 18100
CPT
16100
11100 TUNER
TUNER INPUT SECTION
5V(ZD102,C108,C106)
30V(C103,C107,ZD103,R150)
TUNER Not Working
TU SEARCH Problem
TUNING Problem
CONTROL SECTION
SDA(R514)
SCL(R516)
TUNER Not Working
TU SEARCH Problem
TU Weak Picture Signal
MOD. CONTROL SECTION
AGC(C110,R151,J108,R109
,R154,R108)
TV system Detection Problem
TV MODE Weak Picture Signal
VIDEO/SOUND BUFFER
IF(Z111,C101,R100)
No Video Signal No Sound Signal
Video S/N Problem Sound S/N Problem
Video Noise·No Sound Noise
11101 11102 11103
11104
TUNER/IF
(TU101)
6
11100
9
4
5 1
11
8
3
2 7 10
• R404,R512,R532,C512,C513
• C515,C516,C517,C523,C544
R501,R504,C502,C506,C507
R622,R621
SET Maneuver defectiveness
KEY Not Working No Sound
R22,C15
RESET SECTION
SET Maneuver
defectiveness
MENU Picture Error
SET LATCH-UP
POWER
ST-5V(C521,R528)
RGB 9V(C510,C511,R515)
IF VCC(C528,C526,L528,C547)
VCC(C518,L503)
POWER SUPPLY SECTION
1 CHIP IC (IC501)
LV762XX
61 ~ 64
31,32
1~13
12
41
17~22
12500 VIDEO/MICOM
46~49
TUNER
NO CH. SEARCH
NO PICTURE
NO SOUND.
X501,
R537
OSC SECTION (4.43MHz)
SET Maneuver
defectiveness
Clock Error
OSD Not Working
MENU Picture Error
L IN: L221,C215
R IN: L222,C222
IN: L225,R226
IN: C210,C211,C212
IN: L221,C215
IN: L222,C222
REAR A/V DVD
AUDIO/VIDEO No I/P, O/P
04,09,35,4
9,62
50~64
35,36,40
11100
12500
12502
12503
12504
12505
12510
12509
PA01,R82,C30,C28,
R/C RECEIVER
In case of influx NOISE
R/C is not operate
LD11,R58,R60,R72,Q10
LED O/P Section
SW11~SW16
R16,R17,R18,R19,R20,R66
KEY I/P Section
KEY Error
12511
R/G/B DRIVE Section
R505~R510, C510
C510,C511,R515
DEFLECTION SECTION
Deflection Problem
Vertical/Horizontal Line
NO PICTURE
SOUND Section
NO SOUND
12506
12507
12508
AUDIO L/R
VIDEO
DVD-Y,Pb,Pr
DVD-R
DVD-L
R154,C101,Z111
1. TV FUNCTIONAL
2. TU / IF SECTION
3. VIDEO PROCESSING
TROUBLE SHOOTING
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