LG MT-40PA10S Service Manual page 10

* If any model don t have SECAM-L/L System, you should not
operate adjustment of VR101.
* Output of Power Supply = DC 5V
* Oscilloscope range = set 0.5V/div., 5msec/Div.(using scope)
V Multimeter or Oscilloscope
ST-BY 5V:P001
5V TP112(IF VCC) R144
TP103
Power-
X106
Supply
5V
(VCO)
4.7 Kohm
VR122
S3
Q122
TP111
S2
100 ohm
6-2. Adjustment 38.9MHz IF(B/G, D/K, I, L, M)
(1) Input the signal of the signal generater(38.9MHz) to
TP105(IC102 pin 7) through 0.01uF(103) capacitor.
(2) S1 : OFF, S2 : IN, S3 : OFF
(3) Adjust voltage of the TP103 to 2.5
X106.
6-3 Adjustment L VCO(Adjustment
SECAM-L ) --> Only SECAM L model
(1) After changing the signal of the signal generater to
34.25MHz, input the signal to TP102(IC102 pin 11) through
0.01uF(103) capacitor.
(2) S1 : on, S2 : off, S3 : ON
(3) Adjust voltage of the TP103 to 2.5
VR101.
7. Adjustment AGC
7-1 Preparation for Adjustment
(1) Connect the signal of PAL-B/G 05ch. to Antenna jack.
(2) Connect Multi meter to point(J150) of AGC adjustment.
7-2 Adjustment
Adjustment the voltage of Multi meter to 2.3
changing VR102.
8. OPTION TABLE
8-1 Funtion of Line Service
(1) • Enter to SVC mode by using SVC button on the remote
control.
•To enter to the SVC mode,press the "OK" button on RT-
BA10 local key ond "OK" button on the remote control
simultaneously.
• In MT-BA10 only,press the "INPUT" button and "OK" button
on remote control to enter to SVC mode.
(2) Select the item by using the Quick View(Yellow) button.
(3) After adjusting,restore adjusted item in EEPROM by using
"OK" button and use the CYAN button to cancel the
adjusted condition.
(4) Select the program directly and input the data of option by
using the number button.
1
IC102
TDA4474
0.01uF
24
TP105
7
38.9MHz
34.25MHz
11 TP102
VR102(AGC)
13
TP110
15
16
100 ohm
S1
(STB MAIN)
0.1V by adjusting
0.1V by adjusting
(5) Line SVC-0(Hitrun&W/B Adj.mode)=> VSC EEPROM
• H/T RUN:OFF,WHITE,RED,GREEN,BLUE,OFF
• A/C SRT:Auto Cutoff
• R/G/B Fine 16,R/G/B Gain 3,R/G/B Cutoff 100
(6) Line SVC-1(Phase&Position Adj.mode)=> VSC EEPROM
• Phase 15,H-Pos 32,V-Pos 32,Auto Position
(7) VSC CXA2101 Adj.mode)=> VSC EEPROM
BC 7
RC 7
(B/G,D/K,I,L)
(SECAM-L')
RG 10
GG 10
BG 10
SUB-CON 3
SUB-BRI 54
(8) STB CXA2101 Adj.mode)=> STB EEPROM
BC 7
RC 7
RG 31
GG 31
BG 31
SUB-CON 3
SUB-BRI 54
(9) SOUND Adj.mode => VSC EEPROM
FP
NP
SP
SC VOL
0.1V by
STB VOL
(10) Option 1 Adj.mode => VSC EEPROM
• Select it directly by using Teletext Size button.
System
Aus/China
ACMS
TOP
A2MONO
TXT LAN
Language
- 10 -
SUB-COL 0 GYB 5
SUB-HUE 14 GMM 5
SUB-SHP 3 BLK 15
CTI 0 PRE 1
RYR 6 DCT 1
GYR 10 DPI 2
RYB 9 VTC 3
HWI 1
SUB-COL 0 GYB 5
SUB-HUE 7 GMM 0
SUB-SHP 0 BLK 15
CTI 0 PRE 1
RYR 6 DCT 0
GYR 10 DPI 0
RYB 9 VTC 3
HWI 1
14
80
25
83
118
2 0:BG/I/DK 1:BG/I/DK/L 2:BG/I/DK/M
0 0:CCIR BG/OIRT DK
1:Australia BB/China DK
1 0:
1:Channel Name Labeling
0 0:TOP=>SIMPLE
1:TOP
0 0:Sound treatment normally
1:Don't recognize the Stereo(NICAM
treatment normally) => A part of AFRICA
6
0:E only,1:EU5,2:NON,3:China,4:Arabic
6
5:Parsi,6:All
DCO 1
HDT 0
SFO 1
DCO 0
HDT 0
SFO 1
CON 25
BRI 31
COL 31
HUE 31
SHP 31