LG MT-42PZ10, Service Manual

Page: 10 / 36

* Output of Power Supply = DC 5V
* Oscilloscope range = set 0.5V/div., 5msec/Div.(using scope)
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 : ON, S3 : OFF
(3) Adjust voltage of the TP103 to 2.5
0.1V by adjusting
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
0.1V by adjusting
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 2.4 0.1V by
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 RZ-
BA10 local key ond “OK” button on the remote control
simultaneously.
• In MZ-42PZ10 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.
(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
(8) STB CXA2101 Adj.mode)=> STB EEPROM
(9) SOUND Adj.mode => VSC EEPROM
(10) Option 1 Adj.mode => VSC EEPROM
• Select it directly by using Teletext Size button.
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IC102
TDA4474
TP103
ST-BY 5V:P001
24
7
13
15
1
0.01uF
TP105
X106
(VCO)
5V
Power-
Supply
V Multimeter or Oscilloscope
TP110
38.9MHz
34.25MHz (B/G,D/K,I,L)
(SECAM-L')
100 ohm
S1
5V
4.7 Kohm
S3
Q110
VR101
16
TP112(IF VCC)
S2
TP111
100 ohm
11 TP102
VR102(AGC)
(STB MAIN)
BC 7
RC 7
RG 10
GG 10
BG 10
SUB-CON 3
SUB-BRI 54
SUB-COL 0
SUB-HUE 14
SUB-SHP 3
CTI 0
RYR 6
GYR 10
RYB 9
GYB 5
GMM 5
BLK 15
PRE 1
DCT 1
DPI 2
VTC 2
HWI 2
DCO 1
HDT 0
SFO 1
BC 7
RC 7
RG 31
GG 31
BG 31
SUB-CON 3
SUB-BRI 54
SUB-COL 0
SUB-HUE 7
SUB-SHP 0
CTI 1
RYR 6
GYR 10
RYB 9
GYB 5
GMM 0
BLK 15
PRE 1
DCT 0
DPI 0
VTC 2
HWI 2
DCO 0
HDT 0
SFO 1
CON 25
BRI 31
COL 31
HUE 31
SHP 35
FP
NP
SP
SC VOL
STB VOL
28
120
25
74
115
System
Aus/China
ACMS
TOP
A2MONO
TXT LAN
Language
1
0
1
1
0
6
1
0:BG/I/DK 1:BG/I/DK/L 2:BG/I/DK/M
0:CCIR BG/OIRT DK
1:Australia BB/China DK
0:
1:Channel Name Labeling
0:TOP=>SIMPLE
1:TOP
0:Sound treatment normally
1:Don’t recognize the Stereo(NICAM
treatment normally) => A part of AFRICA
0:E only,1:EU5,2:NON,3:China,4:Arabic
5:Parsi,6:All