Service Manuals, User Guides, Schematic Diagrams or docs for : LG TV CI-25H40 CH[1].PC-8KA(STEREO)

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CI-25H40  CH[1].PC-8KA(STEREO)


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                                                   ADJUSTMENT
Y Safety Precautions
  1. It is safe to adjust after using insulating transformer
     between the power supply line and chassis input to                              PAL/SECAM-BG
                                                                         SYSTEM                       PAL-BG/DK          PAL-I
     prevent the risk of electric shock and protect the                                SECAM-LL'
     instrument.
  2. Never disconnect leads while the TV receiver is on.                 TUNER       6700VPF002A     6700VPF002B      6700VPF002B
  3. Don't short any portion of circuits while power is on.
                                                                       AGC Voltage     2.3 ! 0.1V      2.3 ! 0.1V      2.1 ! 0.1V
  4. The adjustment must be done by the correct appliances.
     But this is changeable in view of productivity.                  NOTE: AGC must be adjusted when the tuner was changed.
  5. Unless otherwise noted, set the line voltage to
     230Vac!10%, 50Hz.                                             : Screen Voltage Adjustment

Y Test Equipment required
  1. Multimeter (volt meter)
  2. Oscilloscope                                                      Test Point    : RK (Red Cathode of CPT Board)
                                                                       Adjust        : Screen Control of FBT


: RF AGC (Automatic Gain Control) Adjustment                          1) Tune the TV set to receive a digital pattern.
                                                                      2) Press PSM (RED) button on remote controller. (standard
   Test Point     : AGC TP (J3)                                          picture)
   Adjust         : Remote Control                                    3) Connect the probe of oscilloscope to the RK (Red
                                                                         Cathode) of CPT Board.
                                                                      4) Adjust Screen Volume of FBT so that the waveform is the
  The RF AGC was aligned at the time of manufacture for                  same as below figure.
  optimum performance over a wide range conditions.
  Readjustment of RF AGC should not be necessary unless
                                                                                                      Horizontal
  unusual local conditions exist, such as ;                                                           FlyBack Time
                                                                                                                           Black level
  1) Channel interference in a CATV system.                                                                               160Vp-p
  2) Picture bending and/or color beats, which are unusually
     due to excessive RF signal input when the receiver is too
     close to a transmitting tower or when the receiver is                                                                 White level
     connected to an antenna distribution system where the RF                         1H-LINE                              GND for dc
     signal has been amplified. In this case, the input signal
     should be attenuated (with pad or filter) to a satisfactory          The waveform of RK(Red Cathode) of CPT Board
     level.
  3) Picture noise caused by "broadcast noise" or weak signal.
     If the broadcast is "clean" and the RF signal is at least
     1mV (60dBu), the picture will be noise free in any area.      : Focus Adjustment

                                                                      NOTE: This adjustment should be performed after warming
                                                                             up for 10 minutes.
Adjustment
1. Connect RF signal (65dB) and turn on the TV.                         Test Point    : Observing Display
2. Press OK buttons on TV set and Remote Controller at the              Adjust        : Focus control of FBT
   same time to get into SVC mode.
3. Press Channel UP/DOWN button on the Remote Controller
                                                                      1) Tune the TV set to receive an inactive channel station.
   several times to find AGC.
                                                                      2) Adjust the Focus control of FBT for best overall focus.
4. Press Volume UP/DOWN button until the AGC Voltage is
   the same as the Table below.
5. Press OK(Y) button to memorize the data.




                                                              - 1 -
: Deflection Data Adjustment (Line SVC-1)

  NOTE: To enter SVC mode, press "OK" buttons on both TV set
         and the Remote control at the same time.

1. Preparation for Deflection Adjustment
  1) At SVC mode, press the Yellow colored button.
     If the Remote Controller doesn't have the Yellow button, you
     should use a Service Remote Control (105-201G) and press
     SVC button.
     And then, deflection data adjustment OSD (SVC1 mode) will
     be displayed.
  2) Press Channel UP/DOWN button for desirous function                       a
     Adjustment.
  3) Press Volume UP/DOWN button to adjust the data.
                                                                                                                                    b

2. Deflection Adjustment Procedure                                                                      
VL (Vertical Linearity) Adjust so that the boundary line between upper and lower 3. Deflection Initial Setup Data half is in accord with geometric horizontal center of the CPT. PAL 50Hz NTSC 60Hz Item VA (Vertical Amplitude) Normal Wide Zoom Normal Wide Zoom Adjust so that the circle of a digital circle pattern may be located within the effective screen of the CPT. VL 33 30 28 28 29 27 VA 31 33 30 37 33 33 SC (Vertical "S" Correction) Adjust so that all distance between each horizontal lines are SC 18 18 18 18 18 18 to be the same. VS 29 41 40 40 41 43 VS (Vertical Shift) HS 27 29 29 35 35 35 Adjust so that the horizontal center line of a digital circle pattern is in accord with geometric horizontal center of the EW 50 46 55 49 47 57 CPT. EP 42 48 48 48 48 47 HS (Horizontal Shift) EC 26 26 26 26 30 39 Adjust so that the vertical center line of a digital circle pattern is in accord with geometric vertical center of the ET 28 29 29 35 30 29 CPT. VZ 31 0 45 29 0 43 EW (Horizontal Width) Adjust to that a digital circle pattern looks like exact circle. EP (East-west Parabolar) Adjust so that middle portion of the outermost left and right : White Balance Adjustment.(LINE SVC-0) vertical line looks like parallel with vertical lines of the CPT. NOTE : This adjustment should be performed after screen voltage EC (East-west Coner) adjustment. Adjust so that the vertical line at every 4 corners of the screen looks like parallel with the vertical lines of the CPT. 1) Tune the TV set to receive an 100% white pattern. 2) Press OK(Y) buttons on TV set and remote controller at the ET (East-west Trapezium) same time to get into SVC mode. Adjust to make the length of top horizontal line same with it 3) Press PSM(RED) button on remote controller. (Standard of the bottom horizontal line. picture) 4) Press Channel UP/DOWN button for desirous function VZ (Zoom Mode, Vertical Height) adjustment. Select the zoom mode with ARC button and adjust the data 5) Adjust VOL+ or VOL- button for GG:31. until the lines a and b of figure are 5~10mm from the top 6) Adjust VOL+ or VOL-button in each status of "Rg--"/"Bg--" for and bottom of CPT and 3~5mm from each sides of CPT. X=293!8, Y=295!8 with color analyzer. 7) Press OK(Y) button to memorize the adjustment data. - 2 - ITEM DATA Table 2. OPTION 2. Function & DATA AGC 20 (*) ITEM DATA RG 41 (*) GAI 1 GG 31 (*) 5LANG 0 BG 29 (*) OPTION Data 2 CDL 6 Y-Del 10 (15, UK) DS 1 DSA 1 NOTE: "(*)" marked items must be adjusted. : LINE SVC-2 ITEM DATA FP 30 NP 118 SP 23 S1 VOL 75 S2 VOL 75 : OPTION Adjustment (SVC MODE:OPTION-1, OPTION-2) NOTE: When the EEPROM has been replaced, the Option data should be restored as the function of individual system and specification. 1) Press OK buttons on both TV set and Remote Controller at the same time to get into SVC mode. 2) Press the Yellow button several times to find OPTION-1 or OPTION-2. 3) Input the correspond OPTION data referring to Table below with the numeric buttons 0~9. Table 1. OPTION 1. Function & DATA ITEM DATA SYSTEM B+L(FRANCE), I(UK), B+D(GERMANY, NORTH/EAST EUROPE, etc.) TOP ON(GERMANY, SWISS, AUSTRIA), OFF(FRANCE, UK, NORTH/EAST EUROPE, etc.) OPTION Data 8(FRANCE), 11(UK), 13(GERMANY), 9(NORTH/EAST EUROPE, etc.) - 3 - : CH(EEPROM) Data Germany No. CH. FREQ. Pattern Sound 1 EU-05 175.25 Digital ST 2 EU-04 62.25 Digital DUAL 3 EU-31 551.25 4 EU-51 711.25 5 EU-25 503.25 Color BAR N/ST, TXT 6 EU-50 703.25 Digital ST 7 EU-52 719.25 Color BAR N/ST, TXT 9 R-05 93.25 Digital SECAM D/K 10 R-34 575.25 Digital SECAM D/K France No. CH. FREQ. Pattern Sound 1 SL-45 663.25 2 SL-B 55.75 Cross Hatch TXT 3 SL-04 200.00 4 EU-05 175.25 Digital ST 5 EU-04 62.25 Digital DUAL 6 EU-31 551.25 7 EU-51 711.25 8 SL-23 487.25 Color BAR 9 SL-03 192.00 Digital N/DUAL 10 EU-52 719.25 Color BAR N/ST, TXT UK No. CH. FREQ. Pattern Sound 1 PI-41 631.25 Digital N/DUAL 2 PI-21 471.25 3 PI-69 855.25 4 PI-63 807.25 Digital N/DUAL North/East Europe etc. No. CH. FREQ. Pattern Sound 1 EU-05 175.25 Digital ST 2 EU-04 62.25 Digital DUAL 3 EU-31 551.25 4 EU-51 711.25 5 EU-25 503.25 Color BAR N/ST, TXT 6 EU-50 703.25 Digital ST 7 EU-52 719.25 Color BAR N/ST, TXT 8 R-05 93.25 Digital SECAM D/K 9 R-34 575.25 Digital SECAM D/K - 4 -



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