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Internal Use Only
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COLOR TV tu2522 MANUAL tu2522 SERVICE
CHASSIS : CW91A
MODEL : 29FU1RL/RG MODEL : 29FU1RL/RG-TK
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CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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P/NO : MFL62077307
May., 2010 Printed in China
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CONTENTS
Contents ...................................................................................................................2 Safety Precautions..............................................................................................3 Specifications........................................................................................................4 Adjustment Instructions .................................................................................5 T rouble Shooting.................................................................................................10 Printed circuit board.........................................................................................14 Block Diagram ......................................................................................................16 Exploded View.....................................................................................................18 SVC. Sheet..................................................................................................................
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Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
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LGE Internal Use Only
SAFETY PRECAUTIONS
IMPORT ANT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.
General Guidance
An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks.
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, etc., to be sure the set is safe to operate without damage of electrical shock.
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Leakage Current Cold Check(Antenna Cold Check)
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It will also protect the receiver and it's components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation. If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it with the specified. When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1W), keep the resistor 10mm away from PCB. Keep wires away from high voltage or high temperature parts. Due to high vacuum and large surface area of picture tube, extreme care should be used in handling the Picture Tube. Do not lift the Picture tube by it's Neck.
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With the instrument AC plug removed from AC source, connect an electrical jumper across the two AC plug prongs. Place the AC switch in the on position, connect one lead of ohm-meter to the AC plug prongs tied together and touch other ohm-meter lead in turn to each exposed metallic parts such as antenna terminals, phone jacks, etc. If the exposed metallic part has a return path to the chassis, the measured resistance should be between 1M and 5.2M. When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver is returned to the customer.
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Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet. Do not use a line Isolation Transformer during this check. Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor between a known good earth ground (Water Pipe, Conduit, etc.) and the exposed metallic parts. Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more sensitivity. Reverse plug the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS which is corresponds to 0.5mA. In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer.
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X-RAY Radiation
Warning:
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The source of X-RAY RADIATION in this TV receiver is the High Voltage Section and the Picture Tube. For continued X-RAY RADIATION protection, the replacement tube must be the same type tube as specified in the Replacement Parts List.
To determine the presence of high voltage, use an accurate high impedance HV meter. Adjust brightness, color, contrast controls to minimum. Measure the high voltage. The meter reading should indicate 23.5 ± 1.5KV: 14-19 inch, 26 ± 1.5KV: 19-21 inch, 29.0 ± 1.5KV: 25-29 inch, 30.0 ± 1.5KV: 32 inch If the meter indication is out of tolerance, immediate service and correction is required to prevent the possibility of premature component failure.
Leakage Current Hot Check circuit
AC Volt-meter
To Instrument's exposed METALLIC PARTS
0.15uF
Good Earth Ground such as WATER PIPE, CONDUIT etc.
1.5 Kohm/10W
Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
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LGE Internal Use Only
SPECIFICATIONS
Note : Specification and others are subject to change without notice for improvement.
V
Scope
This specification applies to CTV models based on chassis CW91A .
6) Power Voltage
Market Place Middle East/Africa Band LG Standard input Voltage AC110 ~240V 50/60Hz Remarks
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SPECIFIC
Testing should be done at given condition if no condition is specified 1) Ambient Temperature : 25±5°C (CST 40±5°C) 2) Ambient Humidity : 65±10% 3) Input Voltage : Standard input voltage (110~240V ac 50/60Hz) 4) All BOM mentioned component should be same quality standard as mentioned in specs./ drawing of that particular Part No. 5) Testing should be done after 20 minute heat run.
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Testing and Inspection Method
1) Performance Testing --- According to LG TV Testing Standard 2) Required Regulations
Market Place Middle East/Africa/cis Compliance Safety : CB(IEC60065) EMC : CE(EN55020,EN55013) Remarks
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General Specification
No 1
Item Receiving System
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2
Available Channel
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3 4
Input Voltage Market
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5 6 7 8 9 10
Screen Size Aspect Ratio Display Method Tuning System
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Operating Environment Storage Environment
Specification PAL BG.DK.I / NTSC M(AV3.58/4.43) PAL BG.DK.I / NTSC M(AV3.58/4.43) SECAM DK PAL NM / NTSC M(AV3.58) PAL BG,DK,I / NTSC M(AV3.58/4.43) SECAM BG,DK,L VHF : E2 ~ E12 UHF : E21 ~ E69 CATV : S1 ~ S20 HYPER : S21 ~ S41 VHF : 2~13CH(12CH) UHF : 14~69CH(56CH) CATV : 1 ~ 125CH(113CH) AC 220Vac 50/60Hz AC 110~240V 50/60Hz Latin America, China, Indonesia Philippines, Taiwan, Thai, Vietnam, Asia/Africa,CIS 29 inch Flat / Super slim 4:3 CRT FVS FS 1)Temp : 0 ~ 40 deg 2)Humidity : ~ 85 % 3)Temp : -20 ~ 60 deg 4)Humidity : ~ 90 %
Remark China / Indonesia/ Thai/ Vietnam CIS L.America/ Philippine/Taiwan Asia/Middle East/Africa
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PAL Model
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NTSC Model Asia Others
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PAL Model NTSC
Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
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LGE Internal Use Only
ADJUSTMENT INSTRUCTIONS
1. Scope of Application
These adjustment instructions are applicable to CW91A Chassis whether SET(0), SKD(0), or CKD(0). direction and adjust the Horizontal Line to fall onto the mark opening the magnet at an angle. d.Push the DY(deflection yoke) all the way to the CPT funnel. e.Turn the purity magnet(2-pole magnet) so that the "green" color portion of left side and the "blue" color portion on the right side have equal amount of color.
G R B G R B
2. Notes
2.1 Because this is a cold chassis, it is not necessary to use an isolation transformer. However,operating it using a transformer between the power supply line and chassis input to prevent electric shock and to protect the test instrument. 2.2 All adjustments must be done in correct sequence. However, for better productivity, it can be changed in a prepermitted range. 2.3 Environment conditions: If not specified, it must be done in following conditions. 1) Temperature: 25°C ±5°C 2) Humidity : 65%±10% 2.4 Power supply of SET 1) NTSC Latin America/Philippines Market:100~240V ±10%,50/60Hz Korea Market : 220V ±10%,60Hz Taiwan Market : 110V ±10%,60Hz Japan Market : 100V ±10%,50/60Hz 2) PAL/SECAM China/Indonesia/Thailand/Vietnam/CIS Market : 100~240V ±10%, 50/60Hz 2.5 If not specified, the receiver must be operated for more than 20 minutes prior to the adjustment. 2.6 Signal: Received the standard color signal. (65dB±1dBuV) NTSC: LG standard signal means the digital pattern 13CH(480NC). PAL/SECAM: LG standard signal means the digital pattern PAL-B/Gz 05CH 2.7 If not specified, APC ON is APC CLEAR (DYNAMIC).
f.Pull the DY slowly backward and fix it when the whole screen becomes red. (The specified torque for fixing DY screw should be 10Kg/cm.)
G R B R
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3. 522 Adjustment content tu2522
3.1. Screen Voltage Adjustment
3.1.1.Adjustment (Use factory remote control) (1) Input in the 75 cable LG standard signal (Digital Pattern,480NC) (2) Press IN-START KEY and ADJ KEY of SVC T/X generate horizontal line for Screen adjust. (3).Turn the screen volume on the FBT clockwise until the horizontal line is visible and turn it counterclockwise until horizontal line faintly visible. (Exit screen voltage adjustment by press "Exit" key of SVC T/X.)
3.2.2. Convergence adjustment (1). Necessary Instrument a. Degaussing Coil b. Convergence fixing instrument(special tools) (2). Adjustment Preparation a. Operate the unit at the least 15 minutes before adjustment. b. Using degaussing coil,remove the stains on CPT & Cabinet. c. Received the Cross Hatch Pattern for Convergence (09ch). d. Let the Contrast in normal luminance level. (3). Static Convergence (STC) Adjustment a. Received the Cross Hatch Pattern for Convergence (09ch). b. Before adjusting Static Convergence(STC),adjust the focus first seeing to it that the WHITE color picture quality is sharp enough. c. Converge the RED vertical line and BLUE vertical line in unity(same line) by changing the angle between the 2 tabs of 4-pole magnet. d. Converge the RED horizontal and BLUE horizontal line unity(same line) by turning the 2 tabs of the 4-pole magnet. At this time,do not change the angle between the 2 tabs. e. Converge the R,G,B vertical line in unity(same line) by changing the angle between the 2 tabs of the 6-pole magnet. f. Converge the R,G,B horizontal line in unity(same line) by turning the 2 tabs of the 6-pole magnet. At this time, do not change the angle between the 2 tabs. (4). Dynamic Convergence (DYC) Adjustment a. Y-Axis Adjustment :Adjust convergence of Y-axis(vertical) by moving the deflection yoke(DY) left and right. b. X-axis Adjustment : Adjust convergence of X-axis(horizontal) by moving the deflection yoke(DY) up and down.
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3.3. White Balance Adjustment
3.3.1. Necessary Instrument (1). Auto white balance meter (Low/High Light Pattern generator) (2). CRT Color Analyzer, CA-100 :1 set (3). Factory Remote control 3.3.2. Adjustment preparation : Prior to this adjustment, the Screen Voltage adjustment should be finished. 3.3.3. Auto Adjustment (1). Adjust using Auto White Balance Meter. (2).Enter CPU OFF mode by press the "IN-START" &"MUTE" key of factory remote control in turn before adjustment. Exit CPU OFF mode by press the "MUTE" key of factory remote control after adjustment finished. In case there is excess RED color at screen voltage adjustment, adjust it using "Volume -(F)"Key of factory remote control until the RED color disappear. LGE Internal Use Only
3.2. Purity and Convergence Adjustment
3.2.1. Purity adjustment (1). Adjustment Preparation a. Received Red Raster Pattern for purity adjustment (51CH). b. Demagnetize the CPT and Cabinet with a degaussing coil. (2). Adjustment a. Pre-adjust the static convergence(STC) with the 4 and 6-pole magnet. b. If the horizontal Line is inline with CPT Mark,2-Pole magnet should direct 3-9 o'clock direction. c. If not,direct 2-Pole magnet handle toward 6-12 o'clock Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
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3.3.4. Manual Adjustment (1). Adjust using white balance meter and factory remote control. (2). Enter white balance adjustment mode by press "IN-START" key of factory remote control. (3). Use the CHD, CHE key to choose adjustment item. (4). Use the VOLF,VOLG Key to change item data. (5). Adjustment Procedure a. Make the picture luminance 45Ft-L by change the "CONTRAST" and "BRIGHTNESS". b. Adjust X data of high light with R DRIVE and Y data of high light with B DRIVE to have color temperature as shown below. c. Make the picture luminance 4.5Ft-L by change the "CONTRAST" and "BRIGHTNESS". d. Adjust X data of low light with R BIAS and Y data of low light with B BIAS to have color temperature as shown below. e. Repeat steps a~d until both low and high light have same reading as shown below. 3.3.5. CW91A WHITE BALANCE IIC PARAMETER (1) W/B auto adjust machine setting Table
NAME VDC IC EEPROM Algorithm
3.5. Focus Voltage Adjustment
Adjustment must be done after operating the TV set receiver sufficiently. 3.5.1. Adjustment Preparation Received the LG standard pattern (PAL :Digital Pattern,480NC,13CH, NTSC: Crosshatch pattern, Ch.09 ) and set the picture condition on "APC ON" (CLEAR) mode. 3.5.2. Adjustment Turn the focus volume on the FBT upper direction to have the best focus vertical line and horizontal line as shown below.
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MAKER
NOTE
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US 51CH
[Fig 1] Cross-Hatch Pattern(NTSC:US 51CH, PAL:C-8 CH)
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(2) White balance IIC Parameter (Address)
Program Win31_wb TWB 8A (R)_Amp Program Sub Add Start Bit Stop Bit Offset Polarity VCD Slave Eeprom_Slave (R)_Cut
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Win31_wb TWB A2 G_Amp 17 5 0 0 1 21 5 0 0 0
Speed Delay 1 G_Cut 30
3.6. SUB-BRIGHTNESS Adjustment (Do not adjust)
This adjustment must be done after the White balance Adjustment
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Win31_wb TWB Win31_wb TWB Win31_wb 20 5 0 0 1 72 2
TWB Win31_wb TWB 18 5 0 0 0 6B 2
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EPRom_S
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6A 68 2 2
3.6.1. Adjustment preparation (1).NTSC -. Received LG standard Mono scope pattern (CH14). -. Set the picture condition on "APC ON" (CLEAR) mode. (2). PAL -. Received PAL B/G 5CH pattern. -. Set the picture condition on "PSM ON" (DYNAMIC) mode.
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Speed/Plus
(3) Color coordinate Tolerance Range : Adjust within ±5 for each X,Y coordinate
ITEM
X Y Color Temperature
EU
288 295 9000
N-EU
268 273 13000
Taiwan
267 276 13000
Latin America
282 288 10000
Philippines
266 282 13000
(4) White Balance default setting data
ITEM Range Default setting data PAL LOW LIGHT BLO-R(R CUT) BLO-G(G CUT) BLO-B(B CUT) HIGH LIGHT RG(R DRIVE) GG(G DRIVE) BG(B DRIVE) 0~63 0~63 0~63 0~63 0~63 0~63 32 32 32 32 32 32 NTSC 32 32 32 32 32 32 Fixed Fixed remark
3.6.2. Adjustment (1). Press the "ADJ" key of the factory remote control twice to enter to "SUB-BRIGHTNESS" adjustment mode. (2). NTSC MODEL: Change the Sub-Brightness data by pressing the VOLF,VOLG KEY so that the number 1 in gray scale of mono scope pattern almost disappear. In the ultra slim, Do until the number "1" completely disappear. (See figure 2) (3). PAL MODEL: Change the Sub-Brightness data by pressing the VOLF,VOLG KEY so that the 1th, 2th Black Level in gray scale of PAL B/G 05CH pattern have a little bit of difference. (See figure 3)
[figure 2] MONO SCOPE Pattern signal
Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
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LGE Internal Use Only
(6) EW WIDTH (Horizontal Width) Adjust to that a digital circle pattern looks like exact circle.
1th VS 2th BLACK LEVEL have a little bit of difference. (In case of VIETNAM MODEL 2th VS 3th)
[figure 3] PAL B/G 05CH signal [Figure] NTSC Digital Pattern (US13CH)
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3.6.3. Sub-Tint Adjustment (Do not adjust) This adjustment has to be done only if the picture has bad tint otherwise, it can be omitted if the picture has good tint. (1). Received LG standard pattern signal (SMPTE, 2CH). (2). Set the picture condition on "APC ON" (CLEAR) mode. (3). Press the "ADJ" key of the factory remote control three times to enter to "SUB-TINT" adjustment mode. (4). Change the Sub-Tint data by pressing the VOLF,VOLG Key until the upper and lower CYAN color becomes same color.
[Figure] PAL Digital Pattern
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3.7. Deflection Setting Data Adjustment
These adjustment will be done by Auto Adjustment Equipment. For manual adjustment, it is also possible by the following procedure. 3.7.1. Adjustment Preparation (1) Deflection setting data adjustment can be done only with remote control. (2) Press the "INSTART" Key on the factory remote control continuously to enter to Deflection Adjustment mode. (3) Press the CHD,E Key to select adjustment item. (4) Press the VOLF,G Key to change the data. 3.7.2. Adjustment (1) V SLOPE Half of the picture (bottom part) changed to blank. Adjust so that half blanked- Picture bottom line in accord with geometric vertical center of the CPT. (2) V SHIFT (Vertical Shift) Adjust so that the horizontal center line of a digital circle pattern is in accord with geometric horizontal center of the CPT. (3) V LINEAR (Vertical Linearity) Adjust so that the boundary line between upper and lower half is in accord with eometric horizontal center of the CPT (4) V AMPLIT (Vertical Amplitude) Adjust so that the circle of a digital circle pattern may be located within the effective screen of the CPT.
(7) EW PARAB (East-west PARABOLA) Adjust so that middle portion of the outer most left and right vertical line looks like parallel with vertical lines of the CPT. (8) EW TRAPE (East-west TRAPEZOID) Adjust to make the length of top horizontal line same with it of the bottom horizontal line. (9) EW UPCOR Adjust until symmetries upper corner of the screen. (10) EW LOCOR Adjust until symmetries upper corner of the screen.
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UPCOR
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EW PARAB
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LOCOR
US 51CH
[Figure] Cross-Hatch Pattern (NTSC:US 51CH, PAL:C-8 CH)
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(11) H BOW Adjust the left and right crooked line on upper and lower side. (12) H PARALL(ANGLE) Adjust the vertical slope. (13) SCORRECT (S-CORRECTION) Adjust so that all distance between each Vertical lines are to be the same. * Pre-settled according to the CPT. (14) V SCROLL * Recommend initial setting data (15) V ZOOM (Vertical Zoom) * Pre-settled according to the CPT
3.8. Deflection setting Initial data ( SERVICE 2 )
Adjust : It is possible to adjust data. Recommend : It is recommended, if necessary it is possible to adjust. FIX : Don't change data. (5) H SHIFT (Horizontal Shift) Adjust so that the Horizontal center line of a digital circle pattern is in accord with geometric vertical center of the CPT.
Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
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LGE Internal Use Only
ITEM
V SLOPE V SHIFT V LINEAR V AMPLIT H-SHIFT EW WIDTH EW PARAB EW TRAPE
Description
Vertical slope Vertical shift Vertical linearity Vertical amplitude Horizontal shift EW width Parabola adj Trapezoid adj
29" 29" 29" TS FLAT Slim Slim (AK)
29" Slim AK2
3.9.3. Picture Setting SVC DATA3 ( SERVICE 4 )
Remarks
17 41 43 40 29 48 24 32 46 47 38 26 32 21 25 7 2 0
14 43 37 33 32 17 16 40 33 34 37 38 41 21 25 7 2 0
19 31 23 18 24 28 28 29 43 44 42 26 32 21 25 7 2 0
adj. adj. adj. adj. adj. adj. adj. adj. adj. adj. adj. adj. Recommend Recommend Recommend Recommend Recommend Recommend
ITEM
WS BKS BSD DSK COR PF RPO RPA PWLDAC IFOFF CHSE ACL BLOC TEXT-V TEXT-H VGUARD TFR GAMMA
Description
White stretch Black stretch Black stretch depth Dynamic Skin Control Coring (Peaking) Peaking center freq. & delay Ratio pre & over shoot Ratio pre & after shoot Peak white limiting IF demodulator offset Chroma sensitivity
Slim Flat
1 1 0 1 3 0 3 1 3 45 1 1 5 1 1 0 1 3 0 3 1 3 45 1 1 5 28 5 0 1 1 3
Remarks
EW UPCOR Upper corner adj EW LOCOR H BOW H PARALL Lower corner adj Horizontal Bow Horizontal parallelogram
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SCORRECT S correction V SCROLL V ZOOM WBR WBF V SYNSLI Vertical Scroll Vertical zoom
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Automatic color limiting
Black level offset control Text V position Text H position Vertical guard Black level shift
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28 5 1 1 1 3
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Timing of Wide Blanking Timing of Wide Blanking Vertical slicing level
3.9. SVC Adjustment data table
3.9.1. Picture Setting SVC DATA1 ( SERVICE 1 ) CPT
OSD Gamma correction
OSDHPOS OSD Horizontal Position
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RG GG BG
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Flat (LPDK) Slim
21 32 32 32 32 32 32 9 8 15 15 30 21 32 32
3.10. OPTION Adjustment data Table
ITEM
AGC
Description
AGC take over Red Gain Green Gain Blue Gain Black level offset Red Black level offset Green Black level offset Blue Cathode Drive Level Luminance delay time
3.10.1. Preparation for Adjustment (1) This decides function in accordance with model. Press the SVC TX adjustment button (IN-START button) at SVC mode, then adjust the option at OPTION 1, 2, 3, 4 mode. (2) Mark the option adjustment data like (0,128,65,96) in BOM. Mark of BOM
LEVEL 1.
.
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BLO-R BLO-G BLO-B CDL L-DLY
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32 32 32 9 8 15 15 30
32
PART NO. SPECIFICATION DESCRIPTION
EBT30431523 MAIN, CW91A
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JOP EXP.
CHASSIS ASSY (0,128,65,96)
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The OPTION 1 data is 90, the OPTION 2 data is 96, the OPTION 3 data is 4, the OPTION 4 data is 17 in this model. 3.10.2. Adjustment Method (1) Input data directly by the buttons corresponded with OPTION 1 ?? (0~255), OPTION 2 ?? (0~255),OPTION 3 ?? (0~255), OPTION 4 ?? (0~255). (2) Select each OPTION function by the CH UP/DOWN button and then set up each OPTION by the VOL UP/DOWN button.
RGB-BRI OSD/TEXT BRIGHTNESS SUB-BRI OSD/TEXT BRIGHTNESS
SCR-BRI OSD/TEXT BRIGHTNESS
3.9.2. Picture Setting SVC DATA1 ( SERVICE 3 )
ITEM
FMWS MONO DSG AGN BPB AVLE AMLOW BPB2 FFI
Description
FM window size FM demodulator Audio in/out gain FM Sound output gain Bypass BPF(for mono demodulator) Enable AVL on EW pin AM sound output gain Bypass second BPF Fast filter IF-PLL
PAL NTSC
Remarks
2 1 1 0 0 0 0 1 0 1 FM Prescaler(Stereo L/R)
DCXO AVL DCXO value
Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
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LGE Internal Use Only
3.10.3. OPTION1 Function
3.10.6. OPTION4 Function
OPTION CHASSIS
0 1 2 3
CODE
FUNCTION
CW91A CW91C RESERVED RESERVED 29INCH 21INCH WITHOUT PIP WITH PIP
REMARK
OPTION OSD LANG
CODE
0 1 2 3 4 5 6 7 ENGLISH
FUNCTION
ENGLISH EASTASIA RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED
REMARK
NIGERIAN RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED
INCH PIP
0 1 0 1
3.10.4. OPTION2 Function
TXT LANG
0 1
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OPTION
0 1
CODE
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FUNCTION
LOW CURVE HIGH CURVE WITHOUT DUAL SAVING WITH DUAL SAVING FM NORMAL DEMODULATION FM HIGH DEVIATION DEMOWITHOUT A2STEREO WITH A2STEREO
REMARK
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2 3 4 5 6 7
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VOL CURL DUAL HIDEV A2STEREO
0 1 0 1 0 1
TELE TEXT
0 1
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CODE FUNCTION
WITHOUT SCART WITH SCART
3.11. IN STOP Mode setting
No. 1 ITEM
Status
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OFF TV 03CH VHF: 2~13CH UHF : 14, 30. 51. 55, 63CH CATV : 15,16,17, 55, 95CH 30 STEPS Stamdard OFF OFF ON Dynamic FLAT OFF OFF OFF OFF 0 OFF OFF
REMARK
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Power Input LAST CHANNEL MEMORY CHANNEL
3.10.5. OPTION2 Function
2 3
OPTION SCART DVD SAV 4KEY EYE GAME XWAVE DEGAUSS
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
REMARK
4
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WITHOUT DVD WITH DVD WITHOUT SIDE A/V WITH SIDE A/V 6KEY 4KEY WITHOUT EYE WITH EYE WITHOUTGAME MODULE WITH GAME MODULE WITHOUT X-WAVE WITH X-WAVE WITHOUT DEGAUSS WITH DEGAUSS
5 6 7 8 9 10 11 12 13 14 15 16 17 18
SOUND CSM
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OPTION
MUTE TORBO SOUND XD PSM SSM BOOSTER CHILD LOCK AUTO SLEEP AVL BALANCE EYE DEGAUSS
OPTION
3.12. TV/CABLE TV CHANNEL Operation Condition
1. Necessary parts and instruments (1) Remote controller (with AIR/CABLE TV button) 2. Checking (1) Check receiver channel operation for some abnormality by pressing AIR/CABLE TV button continuously. Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
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LGE Internal Use Only
TROUBLE SHOOTING
1. RF-STEREO MODEL
1) PICTURE OK / NO SOUND
Selected correct system in menu OK NO Check the waveform IF of TU101 OK Check the waveform at pin 64,71of IC501 OK NO Check/ Replace TU101 or Input signal
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NO OK NO
Check the voltage at pin 2, 11, 18, 35, 36, 55, 61, 68, 75 of UOC-TOP QFP80
NO Check/ Replace IC501
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Check the waveform at pin 1, 64of IC601
Check the voltage at pin 25, 26 of UOC-TOP QFP80
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Check the waveform at pin 63 of IC601 OK
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NO OK
Check/ Replace Q601
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Check the waveform at pin 2, 72, 76 of IC601
Check/ Replace IC601
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Check the waveform at pin 71, 77 of IC601
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NO
Check/ Replace R822, D827
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2) No Raster / Sound OK(1/2)
Check the Heater voltage of CPT(6.0~6.4 Vrms)
Check HV, Screen voltage of CPT
Check R, G, B out of CPT board
Check the Heater pulse of FBT T402
Check FBT T402
Check 200V line of CPT Board & if no problem check and Replace
Check IC901, P403
Check FR901, P403, P902B, FR401
Check FBT T402
Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
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LGE Internal Use Only
3) No Raster (2/2)
Check the B+ at D829 cathode Normal Abnormal
Is the voltage each pin voltage of IC501
NO
OPEN Check Fuse of AC line
OK Check the in/out of regulator(IC823, IC824, IC827)
Check/ Replace Fuse
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Check/ Replace IC501
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Check Q402 collector waveform
Check pin 20 of IC501(H_Out)
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Check the voltage pin4 of IC810
Check the voltage of C832
NO
Check/ Replace DB801
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NO
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Check/ Replace Q402
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Check T401 & each pin voltage
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Check/ Replace IC810, IC802, Q830 NO
Check/ Replace Fuse and IC810
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Check/ Replace T401 Check Q401collect waveform
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Check/ Replace Q401
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OK Check & Replace T402
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Check/ Replace IC501
Check Fuse and Diode of secondary Load of SMPS trans(T801)
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Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
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LGE Internal Use Only
4) No Picture/ No Sound
Is any OSD displayed? NO OK OK Check IC501 pin 8, 7, 6 (R, G, B out) Check receiving system in MENU & execute Auto - Program OK
522
NO
tu2522 tu2522
NO NO Check IC501 pin 8, 7, 6 (R, G, B out) OK Check pin68 Reset Voltage OK
Does the auto - Program operate properly OK
tu2522 tu2522
Check SMPS Trans Secondary Voltage Go to No sound/ picture OK
tu25
Store on manual -program MENU
522
Check the waveform pin20(H-out)
tu25
522
OK
tu2522
Check pin77, 76 SCL, SDA OK Replace IC501
NO
tu2522
Check IC12(EEPROM) & SCL, SDA, Line
tu25
P20A (R, G, B out of IC501)
P20A (R, G, B out of IC501)
Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
- 12 -
LGE Internal Use Only
2. AV STEREO/ MONO MODEL
Select correct system in menu OK OK Check the connection of AV equipment
AV Does the auto - Program operate properly OK Check the waveform at pin26, 25 of IC501 OK Check the waveform at pin4, 12, of IC601 NO Check the signal line of SPK-N,P Check TU101 Tuner
522
tu2522
OK NO
tu2522
Check the voltage of pin2, 11, 18, 35, 36,55,61, 68, 75 of IC501
tu25
522
tu2522
OK Check the waveform at pin6 of IC601 OK Check the waveform at pin8, 9, 11, 12 of IC601 NO
tu2522
Check pin71 (mute) of IC501
tu25
522
tu2522
NO
Check the voltage at pin5, 7 of IC601 OK
tu2522
NO NO
Check/ Replace R822, D827
tu25
Check the connection of side AV Board P201A OK Replace IC601
Correct the Board
Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
- 13 -
LGE Internal Use Only
PRINTED CIRCUIT BOARD
MAIN
522
tu2522 tu2522 tu2522
tu2522 tu2522 tu2522
tu25
522
tu25
522
tu25
Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
- 14 -
LGE Internal Use Only
Power
CONTROL
522LED
tu2522 tu2522 tu2522
tu2522 tu2522 tu2522
tu25
522
tu25
522
tu25
Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
- 15 -
LGE Internal Use Only
522
522
522
PR+ PRVOL+ VOLOK Menu
3
AC INPUT (100~240V)
IC823 3.3V REG IC826 5V REG
13 Sound Vcc 15 40V 16 B+ 12 6.5V
ST- 5V R,G,Bout IK
IC824 ST-6V REG
11 14V
SPK R
SMPS TRANS EER4942
2 220V
9 8 2 7
RGB Amp RGB Amp TDA6107AJF TDA6107AJF
ST-3.3V
SOUND AMP LA42102N
SPK L
4
STRSTRW6556 W6556
(( ((
7
5
6
21V
5V
38V
Vscreen HV V Heater
Scart in
Comp In
Tuner
Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
S-MUTE
tu2522
(115V)
tu2522
RF ST OPT RK,GK,BK
tu2522
BLOCK DIAGRAM
- 16 H DRIVE TRANS
46 15
VER. AMP LA78141
3
4
H OUT TR 2SC6090
14V
5 200V 8 28V
-14V
FBT
EW IC
9 ABL
,IK 1.8V(RF ST) 5 ,B 1 ,G 75 6 2.5V R 8 6 56 3V 5V 3. ) V 67 8 V 55 1. .5 8V(AV ST Opt) K 1 (2 35 EY 36 IG D 18 IR EC 47 D 8V 26 t 5V 5 ou A 2 48 R V L, B K 21 V 71 SP 0 B S6 -F T 2 M 6 H U U TE O 49 R EY 65 F/ H E M 10 W N D E L 63 T EG L, AB R AB ou IN N t T L 24 U AV TA O 23 X2 AL V, T L, 60 XR 30 24.576Mhz 59 AV 29 R 1 28 V, PW R L, F/ A R M ST- 3.3V 3 D 64 3 N S L W T IC12 32 Vo S/ R SC 76 EEPROM W ut O ,G, 31 rY B IN SA 77 F 24C16 ,P FB 34 VI B 2 7 ,P R
45 42 41
IF
tu2522
tu2522
tu2522
KIA4558
VIF
F SI
12
IN
13
14
5V
RF ST OPT
31V
HV & HV H Comp Circuit TO DY
10 HEATER 2 B+ Collector 1
33V
SIF
SDA
Saw Filter Rear_AV(1)
( PHONE/ SCART) ( PHONE/ SCART)
SCL
Rear_AV(2)
( PHONE/SCART/DVD) ( PHONE/SCART/DVD)
LGE Internal Use Only
JK201
JK202
tu25 tu25 tu25
MEMO
522
tu2522 tu2522 tu2522
tu2522 tu2522 tu2522
tu25
522
tu25
522
tu25
Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
- 17 -
LGE Internal Use Only
EXPLODED VIEW
IMPORTANT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics.These parts are identified by in the Schematic Diagram and EXPLODED VIEW. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION,Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.
943
400
522
tu2522
913 170 150
tu2522 tu2522
174
option option
tu25
522
tu2522
112
tu25
503
570
522
504 540 331 330 320
tu2522
300 105
tu2522
501
580 520
tu25
120
590 600
530 310
Copyright©2010 LG Electronics.Inc. All right reserved. Only for training and service purposes.
- 18 -
LGE Internal Use Only
tu2522 tu2522 tu2522
tu2522 tu2522 tu2522
tu2522 tu2522 tu2522
tu2522 tu2522 tu2522
P/N:3854VA0196H
522
tu2522 tu2522 tu2522
tu2522 tu2522 tu2522
tu25
522
tu25
SVC. SHEET : 3854V A0196H-S
522
tu25