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CANADA : http//biz.lgservice.com
USA : http//www.lgservice.com
: http//lgservice.com/techsup.html
COLOR TV
SERVICE MANUAL
CHASSIS : AC-02SC
MODEL : 30FZ4D
MODEL : 32FZ4D-UA
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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SAFETY PRECAUTIONS 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 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 Leaka
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TABLE OF CONTENTS DESCRIPTION OF CONTROLS...........................................4 SPECIFICATIONS.................................................................9 ADJUSTMENT INSTRUCTION...........................................10 BLOCK DIAGRAM...............................................................16 EXPLODED VIEW...............................................................20 EXPLODED VIEW PARTS LIST .........................................21 REPLACEMENT PARTS LIST................
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DESCRIPTION OF CONTROLS Front Panel Controls 3 VOL ON/OFF TV/VIDEO MENU CH 1 5 7 2 4 6 8 ON/OFF 1 Index 2 Remote control sensor 3 Standby indicator (Illuminates brightly when the TV is in 4 standby mode. Dims when the TV is switched on.) TV/VIDEO 5 6 MENU VOL left/ right 7 Volume(G G) button increases the sound level and vol- ume(F F) button decreases the sound level. 8 CH (Channel) up / down These buttons work just as they do on your remote control. - 4 -
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DESCRIPTION OF CONTROLS Rear Connections Panel Connecting external equipment to your TV. RF Connectors: Cable, Antenna Used to connect cable or antenna signals to the televi- CALIBRATION sion, either directly Digital Audio or through your CABLE ANTENNA Output Optical cable box. +75 W +75 W Connects to exter- DIGITAL AUDIO OUTPUT nal audio equip- OPTICAL ment like a home theater system. COMPONENT1 COMPONENT2 Monitor Out DIGITAL (480i/480p/720p/1080i) AUDIO INPUT Connects to a sec- Digital Au
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R S-VIDEO VIDEO IN L/MONO AUDIO DESCRIPTION OF CONTROLS Side Connections Panel There are four jacks on the lower-right front side of your TV that make connecting Audio/Video devices like video games and camcorders very simple. The jacks are like those found on the back jack connection panel. This means that most equipment that connects to those types of jacks on the rear jackpack, may be connected to the Side connection panel (FRONT VIDEO). To use the Side jacks as the signal source, select th
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DESCRIPTION OF CONTROLS Remote Control Functions in TV Mode MODE Selects the remote operating mode: TV, VCR, Cable, DVD or MODE INDICATOR Satellite. Select other operating LIGHTS modes, for the remote to oper- Show active remote mode ate external devices. every time any button is pressed. TV VCR CABLE DVD SAT TV INPUT Selects: TV and CATV. INDEX MODE INDEX POWER Switches LED Display on or off. TV INPUT TV/VIDEO COMP1 TV/VIDEO COMP1 Selects: Antenna, Cable, Video1, Selects the Component 1 COMP2 H
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DESCRIPTION OF CONTROLS Remote Control Functions in TV Mode TV VCR CABLE DVD SAT MODE INDEX POWER COMP2 POWER Selects the Component 2 input Turns your TV or any other source. TV INPUT TV/VIDEO COMP1 programmed equipment on or off, depending on mode. FRONT COMP2 HDMI HDMI FRONT Selects the HDMI input source. Selects the front video input source. 1 2 3 NUMBER KEYPAD For direct channel selection and 4 5 6 programming functions. 7 8 9 DASH(-) Is used to enter a program DASH(-) FLASHBK FLASHBK 0 num
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SPECIFICATIONS Product Specifications Model 32FZ4D-UA Horizontal Size (inches) 37.17 Height (inches) 21.77 Thickness (inches) 23.66 Weight (pounds) 125.7 Power requirement AC 120V~ 60Hz Television system American TV Standard, NTSC, ATSC with STB Television Channel VHF: 2 - 13 UHF: 14 - 69 CATV: 1 - 135 CADTV: 1 - 135 Power consumption (W) 210W Antenna 75 ohm external terminal for VHF/UHF Audio Output (W) 7W x 2 Supplied accessories Remote control, batteries 2 size AA (Alkaline battery) Screen As
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ADJUSTMENT INSTRUCTIONS 4-2. Adjustment 1. Application Object (1) Select EZ Adjust 3. CUT-OFF, by pressing the ADJ key on These instructions are applied to the AC-02SA/C chassis. the SVC Remote control. When it enters to adjustment mode, the pattern from a signal generator is being selected, it becomes with Normal image 16:9 and the CUT-OFF DRIVE data setting 31. 2. Notes (2) Connect the oscilloscope ground lead to GND on the CPT (1) Because this is not a hot chassis, it is not necessary to us
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ADJUSTMENT INSTRUCTIONS 5-4. Raster H-center(H.CENTER) Adjustment 7. White Balance Adjustment Select 77. H Postion in the adjustment mode and adjust until Perform the screen adjustment first. left and right screen are symmetrically equal. Color Temp must be adjusted from Medium Mode. (The image condition must be adjusted from Normal condition) 5-5. Horizontal Deflection Size Adjustment Manual adjustment is also possible by the following sequence. (1) Reduce 66 H-Size to verify screen protection
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ADJUSTMENT INSTRUCTIONS (1) Select EZ Adjust 5. Sub Bright pressing ADJ key on the SVC Remote control. (2) Adjust to the point where “2” is not visible. 8-2. Sub COLOR, TINT Adjustment WHITE YELLOW CYAN GREENMAGENTA RED BLUE 1 3 3' B 1' BK M BK C BK W (1) Select EZ Adjust 6. Sub Tint, Color pressing ADJ key on the SVC Remote control. (2) Select SUB COLOR and adjust the 1 and 1’ portion not to be classified. (3) Select SUB TINT and adjust the 3 and 3’ portion not to be classified. - 12 -
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PURITY & CONVERGENCE ADJUSTMENT 5. Reconnect the internal degaussing coil. Caution: Convergence and Purity have been factory aligned. Do not 6. Position the beam bender locking rings at the 9 o'clock attempt to tamper with these alignments. position and the other three pairs of tabs (2,4 and 6 pole However, the effects of adjacent receiver components, or magnets) at the 12 o'clock position. replacement of picture tube or deflection yoke may require the readjustment of purity and convergence. DEF
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PURITY & CONVERGENCE ADJUSTMENT 1.ADJUST YOKE Z-AXIS FIRST 2 .ADJUST BEAM BENDER 2 POLE TO GET EQUAL BLUE MAGNET TO GET FOUR EQUAL COLOR CIRCLES COLOR CIRCLES MAGNETS RED RED 8. Referring to above, perform the following two steps: 5. Restore the screen by removing the horizontal line. a. Adjust the yoke Z-axis to obtain equal blue circles. b. Adjust the appropriate beam bender tabs to obtain correct 6. Reconnect the internal degaussing coil and apply AC power. purity (four equal circles). 7. Tur
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RED RED PURITY & CONVERGENCE ADJUSTMENT ROTATION DIRECTION RING MOVEMENT OF RED OF BOTH TABS PAIRS AND BLUE BEAMS B B OR OPPOSITE R R 4 POLE SAME B R OR B R B B OR OPPOSITE R R 6 POLE OR SAME R B R B UP/DOWN ROCKING OF THE YOKE CAUSES LEFT/RIGHT ROCKING OF THE YOKE UP/DOWN ROCKING OF THE YOKE LEET/RIGHT ROCKING OF THE YOKE OPPOSITE ROTATION OF RED AND BLUE CAUSES OPPOSITE SIZE CHANGE OF CAUSES OPPOSITE ROTATION OF RED CAUSES OPPOSITE SIZE CHANGE OF RASTERS THE RED AND BLUE RASTERS AND BLUE RAS
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BLOCK DIAGRAM - 16 - – – –
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BLOCK DIAGRAM - 17 -
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BLOCK DIAGRAM - 18 -
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NOTES - 19 -
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EXPLODED VIEW 943 400 912 510 170 150 503 174 112 530 550 520 560 501 300 120 570 330 580 600 700 310 - 20 -
