LG Flatron L222WS, Service Manual

Page 1: ...tp www LGservice com techsup html CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL L222WS L222WS SNQ BNQ AxxAQP xx sales marketing Mstar scaler CPT Module To apply the MSTAR Chip h t t p w w w w j e l n e t ...

Page 2: ... Frequency Horizontal 30 83kHz Vertical 56 75Hz 4 Max Resolution D sub Analog 1680 x 1050 60Hz 5 POWER SUPPLY 5 1 Power AC 100 240V 50 60Hz 1 0A 5 2 Power Consumption 6 ENVIRONMENT 6 1 Operating Temperature 10 C 35 C 50 F 95 F Ambient 6 2 Relative Humidity 10 80 Non condensing 6 3 MTBF 50 000 HRS with 90 Confidence Lamp Life 50 000 Hours Min 7 DIMENSIONS with TILT SWIVEL Width 501 7 mm 19 75 inchs...

Page 3: ...odule from the ESD as it may damage the electronic circuit C MOS Make certain that treatment person s body are grounded through wrist band Do not leave the module in high temperature and in areas of high humidity for a long time The module not be exposed to the direct sunlight Avoid contact with water as it may a short circuit within the module If the surface of panel become dirty please wipe it o...

Page 4: ...ound lead to the receiver chassis ground before connecting the test receiver positive lead Always remove the test receiver ground lead last 9 Use with this receiver only the test fixtures specified in this service manual CAUTION Do not connect the test fixture ground strap to any heat sink in this receiver Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged...

Page 5: ...der melts 2 Draw away the melted solder with an anti static suction type solder removal device or with solder braid before removing the IC Replacement 1 Carefully insert the replacement IC in the circuit board 2 Carefully bend each IC lead against the circuit foil pad and solder it 3 Clean the soldered areas with a small wire bristle brush It is not necessary to reapply acrylic coating to the area...

Page 6: ...ute the jumper wire along the path of the out away copper pattern and let it overlap the previously scraped end of the good copper pattern Solder the overlapped area and clip off any excess jumper wire At Other Connections Use the following technique to repair the defective copper pattern at connections other than IC Pins This technique involves the installation of a jumper wire on the component s...

Page 7: ... 875 1056 800 16 80 160 800 x 600 V Lines 75 0 625 600 1 3 21 6 H Pixels 65 0 48 363 1344 1024 24 136 160 1024 x 768 V Lines 60 0 806 768 3 6 29 7 H Pixels 78 5 60 023 1312 1024 16 96 176 1024 x 768 V Lines 75 029 800 768 1 3 28 8 H Pixels 100 0 68 681 1456 1152 32 128 144 1152 x 870 V Lines 75 062 915 870 3 3 39 9 H Pixels 108 0 63 981 1688 1280 48 112 248 1280x1024 V Lines 60 02 1066 1024 1 3 38...

Page 8: ...screws and disassemble the stand 3 Disassemble the rear cover from the bezel with a thin card There are 7 clips on the button top and 5 clips on the left right side 4 Disassemble the connector 5 Disassemble the bezel 6 Disassembly the shielding h t t p w w w w j e l n e t ...

Page 9: ... 9 7 Remove the 2 screws 8 Disassemble the LVDS cable 9 Main board power board 10 The panel h t t p w w w w j e l n e t ...

Page 10: ... Base 2 ea Latches to inside until losing elasticity 2 Synchronously take one finger to push the base 3 Consequently pull the stand body directly 4 Separate Stand Body Stand Base 5 Fix Stand Base Stand Body h t t p w w w w j e l n e t ...

Page 11: ... 11 BLOCK DIAGRAM TSUMU18BWL h t t p w w w w j e l n e t ...

Page 12: ...ircuit PWM control IC MOSFER OVP protect circuit Diode rectifier Starting resistor 12V Rush prevention ON OFF DIM Push pull circuit Transformer conversion LC resonance VDDA ON OFF circuit PWM IC OZ9938GN Feedback circuit OVP circuit 4 CCFL lamps Sampling Lamp open protection DIM circuit 12V 5V 100 240V h t t p w w w w j e l n e t ...

Page 13: ...puts 8 bit R G B signal to transmitter 2 Power Part This part consists of the one 3 3V and one 1 8V regulators to convert power which is provided 5V in Power board 12V is provided for inverter 5V is provided for LCD panel Also 5V is converted 3 3V and 1 8V by regulator Converted power is provided for IC in the main board The inverter converts from DC 12V to AC 700Vrms and operates back light lamps...

Page 14: ...ary through a power transformer 4 Output rectifier and filter This part function is to make a pulse width modulation control and to provide the driver signal to power switch to adjust the duty cycle during different AC input and output loading condition to achieve the dc output stabilized and also the over power protection is also monitor by this part 5 Photo Coupler isolation This part function i...

Page 15: ... for LCD Monitor only 1 Port Setup a Copy UserPort sys file to c WINNT system32 drivers folder b Run Userport exe c Remove all default number d Add 300 3FF e Click Start button f Click Exit button 2 EDID Read Write 1 Run WinEDID exe 2 Edit Week of Manufacture Year of Manufacture Serial Number a Input User Info Data b Click Update button c Click Write button h t t p w w w w j e l n e t ...

Page 16: ...the gain and offset value c AGING Select Aging mode on off d PANEL used panel type e NVRAM INIT EEPROM initialize f R G B 9300K Allows you to set the R G B 9300K value manually g R G B 6500K Allows you to set the R G B 6500K value manually h R G B Offset Allows you to set the R G B Offset value manually Analog Only i R G B Gain Allows you to set the R G B Gain value manually Analog Only Figure 1 C...

Page 17: ...nd make sure the AC of 100 240 is normal Measure U702 PIN2 1 8V U701 PIN2 3 3V Check the Adapter Inverter section Check CN401 or replace U702 U701 NO NO YES YES 1 NO POWER Check X201 oscillate waveforms are normal Replace U401 Replace X201 NO YES h t t p w w w w j e l n e t ...

Page 18: ... U701 PIN 3 5V Check power board and find out a short point as penning each power line 1 Check U701 2 Check C408 Check U702 PIN 2 1 8V 1 CHECK U702 2 CHECK C402 3 TROUBLE IN SCALER IC Check CN401 PIN3 4 5V 1 Check BL ON OFF pulse as contacting scope NO NO NO NO YES YES YES YES h t t p w w w w j e l n e t ...

Page 19: ... 2 Check X401 3 TROUBLE IN SCALER IC SCALER PIN96 97 OSCILLATES AS 14 318MHZ No Raster OSD Is Not Displayed SCALER IC PIN27 H SYNC PIN28 V SYNC CHECK CONNECTION LINE FROM D SUB TO SCALER TROUBLE IN CABLE OR LCD MODULE NO YES YES NO h t t p w w w w j e l n e t ...

Page 20: ... 20 4 TROUBLE IN DPM TROUBLE IN DPM SCALER IC PIN27 H SYNC PIN28 V SYNC CHECK H V SYNC LINE TROUBLE IN CABLE OR LCD MODULE NO YES h t t p w w w w j e l n e t ...

Page 21: ...age of C905 Check voltage of C901 pin7 Check the output of IC901 pin6 Check AC line Check F901 BD901 Check R909 D902 C907 C908 IC901 Check D901 L905 Q903 R914 1 Check IC901 T901 2 Check D906 D907 ZD901 ZD902 ZD903 3 Check IC902 IC903 NO YES YES NO YES NO YES NO h t t p w w w w j e l n e t ...

Page 22: ...ort time Check Q805 Q806 pin5 pin8 is 12V Check PT801 PT802 pin7 pin8 650V Check power section Check Interface section or main board Check Q801 Q802 Q803 ZD801 Check IC801 pin 5 pin6 Cut all the pin connector of Q805 Q806 check C811 12V Unplug backlight connector wire check PT801 PT802 pin7 pin8 650V Check Q801 Q802 Replace PT801 PT802 Replace backlight NO NO NO NO NO YES YES YES h t t p w w w w j...

Page 23: ... 23 WIRING DIAGRAM 089G179E30H 20 095G8014 6D 46 095G 825 7D502 h t t p w w w w j e l n e t ...

Page 24: ... 24 EXPLODED VIEW h t t p w w w w j e l n e t ...

Page 25: ...VER 080 089G421A18N IS 6410TEW003A PWRCORD BLK 6FT For Europe Thailand Vietnam Russia U A E 089G402A18NIS 6410TUW008A PWR CORD BLK 6FT For USA Mexico Panama Canada 089G410A 18N IS 6410TBW004A PWR CORD 10A 250V BLK 6FT UK for UK Malaysia 089G420A 18N IS 6410TTW001A PWR CORD BLK 6ft For Taiwan 089G412A 18N IS3 6410TSW003A PWR CORD BLK 6ft For Australia 089G419A 18N IS 6410TAW001A PWR CORD BLK 6ft Fo...

Page 26: ... MLCC 0402 0 1UF K 16V X5R C301 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C302 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C401 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C405 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C409 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C410 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C411 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C216 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C112 ...

Page 27: ...CHIP 5pF 50V NPO C108 065G0402509 31 CHIP 5pF 50V NPO C111 065G0402509 31 CHIP 5pF 50V NPO DIODEs D102 093G 64 33 DIO SIG SM BAV99 PHSE R D103 093G 64 33 DIO SIG SM BAV99 PHSE R D104 093G 64 33 DIO SIG SM BAV99 PHSE R D105 093G 64 42 P BAV70 SOT23 BY PAN JIT ZD106 093G 39GA01 T RLZ5 6B ZD105 093G 39GA01 T RLZ5 6B ZD104 093G 39GA01 T RLZ5 6B ZD103 093G 39GA01 T RLZ5 6B ZD102 093G 39GA01 T RLZ5 6B Z...

Page 28: ... 16W R406 061G0402102 RST CHIPR 1 KOHM 5 1 16W R405 061G0402103 RST CHIPR 10 KOHM 5 1 16W R403 061G0402103 RST CHIPR 10 KOHM 5 1 16W R401 061G0402103 RST CHIPR 10 KOHM 5 1 16W R301 061G0402103 RST CHIPR 10 KOHM 5 1 16W R234 061G0402103 RST CHIPR 10 KOHM 5 1 16W R232 061G0402103 RST CHIPR 10 KOHM 5 1 16W R231 061G0402103 RST CHIPR 10 KOHM 5 1 16W R230 061G0402103 RST CHIPR 10 KOHM 5 1 16W R227 061G...

Page 29: ... 16W 1 R116 061G0402750 9F RST CHIP 75 OHM 1 16W 1 R302 061G0805471 RST CHIPR 470 OHM 5 1 8W COILs FILTERs FB205 061G0805000 0 OHM 1 10W FB206 061G0805000 0 OHM 1 10W FB301 061G0805000 0 OHM 1 10W FB201 071G 56V301 B CHIP BEAD FCM2012VF 301T07 bullwill FB203 071G 56V301 B CHIP BEAD FCM2012VF 301T07 bullwill FB204 071G 56V301 B CHIP BEAD FCM2012VF 301T07 bullwill FB103 071G 59K190 B 19 OHM BEAD FB1...

Page 30: ... 065G0805104 32 CHIP 0 1U 50V X7R C913 065G0805104 32 CHIP 0 1U 50V X7R C908 065G0805104 32 CHIP 0 1U 50V X7R C904 065G0805104 32 CHIP 0 1U 50V X7R C832 065G0805104 32 CHIP 0 1U 50V X7R C829 065G0805104 32 CHIP 0 1U 50V X7R C801 065G0805104 32 CHIP 0 1U 50V X7R C802 065G0805104 32 CHIP 0 1U 50V X7R C817 065G0805104 32 CHIP 0 1U 50V X7R C821 065G0805104 32 CHIP 0 1U 50V X7R C822 065G0805104 32 CHIP...

Page 31: ...08 093G 6432S IN4148W D809 093G 6432S IN4148W D810 093G 6432S IN4148W D811 093G 6432S IN4148W D904 093G 6432S IN4148W ZD904 093G 39GA31 T ZENER DIODE RLZ18B SEMTECH ZD801 093G 39S 24 T RLZ 5 6B LLDS ZD902 093G 39S 24 T RLZ 5 6B LLDS ZD903 093G 39S 38 T PTZ 9 1B ZD901 093G 39S 40 T RLZ 13B LLDS ZD906 093G 39S 42 T RLZ27B LLDS D905 093G 5212T52T DIODE 1N4007 DO 41 D901 093G 6026W52T FR107 D902 093G ...

Page 32: ...1 10W R815 061G0805104 RST CHIP 100K 1 8W 5 R844 061G0805105 1MOHM 1 10W R840 061G0805105 1MOHM 1 10W R839 061G0805105 1MOHM 1 10W R838 061G0805105 1MOHM 1 10W R820 061G0805105 1MOHM 1 10W R816 061G0805105 1MOHM 1 10W R813 061G0805105 1MOHM 1 10W R810 061G0805105 1MOHM 1 10W R913 061G0805124 RST CHIPR 120 KOHM 5 1 8W R908 061G0805202 RST CHIP 2K 1 8W 5 R924 061G0805240 1F RST CHIPR 2 4KOHM 1 1 8W ...

Page 33: ...1G1206249 RST CHIPR 2 4 OHM 5 1 4W R928 061G1206335 RST CHIPR 3 3MOHM 5 1 4W R929 061G1206335 RST CHIPR 3 3MOHM 5 1 4W R934 061G1206335 RST CHIPR 3 3MOHM 5 1 4W R805 061G1206471 470 1206 R835 061G1206472 RST CHIPR 4 7 KOHM 5 1 4W R834 061G1206472 RST CHIPR 4 7 KOHM 5 1 4W R833 061G1206472 RST CHIPR 4 7 KOHM 5 1 4W R828 061G1206472 RST CHIPR 4 7 KOHM 5 1 4W R837 061G1206519 RST CHIPR 5 1 OHM 5 1 4W...

Page 34: ...87G 501 32 S AC SOCKET CN902 095G 825 7D501 Wire Harness 9P 7P SCN 80MM CN901 006G 31500 EYELET L904 073G 253 91 LS CHOKE BY LI SHIN L903 073G 253 91 LS CHOKE BY LI SHIN L902 073L 174 40 HG GBQM4 778 391 L901 073L 174 53 LG GP CHOKE L902 006G 31502 1 5MM RIVET L901 006G 31502 1 5MM RIVET L905 071G 55 29 FERRITE BEAD L906 071G 55 29 FERRITE BEAD FB901 071G 55 29 FERRITE BEAD F901 084G 33 10 FUSE CL...

Page 35: ...d DAT3 DAT3 5V SYNC GND HPD G RGB GND DAT0 DAT0 0 5shield DAT5 DAT5 clk shield clk clk B GND GND CMVCC D103 BAV99 3 1 2 Add FB104 and C119 for EMI R115 100R 1 16W ZD106 RLZ5 6B VGA_G RXCN DSUB_5V CN101 DB15 1 6 2 7 3 8 4 9 5 11 12 13 14 15 10 17 16 D117 NC BAV99 3 1 2 DSUB_G 2 DET_CABLE 2 DDC_WP 2 DDC1_SDA VGA_B R104 100R 1 16W GND POWER RXCN 2 RX0N 2 VGA_R VGA_R ZD104 RLZ5 6B VGA_B DSUB_V 2 VGA_B...

Page 36: ...N BLUE R225 100R 1 16W VCC3 3 LED_ORANGE C219 0 1uF 16V C209 NC PB 0 9 3 CN201 CONN 1 2 3 4 5 6 R220 10K 1 16W C212 0 1uF 16V R208 6K8 1 16W R234 10K 1 16W VCC3 3 DET_CABLE 1 HPD_CTRL 1 adj_BACKLIGHT 4 MSCL R211 10K 1 16W EE_WP VCC3 3 VMPLL KEY2 C227 0 1uF 16V VMPLL FB204 300OHM Mute 4 PB6 MSDA C228 0 1uF 16V C224 0 22uF16V C207 0 1uF 16V R235 NC RX0P 1 R226 10K 1 16W C214 0 1uF 16V C211 0 1uF 16V...

Page 37: ...VACKP LVA1P PA6 PA5 S PPWR_ON R301 10K 1 16W LVACKM PA7 PA4 LVA3P R304 47K 1 16W R303 4K7 1 16W 2 PA0 LVBCKM PB3 LVB0P LVB3M PB4 LVBCKP LVB2M AO3401L LVB2P PA1 LVACKP PA7 PB0 LVACKM PA 0 9 2 PA8 LVB0M PB5 PB 0 9 2 PB8 LVB3M LVA1P PA9 1 PB0 PB2 PA6 LVA2M 12 28 change to 47Kohm PA1 PB7 LVA2P LVA3P PB1 PB3 LVB1M LVB0M LVB1P PB9 PB7 CN301 CONN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 2...

Page 38: ...2 Q403 2N3904S RTK PS Volume CN401 CONN 1 2 3 4 5 6 7 8 9 CMVCC Volume 2 C410 0 1uF 16V BKLT VBRI C408 100uF16V C402 100uF 16V U701 AP1117E33LA 1 2 3 VSS VOUT VIN C_PANEL_INDEX U702 3 2 1 VI VO GND BKLT EN CMVCC BKLT VBRI C407 100uF16V FB402 NC VCC3 3 R403 10K 1 16W VCC3 3 BKLT EN R401 10K 1 16W C405 0 1uF 16V VCC1 8 R406 1K 1 16W VCC3 3 Mute PANEL_ID h t t p w w w w j e l n e t ...

Page 39: ...C808 180 K1 8W R834 4 7 K 1 4W JP920 BEAD 1 2 93G 6432S NC R822 3PF 3KV 61G0805103 65G0805104 32 C828 0 1uF 57G 759 2 C814 0 22uF 25V C805 0805 2200PF 56G 608 10 C810 470pF 50V 57G 759 2 65G 3J1006ET D810 1N4148W R839 1MΩ 1 8W 57G 763 14 R832 3PF 3KV 80GL22T 1 DN OPT4 JP909 JUMPER 1 2 61G1206472 65G 3J1006ET 61G0805105 R818 47OHM 5 1 4W D805 BAV99 3 1 2 93G 64 33 R802 300KΩ 1 8W C827 0805 4700PF D...

Page 40: ...K 1 4W 93G 39S 42 T 65G0805104 32 ZD901 RLZ13B 1 2 93G 5212T52T 061G0805330 2F D906 MBRF1060CT 1 2 3 C907 22uF 25V R920 3 K 1 8W 5V 56G 158 7 93G 39S 40 T R911 220Ω 1 4W C910 0 01uF 50V 61G0805360 1F FB901 BEAD 1 2 JP903 BEAD 1 2 C913 0 1uF D904 1N4148W 93G 6432S 56G 379 79 C918 0 1uF C900 NC 65G0805104 32 93G 50460900 61G1206154 R917 68KΩ 1 8W R934 3 3MΩ 1 4W T901 6 9 5 4 2 1 7 3 10 8 Q903 STP10N...

Page 41: ...Jul 2007 P NO Printed in China h t t p w w w w j e l n e t ...