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Kobian 1990TWA, Service Manual, Page: 2 / 49

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19”W LCD Color Monitor                                  KOBIAN 1990TWA  

  

 

2 

 

Revision List 

 

Revision 

Date 

Revision History 

TPV Model 

A00 Dec.-10-08 

Initial 

Release T98SM5NCWWKBAN 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Summary of Contents for 1990TWA

Page 1: ... 5 3 Operation Instructions 6 3 1 Control Buttons 6 3 2 Attaching the Cables 7 3 3 Adjusting the Picture 7 4 Input Output Specification 10 4 1 Input Signal Connector 10 4 2 Factory Preset Display Modes 10 4 3 Panel Specification 11 5 Block Diagram 15 5 1 Software Flow Chart 15 5 2 Electrical Block Diagram 17 6 Schematic 19 6 1 Main Board 19 6 2 Power Board 24 6 3 Key Board 27 7 PCB Layout 28 7 1 M...

Page 2: ...19 W LCD Color Monitor KOBIAN 1990TWA 2 Revision List Revision Date Revision History TPV Model A00 Dec 10 08 Initial Release T98SM5NCWWKBAN ...

Page 3: ...ty characteristics may create shock fire or other hazards Under no circumstances should the original design be modified or altered without written permission from AOC AOC assumes no liability express or implied arising out of any unauthorized modification of design Servicer assumes all liability FOR PRODUCTS CONTAINING LASER DANGER Invisible laser radiation when open AVOID DIRECT EXPOSURE TO BEAM ...

Page 4: ...ck 135MHz Max Resolution 1440 900 60Hz Plug Play VESA DDC 2BTM ON Mode 37W EPA ENERGY STAR OFF Mode 1W Input Connector 15 pin D Sub Input Video Signal Analog 0 7Vp p standard 75 OHM Positive Horizontal 408mm Maximum Screen Size Vertical 255mm Power Source 100 240VAC 50 60Hz Operating Temp 0 C to 40 C Storage Temp 20 C to 60 C Environmental Considerations Operating Humidity 10 to 85 Dimension 439 0...

Page 5: ...rol logic brightness control logic and DDC The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage AC IN 100V 240V Monitor Block Diagram Video signal DDC Power Board Flat Panel and CCFL backlight Main Board RS232 Connector For white balance adjustment in factory mode HOST Computer CCFT Drive Key board ...

Page 6: ...monitor s power MENU ENTER Activate OSD menu when OSD is OFF or activate de activate adjustment function when OSD is ON or Exit OSD menu when in Brightness Contrast Adjust OSD status Volume Activates the volume control when the OSD is OFF or navigate through adjustment icons when OSD is ON or adjust a function when function is activated Volume Activates the volume control when the OSD is OFF or na...

Page 7: ...with your LCD monitor Connecting the D Sub Cable Connect one end of the 15 pin D Sub cable to the back of the monitor and connect the other end to the computer s D Sub port Connecting the Audio Cable Connect the audio cable between the monitor s audio input and the PC s audio output Caution If the AC outlet is not grounded with three holes install the proper grounding adapter not supplied 3 3 Adju...

Page 8: ...e Game Game Mode Movie Movie Mode Eco Sports Sports Mode Gamma1 Adjust to Gamma 1 Gamma2 Adjust to Gamma 2 Gamma Gamma3 Adjust to Gamma 3 Off Disable dynamic contrast ratio Luminance DCR On Enable dynamic contrast ratio Clock Adjust picture Clock to reduce Horizontal Line noise Focus Adjust Picture Phase to reduce Vertical Line noise H Position Adjust the horizontal position of the picture Image S...

Page 9: ...ble Nature Skin Mode Green Field on or off Disable or Enable Green Field Mode Sky blue on or off Disable or Enable Sky blue Mode AutoDetect on or off Disable or Enable AutoDetect Mode Color Boost Demo on or off Disable or Enable Demo Frame Size Adjust Frame Size Brightness Adjust Frame Brightness Contrast Adjust Frame Contrast Hue Adjust Frame Hue Saturation Adjust Frame Saturation Position Adjust...

Page 10: ...gnal Cable 1 5 6 10 11 15 4 2 Factory Preset Display Modes Standard Resolution Horizontal Frequency Vertical Frequency Dos mode 720 400 31 47kHz 70 0Hz 640 480 31 47kHz 60 0Hz 640 480 37 86kHz 72 8Hz VGA 640 480 37 50kHz 75 0Hz 800 600 37 879kHz 60 0Hz 800 600 48 077kHz 72 2Hz SVGA 800 600 46 875kHz 75 0Hz 1024 768 48 363kHz 60 0Hz 1024 768 56 476kHz 70 0Hz XGA 1024 768 60 021kHz 75 0Hz 1152 864 6...

Page 11: ...liquid crystal display LCD that uses amorphous silicon TFT Thin Film Transistor as switching components This model is composed of a TFT LCD panel a driver circuit and a back light unit The resolution of a 19 0 is 1440 x 900 and this model can display up to 16 7 million colors 4 3 1 General Specifications ...

Page 12: ...19 W LCD Color Monitor KOBIAN 1990TWA 12 4 3 2 Optical Characteristics ...

Page 13: ...19 W LCD Color Monitor KOBIAN 1990TWA 13 4 3 3 Electrical Characteristics TFT LCD Module ...

Page 14: ...19 W LCD Color Monitor KOBIAN 1990TWA 14 Back Light Unit ...

Page 15: ...19 W LCD Color Monitor KOBIAN 1990TWA 15 5 Block Diagram 5 1 Software Flow Chart 1 2 N Y 5 Y N 10 Y N 12 Y N 7 Y N 6 4 3 8 9 14 11 13 Y N 15 Y N 16 17 19 Y N 18 ...

Page 16: ...rn on the LED and set it to green color Scalar initializes 10 In standby mode 11 Update the lifetime of back light 12 Check the analog port are there any signals coming 13 Does the scalar send out an interrupt request 14 Wake up the scalar 15 Are there any signals coming from analog port 16 Display No connection Check Signal Cable message And go into standby mode after the message disappears 17 Pr...

Page 17: ...BIAN 1990TWA 17 5 2 Electrical Block Diagram 5 2 1 Main Board Crystal 14 318MHZ X401 FLASH ROM SST25LF020A U402 Scalar TSUM1PFR LF Include ADC OSD MCU U401 D Sub Connector CN101 Panel Interface CN403 Key Control Interface CN401 ...

Page 18: ...ier Transformer Output Rectifier 5V 16V Main Board Inverter Circuit Power Switching Sense Resistor PWM Control IC IC Power Supply Photo Couple Sampling 16V DC Switching MOS Transformer Resonance NET High Voltage Output IC Power Supply Converter PWM Control IC Open Lamp Protection Current Sampling ...

Page 19: ...1 Top 02 Input DSUB_R DSUB_G DSUB_B DSUB_V DSUB_R DSUB_G DSUB_B DET_CABLE DSUB_H DSUB_SOG DDC1_SDA DDC1_SCL DSUB_5V VCC3 3 ESD_VCC 04 Output CMVCC PB 0 9 PA 0 1 PPWR_ON PA 4 9 05 Power on_BACKLIGHT Adj_BACKLIGHT VCC1 8 CMVCC VCC3 3 Mute Volume PANEL_ID DSUB_5V CMVCC1 VCTRL ESD_VCC 03 Scalar DSUB_R DSUB_G DSUB_SOG DSUB_B DSUB_R DSUB_G DSUB_B DSUB_H DSUB_V Adj_BACKLIGHT VCC1 8 VCC3 3 PA 0 1 PB 0 9 D...

Page 20: ...2pF R106 2K2 1 16W 5 R112 75R 1 16W 5 R107 75R 1 16W 5 C109 0 047uF R105 2K2 1 16W 5 C108 5pF 50V C104 5pF 50V R115 100R 1 16W 5 R108 100R 1 16W 5 1 2 ZD104 UDZSNP5 6B R103 100R 1 16W 5 R109 390 OHM 1 16W C101 0 047uF R116 75R 1 16W 5 C106 0 047uF R114 100R 1 16W 5 GND POWER DSUB_5V DGND VCC3 3 H_Sy nc DDC1_SDA 5 DSUB_H 5 DSUB_V 5 DET_CABLE 5 DSUB_R 5 DSUB_R 5 DSUB_G 5 DSUB_G 5 DSUB_SOG 5 DSUB_B 5...

Page 21: ... 5 6 7 8 CN402 NC CONN R419 100R 1 16W 5 C404 0 1uF 16V C408 0 22uF16V C403 0 1uF 16V R429 NC C413 0 1uF 16V R410 120R 1 16W 5 R431 NC CE 1 SO 2 WP 3 VSS 4 SI 5 SCK 6 HOLD 7 VDD 8 U402 SST25LF020A 33 4C SAE R414 120R 1 16W 5 C417 0 1uF 16V C414 0 1uF 16V R420 100R 1 16W 5 C416 0 1uF 16V RIN0P 13 GIN0P 10 SOGIN0 11 BIN0P 8 RIN0M 12 GIN0M 9 BIN0M 7 HSYNC0 16 VSYNC0 17 REXT 4 REFP 15 REFM 14 SDO 21 S...

Page 22: ...1 22 23 24 25 26 27 28 29 30 CN403 CONN R434 330 OHM 1 4W C419 0 1uF 16V R433 10K 1 16W 5 PANEL_VCC PANEL_VCC CMVCC OEM MODEL Size Rev Date Sheet of TPV MODEL PCB NAME 称爹 T P V Top Victory Electronics Co Ltd Key Component 絬 隔 瓜 絪 腹 1 A 6 7 Tuesday April 08 2008 715G2904 1 称爹 04 Output PB9 PB8 PB7 PA 0 1 PB6 PA4 PA5 PA 4 9 PA7 PA6 PA9 PA8 PB5 PB4 PB3 PB4 PB 0 9 PB1 PB0 PB3 PB5 PB2 PB9 PB8 PB7 PB6 P...

Page 23: ...6W 5 Q406 2N3904S RTK PS 1 2 3 4 5 6 7 8 9 CN404 CONN C425 NC R448 4K7 1 16W 5 C422 0 1uF 16V R449 NC C428 0 1uF 16V CMVCC MVCC VCC3 3 VCC3 3 VCC3 3 VCC3 3 VCC3 3 VCC3 3 CMVCC1 VCC1 8 CMVCC1 3 1 2 D401 NC BAV99 DSUB_5V 2 DSUB_5V VCC3 3 VCTRL 5 R450 NC NC R0402 Volume BKLT EN BKLT VBRI Mute C_PANEL_INDEX BKLT EN Volume CMVCC BKLT VBRI CMVCC ADJ GND 1 VOUT 2 VIN 3 U404 AP1117D33LA OEM MODEL Size Rev...

Page 24: ...SE C910 0 047uF R925 1K 1 8W 1 2 3 4 5 6 7 8 9 10 11 12 13 CN902 CONN R940 NC Q903 PMBS3904 R942 1K 1 10W 1 D903 LL4148 3 5A USB AUDIO 1 5A main PCB 2A INVERTER 5V1 1 2 HS2 EMI shield NC H85G0002 1 C930 0 1uF 1 2 FB902 80OHM 1 2 FB901 BEAD 1 4 2 3 L901 OEM MODEL Size Rev Date Sheet of TPV MODEL PCB NAME 称爹 T P V Top Victory Electronics Co Ltd Key Component 絬 隔 瓜 絪 腹 1 Custom 2 4 Wednesday Septembe...

Page 25: ...F 25V C819 1uF 16V Q810 PMBS3904 C816 1500PF 50V Q811 PMBS3904 R835 1K 1 8W R830 0R05 1 8W 3 1 2 D802 BAV99 Q807 PMBS3904 R819 10K 1 10W 1 S 1 G 2 S 3 G 4 D 8 D 7 D 6 D 5 Q804 AM9945N T1 PF 1 2 ZD801 NC RLZ6 8C C807 0 1uF 16V 1 2 4 3 L801 NC L C822 1500PF 50V R832 0R05 1 8W R804 0R05 1 8W R821 1M 1 10W 5 R816 68K OHM 1 1 10W R853 10K 1 10W 1 R826 180KOHM1 8W R828 47K 1 10W 1IN 1 1IN 2 FEEDBACK 3 D...

Page 26: ... C613 0 1uF 16V R609 10K 1 10W 5 Q607 PMBS3904 C602 0 47uF 16V Q608 RK7002 C610 100pF SHUTDOWN 1 BYPASS 2 RIN 3 GND 4 GND 5 LIN 6 VOLUME 7 SE BTL 8 LOUT 9 VDD 10 LOUT 11 GND 12 GND 13 ROUT 14 VDD 15 ROUT 16 IC601 IC APA2069 R601 10K 1 10W 5 R610 27KOHM 5 C608 1uF 25V R611 4 7KOHM 5 1 2 3 5 4 CN601 PHONEJACK C605 22uF 50V R608 0R05 1 8W 1 2 FB602 BEAD C601 0 47uF 16V C603 0 47uF 16V C604 100uF 25V ...

Page 27: ...A B 2 2 Thursday January 10 2008 715G2835 1 称爹 2 0 key 2 1 3 4 5 SW005 SW SGND 1 2 3 4 5 6 CN001 CONN ZD001 NC UDZS5 6B OK DOWN UP CONNECTOR LED MENU Power C006 NC 0 1uF C008 NC 0 1uF ZD004 NC UDZS5 6B C010 NC 0 1uF ZD003 NC UDZS5 6B LED_RED C009 NC 0 1uF ZD005 NC UDZS5 6B R004 2K OHM 1 4W R003 0R05 1 10W 1 C005 NC 0 001uF C003 NC 0 001uF R002 2K OHM 1 4W C004 NC 0 001uF C001 NC 0 001uF C002 NC 0 ...

Page 28: ...19 W LCD Color Monitor KOBIAN 1990TWA 28 7 PCB Layout 7 1 Main Board 715G2904 1 ...

Page 29: ...19 W LCD Color Monitor KOBIAN 1990TWA 29 7 2 Power Board 715G2824 2 2 ...

Page 30: ...19 W LCD Color Monitor KOBIAN 1990TWA 30 7 3 Key Board 715G2835 1 ...

Page 31: ...olor Analyzer 7 Service Manual 8 User Manual 8 2 Trouble Shooting 8 2 1 Main Board No power No power Press power key and look if the picture is normal Please reinsert and make sure the AC of 100V 240V is normal Reinsert or check the power section Check if X401 oscillate waveforms are normal Check C423 1 8V U404 Vout 3 3V OK OK NG NG NG Check CN404 or replace Q409 Q410 and U404 Replace U401 Replace...

Page 32: ...al Replace U401 Replace X401 Check C423 1 8V U404 Vout 3 3V Check Correspondent component Replace U401 Check X401 oscillate waveform is normal Check CN404 or replace Q409 Q410 and U404 OK OK OK OK OK NG NG NG NG Check reset circuit of U401 is normal Check HS VS from CN101 is normal Replace X401 Check Correspondent component NG NG OK ...

Page 33: ...en Measure Q404 base is low level X401 oscillate waveform is normal Check CN403 is solder and Q405 is OK Check Correspondent component Replace PANEL Check Correspondent component Replace U401 OK OK OK Replace X401 OK NG NG NG NG Check reset circuit of U401 is normal ...

Page 34: ...f C905 Check bridge rectified circuit and F901 circuit Check start voltage for the pin3 of U901 Check R904 R905 R906 Change U901 NG Check the auxiliary voltage is bigger than 10V and smaller than 20V 1 Check U901 2 Check D900 D901 circuit OK OK NG Check Q903 IC903 IC904 ZD921 ZD922 OK Check U901 pin8 PWM wave OK Check U901 NG OK NG NG ...

Page 35: ...oard NG OK Check U801 PIN12 16V NG OK Change ON OFF circuit Check U801 PIN5 have triangle wave NG OK Change U801 Check U801 PIN9 PIN10 PWM wave NG OK Check U801 Check Q804 Q809 Drain wave NG Check the output of T801 T802 Check Q810 Q805 Q811 Q806 Check connecter lamp feedback and protect circuit OK NG Change T801 T802 OK ...

Page 36: ...36 8 2 3 Key Board OSD is unstable or not working Is Key Pad Board connecting normally Connect Key Pad Board Is Button Switch normally Replace Button Switch OK NG NG Is Key Pad Board Normally Replace Key Pad Board OK NG OK Check Main Board ...

Page 37: ...or down arrow on chroma 7120 3 The LCD indicator on chroma 7120 will show x 313 30 y 329 30 Y 150cd m2 4 Adjust the RED on factory window until chroma 7120 indicator reached the value R 100 5 Adjust the GREEN on factory window until chroma 7120 indicator reached the value G 100 6 Adjust the BLUE on factory window until chroma 7120 indicator reached the value B 100 7 Repeat above procedure item 4 5...

Page 38: ...th press MODE button 2 Switch the MEM channel to Channel 10 with up or down arrow on chroma 7120 3 The LCD indicator on chroma 7120 will show x 313 30 y 329 30 Y 150cd m2 4 Adjust the RED on factory window until chroma 7120 indicator reached the value R 100 5 Adjust the GREEN on factory window until chroma 7120 indicator reached the value G 100 6 Adjust the BLUE of on factory window until chroma 7...

Page 39: ...19 W LCD Color Monitor KOBIAN 1990TWA 39 10 Monitor Exploded View ...

Page 40: ...INGE 750GLS90M31DCN PANEL LTM190M2 L31 8UP FQ SEC AM1G1740 12 47 CR3 SCREW CBPC8SM5A2Q1 MAIN BOARD 040G 45762412B CBPC LABEL CN401 033G3802 6 WAFER CN404 033G3802 9 WAFER 9P RIGHT ANELE PITCH CN403 033G801930F CH JS CONNECTOR C426 067G 3151014KV EC 105 CAP 100UF M 25V C427 067G 3151014KV EC 105 CAP 100UF M 25V C423 067G 3151014KV EC 105 CAP 100UF M 25V C421 067G 3151014KV EC 105 CAP 100UF M 25V C4...

Page 41: ...ST CHIPR 100 OHM 5 1 16W R456 061G0402101 RST CHIPR 100 OHM 5 1 16W R442 061G0402101 RST CHIPR 100 OHM 5 1 16W R441 061G0402102 RST CHIPR 1 KOHM 5 1 16W R118 061G0402102 RST CHIPR 1 KOHM 5 1 16W R439 061G0402103 RST CHIPR 10 KOHM 5 1 16W R437 061G0402103 RST CHIPR 10 KOHM 5 1 16W R433 061G0402103 RST CHIPR 10 KOHM 5 1 16W R421 061G0402103 RST CHIPR 10 KOHM 5 1 16W R417 061G0402103 RST CHIPR 10 KOH...

Page 42: ...2104 15 MLCC 0402 0 1UF K 16V X5R C432 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C412 065G0402220 31 CHIP 22PF 50V NPO C411 065G0402220 31 CHIP 22PF 50V NPO C103 065G0402220 31 CHIP 22PF 50V NPO C102 065G0402220 31 CHIP 22PF 50V NPO C408 065G0402224 17 CAP CER 0 22UF 20 80 C101 065G0402473 12 CHIP 0 047UF 16V X7R C105 065G0402473 12 CHIP 0 047UF 16V X7R C106 065G0402473 12 CHIP 0 047UF 16V X7R C107...

Page 43: ...LABEL CN602 033G3802 4 WAFER EH 4 CN803 033G8021 2E U INVERT CONNECTOR CN802 033G8021 2E U INVERT CONNECTOR CN801 033G8021 2E U INVERT CONNECTOR CN804 033G8021 2E U INVERT CONNECTOR IC903 056G 139 3A IC PC123Y22FZ0F IC601 056G 616 34 IC APA2069JITUL 2 6W 2 PDIP 16 NR901 061G 5810T RST NTCR 8 OHM 20 4A 13MM THINKING C903 063G 10747410V 0 47UF 275VAC ARCO C801 065G 3J1806ET 18PF 5 SL3KV TDK C812 065...

Page 44: ...Q811 057G 417 4 PMBS3904 PHILIPS SMT 04 Q903 057G 417 4 PMBS3904 PHILIPS SMT 04 Q805 057G 417 6 PMBS3906 PHILIPS SMT 06 Q806 057G 417 6 PMBS3906 PHILIPS SMT 06 Q607 057G 417 6 PMBS3906 PHILIPS SMT 06 Q804 057G 600 55 P5506 HVG SO 8 Q809 057G 600 55 P5506 HVG SO 8 Q608 057G 759 2 RK7002FD5T116 SOT 23 BY ROHM Q808 057G 759 2 RK7002FD5T116 SOT 23 BY ROHM Q801 057G 760 4B PDTA144WK SOT346 Q802 057G 76...

Page 45: ...OHM 5 1 10W YAGEO R828 061G0603470 2F RST CHIPR 47 KOHM 1 1 10W R815 061G0603470 2F RST CHIPR 47 KOHM 1 1 10W R842 061G0603470 2F RST CHIPR 47 KOHM 1 1 10W R611 061G0603472 Y RST CHIPR 4 7KOHM 5 1 10W YAGEO R822 061G0603473 RST CHIPR 47 KOHM 5 1 10W R607 061G0603562 RST CHIPR 5 6 KOHM 5 1 10W R606 061G0603562 RST CHIPR 5 6 KOHM 5 1 10W R820 061G0603564 RST CHIPR 560 KOHM 5 1 10W R829 061G0603680 2...

Page 46: ...PR 100 OHM 5 1 4W R951 061G1206101 RST CHIPR 100 OHM 5 1 4W R961 061G1206101 RST CHIPR 100 OHM 5 1 4W R962 061G1206101 RST CHIPR 100 OHM 5 1 4W R902 061G1206105 1M 1206 R901 061G1206105 1M 1206 R810 061G1206150 RST CHIPR 15 OHM 5 1 4W R837 061G1206150 RST CHIPR 15 OHM 5 1 4W R850 061G1206150 RST CHIPR 15 OHM 5 1 4W R851 061G1206150 RST CHIPR 15 OHM 5 1 4W R912 061G1206221 RST CHIPR 220 OHM 5 1 4W ...

Page 47: ...P 1500PF 50V X7R 0805 C809 065G0805221 31 CAP CHIP 0805 220PF J 50V NPO C808 065G0805225 22 CHIP 2 2UF 25V X7R 0805 C909 065G0805471 21 CAP CHIP 0805 470PF J 25V NPO C828 065G0805472 32 CAP CHIP 0805 4700PF K 50V X7R C827 065G0805472 32 CAP CHIP 0805 4700PF K 50V X7R C910 065G0805473 32 CHIP 0 047UF 50V X7R C935 065G1206102 72 CAP CHIP 1206 1000PF K 500V X7R C912 065G1206102 72 CAP CHIP 1206 1000P...

Page 48: ...5G 90 23 JUMPER J820 095G 90 23 JUMPER J819 095G 90 23 JUMPER J818 095G 90 23 JUMPER J817 095G 90 23 JUMPER J816 095G 90 23 JUMPER J815 095G 90 23 JUMPER J814 095G 90 23 JUMPER J813 095G 90 23 JUMPER J812 095G 90 23 JUMPER J811 095G 90 23 JUMPER J810 095G 90 23 JUMPER J809 095G 90 23 JUMPER J901 095G 90 23 JUMPER J606 095G 90 23 JUMPER J605 095G 90 23 JUMPER J604 095G 90 23 JUMPER J603 095G 90 23 ...

Page 49: ...GNETIC CORE FP2 EEL19 Q34FPE19P06 CASE EEL19 Q34FPE19P06P01 FRAMEWORK EEL19HP09 10SLOT 071FPC28101 08 MAGNETIC CORE PC40 ER2828 A280 034FPC28T01P05 FRAMEWORK ZY 2803 LACK PIN2 Q15G0245801 MAINFRAME L19WA 8Q Q33G0170ABJ 1L0100 KEY PAD Q33G0171 1 1C0100 LENS Q34G0264ABJA2B0130 BEZEL L19WA 8Q2 Q34G0265ABJA8B0100 REAR COVER19 Q40G 19N011 1B RATING LABEL Q44G9123011 1B 19 LCD KOBIAN CARTON Q44G9123101 ...

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