SERVICE MANUAL LM520i Monitor (With CPTXG08 PANEL) THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY.EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OFTHIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES, ERRORS OR OMISSIONS.
TABLE OF CONTENTS PAGE 1. SPECIFICATIONS .................................................................................................... 1-1 GENERAL SPECIFICATIONS ...................................................….............. 1-2 LCD MONITOR DESCRIPTION .................................................................. 1-3 INTERFACE CONNECTOR .................................................................……. 3 3 4 4 2. PRECAUTION AND NOTICES ...................................................
1. SPECIFICATIONS FOR LCD MONITOR 1-1 1. General specifications LCD-PANEL : Active display area Pixel pitch Pixel format 15 inches or 15.1 inches diagonal 0.297 mm x 0.297 mm 1024 x 768 RGB vertical stripe arrangement 2. Display Color : 6-bit, 262144 colors or 8-bit, 16.7 million colors 3. ●External Controls : a).Power On/Off, Auto key, Rotary-knob ( for shuttle) b).
1-2 LCD MONITOR DESCRIPTION The LCD MONITOR will contain an main board, an inverter/power board, keypad board and internal adapter which house the flat panel control 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. Monitor Block Diagram Flat Panel and CCFL backlight CCFL Drive.
2. PRECAUTIONS AND NOTICES 2-1 ASSEMBLY PRECAUTION (1) Please do not press or scratch LCD panel surface with anything hard. And do not soil LCD panel surface by touching with bare hands (Polarizer film, surface of LCD panel is easy to be flawed) In the LCD panel, the gap between two glass plates is kept perfectly even to maintain display characteristic and reliability.
3. OPERATING INSTRUCTIONS This procedure gives you instructions for installing and using the LM520 LCD monitor display. 1. Position the display on the desired operation and plug–in the power cord into External Adapter AC outlet. Threewire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical conduct ground.
4. ADJUSTMENT 4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS Adjustments should be undertaken only on following function : contrast, brightness focus, clock, H-position, Vposition, red, green, blue since C1 color & C2 color. No volume adjust description 4-2 ADJUSTMENT METHOD Press MENU button to activate OSD Menu or make a confirmation on desired function, Press Left/Right button to select the function or done the adjustment. 1.
Press MENU button for 2 seconds along with plug-in AC power cord will be in factory mode, and the OSD screen will located at left top of panel but take cautions don’t press icon “C2” & “C1”, if you press C2/C1 , your white-balance data will overlap with the new-one, and you must perform the white-balance process again.
5. CIRCUIT-DESCRIPTION 5-1 PANEL SPECIFICATION (CPT XG08) 5-1-1Panel Feature － 15” XGA TFT LCD Panel － 2 CCFLS Backlight System － Supported (H1024Pixel × V768Lines) resolution － By applying 6 bit digital data 5-1-2 Display Characteristics Items Display Area Driver element Display color Number of pixels Pixel Arrangement Pixel pitch Display Mode Specification 304.128(H) x 228.096 (V) a-Si TFT active matrix Over 16 million 1024 x 768 RGB vertical stripe 0.297(H) x 0.
ITEM SYMBOL MIN. TYP. MAX. UNIT Input voltage Vin 10.8 12 13.2 V Input current Iin 2250 2500 mA FOR 4 LOAD Output Current Iout 6.0 6.5 7.0 mA FOR 1 LOAD Frequency F 50.0 55.0 60.0 KHZ FOR 1 LOAD H.V open Vopen 1450 1600 1750 Vrms NO LOAD H.V Load Vload 710 810 910 Vrms RL=120KΩ 1650 1750 1850 Vrms RL=CCFL 0.4 1 4 Sec Start voltage Protect delay time Vst PDT REMARK INVERTER MIN BRINGTHNESS (Vadj:0.
b. INPUT frequency out of VESA-spec. (out of tolerance too far) 3.
Inverter Block Diagram 12
5-4 SOFTWARE FLOW CHART 1 Y 2 3 N 4 N 5 Y 6 7 N 8 N 11 Y 9 10 Y N 12 13 Y Y 14 15 Y 17 18 N 19 Y 13 N N 16
1) MCU initialize. 2) Is the eeprom blank ? 3) Program the eeprom by default values. 4) Get the PWM value of brightness from eeprom. 5) Is the power key pressed ? 6) Clear all global flags. 7) Are the AUTO and SELECT keys pressed ? 8) Enter factory mode. 9) Save the power key status into eeprom. Turn on the LED and set it to green color. Scaler initialize. 10) In standby mode ? 11) Update the life time of back light.
6. Trouble Shooting 6-1.MAIN BOARD 1.NO SCREEN APPEAR Check CN504 pin 10 = 2.5 V? Check CN504 pin 8 = 3.3 V? Check CN504 pin 4 = 5 V? Measured CN402 pin 1/2 = 5V? Measured CN402 pin 3/4 = Check Correspondent component. Is there any shortage or cold solder? Check Power Board. Yes, all DC level exist Yes .
PANEL-POWER CIRCUIT NG check R824 should have response from 14V t 0V When we switch the power switch from on t Check the PPWR panel power relative circuit, R223、Q200、Q201(pin2) In normal operation, when LED =green, R223 should =0 v, If PPWR no-response when the power switch Turn on and turn off, replace the U501-GMZAN1 OK,R225 have Measured the Q201 pin 2= 3.3 V? NG, no Voltage Yes Check Q201 pin 3= 3.
2.PANEL POWER CIRCUIT check R507 should have response from 0V to 3.3V When we switch the power switch from on to off NG Check the PPWR panel power relative circuit, Q501, Q502 In normal operation, when LED =green, R507 should =0 v, If PPWR no-response when the power switch Turn on and turn off, replace the U203-GM5120/2120 OK NG, no Voltage Check U202 pin 2= 3.3V Measured the Q501 pin 3= 3.3 V? Yes OK, Replace Q501 ( AO3401) OK 3.
4.U203-DATA OUTPUT Measured DCLK DVS, DHS (pin 117,116 from U203 ) Is the waveform ok? DCLK around 40 MHz , DVS=60.09Hz , DHS around 80 KHz ?(refer to input signal= 640x480@60 Hz 31k, and LED is Green) NG , no transition Replace GM5115 /2115 (U203) or replace Main board.
6-2.Power/Inverter Board 1.
2.
7.
7.
85L 634 11 89L 176 50 N 89L1735GAA D1 89L176J 50 N 89L412A15N IS 89L412A15N YH 95L8021 12501 M1L 330 4128 M1L 330 4128 M1L1130 6128 M1L1140 6128 Q1L 330 8120 Q1L 330 8120 705L562KB34157 750LLC50G08 2 -----------------------------NO : PARENT CBPC560KCDAC -----------------------------AIC560KHDAC CN11 33L800912A CN9 33L8027 16 40L 457624 1B 40L 45762412A 51L 6 4500 51L 6 4502 51L 6 4503 52L6026 1 52L6026 2 U6 56L1133 42 C3 CN2 88L 35315FHAS X1 93L 22 53 -----------------------------PARENT NO : AIC560KHDAC ----
Q2 U9 U7 U2 U3 Q1 Q5 RP2 RP3 FB1 FB2 FB3 R114 R118 R219 R223 R23 R26 R39 R41 R59 R74 R76 R83 R90 R91 R10 R15 R16 R17 R18 R24 R27 R5 R6 R8 R117 R51 R85 R20 R21 R225 R33 R53 R56 R57 56L 566 6 56L 585 7 56L1133 33 56L1133 34 56L4LVC 14 P 57L 417 4 57L 417 4 61L 125103 8 61L 125472 8 61L0603000 61L0603000 61L0603000 61L0603000 61L0603000 61L0603000 61L0603000 61L0603000 61L0603000 61L0603000 61L0603000 61L0603000 61L0603000 61L0603000 61L0603000 61L0603000 61L0603000 61L0603101 61L0603101 61L0603101 61L0603101
R64 R65 R66 R70 R71 R84 R94 R200 R201 R203 R80 R82 R42 R43 R86 R52 R54 R55 R87 R88 R89 R92 R19 R28 R113 R115 R32 R46 R95 R38 R40 R29 R30 R31 FB18 FB19 C77 C83 C84 C85 C88 C96 C97 C98 C10 C11 61L0603103 61L0603103 61L0603103 61L0603103 61L0603103 61L0603103 61L0603103 61L0603104 61L0603104 61L0603104 61L0603104 61L0603104 61L0603202 61L0603202 61L0603302 61L0603330 61L0603330 61L0603330 61L0603330 61L0603330 61L0603330 61L0603330 61L0603470 61L0603470 61L0603472 61L0603472 61L0603472 61L0603472 61L0603472 6
C14 C15 C7 C8 C119 C12 C121 C124 C125 C17 C24 C25 C27 C28 C29 C30 C31 C32 C33 C34 C37 C38 C39 C40 C41 C42 C43 C44 C45 C46 C47 C50 C51 C52 C53 C54 C55 C58 C59 C6 C60 C61 C62 C65 C71 C72 65L0603103 32 65L0603103 32 65L0603103 32 65L0603103 32 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0603104 12 65L0
C80 C82 C87 C68 C69 C111 C117 C120 C126 C48 C73 C75 C127 C23 C36 C49 C57 C64 C70 FB11 FB12 FB10 FB4 FB5 FB6 FB7 FB8 FB9 R50 R69 R78 R50 R69 R78 U6 ZD2 ZD3 ZD6 ZD7 ZD8 ZD9 ZD2 ZD3 ZD6 ZD7 ZD8 65L0603104 37 65L0603104 37 65L0603473 32 65L0603509 31 65L0603509 31 67L 312101 3 67L 312101 3 67L 312101 3 67L 312101 3 67L 312101 3 67L 312101 3 67L 312101 3 67L 312220 3 67L 312220 3 67L 312220 3 67L 312220 3 67L 312220 3 67L 312220 3 67L 312220 3 71L 56B221 71L 56B221 71L 56Z601 71L 56Z601 71L 56Z601 71L 56Z601 71
ZD9 D13 D13 D14 D14 D10 D11 D12 D15 D16 93L 39149 93L 60220 93L 60230 93L 64 32 93L 6432V 93L 6433P 93L 6433P 93L 6433P 93L1004 3 93L1020 1 S 715L1100 1 -----------------------------PARENT NO : KEPC562KD1 -----------------------------AIK562KD1 SW101 77L 600 1GHJ SW102 77L 600 1GHJ SW103 77L 600 1GHJ SW104 77L 600 1GHJ SW105 77L 600 1GHJ LED1 81L 12 1 BH LED1 81L 12 1 GP JP801 95L8014 8506 -----------------------------PARENT NO : AIK562KD1 -----------------------------715L 707 1 1 J101 95L 90 23 J102 95L 90
IC902 IC902 IC902 IC901 Q209 Q210 R919 NR901 R903 C904 C904 C904 C213 C213 C906 C906 C906 C215 C216 C215 C216 C901 C902 C901 C902 C901 C902 C913 C913 C922 C925 C922 C925 C905 L902 L902 L202 L202 L903 L904 L903 L201 40L 45762412A 51L 6 4500 51L 6 4502 51L 6 4503 56L 139 3 56L 139 3A 56L 139 3B 56L 379 32 57L 761 6 57L 761 6 61L 2J39864B 61L 58080 WT 61L152M104 64 63L 107474 5S 63L 107474 HS 63L 10747410S 63L210J2242A2 64L180J224AAT 65L 2K152 5E6052 65L 2K152 5E6285 65L 2K152 5E6921 65L 3J2206EM 65L 3J2206EM
L201 L201 PT201 PT201 T901 T901 T901 F901 F901 F901 BD901 BD901 D912 D912 D910 D910 CN201 CN202 73L 253139 YL 73L 253139LSL 80LL15T 7 DN 80LL15T 7 YS 80LL17T 2 L 80LL17T 2 T 80LL17T 2 LS 84L 53 1 84L 7H200 NL 84L 7H200 SL 93L 50460 8 93L 50460502 93L3006 1 93L3006 3 93L3010 1 93L3010 2 33L8020 2D U 33L8020 2D U 705L 560 57 01 705L 780 57 02 -----------------------------NO : PARENT PW5215A1E1SMT -----------------------------U201 56L 379 31 Q203 56L 566 10 U201 56L 608 1 Q203 56L 763 4 Q202 57L 760 4 Q201 57
R926 R916 R925 F902 R912 R219 R232 R915 R901 R902 R904 R905 R224 R225 R226 R227 R909 R910 R911 R906 R907 C910 C927 C928 C202 C205 C203 C209 C211 C219 C225 C208 C221 D203 D203 ZD904 ZD904 ZD901 ZD901 D201 D201 D201 D201 ------- 61L0805240 1F 61L0805240 2F 61L0805261 1F 61L1206000 4 61L1206101 61L1206102 61L1206102 61L1206103 61L1206105 61L1206105 61L1206105 61L1206105 61L1206152 61L1206152 61L1206152 61L1206152 61L1206472 61L1206472 61L1206472 61L1206684 61L1206684 65L0603104 37 65L0603104 37 65L0603104 37
------C207 C905 L902 PT201 T901 J101 J102 J105 J106 J107 J108 J109 J110 J111 J112 J113 J114 J115 J116 J901 J902 J903 J904 J905 J906 R917 R930 R918 R922 R908 R220 R205 R201 R920 FB902 FB903 FB901 D901 D902 D205 D207 D209 D903 IC903 -----------------------67L 309330 7T 6L 31502 6L 31502 6L 31502 6L 31502 715L1034 1A 1 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L 90 23 95L
Q207 Q205 Q902 Q901 C911 C204 C909 C936 C908 C920 C921 C920 C921 C920 C921 C907 C924 C926 C201 ------PARENT ------- 57L 414 2 57L 417 3 T 57L 419 PP T 57L 420 PP T 64L700J1020AT 64L700J1040AT 64L700J1040AT 64L700J1040AT 65L 450104 7T 65L517K102 5T6052 65L517K102 5T6052 65L517K102 5T6213 65L517K102 5T6213 65L517K102 5T6285 65L517K102 5T6285 67L 309220 7T 67L215B4713HT 67L215B4713HT 67L215C1514HT -----------------------NO : 705L 560 57 01 -----------------------51L 200 1 Q903 57L 723 3B Q903 57L 724 4 Q903 5
37L 446 1 M1L 340 8128 Q1L 330 8120 Q1L 340 8128 AM1L1740 12128 LCD HINGE (L501-C) SCREW SCREW 3X8mm SCREW 4X8mm SCREW 1 2 2 1 4 PCS PCS PCS PCS PCS 9. Schematic 3.3V_DDDS FB201 600 OHM + +3.3V C223 C222 22uF/16V Close to respective power Pins FB202 600 OHM + C225 C224 22uF/16V 0.1uF/16V GND 0.1uF/16V GND GND C210 C228 0.1uF/16V 3.3V_RGB Close to respective power Pins 0.1uF/16V C217 C218 C219 C220 C231 + C229 22uF/16V C230 22uF/16V C232 C233 0.1uF/16V 0.
+5V +5V 4.7K +3.3V +2.5V +12V CN504 R356 1/16W +2.5V +3.3V R358 1K 1/16W +5V R357 1/16W 10K BKLT_EN PBIAS C354 C358 0.1uF/16V 0.1uF/16V + C364 470uF/16V 1 3 5 7 9 11 C360 C365 C366 2 4 6 8 10 12 PWM0 C359 C362 C361 0.1uF/16V 0.1uF/16V + + C367 0.1uF/16V C353 470uF/16V 1uF C363 0.1uF/16V 0.1uF/16V 470uF/16V CONN 0.1uF/16V GND GND +3.3V C368 0.
8-2 Inverter/Power Board TP1 HVO TP3 HVL TP4 HVL 1 1 1 Q203 SI4431DY-T1 1 2 3 R212 4 3.9K 1/16W +12V R214 2.2K 1/16W C202 0.1uF/25V Q202 DTA144WKA C225 1uF/25V R219 1K 1/16W R224 1K 1/16W D203 RLZ11B R225 R226 1K 1/16W 1K 1/16W R227 1K 1/16W R216 220 1/16W R218 100 1/16W C213 .
10. PCB Layout 10-1 .
10-2 .
