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SERVICE MANUAL

1. VCPU 2 VCPU T 1 GEO R60 2 R602 Ken RN602 10K 1716W 10K Y160K oe EK UTEN a C604 22pF 1 T U601 3 2601 35 43 POWER J En 8 dda 42 ENTER C60 21 ME RIGHT AR 10uFf16v 20vHz XTALI P0 2 20 Ee LEFT zken l AUTO 1 FUR RES Fod Ee l LED B C604 22pF pole Lat ll LED O 10 6 36 LED_G RESET PO 7 P2 0 Ha HWRESET 4 ME rei 12 pas EE onPANEL_5V 3 3V 2 INT DE ING P3 2 P2 2 onBACKLITE 2 beia 10K6 throw 130 INT1 P3 3 P23 15 CSZ 4 VCPU X 3 ALEIP P2 4 l 39 SCL 4 T o PSEN P2 5 SDA 4 len R606 mm EW VERU R604 A 10K 1 16VR608 100 116W__2 EBEN R607 10K 1716W c60 mem E S db IEN 3 e Top34 l G ADO 4 5 P1 2 T1 P3 5 Hg AD1 4 Gg P3 6 WR ig AD2 4 77 P1 4 P3 7 RD AD3 4 P1 5 Sl pris B P3 1 TXD E deia DDC_DAT 3 x P1 7 2 P3 0 RXD MA DDC_CLK 3 EEG AY 100 GW mn E R61 10K 111 W78EG5P 40 R63 100 1716W GE f A Zeri RD 3 VCC12V VCC5V FB601 NC 4 MI
2. EN7220 Service Manual 6 6 o oH FB301 O 116W ___ R301 100 1 16W 0 047UF RIN 4 12 och H FB302 o 1 16W xx R30 100 1 16W C309 0 047uF gin N Gua Tz F8303 o 1 16W t R303 A100 1 16W C30d 0 0474 au o 14 4 zi zl Ra 470 1 16W C307 0 001uF Ti Org POSV R325 A Kan Y p302 EE cam W gt soc 4 515251 Ss Be Poe VGA CON 75 1165 he She SNC dee e il R305 NIOO 1190 C308 0 047UE eue 4 LI R306 A100 116W C30d 0 0474F ue 4 Jl R307 A A100 ABW C310 0 0474F eeure 4 0301 D302 D303 VCCSV vecsv I T R308 10K 16w VCCSV R309 LO IEW st nen 6 POSV HSI EB304 150 OHM BIO 150 HW sync 4 S 7 VSI a R31 100 1 16W R31 AAK 1 16w gt vsyne 4 W VW 2304 BAT54C GS08 D319 D320 R313 can R314 c312 0317 al A MLL52328 56V AU MLL52328 5 6V MLL5232B 5 6V 22K 1 16W 33pF 10k 1 16W 220pF R317 44 R318 Tm Com 10K 1 16W 10K anew 8 vcc mH 0 1uF i CLK DDC R31 100 1 ew GO Ab DAT DDT mew c e Ae CN302 D321 D318 x EE ZAR M52328 5 6v AR MLL52328 5 6V DDE DAT E X Eder VCCSV BUE RGB GND L al HSYNG x Bart douk 3 CLK DDC2 R31 NC DVISV D305 Ber DAT DDC2 i Ge R321 NC DDC SDA Hg Ne 5V Wei DE R322 NC ST DET
3. VCC3 3 FB401 VPO VCC2 5 FB402 VDD gt 2 VCC3 3 LM ao a o aa 2 VCC2 5 06 SAM tt C405 l 10UF 16V cau Li 10UF 16V C4080407040804090410041104120413 n EEN 0 1uP 1uP 1uP 1410 TUR TUR 1uB 1uF 0 1uP 1uP 1u 1uF 102 PAO VAA1 FB403 VAD PA PA O 9 5 gt 2 VAAI Io cata l 10UF 16V C4200421 118_PBO 0 1uB 1uF PB O 9 PB O 9 5 VAA2 FB404 VPLL 2 VARD 600 OHM ua la 10uF 16V EE C423 0 1uF VAA3 FB405 VDVI vecsy 2 VAA3 LEE z c424 _ e 10UF 16V EN 04250426 E VCC3 3 0 1uB 1uF 7 X os 78 Sd R402 31 be 4 Se AMON VAA4 FB406 VDPLL 6 2 VAM 600 OHM ber J R401 10uF 16V NC i C428 0 1uF R401 R402 Direct Bus NC 4 7K 3 WIRE 4 7K NC CN503 LVBOM RXOO 1 2 RXO0 LVBOP VBTM RXOT 3 4 RXOTF VBTP VB2M RS 5 6 RXO2 LVB2P VBCKM RXOC 7 8 RXOC LVBCKP LVB3M RXO3 9 10 RXO3 LVB3P TVAUM RXEO 11 12 RXEO LVAOP LVA1M RXE1 13 14 RXE1 LVA1P LVA2M RXE2 15 16 RXE2 LVA2P LVACKM RXEC 17 18 RXEC LVACKP LVA3M RXE3 19 20 RXE3 LVA3P 21 22 23 24 CON24A R502 D 1 16W 21 EN7220 Service Manual
4. DDC CLK csz csz DDC DAT SCL SCL VCPU VCC12V VCCSV RA SDA RDA DD HWRESET HWRESET INT INT ADO ADO vecsv AD1 ADI AD2 AD2 VCC12V AD3 AD3 PA O 9 PA 0 9 PA 0 9 CPU Volume AA volume onPANEL 5V 3 3V VLCD VCC12VT PB 0 9 PB 0 9 vcc3 3 6 MCU vLCD e onBACKLITE onPanel 5V 3 3V 5 PANEL INTERFACE VCPU VCC12V VCC3 3 VCC2 5 AdjBACKLITE GF AdjBACKLITE VAAT VAA2 co VAA3 VAA4 VCC5V vico ii 4 SCALER 2 POWER vecsv vecsv T VEG 12V U201 1 R202 VCC2 5 NOUDV 8 RT9164 250G T CON402 PITCH 2 00 10k ven pi 3 2 I GN201 vi vo vcc2 5 4 GND ON OFF R201 47K 1116W x a eo 2 DM c210 z c211 c212 TOT 3 4 Vec D201 SS14 ka SR 5 SET R212 47K 1 16W our ATuFI16V 0 1uF GND 9 10 EO Q201 onBACKLITE 6 E n 2 1 PMBS3904 4 vecsv T C202 C204 C20 C205 FR R203 De 220uF 25V 0 1uF 4K 118W 220uF 25V Brightness vcc3 3 aaa SA R204 iios mc err 10K 1 16W Vuosi A veca3 4 1 Q202 4 aajgackuite C Dwa TO 252 C206 EMEA A 1uF 0805 al U202 VAA v v vun vor ki T T L VAM A 1 JOI cats C216 VAA2 FR vecsy VLCD 0 1uF AIC1084 33CE 47uF 16V 0 1uF wes 5 Tuo s d VCCSV vcc3 3 R206 R208 T VAA3 4 10k ven 10k ven VAM R209 R210 Q203 JE 0 1 16W NC MU GE R207 4 7K 1 16W 1 0204 PMBS3904 6 onPanel 5V 3 3V R211 I 10uF 16V M 10K 1 16W 19
5. 5 1 6W 1 PCS R241 61L 60251352T 51KOHM 5 1 6W 1 PCS R236 61L 60262152T 620 OHM 5 1 6W 1 PCS R237 61L 60262152T 620 OHM 5 1 6W 1 PCS R234 61L 60291152T CFR 910 OHM 5 1 6W 1 PCS R235 61L 60291152T CFR 910 OHM 5 1 6W 1 PCS FB902 71L 5519 T FERRITE BEAD 9X3 5X0 8 1 PCS ZD902 93L 39 5452T ZENER HZ12B2 1 PCS ZD903 93L 39 7752T ZENER HZ5C1 1 PCS 48 EN7220 Service Manual D901 93L 6026T52T RECTIFIER DIODE FR107 1 PCS D902 93L 6038P52T PS102R 1 PCS D205 93L 64 1152T 1N4148 1 PCS D206 93L 64 1152T 1N4148 1 PCS D207 93L 64 1152T 1N4148 1 PCS D208 93L 64 1152T 1N4148 1 PCS D209 93L 64 1152T 1N4148 1 PCS D210 93L 64 1152T 1N4148 1 PCS D903 93L 64 1152T 1N4148 1 PCS IC903 56L 158 4 T HTL431 1 PCS Q902 57L419PP T 2PC945P 1 PCS Q901 57L420PP T 2PA733P 1 PCS C911 G4L700J1020AT 1000PF 50V PEN 1 PCS C204 64L700J1040AT 0 1UF 50V PEN 1 PCS C205 64L700J1040AT 0 1UF 50V PEN 1 PCS C206 G4L700J1040AT 0 1UF 50V PEN 1 PCS C909 G4L700J1040AT 0 1UF 50V PEN 1 PCS C936 G4L700J1040AT 0 1UF 50V PEN 1 PCS C221 G4L701J4740AT 0 47uF 50V 1 PCS C222 G4L701J4740AT 0 47uF 50V 1 PCS C208 65L 44233113T 330PJNPO 50V 1 PCS C908 65L 450104 7T 0 1UF 80 20 50V Y5V 1 PCS C920 65L517K102 5T6052 1000PF 10 Y5P 500V 0 PCS C921 65L517K102 5T6052 1000PF 10 Y5P 500V 0 PCS C920 65L517K102 5T6213 1000PF 10 Y5P 500V 1 PCS C921 65L517K102 5T6213 1000PF 10 Y5P 50
6. Parameter Symbol Condition Min Typ Max Unit Remark Horizontal 021 022 65 75 Deg 011 CR gt 10 55 65 Deg Vertical fees Viewing angle 012 50 60 Deg Note1 4 range Horizontal 021 922 85 Deg 011 CR gt 5 75 Deg Vertical 012 70 Deg Contrast ratio CR 0 0 300 450 Note2 4 Response time t 0 0 20 ms Rise time tr 4 ms Note3 4 Fall time td 16 ms Wx 0 283 10 313 0 343 Note4 Chromaticity of White CIE 1931 Wy 0 299 10 329 0 359 Rx 0 603 10 633 0 663 Chromaticity of Red CIE 1931 Ry 0 306 10 336 0 366 Chromaticitv of Green CIE 1931 Gx 0 270 0 300 0 330 EN7220 Service Manual Gy 0 556 0 586 0 616 Bx 0 116 0 146 10 176 Chromaticity of Blue CIE 1931 By 0 073 0 103 10 133 Lumi f whit IL 7 0 uminance of white YL 240 300 edis Note 4 Note 4 mArms White Uniformity W 1 25 1 33 Note5 Cross talk 1 50 Note6 4 4 3 Parameter Guide for CFL Inverter The backlight system is an edge lighting type with 2 CCFL Cold Cathode Fluorescent Lamp The characteristics of four lamps are shown in the following tables PARAMETER SYMBOL MIN TYP MAX UNIT REMARK Lamp current range IL 3 0 7 0 8 0 mArms Note Lamp voltage VL 725 Vrms Lamp power consumption PL 5 1 W Note2 IL 7 0mA Lamp frequency FL 52 kHz Note 1100 Vrms Ta 25C Established starting voltage Vs x Note4 1420 Vrms Ta 0C Lamp life time LL 40000 50000 hour
7. 1 PCS RN601 61L 125103 8 CHIP AR 8P4R 10KOHM 5 1 PCS RN602 61L125103 8 CHIP AR 8P4R 10KOHM 5 1 PCS FB301 61L0603000 CHIPR OOHM 5 1 10W 1 PCS FB302 61L0603000 CHIPR OOHM 5 1 10W 1 PCS FB303 61L0603000 CHIPR OOHM 5 1 10W 1 PCS R209 61L0603000 CHIPR OOHM 5 1 10W 1 PCS R502 61L0603000 CHIPR OOHM 5 1 10W 1 PCS R620 61L0603000 CHIPR OOHM 5 1 10W 1 PCS R621 61L0603000 CHIPR OOHM 5 1 10W 1 PCS R622 61L0603000 CHIPR OOHM 5 1 10W 1 PCS R623 61L0603000 CHIPR OOHM 5 1 10W 1 PCS 38 EN7220 Service Manual R624 6110603000 CHIPR OOHM 5 1 10W 1 PCS R301 61L0603101 CHIPR 100 OHM 5 1 10 1 PCS R302 61L0603101 CHIPR 100 OHM 5 1 10 1 PCS R303 61L0603101 CHIPR 100 OHM 5 1 10 1 PCS R305 61L0603101 CHIPR 100 OHM 5 1 10 1 PCS R306 61L0603101 CHIPR 100 OHM 5 1 10 1 PCS R307 61L0603101 CHIPR 100 OHM 5 1 10 1 PCS R309 61L0603101 CHIPR 100 OHM 5 1 10 1 PCS R312 61L0603101 CHIPR 100 OHM 5 1 10 1 PCS R315 61L0603101 CHIPR 100 OHM 5 1 10 1 PCS R316 61L0603101 CHIPR 100 OHM 5 1 10 1 PCS R608 61L0603101 CHIPR 100 OHM 5 1 10 1 PCS R609 6110603101 CHIPR 100 OHM 5 1 10 1 PCS R634 6110603101 CHIPR 100 OHM 5 1 10 1 PCS R635 6110603101 CHIPR 100 OHM 5 1 10 1 PCS R203 61L0603102 CHIPR 1K OHM 5 1 10W 1 PCS R310 6110603102 CHIPR 1K OHM 5 1 10W 1 PCS R311 6110603102 CHIPR
8. 7 1 Main Board 25 7 2 Inverter Power Board 26 7 3 Keypad Board e enn 26 8 Maintainability 27 8 1 Equipments and Tools Requirements _ 27 8 2 Trouble Shooting 28 8 2 1 Main Board ___________________ 28 8 2 2 Power Inverter Board 31 8 2 3 Key Pad Board mmm 33 9 White Balance Luminance Adjustment 34 10 EDID Content 35 11 BOM List pr 36 50 EN7220 Service Manual 1 MONITOR SPECIFICATIONS Driving system TFT Color LCD LCD Panel Size 43 2cm 17 0 Pixel pitch 0 264mm H x 0 264mm V H Frequeney B0kHz 80kHz V Frequency 55 75Hz Display Colors Over 16 million Colors Dot Clock 135MHz Max Resolution 1280 x 1024 Plug amp Play VESA DDC2B ON Mode lt 45W Power Consumption OFF Mode lt 3W Maximum Screen Size Horizontal 13 3 337 92mm Vertical 10 6 270 336mm Power Source 100 240VAC 47 63Hz Environmental Operating Temp 0 C to 40 C Considerations Stora
9. Note5 12 EN7220 Service Manual 5 Block Diagram 5 1 Monitor Exploded View EN7220 Service Manual 5 2 Software Flow Chart EN7220 Service Manual 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 12 Check the analog port are there any signals coming 13 Does the scalar send out a 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 disappear 17 Program the scalar to be able to show the coming mode 18 Process the OSD display 19 Read the keyboard Is the power key pressed 15 EN7220 Service Manual 5 3 Electrical Block Diagram 5 3 1 Main Board LCD Interface MCU W78165 SCALAR MST8011A Include ASD OSD EPR SDA OSD Control EPR ALL beian EEPROM Crystal 24C16 1431818 Connector MHz DB15 SDA DB15 SCL EEPROMe 24C02 16 EN7220 Service Manual 5 3 2 Inverter Power Board Inverter Block Diagram Parallet resonant Vin g Buck Connector invetter Dimmin
10. 00 81 8 01 01 01 01 01 01 01 01 48 01 01 01 01 01 01 30 2A 00 98 51 00 2A 40 30 70 64 13 00 78 2D 11 00 00 1E 00 00 00 FF 00 31 32 33 80 34 35 36 37 38 39 30 31 32 33 00 00 00 FD OO 37 96 AB 1E 53 OE 00 OA 20 20 20 20 20 20 00 00 00 FC 112 00 45 4E 37 32 32 30 0A 20 20 20 20 20 20 00 17 Note Byte OC OD OE OF means Serial No Byte 10 11 means Manufacture Time Byte 7F means checksum 35 EN7220 Service Manual 11 BOM LIST T782KQXNK6E1N g FRE Gan ma s CBPC780KQXEN CONVERSION BOARD 1 PCS KEPC780KB8 KEY BOARD FOR T780K 1 PCS PWPC7425A3E 1 POWER BOARD 1 PCS 7L 134 WOODEN PALLET 0 01 PCS 7L 135 WOODEN PALLET 0 01 PCS 11L6038 2 CABLE HOOK 1 PCS 15L5851503 MAIN FRAME 11 PCS 15L5908 1 BRACKET 1 PCS 19L6006 1 STAND CLIP 1 PCS 26L 800673 1A ENVISION BARCODE LABEL 1 PCS 33L4651 GM L BUTTON FUNCTION 1 PCS 33L4652 1 LENS POWER 11 PCS 33L4654 GM L COVER 1 PCS 33L4678 GN X UTILITY CUP R L 2 PCS 33L4679GM X CLIP 2 PCS 34L1197AGN L BEZEL 1 PCS 34L1198AGM 2L REAR COVER 1 PCS 40L 154501 1 HI POT GND LABEL FOR MO 1 PCS 40L 190673 4A ID LABEL 1 PCS 40L 459673 1A BARBETTE LABEL 1 PCS 40L 459673 2A FRONT LABEL FOR En7220 1 PCS 40L 459673 3A Gk ibaie 1 PCS En7220 40L 459673 4A BASE LABEL FOR En7220 1 PCS 40L 459786 5A CANTION LABEL FOR AL 172 1 PCS WEG FOR 40L 581 26704 CARTON PALLET 0 01 PCS 41L 68508 A
11. 3 R201 R202 1 30K 40K 1 Ea d REM POWER XFMR D209 R208 1N4148 ATK 1H6WQ R210 15K A 0205 1N4148 ki R205 Sa 7 AK c209 D207 R234 FE 1 turzsv 1N4148 sto 1 4W C205 14 T IA L I R238 l 12K R236 620 nt an d d A d ad rear d R207 bazte hr 10uF OPEN bs ZEEZSS a SRA 0204 SM431DY T1 t A x o b a Um L202 FEES dE en 0217 O k lt 5 munan T T T 22pFISKV C206 OtuF o qs N 4 ka if L IL Y gt 0224 R231 11 1uF 25V D202 2K c218 3 R208 SR24 PT202 22pFI3KV 4 am 5 9 CN201 T A 1uF 25V C212 2 1uF 25V 6 C208 R204 28C5706 330pF 10K Pr 3 R209 1 ATK 1 16W R219 POWER XFMR F F 470 jl D210 1N414 R203 10K A D206 R211 1N4148 15K E D208 R235 SZ 1N4148 910 1 4 de R239 AOC Top Victory Electronics Co Ltd 12K R237 620 is power GND Me i D EZE ji B a Document Number P lt is signal GND A ate Friday July 25 2003 Bheet 2 o 2 23 6 3 Key Pad Board SA U3E 3 LED ORANGE gt gt it AT d 74LCX14 N U3F 3 LED GRN N 18 5502 TALOX14 N R90 R91 0 116W 0 1 16W z ol l e a a E E ONO LED GRN LED ORG KEY AUTO 1 2 KEY MENU KEY RIGHT 3 4 KEY LEFT KEY ONOFF 5 6 Y B WAFER 8P2 0 DUAL R A 23788 os Ou O Ou 5 8 5 5 3 e e 8 3 3 83 S GND GND Qoo w SOT 23 3V3 rr R94 RP2 10K 1716W 10K RP3 1 8 KE
12. 32 EN7220 Service Manual 8 2 3 Key Pad Board OSD is unstable or not working Is KeyPad Board connecting normally 2 Connect KeyPad Replace Button Is Button Switch normally Switch N Replace KeyPad Is KeyPad Board Normally Board l Y Check Main Board 33 EN7220 Service Manual 9 White Balance Luminance adjustment Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment Before started adjust white balance please setting the Chroma 7120 MEM channel 1 to 6500 color MEM channel 2 to 7800 color our 6500 parameter is x 313 10 y 329 10 Y 200 10 cd m 7200 parameter is x 296 10 y 311 10 Y 200 10 cd m How to setting MEM channel you can reference to chroma 7120 user guide or simple use SC key and NEXT key to modify xyY value and use ID key to modify the TEXT description Following is the procedure to do white balance adjust Press MENU button during 2 seconds along with press Power button will activate the factory mode then MCU will do AUTO LEVEL automatically Meanwhile press MENU the OSD screen will located at left top of panel I Bias adjustment 1 Setthe contrast D to 70 2 Sdjust the Brightness 0 to 90 Il Gain adjustment Move cursor to Factorv and press MENU key a Adjust 6500 color temperature 1 Switch the chroma 7120 to RGB mode with press MODE button 2 switch the MEM Channel to
13. 61L1206101 CHIP 100 OHM 5 1 4W 1 PCS R915 6111206103 CHIP 10KOHM 5 1 4W 1 PCS R901 6111206105 CHIP 1MOHM 5 1 4W 1 PCS R902 61L1206105 CHIP 1MOHM 5 1 4W 1 PCS R904 61L1206105 CHIP 1MOHM 5 1 4W 1 PCS R905 61L1206105 CHIP 1MOHM 5 1 4W 1 PCS R224 61L1206152 CHIPR 1 5K OHM 5 1 4W 1 PCS R225 61L1206152 CHIPR 1 5K OHM 5 1 4W 1 PCS R226 61L1206152 CHIPR 1 5K OHM 5 1 4W 1 PCS R227 61L1206152 CHIPR 1 5K OHM 5 1 4W 1 PCS R228 61L1206152 CHIPR 1 5K OHM 5 1 4W 1 PCS R229 61L1206152 CHIPR 1 5K OHM 5 1 4W 1 PCS R230 61L1206152 CHIPR 1 5K OHM 5 1 4W 1 PCS R231 61L1206152 CHIPR 1 5K OHM 5 1 4W 1 PCS R916 61L1206240 2F CHIP 24KOHM1 1 4W 1 PCS R909 61L1206472 CHIP 4 7KOHM 5 1 4W 1 PCS R910 61L1206472 CHIP 4 7KOHM 5 1 4W 1 PCS R911 61L1206472 CHIP 4 7KOHM 5 1 4W 1 PCS R906 61L1206754 CHIP 750KOHM 5 1 4W 1 PCS R907 61L1206754 CHIP 750KOHM 5 1 4W 1 PCS C910 65L0805104 32 CHIP 0 1UF 50V X7R 1 PCS C927 65L0805104 32 CHIP 0 1UF 50V X7R 1 PCS C203 65L0805105 27 CHIP 1UF 25V Y5V 0805 1 PCS C209 65L0805105 27 CHIP 1UF 25V Y5V 0805 1 PCS C210 65L0805105 27 CHIP 1UF 25V Y5V 0805 1 PCS C211 65L0805105 27 CHIP 1UF 25V Y5V 0805 1 PCS C212 65L0805105 27 CHIP 1UF 25V Y5V 0805 1 PCS C219 65L0805105 27 CHIP 1UF 25V Y5V 0805 1 PCS C220 65L0805105 27 CHIP 1UF 25V Y5V 0805 1 PCS C224 65L0805105 27 CHIP 1UF 25V Y5V 0805 1 PCS C225 65L0805105 27 CHIP 1UF 25V Y5V 0805 1 PCS D203 93L 39S 3 T BZT52 C11 1 PCS D204 93L 39S 3 T BZT52 C11 1 PCS D203 93L 39S 8 T
14. 7 0 mA FOR 1 LOAD Frequency F 50 0 55 0 60 0 KHZ FOR 1 LOAD H V open Vopen 4450 4600 1750 Vrms NOLOAD H V Load Vload 710 810 910 Vrms RL 120KQ Start voltage Vst 1650 1750 1850 Vrms RL CCFL Protect delay time PDT 0 4 1 4 Sec ITEM SYMBOL MIN TYP MAX UNIT REMARK Input voltage Vin 108 12 132 V Input current lin 660 750 mA FOR 4 LOAD Output Current lout 3 0 3 5 4 0 mA FOR 1 LOAD TRANS F 50 0 550 600 KHz FORTLOAD H V open Vopen 4450 1600 1750 Vrms INO LOAD Start voltage Vst 4650 1750 1850 Vrms RL CCFL H V Load Vioad 350 450 550 Vrms RL 120KQ 10 4 4 Panel Specification QDI LO7 4 4 1 Displav Characteristics EN7220 Service Manual PARAMETER SPECIFICATION UNIT Displav Size 43 17 Diagonal cm Active area 337 9 H x 270 3 V mm 1280 H x 1024 V pixel Pixel format 1 Pixel R G B dots Pixel pitch 0 264 H x 0 264 V mm Pixel configuration R G B vertical stripe Display mode Normally White Unit outline dimensions typ 1 358 5 x 296 5x 16 5 mm weight 1970 Max g Sis treatment Anti glare and hard coating 3H Low reflection 5 Lamp Quantity 4 pcs 4 4 2 Optical Characteristics The optical characteristics are measured under stable conditions at 25 C Room Temperature 11
15. Channel 01 with up or down arrow on chroma 7120 3 The LCD indicator on chroma 7120 will show x 313 10 y 329 10 Y 200 5 cd m 4 Adjust the RED on OSD window until chroma 7120 indicator reached the value R 100 5 adjust the GREEN on OSD until chroma 7120 indicator reached G 100 6 adjust the BLUE on OSD until chroma 7120 indicator reached B 100 7 repeat above procedure item 5 6 7 until chroma 7120 RGB value meet the tolerance 100 2 8 Press Exit on OSD window to save the adjustment result 34 EN7220 Service Manual b Adjust 7800 color temperature 9 Switch the chroma 7120 to RGB mode with press MODE button 10 switch the MEM channel to Channel 02 with up or down arrow on chroma 7120 11 The LCD indicator on chroma 7120 will show x 296 10 y 311 10 Y 200 5 cd m 12 Adjust the RED on OSD window until chroma 7120 indicator reached the value R 100 13 adjust the GREEN on OSD until chroma 7120 indicator reached G 100 14 adjust the BLUE on OSD until chroma 7120 indicator reached B 100 15 repeat above procedure item 5 6 7 until chroma 7120 RGB value meet the tolerance 100 2 16 Press Exit on OSD window to save the adjustment result Turn the POWER button off to on to quit from factory mode 10 EDIT Content D SUB Connector Analog xO x1 x2 x3 x4 x5 x6 x7 x8 x9 xA xB XC xD XE XF 00 00 FF FF FF FF FF FF 00 16 09 84 E7 OB 95 OD 00 16 1F OD 01 03 68 22 1B 8A 2A BE 30 A6 51 4C 99 27 32 1B 50 54 BF EF
16. HAR 0 1 PCS 411780061513B NE NOTS OR 1 PCS CARD 411780067319B QSG 1 PCS 411780067324A Envision Envelop 1 PCS 411780067329A WARRANTY CARD 1 PCS 411780067330B Envision kensington Ca 1 PCS 411780067331B WARRANTY CARD 1 PCS 4413231 15 EVA WASHER 2 PCS 44L3718673 1D CARTON 1 PCS 36 EN7220 Service Manual 4413725 1 EPS L 1 PCS 4413725 2 EPS R 1 PCS 4419003 1 CORNER PAPER 0 08 PCS 45L 7628 C PE Bag For Manual 1 PCS 45L 7631 C PE BAG FOR BASE 1 PCS 45L 77 3 H R 173 CM 45L 77500 BARCODE RIBBON 19 CM 45L 77501 BARCODE RIBBON 0 5 CM 45L 88607 PE BAG FOR MONITOR 1 PCS 45L 88609 B EPE COVER 1 PCS 45L 88621 4 PE BAY FOR LIFT 1 PCS 50L 600 2 HANDLE1 1 PCS 50L 600 A HANDLE2 1 PCS 52L 1150 C Filler WHITE TAPE 10 CM 52L 1185 MIDDLE TAPE FOR CARTON 92 CM 52L 1186 SMALL TAPE 8 CM 52L 1207 A ALUMINIUM TAPE 2 PCS 52L 1208 A ALUMINIUM TAPE 2 PCS 52L6020 1 PROTECT FILM 0 PCS 52L6025 11587 MYLAR 138X144 1 PCS 52L6025 11588 MYLAR 120X100 1 PCS 70L1700673 1D CD MANUAL 1 PCS 85L 635502 MAIN SHIELD 1 PCS 89L1735GAA D1 SIGNAL CABLE 1 PCS 89L402A18N IS POWER CORD 1 PCS 95L8018 30 26 HARNESS 110MM 24P 30P 1 PCS 95L8021 12 1 HARNESS 12P 60mm 1 PCS M1L 140 10120 SCREW M4X10 4 PCS M1L 330 4128 SCREW M3X4 1 PCS M1L1130 6128 SCREW 4 PCS M1L1130 6128 SCREW 4 PCS M
17. ZD RLZ11B ROHM 0 PCS D204 93L 39S 8 T ZD RLZ11B ROHM 0 PCS ZD904 93L 395 16 T SML4737A 1 0 PCS ZD904 93L 395 19 T PTZ7 5B 1 PCS 46 EN7220 Service Manual ZD901 93L 39520 T RLZ22B BV ROHM 1 PCS D201 93L2004 1 SMAL240LVXRO SMT 0 PCS D202 93L2004 1 SMAL240LVXRO SMT 0 PCS D201 93L2004 3 SSM24 0 PCS D202 93L2004 3 SSM24 0 PCS D201 93L2004 2A SR34 PAN JIT 0 PCS D202 93L2004 2A SR34 PAN JIT 0 PCS D201 9313004 1 SMAL340XXXRO 3A 40V 0 PCS SMA D202 9313004 1 SMAL340XXXRO 3A 40V o PCS SMA D201 93L3004 2 SR34 PAN JIT 1 PCS D202 93L3004 2 SR34 PAN JIT 1 PCS PARE POWER BOARD PWPC7425A3E1AI PT201 6L 31502 1 5MM RIVET 2 PCS PT202 6L 31502 1 5MM RIVET 2 PCS 715L1103 D PCB 1 PCS FB903 95L 9023 TIN COATED 0 PCS J201 95L 9023 TIN COATED 0 PCS J202 95L 9023 TIN COATED 0 PCS J203 95L 9023 TIN COATED 0 PCS J204 95L 9023 TIN COATED 0 PCS J205 95L 9023 TIN COATED 0 PCS J206 95L 9023 TIN COATED 0 PCS J207 95L 9023 TIN COATED 0 PCS J208 95L 9023 TIN COATED 0 PCS J209 95L 9023 TIN COATED 0 PCS J210 95L 9023 TIN COATED 0 PCS J211 95L 9023 TIN COATED 0 PCS J212 95L 9023 TIN COATED 0 PCS J901 95L 90 23 TIN COATED 0 PCS J902 95L 90 23 TIN COATED 0 PCS J903 95L 90 23 TIN COATED 0 PCS J904 95L 90 23 TIN COATED 0 PCS J905 95L 9023 TIN COATED 0 PCS J906 95L 9023 TIN COATED 0 PCS J907
18. 00 060Hz 1056 x 628 37 879 P 60 317 P 40 000 800x600 72Hz 1040 x 666 48 077 P 72 188 P 50 000 800x600 75Hz 1056x625 46 875 P 75 000 P 49 500 1024x768 60Hz 1344x806 48 363 N 60 004 N 65 000 1024x768 60Hz 1312x813 48 78 N 60 00 N 64 000 XGA 1024x768 70Hz 1328x806 56 476 N 70 069 N 75 000 1024x768 72Hz 1304x798 57 515 P 72 074 P 75 000 1024x768Q75Hz 1328x804 60 200 N 74 90 N 80 000 1024x768 75Hz 1312x800 60 023 P 75 029 P 78 750 XGA 1152x864 75Hz 1600x900 67 50 P 75 000 P 108 000 SXGA 1280x1024 60Hz 1688x1066 63 981 P 60 020 P 108 000 1280x1024 75Hz 1688x1066 79 976 P 75 025 P 135 000 IBM MODES Horizontal Vertical Nominal Frequenc Nominal orina Mode Resolution Total y me Freq idi Side Polarity Polarity Clock 1 Hz MHz 0 5kHZ DOS 720x400 70Hz 900 x 449 31 469 N 70 087 P 28 322 DOS 640x400 70Hz 800 x 449 31 469 N 70 087 P 25 175 MAC MODES VGA 640x480 67Hz 864x525 35 000 N 66 667 N 30 240 SVGA 832x624 75Hz 1152x667 49 725 N 74 551 N 57 2832 EN7220 Service Manual 4 3 Power Supply Requirements 4 3 1 Input Requirements INVERTER MAX BRINGTHNESS Vadj 5 0v LOAD 120KOX4 ROOM TEMPERATURE 25 4 C 4 3 2 Output Requirements INVERTER MIN BRINGTHNESS Vadj 0 0v LOAD 120KOX4 ROOM TEMPERATURE 25 4 C ITEM SYMBOL MIN TYP MAX UNIT REMARK Input voltage San 10 8 12 13 2 V Input current lin 2250 2500 mA FOR4LOAD Output Current lout 6 0 6 5
19. 0V 1 PCS C920 65L517K102 5T6285 1000PF 10 Y5P 500V 0 PCS C921 65L517K102 516285 1000PF 10 Y5P 500V 0 PCS C907 67L 305220 7T 22UF 20 50V 1 PCS C207 67L 305479 7T 4 7 UF 20 50V 105 1 PCS C924 67L215B4713HT 470UF 16V LTRA71M1CF11V 1 PCS C926 67L215B4713HT 470UF 16V LTRA71M1CF11V 1 PCS C201 67L215C1514HT LOW ESR 150UF 25V 8 7MM 1 PCS C223 67L215C1514HT LOW ESR 150UF 25V 8 7MM 1 PCS PARE NT NO 705L 780 57 01 Q903 ASS Y 51L 200 1 BEN 0 02 G Q903 57L 723 3B 2SK2761 01MR 0 PCS Q903 57L 724 A 2SK2996 0 PCS 49 EN7220 Service Manual Q903 57L 724 4A STP9NK60ZFP 1 PCS 90L 407 2 HEAT SINK 1 PCS M1L1730 8128 SCREW M3x8 1 PCS PARE NT NO 705L 780 57 02 CN901 ASS Y CN901 87L 501 12 CJ AC SOCKET 1 PCS CN901 87L 501 12 RF AC SOCKET 0 PCS 95L2055354022 HARNESS 1 PCS 96L 29 6 SHRINK TUBE UL CSA 20 MM PARE NT NO 705L 780 57 15 D910 D912 ASS Y 90L6064 1 HEAT SINK 1 PCS D910 93L 60217 FMB 29L 1 PCS D910 93L 60224 FCH10A10 0 PCS D912 93L 60235 FCQ10A06 F10P06Q 1 PCS D912 93L 60236 FMB 26L 0 PCS M1L1730 8128 SCREW M3x8 2 PCS PARE NT NO 705L782KB34072 BACK COVER ASS Y 5L6012 1 LIFT RUBBER 1 PCS 12L 394 3 FOOT PORON 7 PCS 15L6069 1 BASE BRACKET 1 PCS 19L 573 1 SPRING 1 PCS 33L4647 GM L COVER TILT 1 PCS 33L4648 GM L COVER STAND 1 PCS 33L4650
20. 1 Q903 ASS Y 1 PCS 705L 780 57 02 CN901 ASS Y 1 PCS 705L 780 57 15 D910 D912 ASS Y 1 PCS saggi SNO POWRE BOARD FOR SMT PW7425A3E1SMT 0203 56L 566 10 SI4431DY T1 SMT 0 PCS 0204 56L 566 10 SI4431DY T1 SMT 0 PCS U201 156L622 1 BA9741F SMT 1 Pcs 0203 56L763 4 RSS050P03 0 PCS 0204 56L763 4 RSS050P03 0 PCS 0205 57L417 4 PMBS3904 PHILIPS SMT 04 1 PCS 0206 57L417 4 PMBS3904 PHILIPS SMT 04 1 PCS Q207 57L417 6 PMBS3906 PHILIPS SMT 06 1 PCS 0208 57L417 6 PMBS3906 PHILIPS SMT 06 1 PCS Q202 57L760 4 A A 1 PCS SMT 7 0201 57L760 5 PTS URN 1 PCS SMT 8 0203 57L763 3 AO4411 SO 8 BY AOS SMT 1 PCS Q204 157L763 3 AO4411 SO 8 BY AOS SMT 1 PCS R929 6110603000 CHIPR OOHM 5 1 10W 1 PCS R931 61L0603102 CHIPR 1K OHM 5 1 10W 1 PCS R216 6110603221 CHIPR 220 OHM 5 1 10W 1 Pcs R217 6110603221 CHIPR 220 OHM 5 1 10W 1 Pcs R925 6110603362 CHIP 3 6K OHM 1 10W 1 PCs R212 6110603392 CHIP 3 9K OHM 1 10W 1 Pcs R213 61L0603392 CHIP 3 9K OHM 1 10W 1 PCS R927 6110805102 CHIPR 1K OHM 5 1 8W 1 PCS R928 61L0805102 CHIPR 1K OHM 5 1 8W 1 PCS R926 61L0805242 CHIP 2 4KOHM 1 1 8W 1 PCS R924 61L0805333 CHIP 33KOHM 1 1 8W 1 PCS 45 EN7220 Service Manual R208 61LO805472 CHIRP 4 7K OHM 5 1 8 1 PCS R209 6110805472 CHIRP 4 7K OHM 5 1 8 1 PCS R912 61L1206101 CHIP 100 OHM 5 1 4W 1 PCS R930
21. 1 X HOLDER SPRING 1 PCS 34L1194GM L STAND 1 PCS 34L1195 GM L STAND LIFT 1 PCS 34L1201GM L BASE 1 PCS 37L477 1 HINGE ASSY 1 PCS 51L 200500 TTE 2 G M1L 330 647 SCREW 3X6mm 2 PCS Q1L 130 8120 SCREW 3mmX8 7 PCS Q1L 130 12120 SCREW 3MMX12 4 PCS Q1L 130 12120 SCREW 3MMX12 2 PCS W33L4646 GM L COVER LIFT 1 PCS W33L4649 GM T HOLDER LIFT 1 PCS 50
22. 1K OHM 5 1 10W 1 PCS R202 61L0603103 CHIPR 10K OHM 5 1 10 1 PCS R204 6110603103 CHIPR 10K OHM 5 1 10 1 PCS R206 6110603103 CHIPR 10K OHM 5 1 10 1 PCS R208 61L0603103 CHIPR 10K OHM 5 1 10 1 PCS R211 61L0603103 CHIPR 10K OHM 5 1 10 1 PCS R308 61L0603103 CHIPR 10K OHM 5 1 10 1 PCS R314 6110603103 CHIPR 10K OHM 5 1 10 1 PCS R317 6110603103 CHIPR 10K OHM 5 1 10 1 PCS R318 61L0603103 CHIPR 10K OHM 5 1 10 1 PCS R601 6110603103 CHIPR 10K OHM 5 1 10 1 PCS R602 6110603103 CHIPR 10K OHM 5 1 10 1 PCS R603 6110603103 CHIPR 10K OHM 5 1 10 1 PCS R604 6110603103 CHIPR 10K OHM 5 1 10 1 PCS R605 6110603103 CHIPR 10K OHM 5 1 10 1 PCS R606 6110603103 CHIPR 10K OHM 5 1 10 1 PCS R607 6110603103 CHIPR 10K OHM 5 1 10 1 PCS R613 6110603103 CHIPR 10K OHM 5 1 10 1 PCS R614 6110603103 CHIPR 10K OHM 5 1 10 1 PCS R615 6110603103 CHIPR 10K OHM 5 1 10 1 PCS R313 6110603222 CHIPR 2 2K OHM 5 1 10 1 PCS R403 61L0603390 OF CHIP 390 OHM 1 10W 1 1 PCS R304 6110603471 CHIPR 470 OHM 5 1 10W 1 PCS 39 EN7220 Service Manual R617 6110603471 CHIPR 470 OHM 5 1 10W 1 PCS R618 61LO603471 CHIPR 470 OHM 5 1 10W 1 PCS R628 61LO603471 CHIPR 470 OHM 5 1 10W 1 PCS R201 61L0603472 CHIPR 4 7K OHM 5 1 1 1 PCS R205 61L0603472 CHIPR 4 7K OHM 5 1 1 1 PCS R207 61L0603472 CHIPR 4 7K OHM 5 1 1 1 PCS R212 61L060347
23. 1L1140 6128 SCREW 4X6 1 PCS M1L1730 6128 SCREW M3x6 4 PCS Q1L1030 8120 SCREW 3X8 NI 6 PCS Q1L1030 8120 SCREW 3X8 NI 3 PCS 750LLQ70L07 QDI 17 PANEL 1 PCS W33L4653 GM L VESA COVER 1 PCS 705L782KB34072 BACK COVER ASS Y 1 PCS PARE NT NO CONVERSION BOARD 37 EN7220 Service Manual CBPC780KQXEN AIC780KQXEN MAIN BOARD 1 PCS CN201 33L800912K H 2 6PIN DUAL ROW RIGHT 1 PCS CN503 33L801724A H PIN HEADER 24P 2 0mm 1 PCS CN602 33L8027 16 WAFER 16PIN 2 0mm DIP 1 PCS 40L 457624 1B CPU LABEL 1 PCS 40L 45762412A CBPC LABEL 1 PCS 44L3231508505 SENT 1 PCS U601 56L1125137QT3 W78E65P 40 BY WINBOND 1 PCS C202 67L215B221 4H LOW ESR 220UF 25V 8 11 1 PCS C204 67L215B221 4H LOW ESR 220UF 25V 8 11 1 PCS CN301 88L 35315FHAS D SUB 15PIN 1 PCS X401 93L 2253 e 1 PCS 14 318MHZHC 49U X601 93L 2255 H 20MHZ 1 PCS X601 93L 2255 J 20MHZ 0 PCS U401 56L 562 49 MST8111A PQFP 128 1 PCS U202 56L 563 21 AP1084K33 1 PCS U201 56L 585 5A AP1117E25A 1 PCS U301 56L1133 34 M24C02 WMN6T SMT 1 PCS U602 56L1133516 M24C16 WMN6T 1 PCS Q201 57L417 4 PMBS3904 PHILIPS SMT 04 1 PCS Q202 57L417 4 PMBS3904 PHILIPS SMT 04 1 PCS Q204 57L417 4 PMBS3904 PHILIPS SMT 04 1 PCS Q601 57L417 6 PMBS3906 PHILIPS SMT 06 1 PCS Q602 57L417 6 PMBS3906 PHILIPS SMT 06 1 PCS Q603 57L417 6 PMBS3906 PHILIPS SMT 06 1 PCS Q203 57L 763 1 A03401 SOT23 BY AOS A1
24. 1uF 250V ad cite BEAD Il P901A NC R918 RA F SZ RZ 20K 1 4W R901 R902 A R915 20902 A 70903 1M 16W 1M 146W TK tw A R919 HZ12B2 HZ5C1 can d 0 39 2W TTT WireHamess 0 001uF R914 gt SZ N C 0603 NR901 T NTCR E o w sag EEE R931 t 123FY24P 4K 16W R909 ATK en q R927 1K Aw j ii T D903 F901 W 184148 FUSE R924 R925 20901 0909 R910 C936 R929 33K JAW 36K 1 4W C901 C902 RLZ20B a 47K UEN 0 1uF JUMPER 001uF 250V 0 001uF 250V R913 N C 0603 W L L R928 R912 EO 1K Wu 400 4116W 2PA733P 10903 mus hi T L d y a902 ha 2PC945P 085 R926 c910 R911 0 01uF 24K 114W Ia 47k UEN 2 1 Lee 11 TIT RZ N SZ D n Title OrgName ze Document Number er B pwpc7425B3 1 ate hei 1 SZ 22 0203 S14431DY T1 EN7220 Service Manual C215 22pF 3KV HEI PRA ai 2 E 0 43 D201 8 94 C201 223 0202 0202 SR24 anew Z C216 CN202 150uF 25V 150uF 25V 0 1UF 25V DTA144WKA PT201 22pF 3KV N 5 9 A E 0201 R216 C211 2 NOIOFF DTC144WKA 220 1 16W 1uF 25v 0210 6 2805706
25. 2 6 al 1 1 3shield eld 3 D314 D315 D316 C314 R323 44 R324 315 SG x ne we cik shield HZ S Ne NG PS PS E vec ms SS we A DATO 15 B 4 Sl sc m DATO 5 T B 4 1 SDA GND DATI g dA G 4 DATI 7 T G 4 a DAT2 4 T R 4 DAT2 Hiz R 4 DAT3 den DAT3 0 DAT4 0 DAT4 70 DATS 52 DATS 50 clk 24 1 CLK 4 clk C A NC 309 p310 D311 b312 bara c N N N Ne 20 W W LI 0 W Lo CO W CO www 0 w www o9ooo VAD VPLIVDVI VDPLL VPO VDD RIN GNDR GIN GNDG SOG BIN GNDB HSYNC VSYNC C40 0 1uE 67 csz 59 SCL n SDA 20 HWRESET 2 INT AdjBACKLITE 3 Volume C402 22pF 33 35 45 51 AVDD_PLL 0 AVDD MPLL AVDD DVI AVDD DVI DDC1 CLK GPO8 DDC1 DAT GPO7 REFP MST8111B REFM CSZ SCL SDA HWRESETZ INT PWMO PWM1 AN XOUT BYPASS AVSS LPLL AVSS MPLL AVSS PLL AVSS_DVI AVSS_DVI AVSS_DVI LVA3M LVACKP LVACKM LVA2P LVA2M LVA1P LVA1M LVAOP LVAOM NC LVB3P NC LVB3M NC LVBCKP NC LVBCKM NC LVB2P NC LVB2M NC LVB1P NC LVB1M NC LVBOP NC LVBOM ADO NC AD1 NC AD2 NC AD3 NC BUS TYPE NC 4 PA 0 9 4 PB 0 9 EN7220 Service Manual
26. 2 CHIPR 4 7K OHM 5 1 1 1 PCS R616 61L0603472 CHIPR 4 7K OHM 5 1 1 1 PCS R619 61L0603472 CHIPR 4 7K OHM 5 1 1 1 PCS R629 61L0603472 CHIPR 4 7K OHM 5 1 1 1 PCS R325 61L0603750 CHIPR 75 OHM 5 1 10W 1 PCS R326 61L0603750 CHIPR 75 OHM 5 1 10W 1 PCS R327 61L0603750 CHIPR 75 OHM 5 1 10W 1 PCS C307 65L0603102 32 1000PF 10 50V X7R 1 PCS C606 65L0603102 32 1000PF 10 50V X7R 1 PCS C607 65L0603102 32 1000PF 10 50V X7R 1 PCS C608 65L0603102 32 1000PF 10 50V X7R 1 PCS C609 65L0603102 32 1000PF 10 50V X7R 1 PCS C610 6510603102 32 1000PF 10 50V X7R 1 PCS C201 6510603104 32 CHIP 0 1UF 50V X7R 1 PCS C203 6510603104 32 CHIP 0 1UF 50V X7R 1 PCS C205 6510603104 32 CHIP 0 1UF 50V X7R 1 PCS C207 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C210 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C212 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C214 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C216 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C313 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C401 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C404 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C406 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C407 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C408 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C409 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C410 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C411 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C412 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C413 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C415 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C416 6
27. 3H 1000UF 20 16V 1 PCS C922 67L 215102 3K 1000UF 20 16V 0 PCS C925 67L 215102 3K 1000UF 20 16V 0 PCS C905 67L305S10114H 100UF 20 400V 1 PCS FB901 71L 55 29 FERRITE BEAD 1 PCS L902 73L 174 26 LS COMMON CHOKE 0 PCS L902 73L 174 26 T1 LINE LILTER 0 45mm 1 PCS L203 73L 17430 H FILTER 500MH HA 0 PCS L204 73L 17430 H FILTER 500MH HA 0 PCS L203 73L 174 30 LS FILTER 0 PCS L204 73L 174 30 LS FILTER 0 PCS L203 73L 174 30 YS FILTER 1 PCS L204 73L 174 30 YS FILTER 1 PCS L903 TAL 25591 E CHOKE BY LI TA 1 PCS L904 73L 25391 L CHOKE BY LI TA 1 PCS L903 73L 253 91 LS CHOKE BY LI SHIN 0 PCS L904 73L 253 91 LS CHOKE BY LI SHIN 0 PCS L201 73L 253139 LL CHOKE COIL 1 PCS L202 73L 253139 LL CHOKE COIL 1 PCS L201 73L 253139 YL CHOKE 0 PCS L202 73L 253139 YL CHOKE 0 PCS L201 73L 253139LSL CHOKE COIL 0 PCS L202 73L 253139LSL CHOKE COIL 0 PCS PT201 80LL15T 7DN X FMR 0 PCS PT202 80LL15T 7 DN X FMR 0 PCS PT201 80LL15T 7 YS X FMR 1 PCS PT202 80LL15T 7 YS X FMR 1 PCS 44 EN7220 Service Manual T901 soLL17T 2 L ADAPTOR BY LITAI 0 PCS T901 soLL17T 2 T X FMR 1 PCS T901 80LL17T 2LS ADAPTOR BY LISHIN 0 PCS F901 84L 53 1 FUSE 2A 250V LF 230002 1 PCS F901 84L 7H200 NL FUSE 2Z 250V HL 50T 2A 0 PCS F901 84L 7H200 SL 250V 2A LIHEL FUSE 0 PCS BD901 93L 50460 8 BRIDGE 2KBPO6M2A600V 1 PCS 705L 780 57 0
28. 5L0603104 32 CHIP 0 1UF 50V X7R 1 PCS 40 EN7220 Service Manual C417 65LO603104 32 CHIP 0 1UF 50V X7R 1 PCS C418 65LO603104 32 CHIP 0 1UF 50V X7R 1 PCS C420 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C421 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C423 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C425 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C426 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C428 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C510 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C511 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C601 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C605 65L0603104 32 CHIP 0 1UF 50V X7R 1 PCS C402 65L0603220 31 CHIP 22PF 50V NPO 1 PCS C403 65L0603220 31 CHIP 22PF 50V NPO 1 PCS C602 65L0603220 31 CHIP 22PF 50V NPO 1 PCS C604 65L0603220 31 CHIP 22PF 50V NPO 1 PCS C312 65L0603221 31 CAP CER 220PF 5 50V SM 1 PCS C311 65L0603330 31 33PF 5 50V NPO 1 PCS C304 65L0603473 32 CHIP 0 047UF 50V X7R 1 PCS C305 65L0603473 32 CHIP 0 047UF 50V X7R 1 PCS C306 65L0603473 32 CHIP 0 047UF 50V X7R 1 PCS C308 65L0603473 32 CHIP 0 047UF 50V X7R 1 PCS C309 65L0603473 32 CHIP 0 047UF 50V X7R 1 PCS C310 65L0603473 32 CHIP 0 047UF 50V X7R 1 PCS C206 6510805105 22 CHIP 1UF 25V X7R 0805 1 PCS C208 67L 312100 3 SMD 10uf 20 16V 1 PCS C405 67L 312100 3 SMD 10uf 20 16V 1 PCS C414 67L 312100 3 SMD 10uf 20 16V 1 PCS C419 67L 312100 3 SMD 10uf 20 1
29. 6V 1 PCS C422 G7L 312100 3 SMD 10uf 20 16V 1 PCS C424 67L 312100 3 SMD 10uf 20 16V 1 PCS C427 G7L 312100 3 SMD 10uf 20 16V 1 PCS C603 G7L 312100 3 SMD 10uf 20 16V 1 PCS C509 67L 312220 3 SMD 22UF 20 16V 1 PCS C211 67L 312470 3 SMD 47UF 20 16V 1 PCS C215 67L 312470 3 SMD 47UF 20 16V 1 PCS FB304 71L 566151 CHIP BEAD 150 OHM 1 PCS FB201 71L 56Z601 CHIP BEAD 600 OHM 0805 1 PCS FB401 71L 562601 CHIP BEAD 600 OHM 0805 1 PCS FB402 71L 562601 CHIP BEAD 600 OHM 0805 1 PCS 4 EN7220 Service Manual FB403 71L 56Z601 CHIP BEAD 600 OHM 0805 1 PCS FB404 71L 56Z601 CHIP BEAD 600 OHM 0805 1 PCS FB405 71L 56Z601 CHIP BEAD 600 OHM 0805 1 PCS FB406 71L 56Z601 CHIP BEAD 600 OHM 0805 1 PCS U601 87L 202 44 editatuak 1 PCS PD41C 441 D317 93L 39147 TZMC5V6 GS08 1 PCS D318 93L 39147 TZMC5V6 GS08 1 PCS D319 93L 39147 TZMC5V6 GS08 1 PCS D320 93L 39147 TZMC5V6 GS08 1 PCS D321 93L 39147 TZMC5V6 GS08 1 PCS D304 93L 60230 BAT54C L43 1 PCS D301 93L 64 33 BAV99 1 PCS D302 93L 64 33 BAV99 1 PCS D303 93L 64 33 BAV99 1 PCS D601 93L 6432V LL4148 GS08 1 PCS D201 93L1004 3 SS14 1 PCS D202 93L1020 1 S GS1D P Bire CS 71511150 B MAIN BOARD PCB 1 PCS PARE NTNO KEPC780KB3 KEY BOARD FOR T780K SW101 77L600 1GHJ KEY SWITCH 1 PCS SW102 77L 600 1GHJ KEY SWITCH 1 PCS SW103 77L 600 1GHJ KEY SWITCH 1 PCS SW104 77L 600 1GHJ KEY SWITCH 1 P
30. 95L 9023 TIN COATED 0 PCS 47 EN7220 Service Manual J908 95L 9023 TIN COATED 0 PCS J909 95L 9023 TIN COATED 0 PCS J910 95L 9023 TIN COATED 0 PCS J911 95L 90 23 TIN COATED 0 PCS R917 61L 17210052T 100HM 5 1 4W 1 PCS R243 61L 17210252T 1K OHM 5 1 4W 1 PCS R244 61L 17210252T 1K OHM 5 1 4W 1 PCS R918 61L 17210352T CFR 10KOHM 5 1 4W 1 PCS R920 61L 17247052T 47OHM 5 1 4W 1 PCS R922 61L 17247052T 47OHM 5 1 4W 1 PCS R908 61L 17268952T 6 80HM 5 1 4W 1 PCS R218 61L 60210152T 1000HM 5 1 6W 1 PCS R219 61L 60210152T 1000HM 5 1 6W 1 PCS R232 61L 60210252T CFR 1K OHM 5 1 6W 1 PCS R233 61L 60210252T CFR 1K OHM 5 1 6W 1 PCS R202 61L 60210352T CFR 10K OHM 5 1 6W 1 PCS R203 61L 60210352T CFR 10K OHM 5 1 6W 1 PCS R204 61L 60210352T CFR 10K OHM 5 1 6W 1 PCS R222 61L 60212352T 12KOHM 5 1 6W 1 PCS R223 61L 60212352T 12KOHM 5 1 6W 1 PCS R238 61L 60212352T 12KOHM 5 1 6W 1 PCS R239 61L 60212352T 12KOHM 5 1 6W 1 PCS R210 61L 60215352T 15KOHM 5 1 6W 1 PCS R211 61L 60215352T 15KOHM 5 1 6W 1 PCS R220 61L 60215352T 15KOHM 5 1 6W 1 PCS R221 61L 60215352T 15KOHM 5 1 6W 1 PCS R214 61L 60222252T 2 2K 5 1 6W 1 PCS R215 61L 60222252T 2 2K 5 1 6W 1 PCS R201 61L 60230352T 30KOHM 5 1 6W 1 PCS R205 61L 60247352T 47KOHM 5 1 6W 1 PCS R206 61L GOZ47352T 47 KOHM 5 1 6W 1 PCS R240 61L 60251352T 51KOHM
31. CS SW105 77L 600 1GHJ KEY SWITCH 1 PCS DP101 81L 12 1GP LED 1 PCS JP101 95L8014 16505 HARNESS 1 PCS 715L 977 119 PCB 1 PCS PARE NT NO PWPC7425A3E1 POWER BOARD PW7425A3E1SMT POWRE BOARD FOR SMT 1 PCS PWPC7425A3E1AI POWER BOARD 1 PCS CN102 33L800912A HEADER 2 6P 1 PCS CN201 33L80212D E WAFER 0 PCS CN202 33L80212D E WAFER 0 PCS CN203 33L80212D E WAFER 0 PCS 42 EN7220 Service Manual CN204 33L80212D E WAFER 0 PCS CN201 33L8021 2D U CONN 2P DIP R A LM401 0 0 PCS CN202 33L80212D U CONN 2P DIP R A LM401 0 0 PCS CN203 33L80212D U CONN 2P DIP R A LM401 0 0 PCS CN204 33L8021 2D U CONN 2P DIP R A LM401 0 0 PCS CN201 33L8021 2D AC CONN 2P R A 87210 0236 1 PCS CN202 33L8021 2D AC CONN 2P R A 87210 0236 1 PCS CN203 33L8021 2D AC CONN 2P R A 87210 0236 1 PCS CN204 33L8021 2D AC CONN 2P R A 87210 0236 1 PCS 40L 45762412A CBPC LABEL 1 03 PCS 44L3521 3EPE EPE 0 PCS 44L600029A CARTON 0 PCS 51L 6 4500 RTV J 2 56 51L 6 4502 RTV E O G 51L 6 4503 RTV Jk 0 G IC902 56L 139 3 PC123FY2 BY SHARP 0 PCS IC902 56L 139 3A PC123Y22 1 PCS IC902 56L 139 3B PC123 Y82 0 PCS IC901 56L 379 32 SG6841D BY SYSTEM 1 PCS Q209 57L 761 6 25C5706 DIP SANYO 1 PCS Q210 57L 761 6 25C5706 DIP SANYO 1 PCS Q211 57L 761 6 25C5706 DIP SANYO 1 PCS Q212 57L 761 6 25C5706 DIP SANYO 1 PCS R919 61L 2J39864B 0 390HM 5 2W 1 PCS NR901 61L 58080
32. EN7220 Service Manual SERVICE MANUAL 17 LCD Monitor 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 OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RE LIABILITY FOR CHANGES ERRORS OR OMISSIONS Manufacture Date Apr 09 04 EN7220 Service Manual Table of Contents Table of Contents 02 Revision List 04 1 Monitor Specification 05 2 LCD Monitor Description 05 3 Operation Instructions 06 3 1 General Instructions 06 3 2 Adjusting The Picture 06 4 Input Output Specification 08 4 1 Input Signal Connector 08 4 2 Factory Preset Display Modes _ 09 4 3 Power Supply Requirements 10 4 3 1 Inpu
33. ITE Balance 2 If replace Power Board only Please re do WHITE Balance 2 PANEL POWER CIRCUIT Check R624 should have response from OV to 5V When we switch the power switch from on to off Measured the Q601 pin 3 5 V 3 INVERTER CONTROL RELATIVE CIRCUIT Measured the inverter connector CN201 Pin2 on off control 5V on Pin10 PWM signal control dim OV 5V NG still no screen Replace power board to new one and check the screen is normal 29 NG no Voltage EN7220 Service Manual Check the PPWR panel power relative circuit Q603 Q602 pin7 8 In normal operation when LED green R624 should 0 v Replace Q601 N MOS 819933 Check the Bkit On relative circuit R212 R205 In normal operation when LED green R212 R205 Bklt On should 5 v If Bklt On no response when the power switch turn on off Replace U401 MST8111 Replace Power board amp Re do white balance 4 U4 DATA OUTPUT Measured DCLK pin 29 from U401 DVS DHS pin 37 38 from U401 Is the waveform ok DCLK around 48 MHZ DVS 60 09Hz DHS around 80 KHz refer to input signal 640x480 60 Hz 31k and LED is Green Check MST8111 U401 Signal output PIN102 103 106 113 118 125 128 1 Is the waveform ok 2 8 2 2 KEVPAD BOARD 30 OSD is unstable or not working Is Key Pad Board connecting normally Y N Is Button Switch normally Y Is Key Pad Board normally l Y Check Main B
34. N Cum fa AGEE VCPU R6 1613 FB602 NC 1 2 LASA 4 3 4 NEC 28 R632 R631 5 6 R627 Standb OK 1 16W 7 8 R626 Mute NC NC out t 1 19 OUT 3 STDETI R630 ANC DVI DSUB SELECT pory 5 14 OUTRI S ST_DETZ 1 ROW ANC T Mute key Ce C612 NC NC NC C614 C615 NO dde FB603 NC INN L Volume 4 KEN VCPU VCPU T VCPU R628 R617 R618 470 1 16W 470 1 1ew 470 1 16W al 4 7K 1 16W 4JK 1 16W al al R616 R62 LED B 4 7K IEA LED G 1 Q601 CN602 PMBS3906 R61 LED O PMBS3906 0603 PMBS3906 DVI DSUB SELECT 1 2 LED BLUE en 0602 E LED GRN 3 4 LED ORANGE E AUTO R620 A JIW 5 G 3 ENTER RIGHT R 0 EW 7 8 MENT Ri 0 View 5 g 10 Ti 12 Mute key C606 Ken C610 OUT L 13 14 OUTRE C607 C609 pur 15 16 OUTR 0 001uf 0 001uF 0 001uF 0 001uF 0 001uF CONTEA R920 C920 47 VAN 0 001uF 500V 1901 1f F902 FB903 1903 o anew 0 view d b ovn CON102 DB901 Re06 D910 2KBPO6M IM 14W S R904 C906 R903 gt C922 0924 0928 1M 14w 0 0015uF 2KV6 100K 2W 1000uF 16V 470UF 16V 0 1uF 1 3 JL 0805 R922 C921 FR 120uF 400V 47 114W 0 001uF 500V 7 7 20904 7 D901 SML4736 R907 R905 A uroo IM 14W gt IM 14W 1904 3 78 vom Sa 2 3 5 FB902 t T 4 925 26 L902 E D902 R908 1000uF 16V ATOUFMEV C907 FX P8102R 10 14W 10 11 1 4 10uF 4 D904 1N4148 NA NN RZ 7 C804 0 47uF 250V d 10901 gt R917 2 3 SG6841 s JUMPER je Q903 ES 2 28K2996 V 4 8 7 Lea R916 1 1 4 D905 24K 10W x 1N4148 N sla E 0913 R930 0 0022UF 250V 100 1 4W FB901 I C803 0
35. WT 8 OHM NCTR 1 PCS R903 61L152M104 64 100KOHM 5 2W 1 PCS C904 63L 107474 5S 0 47UF 10 250VAC 0 PCS C904 63L 107474 HS 0 47UF 10 250VAC 1 PCS C904 63L 10747410S 0 47UF 10 250VAC 0 PCS C213 63L210J2242A2 PMS 0 22UF 250V 1 PCS C214 63L210J2242A2 PMS 0 22UF 250V 1 PCS C213 64L180J224AAT CAP 0 22UF 160V R79 0 PCS C214 64L180J224AAT CAP 0 22UF 160V R79 0 PCS C906 65L 2K152 5E6052 1500 PF 10 2KV Y5P 0 PCS C906 65L 2K152 5E6285 1500 PF 10 2KV Y5P 0 PCS C906 65L 2K152 5E6921 1500 PF 10 2KV Y5P 1 PCS C215 65L 3J2206EM 22PF 5 3KV MURATA 0 PCS C216 65L 3J2206EM 22PF 5 3XV MURATA 0 PCS C217 65L 3J2206EM 22PF 5 3KV MURATA 0 PCS C218 65L 3J2206EM 22PF 5 3KV MURATA 0 PCS 43 EN7220 Service Manual C215 65L 3J2206ET 22PF 5 3KV TDK 1 PCS C216 65L 3J2206ET 22PF 5 3KV TDK 1 PCS C217 65L 3J2206ET 22PF 5 3KV TDK 1 PCS C218 65L 3J2206ET 22PF 5 3KV TDK 1 PCS C901 65L305M2222B2 2200PF 400VAC 250VAC 0 PCS C902 65L305M2222B2 2200PF 400VAC 250VAC 0 PCS C901 65L305M2222E3 2200PF 20 400VAC BY TD 1 PCS C902 65L305M2222E3 2200PF 20 400VAC BY TD 1 PCS C901 65L305M2222EM 2200PF 20 250VAC 400V 0 PCS C902 65L305M2222EM 2200PF 20 250VAC 400V 0 PCS C913 65L306M472 2B 4700PF 400V 20 Y1 CAP 0 PCS C913 65L306M4722B2 4700PF 20 400VAC Y1 1 PCS C922 67L 215102 3H 1000UF 20 16V 1 PCS C925 67L 215102
36. Y LEFT pice 2 7 KEY AUTO PIOS 3 8 KEY MENU RAGE 4 5 KEY RIGHT Mb AIK ANEW eu ONOFF R95 47K 1 16W 24 anew EN7220 Service Manual AOC rite Keypad ize Document Number lev B gm5126 A Date CH 22 2003 Sheet of EN7220 Service Manual 7 PCB Layout 7 1 Main Board DS O qat j da Hir e e e e 4838181884 Se w C PETE SE Koj GEA oe Sinne TUA O Ziz HERE E 2 3 E e ss e Hrs on de a B 9 Pie eo d e e m E g e EE SES Na ds n mun do 11 00 l EEE Sb 88 e aid Bi ye EE TE it fe e ei a A em de m er d zu l Era lt E babo HH MONN ep mm bei it a at tn p H N EEA il z Ze Ho RU A a Ae RECEN an ene bu be O minn al A e Ce gee MINE d Ba m mu ES u te E Je Za e FR ES eg d NE wa a On nee e IFE esase eis e See D e e dda a E Sesso 1 29 EN7220 Service Manual 7 2 Inverter Power Board E O O 6 E pou Has CR Ii Lan gene ER ja A a abuz JE SE 02 E A Ban Omm LI Il EZ m me en ll Of an 101 Mi ESK E pi g ont RA s P ear alle A x d GI 3 STE T i C3 dh MU Ec s pri elidi 7 pu H adia ln gt mil Mo pua d Jul Ges di i 8 de amp i a 5 2 Le AA a 8 4 o 715L1103 D s EP 715L1103 D i 26 8 Maintainability 8 1 Equirements and Tools Requirement 1 Voltmeter 2 Oscilloscope 3 Pattern Generator 4 DDC Tool with a IBM Compatible C
37. al register 0 100 bada Contrast Value Luminance CD Bright rt Backlight Adjustment EH rightness ackli ustmen g E Brightness Value Adjust Picture Phase to reduce Focus amp l 0 100 Do Auto Config Horizontal Line noise Image Setup Adjust picture Clock to reduce Clock 0 100 Do Auto Config Vertical Line noise Adjust the horizontal position of H Position SE 0 100 Do Auto Config Image EN the picture Position Adjust the vertical position of the V Position 0 100 Do Auto Config picture Recall Warm Color Temperature The Color Color Temp A Warm N A N A from EEPROM Temperature will Recall Cool Color Temperature be set to Cool Cool N A N A from EEPROM EN7220 Service Manual The User R G B User Red R Red Gain from Digital register 0 100 E y value default is User G A Ge AE 0 100 100 will not be reen Gain Digital register Green AD S kal Modified by Reset function User Blue B Blue Gain from Digital register 0 100 N Yes Auto Adjust the H V Position Auto Config N A N A N A Analog Onl Focus and Clock of picture nalog Un 9 Do not execute Auto Config y Model No N A N A N A return to main menu Adjust the horizontal position of H Position ba p 0 100 50 Adjust the vertical position of the OSD Setup SDI V Position i bea 0 100 50 meot D Adjust the OSD timeout 10 120 10 Timeout Set OSD d
38. g control PWM Parallet resonant inverter 17 EN7220 Service Manual Power Block Diagram AC INPUT B GO Rush zara Diode rectifier Di EMI filter DI prevention Rectification DI D filter Transformer 12V_To inverter ZA 5V To main Starting a resistance SZ SZ Switching circuit N Feedback control PWM control IC amp circuit MOSFET ON OFF control PWM Buck 8 DC Royer type L C control IC resonance circuit amp circuit Boost circuit y Ballast capacitor DIM control N Dimming Feedback control control circuit circuit 18 EN7220 Service Manual 6 Schematic 6 1 Main Board 715L1203 1 MST8111B SCHEMATIC RIN GNDR GIN TD RXD GNDG GNDG DDC CLK SOG SOG DDC DAT BIN BIN VCC2 5 VCC3 3 VAM VAA2 VAA3 VAM GNDB GNDB ST DET1 HSYNC HSYNC ST DET2 VSYNC VSYNC VCC2 5 VCC3 3 R R VAA R R G G VAA2 G G B B VAAJI B B CLK CLK VAA4 CLK CLK 3 INPUT B3 ST DET2 ST DETI
39. ge Temp 20 C to 60 C Operating Humidity 15 to 90 Packaged 7 4Kgs Unit Unpackaged 6 6Kgs Unit EN7220 Service Manual 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 Inverter board will drive the backlight of panel and the DC DC conversion Monitor Block Diagram EAO Flat Panel and CCFL backlight Main Board For white balance adjustment in Keyboard j factory mode AC IN 100V 240V HOST Computer Video signal DDC CCFT Drive Power board include adapter inverter EN7220 Service Manual 3 OPERATING INSTRUCTIONS 3 1 GENERAL INSTRUCTIONS Press the power button to turn the monitor on or off The other control buttons are located at front panel of the monitor By changing these settings the picture can be adjusted to your personal preferences The power cord should be connected Connect the video cable from the monitor to the video card Press the power button to turn on the monitor the power indicator will light up 3 2 Adjusting the Picture Luminance E E e i The descriptions for function control LEDS Main Main Menu Sub Menu Sub Menu A Adjust Menu Description Reset Value Item Item Icon Range Icon Recall Cool Contrast Contrast from Digit
40. isplay t English N A R E HOT N A nglish Set OSD display language to Deutsch N A s REO N A erman Set OSD display language to Francais N A Cem N A The Language rench Language will be set to E Set OSD display language to Espanol N A sw N A English pain Set OSD display language to Italiano N A SO GO N A alian m Set OSD display language to i N A N A MAX Simplified Chinese Show the resolution H V Information i Information N A frequency and input port of N A N A current input timing Clear each old status of Yes N A Auto configuration and set the N A N A Reset R gt color temperature to Cool Do not execute reset return to No N A N A N A main menu Exit MU N A N A Exit OSD N A N A EN7220 Service Manual 4 Input Output Specification 4 1 Input Signal Connector DESCRIPTION DESCRIPTION PINNO 6 Ramma M ve B Ground VGA connector layout 4 2 Factory Preset Display Modes EN7220 Service Manual VESA MODES Horizontal Vertical Nominal Sync Nominal Sync Nominal Frequenc Polarity Freq Polarity Pixel Mode Resolution Total y 1 Hz Clock MHz 0 5kHz 640x480 60Hz 800 x 525 31 469 N 59 940 N 25 175 VGA 640x480 72Hz 832 x 520 37 861 N 72 809 N 31 500 640x480 75Hz 840 x 500 37 500 N 75 00 N 31 500 800x600 56Hz 1024 x 625 35 156 N P 56 250 N P 36 000 SVGA 800x6
41. oard EN7220 Service Manual NG no transition Replace MST8111 U401 or replace Main board If Main Board being replace please do the DDC content reprogrammed Connect Key Pad Board Replace Button Switch Replace Key Pad Board EN7220 Service Manual 8 2 2 Power Inverter Board 1 No power Check to CN102 Pin1 and pin2 5V OK Check Interface board NG Check AC line volt 120V or 220V Change F901 check BD901 Q903 1C901 Check bridge rectified circuit Check start voltage for the pin3 of IC901 Change 1C901 Repeating the start voltage Check the auxiliary voltage is smaller than 20V 1 Check 1C902 IC903 2 Check Q901 Q902 OVP circuit OK Check the voltage of C905 OK Check R919 D910 D911 D912 D913 ZD904 31 EN7220 Service Manual 2 W LED No Backlight Check C201 12V Change F902 NG Check D201 Q209 Q210 or OK D202 Q211 0212 Check ON OFF signal NG Check Interface board f A Check U201 pin9 12V NG Change Q201 or Q202 Check the pin1 of U201 have saw tooth 5K NG Change U201 Check D201 D202 have the output of square wave at short time A NG Check Q205 Q207 Q203 D201 or Q206 Q208 Q204 D202 OK Check the resonant wave of pin2 amp pin5 for PT201 PT202 NG Check Q209 Q210 C213 or Q211 Q212 C214 OK Check the output of PT201 PT202 Change PT2010r PT202 OK Check connecter amp lamp
42. omputer 5 Alignment Tool 6 LCD Color Analyzer 7 Service Manual 8 User Manual 27 EN7220 Service Manual EN7220 Service Manual 8 2 Trouble Shooting 8 2 1 Main Board 1 NO SCREEN APPEAR 1 NO SCREEN APPEAR Measured CN201 pin5 12 V Measured CN201 pin 9 10 5V2 Check Correspondent component Is there any shortage or cold solder Measured U202 pin 2 3 3V LE Yes there have OSD show Disconnected the Signal cable Loose the Connected the Signal cable again A Signal cable Is the screen show Cable Not Check LED status Connected Replace U601 Flash Rom No nothing is show Led Orange Check Power switch is in Power on Connected the Signal cable status and check if Power switch had been stuck again Led orange Led Green OK Keyboard no stuck Measured RGB R305 R306 R307 Check Correspondent H V Input at U401 pin 37 38 was there component short open Check the Wire Harness from CN503 have signal Protection Diode OK Wire tight enough Check digital signal from CN301 Check Panel Power Circuit Block NG OK Panel Power OK OK input Normal Check U401 Data output Block Measured Crystal X401 14 318MHz OK U203 data OK OK clock Replace Power board and Check Replace U401 MST8111 Inverter control relative circuit Re do White balance adjust Note 1 If replace MAIN BOARD Please re do DDC content programmed 8 WH
43. t Output Requirements _ 10 4 3 2 Inverter Max Brightness 10 4 3 3 Inverter Min Brightness 10 4 4 Panel Specification QDI LO7 _ 11 4 4 1 Display Characteristics 11 4 4 2 Optical Characteristics 12 4 4 3 Parameter guide line for CCFL Inverter 12 5 Block Diagram _ 13 5 1 Monitor Exploded View 13 5 2 Software Flow Chart 14 EN7220 Service Manual 5 3 Electrical Block Diagram 16 5 3 1 Scalar Board 16 5 3 2 Inverter Power Board 17 SS 19 6 1 Scalar Board ________________________ 19 6 2 Inverter Power Board 22 6 3 Key Pad Board MM 24 7 PCB Layout 25

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