Envision EN-7220 Manuale Utente

EN7220 Service Manual 1 SERVICE MANUAL 17” LCD Monitor THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HA

EN7220 Service Manual 10 4.3 Power Supply Requirements 4.3.1 Input Requirements INVERTER MAX BRINGTHNESS (Vadj: 5.0v), LOAD=120KΩX4(ROOM TEMPERA

EN7220 Service Manual 11 4.4 Panel Specification (CPT) 4.4.1 Display Characteristics ITEM SPECIFICATION Display Area (mm) 337.920(H) X270.336 (

EN7220 Service Manual 12 4.4.3 Parameter Guide for CFL Inverter ITEM SYMBOL MIN TYP MAX UNIT REMARK Lamp Voltage VL - 710 - V IL=6.0mA

EN7220 Service Manual 13 5. Block Diagram 5.1 Monitor Exploded View

EN7220 Service Manual 14 5.2 Software Flow Chart 12NY5YN10YN12YN7YN64389141113YN15YN161719YN18

EN7220 Service Manual 15 1) MCU initialize. 2) Is the eeprom blank? 3) Program the eeprom by default values. 4) Get the PWM value of brightne

EN7220 Service Manual 16 5.3 Electrical Block Diagram 5.3.1 Main Board

EN7220 Service Manual 17 5.3.2 Inverter/Power Board Inverter Block Diagram

EN7220 Service Manual 18 Power Block Diagram

EN7220 Service Manual 19 6. Schematic 6.1 Main Board Q204PMBS3904321VAA2 4GNDVAA2VCC5V+VCC5VCBEVAA1 4GNDD2DIODEonPanel_5V/3.3V6VCC5VR201 4.7K 1

EN7220 Service Manual 2 Table of Contents Table of Contents ---------------------------------------------------------------------- 02Revision

EN7220 Service Manual 20 C4120.1uFPA9U401MST8031/8131636061586259573738404143444647495052666769707132727374107553545351112184941041141261887971

EN7220 Service Manual 21 Volume 4C604 22pFR622 0R604 10KOUT-R-FB601 600 OHMR610 NCLED_BLUER617470R6164.7KR625 10K 1/16W　SCL 4Q601PMBS3906CBER60

EN7220 Service Manual 22 6.2 Inverter/Power Board L9012 31 4D910R9051M 1/4W　R9190.39 2W　CON102123456789101112L903ZD901RLZ20BD901UF4007R91510K

EN7220 Service Manual 23 6.3 Key Pad Board U3F74LCX1413 12147LED_ORGLED_ORANGE3KEY_AUTOGPIO23C970.001uFC840.001uFLED_GRNRP34.7K 1/16W　1234876

EN7220 Service Manual 24 7. PCB Layout 7.1 Main Board

EN7220 Service Manual 25 7.2 Inverter/Power Board 7.3 Keypad Board

EN7220 Service Manual 26 8. Maintainability 8.1 Equirements and Tools Requirement 1.) Voltmeter. 2.) Oscilloscope. 3). Pattern Generator. 4) D

EN7220 Service Manual 27 8.2 Trouble Shooting 8.2.1 Main Board 1.NO SCREEN APPEAR Defect Mode Failure

EN7220 Service Manual 28 Defect Mode Failure Analysis Repair Testing ATestNext CompleteANoise Check

EN7220 Service Manual 29 Defect Mode Failure Analysis Repair Testing Change Keyboard or Mainboard C

EN7220 Service Manual 3 5.3 Electrical Block Diagram -----------------------------------------------------165.3.1 Scalar Board ----

EN7220 Service Manual 30 8.2.2 Power/Inverter Board 1.) No power  Check to CN102 Pin1 and pin2 = 5V

EN7220 Service Manual 31 2.) W / LED, No Backlight Check C201 (+) =12V NG OK Check ON/OFF signal Check Inter

EN7220 Service Manual 32 8.2.3 Key Pad Board OSD is unstable or not working Is KeyPad Board connecting normally? Connect KeyPad BdI

EN7220 Service Manual 33 9. White-Balance, Luminance adjustment Approximately 30 minutes should be allowed for warm up before proceeding white

EN7220 Service Manual 34 b. Adjust 7800 color-temperature 9 Switch the chroma-7120 to RGB-mode (with press “MODE” button) 10 Switch the MEM.ch

EN7220 Service Manual 35 11.BOM LIST T782KCXNK6E1N 插入位置 元件料号 品名规格 用量 单位 CBPC780KCXEN CONVERSION BOARD 1 PCS KEPC780KC4 KEY BOARD 1

EN7220 Service Manual 36 45L 76 28 C PE Bag For Manual 1 PCS 45L 76 31 C PE BAG FOR BASE 1 PCS 45L 77 3 打包膜 173 CM 45L 7750

EN7220 Service Manual 37 CN201 33L8027 12 WAFER 2*6P 2.0MM R/A 1 PCS CN602 33L8027 16 WAFER 16PIN 2.0mm DIP 1 PCS 40L 457624 1B CPU

EN7220 Service Manual 38 FB301 61L0603000 CHIPR 0OHM +-5% 1/10W 1 PCS FB302 61L0603000 CHIPR 0OHM +-5% 1/10W 1 PCS FB303 61L0603000 CHIPR

EN7220 Service Manual 39 R607 61L0603103 CHIPR 10K OHM +-5% 1/10 1 PCS R613 61L0603103 CHIPR 10K OHM +-5% 1/10 1 PCS R614 61L0603103 CHIP

EN7220 Service Manual 4 1. MONITOR SPECIFICATIONS Driving system TFT Color LCD LCD Panel Size 43.2cm(17.0") Pixel pitch 0.264mm(H

EN7220 Service Manual 40 C406 65L0603104 32 CHIP 0.1UF 50V X7R 1 PCS C407 65L0603104 32 CHIP 0.1UF 50V X7R 1 PCS C408 65L0603104 32 CH

EN7220 Service Manual 41 FB404 71L 56Z601 CHIP BEAD 600 OHM 0805 1 PCS FB405 71L 56Z601 CHIP BEAD 600 OHM 0805 1 PCS FB406 71L 56Z601

EN7220 Service Manual 42 44L600029A CARTON 0 PCS 51L 6 4500 RTV 胶 2 G 51L 6 4502 RTV 胶 0 G 51L 6 4503 RTV 胶 0 G IC902 56

EN7220 Service Manual 43 C913 65L306M4722B2 4700PF +-20% 400VAC Y1 1 PCS C922 67L 215102 3H 1000UF +-20% 16V 1 PCS C925 67L 215102 3H

EN7220 Service Manual 44 Q204 56L 566 10 SI4431DY-T1-SMT 0 PCS Q203 56L 763 4 RSS050P03 0 PCS Q204 56L 763 4 RSS050P03 0 PCS Q205 5

EN7220 Service Manual 45 R909 61L1206472 CHIP 4.7KOHM 5% 1/4W 1 PCS R910 61L1206472 CHIP 4.7KOHM 5% 1/4W 1 PCS R911 61L1206472 CHIP 4.7KO

EN7220 Service Manual 46 J201 95L 90 23 TIN COATED 0 PCS J202 95L 90 23 TIN COATED 0 PCS J203 95L 90 23 TIN COATED 0 PCS J204 95L 9

EN7220 Service Manual 47 R223 61L 60212352T 12KOHM 5% 1/6W 1 PCS R238 61L 60212352T 12KOHM 5% 1/6W 1 PCS R239 61L 60212352T 12KOHM 5%

EN7220 Service Manual 48 C222 64L701J4740AT 0.47uF 50V 1 PCS C208 65L 44233113T 330PJNPO 50V 1 PCS C908 65L 450104 7T 0.1UF +80-20% 50V

EN7220 Service Manual 49 ------- ------------------------ ----------------------- --------- ---- PARENT NO: 705L782KB34072 BACK COVER ASS'

EN7220 Service Manual 5 2. LCD MONITOR DESCRIPTION The LCD MONITOR will contain a main board, an inverter/power board, keypad board and internal

EN7220 Service Manual 6 3. OPERATING INSTRUCTIONS 3.1 GENERAL INSTRUCTIONS Press the power button to turn the monitor on or off. The other contr

EN7220 Service Manual 7 User / Red Red Gain from Digital-register. 0-100 User / Green Green Gain Digital-register. 0-100 User / Blue Blue G

EN7220 Service Manual 8 4. Input/Output Specification 4.1 Input Signal Connector PIN NO. DESCRIPTION PI N NO. DESCRIPTION 1. Red 9. +5V 2.

EN7220 Service Manual 9 4.2 Factory Preset Display Modes VESA MODES Horizontal Vertical Mode Resolution Total Nominal Frequency +/- 0.5kHz