LG L1720B Service Manual

LG L1720B Manual

Get LG L1720B PDF manuals and user guides View all LG L1720B manuals
Add to My Manuals
Save this manual to your list of manuals

LG L1720B manual content summary:

  • LG L1720B | Service Manual - Page 1
    E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-82 MODEL: L1750SQ-SN (L1750SQ-SNN.AN**QP) L1750SQ-BN (L1750SQ-BNN.AN**QP) L1750SQ-WN (L1750SQ-WNN.AN**QP) ( ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN
  • LG L1720B | Service Manual - Page 2
    Blank Page1 龙泉现代YDW资料收藏
  • LG L1720B | Service Manual - Page 3
    DISASSEMBLY 8 BLOCK DIAGRAM 9 DESCRIPTION OF BLOCK DIAGRAM 10 ADJUSTMENT 12 SERVICE OSD 13 TROUBLESHOOTING GUIDE 14 WIRING DIAGRAM 18 EXPLODED VIEW 19 REPLACEMENT PARTS LIST 21 SCHEMATIC DIAGRAM 23 SPECIFICATIONS 1. LCD CHARACTERISTICS Type : TFT Color LCD Max. Resolution D-sub Analog
  • LG L1720B | Service Manual - Page 4
    FOR THE SAFETY-RELATED COMPONENT. • There are some special components used in LCD monitor that are important for safety. These parts are marked on the schematic diagram CAUTION Please use only a plastic screwdriver to protect yourself from shock hazard during service operation. -3- 龙泉现代YDW资料收藏
  • LG L1720B | Service Manual - Page 5
    with high voltage. 4. Do not spray chemicals on or near this receiver or any of its assemblies. 5. Unless specified otherwise in this service manual, clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner, cottontipped stick or comparable non-abrasive
  • LG L1720B | Service Manual - Page 6
    General Soldering Guidelines 1. Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range or 500。F to 600。F. 2. Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts lead. 3. Keep the soldering
  • LG L1720B | Service Manual - Page 7
    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 side of
  • LG L1720B | Service Manual - Page 8
    60 54 35 48 33 120 16 88 23 160 21 224 39 160 29 176 28 144 39 200 31 248 38 248 38 Resolution 640 x 350 720 X 400 640 x 480 640 x 480 800 x 600 800 x 600 832 x 624 1024 x 768 1024 x 768 1152 x 870 1152 x 900 1280 x 1024 1280
  • LG L1720B | Service Manual - Page 9
    Hinge Cover. # 3 Remove the screws. # 4 1. Pull the front cover upward. 2. Then, let the all latches are separated. 3. Put the front face down. # 5 Disassemble back cover. # 6 Remove the 6 screws from each up of metal frame. # 7 Pell off Al-tape from panel. # 8 Remove Al-tape from control pcb
  • LG L1720B | Service Manual - Page 10
    BLOCK DIAGRAM -9- 龙泉现代YDW资料收藏 5V LCD Module 5V 3.3V 3.3V Reg. TSU16AL & 78D33 TR(KTA1273) R,G,B differential LVDS (Low Voltage Differential Signaling) 3.3V 12V 5V AC Input LIPS 1.8V 1.8V TSU16AL including (
  • LG L1720B | Service Manual - Page 11
    gets the video signal converted analog to digital, interpolates input to 1280 X 1024 resolution signal and outputs 8-bit R, G, B signal to transmitter. 2. Power Part 5V in Power board. 12V is provided for inverter, 12V is provided for LCD panel and 5V for micom. Also, 5V is converted 3.3V and 1.8V
  • LG L1720B | Service Manual - Page 12
    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 achive the dc output stablize, and also the over power protection is also monitor by this part. 5. Photo-Coupler isolation. This part function is to
  • LG L1720B | Service Manual - Page 13
    .0 User Manual Operating System: MS Windows 98, 2000, XP Port Setup: Windows 98 => Don't need setup Windows 2000, XP => Need to Port Setup. This program is available to LCD Monitor only. 2. EDID Read & Write 1) Run WinEDID.exe 1. Port Setup a) Copy "UserPort.sys" file to "c:\WINNT\system32\drivers
  • LG L1720B | Service Manual - Page 14
    Gain : Allows you to set the R/G/B-Gain value manually.(Analog Only) i) MODULE : To select applied module. Video Signal Generator Control Line IBM 15 Compatible PC 10 5 Not used RS232C PARALLEL PORT OFF ON 5V F C PARALLEL VGS A MONITOR B V-SYNC ST POWER Power inlet (required) 220
  • LG L1720B | Service Manual - Page 15
    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK J705 VOLTAGE NO PIN5, PIN6 (5V)? YES CHECK NO U501 PIN 8 Voltage (5V) ? YES CHECK KEY CONTROL
  • LG L1720B | Service Manual - Page 16
    PROBE TO CAUTION LABEL. CAN YOU SEE PULSE AT YOUR SCOPE? YES REPLACE CCFL LAMP IN THE LCD MODULE CHECK POWER BOARD, AND FIND OUT A SHORT POINT AS OPENING EACH POWER LINE CHECK MICOM INV ON/OFF PORT. 1. CONFIRM BRIGHTNESS OSD CONTRL STATE. 2. CHECK MICOM DIM-ADJ PORT LIPS - 15 - 龙泉现代YDW资料收藏
  • LG L1720B | Service Manual - Page 17
    CHECK U803 (15") 1. CHECK PIN122, 123 SOLDERING CONDITION 2. CHECK X501 3. TROUBLE IN U201 U501 PIN43 IS 48KHz H-SYNC? NO 2 PIN44 IS 60Hz V-SYNC? IS PULSE APPEARED AT SIGNAL PINS? AT MODE 12? YES TROUBLE IN CABLE OR LCD MODULE CHECK CONNECTION LINE FROM D-SUB TO U501 Waveforms 1 U201-#96
  • LG L1720B | Service Manual - Page 18
    4. TROUBLE IN DPM TROUBLE IN DPM CHECK 3 R216, R217 R778, R781 YES CHECK U501 PIN 43.44 SYNC PULSE ? YES TROUBLE IN U501 NO CHECK PC PC IS NOT GOING INTO DPM OFF MODE NO CHECK H/V SYNC LINE Waveforms 3 R216, R778 H-Sync 3 R217, R781 V-Sync - 17 - 龙泉现代YDW资料收藏
  • LG L1720B | Service Manual - Page 19
    WIRING DIAGRAM Connector Ass'y P/N: 6631T11012W or 6631T11020W Connector Ass'y P/N: 6631T20034M or 6631T20023A Connector Ass'y P/N: 6631T11017X - 18 - 龙泉现代YDW资料收藏
  • LG L1720B | Service Manual - Page 20
    010 020 070 EXPLODED VIEW - 19 - 龙泉现代YDW资料收藏 080 090 100 030 060 110 040 050
  • LG L1720B | Service Manual - Page 21
    TCO99 8MS CABINET ASSEMBLY, L1750SQ BRAND L122 WHITE ABS TCO03 8MS JP-VER LCD(LIQUID CRYSTAL DISPLAY), LM170E01-A6K4 LG PHILPS TFT COLOR 8MS,LPL NJ/KUMI,PB FREE,EGI,TI S D-IC,SXGA,LVDS LCD(LIQUID CRYSTAL DISPLAY), LM170E01-A6K3 LG PHILPS TFT COLOR 8MS,LPL NJ/KUMI,PB FREE,EGI,SS S D-IC,EGI
  • LG L1720B | Service Manual - Page 22
    REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE : S SAFETY Mark AL ALTERNATIVE PARTS *S *AL LOC. NO. PART NO. MAIN BOARD CAPACITORS DATE: 2005. 03. 15. DESCRIPTION / SPECIFICATION C204 C205 C206 C207 C211 C213 C214 C215 C216 C217 C218 C219 C220
  • LG L1720B | Service Manual - Page 23
    1608 R/TP 4.7K OHM 1/10 W 5% 1608 R/TP SKQGACE010 J-ALPS NON 12V 50 *S *AL LOC. NO. PART NO. DATE: 2005. 03. 15. DESCRIPTION / SPECIFICATION SW2 SW3 SW4 SW5 ZD1 ZD2 6600TR1002A 6600TR1002A 6600TR1002A 6600TR1002A 0DZ560009GB 0DZ560009GB SKQGACE010 J-ALPS NON 12V 50 SKQGACE010 J-ALPS NON 12V 50
  • LG L1720B | Service Manual - Page 24
    SCHEMATIC DIAGRAM 1. TSU56AL / TSU16AL - 23 - 龙泉现代YDW资料收藏 3 Waveforms 1 U201-#96, 97 1 3 R216, R778 H-Sync 3 R217, R781 V-Sync
  • LG L1720B | Service Manual - Page 25
    2 2. MICOM - 24 - 龙泉现代YDW资料收藏 Waveforms 2 U501-#43 H-SYNC 2 U501-#44 V-SYNC
  • LG L1720B | Service Manual - Page 26
    3.POWER - 25 - 龙泉现代YDW资料收藏
  • LG L1720B | Service Manual - Page 27
    3 4. CONNECTOR & JACKS - 26 - 龙泉现代YDW资料收藏 Waveforms 3 R216, R778 H-Sync 3 R217, R781 V-Sync
  • LG L1720B | Service Manual - Page 28
    P/NO : 3828TSL094K Mar. 2005 Printed in Korea 龙泉现代YDW资料收藏
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
COLOR MONITOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE
SAFETY PRECAUTIONS
IN THIS MANUAL.
CHASSIS NO. : CL-82
MODEL:
L1750SQ-SN
(L1750SQ-SNN.AN**QP)
L1750SQ-BN
(L1750SQ-BNN.AN**QP)
L1750SQ-WN
(L1750SQ-WNN.AN**QP)
(
) **Same model for Service
*To apply the
MSTAR Chip
.
龙泉现代YDW资料收藏