LG L1915S Service Guide
LG L1915S - LG - 19" LCD Monitor Manual
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LG L1915S manual content summary:
- LG L1915S | Service Guide - Page 1
GGuuiiddee SSppeecciiffiiccaattiioonn 1. Model Description MODEL L1915SM SUFFIX ALAUR BRAND LG Product Name FLATRON L1915S 2. Printing Specification 1. Trim Size (Format) : 215mm x 280 mm 2. Printing Colors • Cover : LG COLORS • Inside : Black 3. Stock (Paper) • Cover : Snow White 150 - LG L1915S | Service Guide - Page 2
PPaaggiinnaattiioonn sshheeeett D ʱDʵDʵ Dʶʲ C Cʷ DD Cover Front Cover inside 2 English 3 English English .... .... English English .... ..... English English .... .... English English .... .... English 22 Rear Cover Inside 23 Rear Cover - LG L1915S | Service Guide - Page 3
Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-61 MODEL: L1915S (L1915SM-AL**R) ( ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. *To apply the Mstar Chip. - LG L1915S | Service Guide - Page 4
CHART 4 OPERATING INSTRUCTIONS 5 WIRING DIAGRAM 6 BLOCK DIAGRAM 7 DESCRIPTION OF BLOCK DIAGRAM 8 ADJUSTMENT 10 TROUBLESHOOTING GUIDE 12 EXPLODED VIEW 16 REPLACEMENT PARTS LIST 18 SCHEMATIC DIAGRAM 20 SPECIFICATIONS 1. LCD CHARACTERISTICS Type : TPT Color LCD Module Size : 19inch - LG L1915S | Service Guide - Page 5
in LCD monitor that are important for safety. These parts are marked on the schematic backlight (CCFL) or inverter circuit, must disconnect the AC adapter because high voltage appears at inverter circuit about 650Vrms. • Handle with care wires or connectors of the inverter service operation. -3- - LG L1915S | Service Guide - Page 6
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 640x350 70Hz 720x400 70Hz 640x480 60Hz 640x480 75Hz 800x600 60Hz 800x600 75Hz 832x624 75Hz 1024x768 60Hz 1024x768 75Hz 1152x900 75Hz 1152x900 65Hz 1280x1024 60Hz 1280x1024 - LG L1915S | Service Guide - Page 7
INSTRUCTIONS FRONT VIEW REAR VIEW Power Connect Front Control Panel Front Control Panel D-Sub Signal Connect 2 1. Power ON/OFF Button Use this button to turn the monitor on or off. Power Indicator This indicator lights up green when the monitor the current screen resolution size (display mode - LG L1915S | Service Guide - Page 8
OPERATING INSTRUCTIONS CONTROLS LOCKED/UNLOCKED : MENU and This function allows you to secure the current control settings, so that they cannot be inadvertently changed. Press and hold - LG L1915S | Service Guide - Page 9
BLOCK DIAGRAM -7- 5V 3.3V Reg. 3.3V 3.3V Diode KDS184 2.5V 12V 5V AC I nput LIPS 12 V 5V LCD Module R,G,B differential LVDS (Low Voltage Differential Signaling) 2.5V MST9111B including 3.3V (ADC/LVDS/SCALER ) R,G,B, H/ V Sync MTV312 Micom D-SUB - LG L1915S | Service Guide - Page 10
X 1024 resolution signal and outputs 8-bit R, G, B signal to transmitter. 2. Power Part. This power which is provided 12V, 5V in Power board. 5V is provided for and 12V is provided for LCD panel Micom. Also, 5V is converted 3.3V by regulator and 3.3V is converted 2.5V by drop diode. Converted power - LG L1915S | Service Guide - Page 11
SIGNAL COLLECT- ON SECONDA RY 12V INVERTER CIRCUIT High Voltage output Operation description_LIPS driver signal to power switch, to adjust the duty cycle during different AC input and output loading condition to achive the dc output stablize, and also the over power protection is also monitor - LG L1915S | Service Guide - Page 12
.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 L1915S | Service Guide - Page 13
SERVICE OSD 1) Turn off the power switch at the front side of the display. 2) Wait for about 3 seconds and press MENU, POWER switch with 1 second interval. 3) The SVC OSD menu contains additional menus that the User OSD menu as described below. a) MODULE : To select applied module. b) NVRAM INIT : - LG L1915S | Service Guide - Page 14
TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK J705 VOLTAGE PIN5, PIN6 (5V)? YES CHECK U501 PIN 8 Voltage (5V) ? YES CHECK KEY CONTROL CONNECTOR ROUTINE CHECK POWER NO BOARD, AND FIND OUT A SHORT POINT AS OPENING EACH POWER LINE NO CHECK 5VS LINE (OPEN CHECK) NO - LG L1915S | Service Guide - Page 15
AS CONTACTING SCOPE PROBE TO CAUTION LABEL. (CONTACT PROBE TO CAUTION LABEL. CAN YOU SEE PULSE AT YOUR SCOPE? YES REPLACE CCFL LAMP IN THE LCD MODULE NO - 13 - LIPS - LG L1915S | Service Guide - Page 16
POWER PIN 8,114 3.3V? YES U201 PIN122, 123 OSCILLATE AS 12MHZ? YES NO CHECK U801 1. CHECK PIN122, 123 NO SOLDERING CONDITION 2. CHECK X501 3. TROUBLE IN U201 U501 PIN43 IS 64KHz H-SYNC? PIN44 IS 60Hz V-SYNC? IS PULSE APPEARED AT SIGNAL PINS? AT MODE 12? YES TROUBLE IN CABLE OR LCD - LG L1915S | Service Guide - Page 17
TROUBLE IN DPM 4. TROUBLE IN DPM CHECK R773, R775 (SYNC) ? 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 - 15 - - LG L1915S | Service Guide - Page 18
101 107 EXPLODED VIEW 102 110 109 103 111 112 108 104 106 - 16 - 105 - LG L1915S | Service Guide - Page 19
), LM190E03-B4K1 LG PHILPS TFT COLOR 20T,TN,250NITS,SXGA,LVDS BACK COVER ASSEMBLY, L1915S 3808TKL086A ABS,8D966 -For Australia BACK COVER ASSEMBLY, L1915S TKL086A WA-LOCAL -For Europe TILT SWIVEL ASSEMBLY, L1915S . NO SWIVEL 8D966 -For Australia TILT SWIVEL ASSEMBLY, L1915SN . L1915SN LGEWA LOCAL - LG L1915S | Service Guide - Page 20
BEFORE 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: 2004. 08.12 DESCRIPTION / SPECIFICATION C204 C205 C206 C207 C208 C209 C210 C211 C214 C215 C216 C217 C218 - LG L1915S | Service Guide - Page 21
1608 R/TP 10K OHM 1/10 W 5% 1608 R/TP *S *AL LOC. NO. PART NO. DATE: 2004. 08.12 DESCRIPTION / SPECIFICATION R737 R744 R745 R747 R748 R769 R772 R773 R774 R775 R779 R780 R781 R782 R783 R803 R807 R808 R810 R814 R815 R821 R822 R824 0RJ0000D677 TP GRANDE DO-34 50 LITEON LTL-1BEDJ-0C2 TP GRE - 19 - - LG L1915S | Service Guide - Page 22
SCHEMATIC DIAGRAM 1. SCALER - 20 - 1 - LG L1915S | Service Guide - Page 23
2. MICOM - 21 - - LG L1915S | Service Guide - Page 24
3. POWER - 22 - - LG L1915S | Service Guide - Page 25
4. CONNECTOR/JACKS - 23 - - LG L1915S | Service Guide - Page 26
P/NO : 3828TSL095Y Aug. 2004 Printed in Korea
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Model Description
MODEL
BRAND
Printing Specification
1. Trim Size (Format) :
215mm x 280 mm
2. Printing Colors
•
Cover :
LG COLORS
•
Inside :
Black
3. Stock (Paper)
•
Cover :
Snow White 150 g/
༇
•
Inside :
Snow White 100 g/
༇
4. Printing Method :
5. Bindery
:
Saddle stitch
6. Language :
English
7. Number of pages :
24
Part No.
1.
2
.
Service Guide Specification
Changes
4.
REV.
NO.
MM/DD/YY
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CONTENTS
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SUFFIX
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L1915SM
LG
3828TSL095Y
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(1) Origin Notification
* LGEDI : Printed in Indonesia
* LGEWA : Printed in U.K.
* LGESP : Printed in Brazil
* LGEMX : Printed in Mexico
* LGENT : Printed in China
* LGEIL : Printed in India
8
Special Instructions
3
.
Product Name
FLATRON L1915S
ALAUR