TFT-LCD MONITOR Chassis Model LRT19US 931MP 932MP SERVICE Manual TFT-LCD MONITOR CONTENTS 1. Precautions 2. Product Specifications 3. Disassembly & Reassembly 4. Alignment & Adjustments 5. Troubleshooting 6. Exploded View & Parts List 7. Electrical Parts List 8. Block Diagram 9.
Samsung Electronics Co.,Ltd. This Service Manual is a property of 416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Kyungki- Samsung Electronics Co., Ltd. Do, Korea, 443-742 Any unauthorized use of Manual can be Printed in Korea punished under applicable International P/N : BN82-00121C-00 and/or domestic law.
1 Precautions Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock. 1-1 Safety Precautions 1-1-1 Warnings For continued safety, do not attempt to modify the circuit (READING SHOULD board. NOT BE ABOVE 0.5mA) Disconnect the AC power and DC Power Jack before servicing.
1 Precautions 1-2 Servicing Precautions WARNING: An electrolytic capacitor installed with the wrong polarity might explode. Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions section of this manual. Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions.
2 Product Specifications 2-2 Pin Assignments Sync 15 Pin signal cable connector Type Separate H/V Composite H/V Pin No. Green Green Blue Blue No Connection No Connection GND (DDC Return) GND (DDC Return) GND-Red GND-Red GND-Green GND-Green GND-Blue GND-Blue No Connection No Connection GND-Sync/Self Test GND-Sync/Self Test...
2 Product Specifications 2-3 Timing Chart The timing no. is standardizde by Samsung to apply the same signal to all monitors manufactured by Sam sung 2-3-1 LCD Panel Mode : 1 mode N/I : Non-Interlaced, I : Interlaced ❇ Table 2-1 Timing Chart...
2 Product Specifications 2-3-2 Supported Modes (1) Any timing modes that can be formed within the operating horizontal and vertical frquency range. Table 2-2 Timing Chart...
4 Alignments and Adjustments This section describes to adjust LCD monitor after replacing EEPROM, Main PBA or Panel. 4-1 DDC jig installation Monitor (need to adjust) Parallel Cable (25Pin) MTI-2031 PC system DDC Manager (to input DDC data) Signal Cable * Please use DVI cable connection adapter for DVI input.
4 Alignments and Adjustments 2. Click “Sys Config” Select “Station : Write station”. Check “Serial No and Week : Don’t change” Click “Save” 3. Click “Open” icon. Select “Connected Port #1” and Next “OK”. * File Name - 930MPA.DDC : Analog 930MPD.DDC”...
4 Alignments and Adjustments 4-3 Factory Mode Adjustments 4-3-1 Factory Mode Admission - PAL : Power off -> INFO -> MENU -> MUTE -> Power ON - NTSC : Power off -> MUTE -> 1 -> 8 -> 2 -> Power ON 4-3-2 Factory Mode OSD GAMMA BLE MODE...
4 Alignments and Adjustments ADC 9883 RED Gain BLUE Gain GREEN Gain RED Offset BLUE Offset GREEN Offset Auto Color Custom Color RED Gain BLUE Gain GREEN Gain Panel Info Total Hr Upper Lamp Hr Lower Lamp Hr Reset Auto Adj Option Suwon CH.
5 Troubleshooting 5 Troubleshooting 5-1 No Power WAVEFORMS Does proper DC14V appear Check Adaptor. at BD600(+14V_IN)? Does proper 0V appear at Check related circuit of Q604 R629? (MAIN_PW) or IC400 Does proper 5V appear at Check related circuit of IC606. R626? Does proper 3.3V appear at Check related circuit of IC607.
5 Troubleshooting 5-2 No Video (PC Signal) WAVEFORMS Power Indicator is green. Does a signal appear at Pin No.4, 10 of IC102? Check IC102 or CN101. (H/V Sync) Does a signal appear at Check related circuit of C100,C102,C104? CN101. (R, G, B input) Does a signal appear at pin No.1~30 of CN400? Check IC400.
5 Troubleshooting 5-3 No Picture (TV) Does a signal appear at WAVEFORMS Pin No.1,2 of Check CN702 and Tuner. FT707(X6966M)? Does a signal appear at Check related circuit IC701 R787,R788 and R793? and Q704,Q705,Q706.(VCTI) (VCT_ROUT,GOUT,BOUT) Does a signal appear at Check related circuit Pin No.99,98 of IC701.(VCTI)
5 Troubleshooting 5-4 No Picture (VIDEO/S-VIDEO/SCART) Does a signal appear at WAVEFORMS R716(VIDEO), R720, Check related circuit A/V Ass'y R721(S-VIDEO), and CN700. R722(SCART)? Does a signal appear at Check related circuit IC701 RA787, R788 and R793? and Q704, Q705, Q706.(VCTI) (VCT_ROUT,GOUT,BOUT) Does a signal appear at Check related circuit...
5 Troubleshooting 5-5 No Picture (COMPONENT ) Does a signal appear at Check related circuit WAVEFORMS R7069,R7067,R7072 CN75,CN74,CN72 or AV (COMP_Y,Pb,Pr)? DEVICE. Does a signal appear at Check related RA709~RA714 IC705.(MST9886) (ADC output)? Does a signal appear at Pin No.1~30 of CN400 Check IC400.(GM150H) (LVDS output)? Replace LCD Panel.
5 Troubleshooting 5-6 No Sound(COMPONENT) WAVEFORMS Does a signal appear at Check related circuit CN71, R745, R747? CN73 or AV DEVICE. Does a signal appear at R759, Check related circuit R760? IC700.(TEA6422D) Does a signal appear at Check related circuit R511, R516? IC701.(VCTI) Does a signal appear at...
5 Troubleshooting 5-7 No Sound(TV) Does a signal appear at WAVEFORMS Pin No.1,2 of Check CN702 and Tuner. FT707(X6966M)? Does a signal appear at Check related circuit R511,R516? IC701.(VCTI) Does a signal appear at Check related circuit L500,L501,L503,L504? IC501.(TPA3002) (SL/SROUT) Check the Speaker L/R.
5 Troubleshooting 5-8 No Sound(VIDEO,S-VIDEO,SCART) Does a signal appear at R726, WAVEFORMS Check related circuit A/V Ass'y R727(VIDEO/S-VIDEO) or and CN700. R722, R723(SCART)? Does a signal appear at Check related circuit R759, R760? IC700(TEA6422). Does a signal appear at Check related circuit R511, R516? IC701.(VCTI) Does a signal appear at...
5 Troubleshooting 5-9 No Sound(PC) WAVEFORMS Does a signal appear at R143, Check CN100 and R144(PC-AL/AR)? PC sound input cable. Does a signal appear at Check related circuit R759, R760? IC700(TEA6422). Does a signal appear at Check related circuit R511, R516? IC701.(VCTI) Does a signal appear at Check related circuit...
7 Electrical Parts List 7 Electrical Parts List -You can search for updated part codes through ITSELF web site. URL : http://itself.sec.samsung.co.kr/ 7-1 LS19RTUSSZ/EDC Parts list Level Loc. No. Code No. Description & Specification Q'ty SA/SNA LS19RTUSSZ/EDC 932MP,SGP2/S19AW-LRT,19,LCD-MO,NETHERLAN M0002 BN90-00656X ASSY COVER REAR;RT19FS,W/W...
3 Disassembly and Reassembly 3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the RT19FS LCD monitor. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 3-1 Disassembly Cautions: 1.
3 Disassembly and Reassembly 6. Remove 3 screws from the shield PCB and lift up the shield. 7. Disconnect LVDS cable, inverter cable the board. 8. Remove 4 screws from the board and lift up the board. 9. Carefully reomve the silicon glue on the Lamp wire cable with a nipper and disconnect cable.
3 Disassembly and Reassembly 12. Remove 4 screws from panel shield.(Right/Left) 13. Lift up panel shield. This picture is panel. 3-3 Reassembly Reassembly procedures are in the reverse order of dissasembly procedures, place the lamp wire correctly in the locator groove so that the wire will not bind or interfere with rear cover.