COLOR MONITOR LE15V*/ LE17LS/LE17LT/LE17KS/ LE17KT/LE17JS/LE17JT SERVICE Manual COLOR 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. Wiring Diagram 10.
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Samsung Electronics Co.,Ltd. ❈ This Service Manual is a property of Samsung 416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Kyungki-Do, Korea, 443-742 Electronics Co., Ltd. Printed in Korea Any unauthorized use of Manual can be punished P/N : BH82-00015J-00 under applicable International and/or domestic law.
1 Precautio 1-1 Safety Precautions WARNINGS Inspect all protective devices such as nonmetallic For continued safety, do not attempt to modify the control knobs, insulating materials, cabinet backs, circuit board. adjustment and compartment covers or shields, isolation resistor-capacitor networks, mechanical Disconnect the AC power before servicing.
1 Precautions 1-2 Servicing Precautions WARNING1: First read the “Safety Precautions” section of this manual. If unforeseen circumstances create conflict between the servicing precautions and safety precautions, always follow the safety precautions. WARNING2: A high voltage VR replaced in the wrong direction may cause excessive X-ray emissions.
2 Product Specifications 2-3 Pin Assignments Sync Type Macintosh Separate Pin No. GND-R Green Blue H/V Sync Sense 0 DDC Return Green GND-R GND-G GND-G Sense 1 GND-B Reserved DC 5V Blue GND-Sync/Self-raster Sense 2 DDC Data V-Sync H-Sync GND-B V-Sync DDC Clock H-Sync...
2 Product Specifications 2-4 Timing Chart This section of the service manual describes the timing that the computer industry recognizes as standard for computer-generated video signals. 2-4-1 LE15V* Table 2-1 Timing Chart Mode VESA (LE15V* Only) 640/85 Hz 800/85 Hz 640/75 Hz 640 x 480 800 x 600...
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2 Product Specifications 2-4-2 LE17LS/LE17LT/LE17KS/LE17KT Table 2-2 Timing Chart Mode VESA 800/85 Hz 1024/85 Hz 640/75 Hz 640 x 480 800 x 600 1024 x 768 Timing fH (kHz) 37.500 53.674 68.677 A µsec 26.667 18.631 14.561 B µsec 2.032 1.138 1.016 C µsec...
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2 Product Specifications 2-4-3 LE17JS/LE17JT Table 2-3 Timing Chart Mode VESA 1024/85 Hz 1280/75 Hz 640/75 Hz 640 x 480 1024 x 768 1280 x 1024 Timing fH (kHz) 37.500 68.677 79.976 A µsec 26.667 14.561 12.504 B µsec 2.032 1.016 1.067 C µsec...
3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the LE15V*/LE17LS/LE17LT/LE17KS/LE17KT/LE17JS/LE17JT TFT-LCD monitors. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 3-1-1 LE15V* Cautions:1. Disconnect the monitor from the power source before disassembly. 2.
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3 Disassembly and Reassembly 6. Disconnect function wire connecter from the MAIN board. Remove 4 screws from the front cover. 7. Remove CDT from the front cover. 3-1-2 LE17KS/LE17KT/LE17JS/LE17JT 1. Release the snaps on the rear stand and pull the stand backwards from the monitor and remove 2 screws from the rear top shield.
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3 Disassembly and Reassembly High voltage may be present. Caution : Remove the high voltage cap from the CDT. 6. Disconnect DY cable, D-COIL cable from the CDT socket. Using the jig, release the snaps connecting the front cover and the PCB. Lift up the bottom to separate the two shields.
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3 Disassembly and Reassembly 3. Disconnect 3 ground from the shield video and carefully remove the silicon glue on the CDT socket with a razor. Caution : CDT socket may be easily damaged. Please use caution when remoning the silicon glue. High voltage may be present.
4 Alignment and Adjustments This section of the service manual explains how to make permanent adjustments to the monitor. Directions are given for adjustments using the monitor Interface Board Ver. 2.0 and software (Softjig). 4-1 Adjustment Conditions Caution: Changes made without the Softjig are saved only to the user mode settings. As such, the settings are not permanently stored and may be inadvertently deleted by the user.
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4 Alignment and Adjustments 4-2 Display Control Adjustments 4-2-1 HIGH VOLTAGE Signal: 800 x 600 (15” 54 kHz/85 Hz) Use control bar after selecting size B+ in the left 1024 x 768 (17” 68 kHz/85 Hz) Menu to adjust the horizontal size of the display, Display image: Don’t care Pattern to 267mm(Tolerance : ±4mm.)(15”) Contrast:...
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4 Alignment and Adjustments 4-2-4 Linearity 68 kHz/85 Hz : 17” Display image: Crosshatch pattern Linearity affects the symmetry of images as they Brightness: Maximum appear on the screen. Unless each row or column Contrast: Maximum of blocks in a crosshatch pattern is of equal size, or within the tolerances shown in Tables 4-2 and Use control bar after selecting “TRAPEZOID”...
4 Alignment and Adjustments 4-2-8 Side Pincushion Adjustment 4-2-9 Degauss No adjustments are available for the degaussing CONDITIONS circuit. The degaussing circuit can effectively Scanning frequency: 54 kHz/85 Hz : 15” function only once every 30 minutes. 68 kHz/85 Hz : 17” Display image: Crosshatch pattern 4-2-10 To Delete the User Mode Data...
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4 Alignment and Adjustments 1. Use control bar after selecting “RED GAIN”, Luminance Table 4-4. “GREEN GAIN” and “BLUE GAIN” to adjust 28 ft-L Without ABL the luminance 115 ± 1 ft-L (17”) with the color coordinates ranged for 9300K to x = 0.283 ± 0.02, y = 0.298 ±...
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4 Alignment and Adjustments CONDITIONS Orientation: Monitor facing east Table 4-6. Color Purity Tolerances Scanning frequency: 54 kHz/85 Hz : 15” 68 kHz/85 Hz : 17” Red: x = 0.645 ± 0.015 y = 0.321 ± 0.015 Display image: White flat field Green: x = 0.285 ±...
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4 Alignment and Adjustments Memo LE15V*/LE17LS/LE17LT/ LE17KS/LE17KT/LE17JS/LE17JT...
5 Troubleshooting 5-1 Parts Level Troubleshooting Notes: Check the following circuits. • No raster appears: Power circuit, Horizontal output circuit. • High voltage develops but no raster appears: Video output circuits. • High voltage does not develop: Horizontal output circuits. 5-1-1 No Power Supply WAVEFORMS Check and replace D601 and FH1...
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5 Troubleshooting 5-1-2 DPMS Failure WAVEFORMS Check signal source H/V sync. video level. 332Vpp (IC601, #1) Make no H/V Sync. (power off mode) LED blinks? Check IC201 Pin 40. Check IC201 Pin 5/Pin 6 and +12 V line off? Q624, Q625 operation. IC601 Pin 1 output Refer to 5-1-1 no power supply.
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5 Troubleshooting 5-1-3 H_Deflection Failure Does PWM output signal appear Does DC 12V appear at Check 12 V line. at Pin 28 (B_DRV) of IC401? Pin 29 of IC401? WAVEFORMS Check IC401. 12 Vpp (IC401, #28) Does horizontal pluse signal Check IC401.
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5 Troubleshooting 5-1-5 H_Lin. Failure Check and Replace L441 (Fix Type) 5-1-6 Invariable H_Size IC401 Pin 28 voltage varies with Check and replace IC401. different B_DRV DAC values? Q590 gate output duty varies with Check some parts around Q590, different B_DRV DAC values? Pin 14~16 of IC401.
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5 Troubleshooting 5-1-8 Side Pin or Trap Failure WAVEFORMS IC401 Pin 24 output exists? Check and replace IC401. 0.44 Vpp (IC401, #24) Refer to 5-1-7 abnormal H_Size . 5-1-9 Para. or Pin Balance Failure IC401 Pin 24 output varies with Refer to 5-1-7 abnormal H_Size .
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5 Troubleshooting 5-1-11 V Deflection Failure WAVEFORMS 13V and –10V lines are on? Refer to 5-1-1 no power supply 2.5 Vpp (IC401, #23) IC401 Pin 23 output exists? Check and replace IC401. Check and replace 50 Vpp (IC301, #6) IC301 Pin 6 output exists? components around IC301.
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5 Troubleshooting 5-1-13 High Voltage Failure WAVEFORMS Check and replace IC401 IC401 Pin 28 OSC pulse exists? 12 Vpp (IC401, #28) and +12 V line. Q590 gate driving pulse exists? Check and replace Q501 and Q502. Check and replace 12 Vpp (Q590, Gate) Q590 drain pulse exists? Q590, L501 and D501.
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5 Troubleshooting 5-1-15 Dynamic Focus Failure ( Only 17” Function) WAVEFORMS IC401 Pin 32 output is right? Replace the IC401. 0.58 Vpp (IC401, #32) Some parts around Q551 are right? Replace failed part. T561 Pin 6 input is right? 50.0 V (T561, #6) Check and replace C443.
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5 Troubleshooting 5-1-16 No Video WAVEFORMS Check signal cable and connection. 1.00V (IC102 #5,6,7) IC102 Pin 5, 6 and 7 Check the signal cable connection. inputs are right? IC102 Pin 19, 20 and 21 Check I C bus and +12V line. outputs are right? 1.00V (IC102 #19,20,21) IC106 Pin 2, 4 and 6...
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5 Troubleshooting 5-1-17 MICOM Failure WAVEFORMS IC201 Pin 11 input voltage is 5V? Check IC621. 5 Vpp (IC201, #13, 14) IC201 Pin 13 and 14 Check C202, C203 and X201. inputs are right? IC201 Pin 18 input is right? Check and replace IC201 and R225. All in/output values are right? Replace IC201.
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5 Troubleshooting 5-1-18 OSD Failure Check CN203 or CN201 and WAVEFORMS connector ass’y. 1.00 V (IC102, #24) Check and replace IC102 Pin 24 input is right? IC105, C101, and R102, ZD104. IC102 Pin 1 input is right? Check CN102 Pin 8. 1.00 V (IC102, #1) IC102 Pin 11 and 12 Check IC201 Pin 41 and 42.
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5 Troubleshooting 5-1-19 User Control & Power Switch Failure Does the DC level change at Check the button. Pin 37 & 38 of IC201 when you (SW201 ~ SW205) push the S/W button? Check IC201. 5-1-20 Degaussing Failure Check degaussing connector. RL601 operation is right? Check D-coil and TH601.
5 Troubleshooting 5-2 General Troubleshooting 5-2-1 No Picture LED blinks? Refer to 5-2-2 shut down. LED is green color? Check MICOM. Check G2 voltage, high voltage and R, G, B cathode voltage. 5-2-2 Shut Down Blinking LED’s? Check power supply. Check horizontal, vertical deflection Scan failure? system and check power supply...
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5 Troubleshooting 5-2-3 Missing Color WAVEFORMS Proper Video levels are Check signal generator. 10.0 V (R,G,B, Video) on CN101 (D-Sub) Pin 1, 3 and 5? Proper video signal Refer to 5-1-16 no video. to all cathodes? Check IC102 Pin 14, 15 and 16. Proper DC voltage to all cathodes? Check IC104.
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5 Troubleshooting 5-2-4 Visible Retrace WAVEFORMS Check white balance adjustment. 5.00V (Q511, Collector) G2 voltage is right? Check T501. Blank pulse at Pin 3 of IC401? Check IC401. 20.00V (CRT Socket, G1) V_FLB pulse at Check Q511. collector of Q511? Valid the vertical pulse Check CN102 and CN201.
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5 Troubleshooting 5-2-5 Unsynchronized Image Check input signals Pin 2, 3 and 5 of CN202. Signals are right? Check video cable Signals at Pin 28 and 29 of Check IC201. IC201 are right? Signals at Pin 1 and 2 of Check IC401 IC401 are right? Check circuits on main board.
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5 Troubleshooting 5-2-6 Misconvergence Adjust convergence. Convergence is now Done within spec.? Readjust convergence. Convergence is now Done within spec.? Change CRT and readjust convergence. Done LE15V*/LE17LS/LE17LT/ 5-17 LE17KS/LE17KT/LE17JS/LE17JT...
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5 Troubleshooting 5-2-7 Poor Focus ( Only 17” Function) Adjust focus VR of FBT. Align monitor and Improved focus? check for focus change. Check focus leads from FBT to CRT socket. Check CRT socket. Refer to 5-1-15 dynamic Dynamic focus circuit is right? focus failure.
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6 Exploded View and Parts List ❈ You can search for updated part codes through ITSELF web site. URL : http://itself.sec.samsung.co.kr/ 6-1 LE15V* LE15V*/LE17LS/LE17LT/ LE17KS/LE17KT/LE17JS/LE17JT...
7 Electrical Parts List ❈ You can search for updated part codes through ITSELF web site. URL : http://itself.sec.samsung.co.kr/ 7-1-1 LE15V* Main PCB Parts Level Loc. No. Code No. Description Specification Remarks LE15VS SN-LE15VS SDD,NORMAL BH94-00975A ASSY PCB MAIN-SN LE15VS...
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7 Electrical Parts List 7-4-3 LE17JS(LE17JT) Others Level Loc. No. Code No. Description Specification Remarks BH90-00592A ASSY COVER REAR LE17JS,EDC BH63-00130A COVER-REAR LE17KS,ABS HB,IV16 BH90-00598A ASSY STAND LE17JS/LE15VS,EDC BH96-00272A ASSY STAND P LE17KS,ABS HB IV16 6902-000109 BAG PE HDPE,T0.015,L430,W350,TRP,28,2,PE MARK BH60-00030A FASTENER-BAND PN17LT,ST+PVC,P0.4,-,150,YELLOW,-,-,-...
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7 Electrical Parts List 7-5-1 LE15V* Mechanically Different Part List DESCRIPTION Code No SPEC Q’TY NEW/Common REMARK 1. ASS’Y/COVER-FRONT BH96-00270A ABS VO IV16 LE15VS 1-1. COVER FRONT(15 only) BH63-00122A 1-2. KNOB FUNCTION BH64-00151A ABS HB IV16 ALL(Sync.Sam) Common(15.17.19) 1-3. FUNCTION PCB BH96-00287A 1-4.
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AQ Common 1-6. SCREW 6003-001023 BH,+,B,M3,L10,ZPC(YEL) 1-7. SCREW 6006-001119 5*25 2. COVER REAR BH63-00130A ABS HB IV16 Change core (SAMSUNG) 3. ASS’Y/STAND BH96-00272A ABS HB IV16 Sync.SAM15.17 Common 1-1. STAND TOP BH61-00050A ABS HB IV16 1-2. STAND BASE BH61-00049A ABS HB IV16 1-3.
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7 Electrical Parts List 7-5-3 LE17KS/LE17JS Mechanically Different Part List DESCRIPTION Code No SPEC Q’TY NEW/Common REMARK 1. ASS’Y/COVER-FRONT BH96-00277A ABS VO IV16 LE17LT 1-1. COVER FRONT BH63-00129A 1-2. KNOB FUNCTION BH64-00151A ABS HB IV16 ALL(Sync.Sam) (15.17.19) 1-4. LENS LED BH67-00046A ACRYL CLEAR Samtron(15.17.19)
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7 Electrical Parts List Memo 7-58 LE15V*/LE17LS/LE17LT/ LE17KS/LE17KT/LE17JS/LE17JT...
11 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. 11-1 LE15V* Main Schematic Diagram CN203 OEM PROJECT slcon5p SCHEMATIC DIAGRAM (KEY2) Project Name: LEO POWER R611 KEY1 Model Name: LE15VS 1/8W CN202 SDI NORMAL slcon7p HARD POWER...
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11 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. 11-2 LE15V* SN Video Schematic Diagram 80V_1 BD107 ZD106 UZ6.2BSB H_BLK BD106 R122 C124 C123 4.7uF 10nF 100V 500V RB04 BD105 C121 1/6W C122 100nF C111 C112...
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11 Schematic Diagrams 1.00V (IC102 #5,6,7) 1.00V (IC102 #19,20,21) 20.0V (IC106, #2,4,6) 1.00 V (IC102, #24) 1.00 V (IC102, #1) 1.00 V (IC102, #19,20,21) 10.0 V (R,G,B, Video) 20.00V (CRT Socket, G1) 11-4 LE15V*/LE17LS/LE17LT/ LE17KS/LE17KT/LE17JS/LE17JT...
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11 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. 11-3 LE15V* SZ Video Schematic Diagram SK101 crt_sock10p GREEN BLUE RR07 RG07 RB07 330K 330K DR03 DG03 DB03 330K 1/2W 1SS244 1SS244 1SS244 1/2W 1/2W C112 C124...
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11 Schematic Diagrams 1.00V (IC102 #5,6,7) 1.00V (IC102 #19,20,21) 1.00 V (IC102, #24) 1.00 V (IC102, #1) 1.00 V (IC102, #19,20,21) 10.0 V (R,G,B, Video) 20.00V (CRT Socket, G1) 11-6 LE15V*/LE17LS/LE17LT/ LE17KS/LE17KT/LE17JS/LE17JT...
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11 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. 11-4 LE17LS/LE17LT/LE17KS/LE17KT/LE17JS/LE17JT Main Schematic Diagram CN203 OEM PROJECT slcon5p SCHEMATIC DIAGRAM 14V_1 6.3V DDC5V R227 D202 (KEY2) 1N4148 1/6W BD321 Project Name: LEO 50V_SENSE 50V_SENSE2 POWER 1.2UH...
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11 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. 11-5 LE17KS/LE17KT/LE17JS/LE17JT Video Schematic Diagram 80V_1 BD107 ZD106 UZ6.2BSB H_BLK BD106 R122 C124 C123 4.7uF 100nF 100V 100V RB04 BD105 C121 1/8W C122 100nF C111 C112 100UF...
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11 Schematic Diagrams 1.00V (IC102 #5,6,7) 1.00V (IC102 #19,20,21) 20.0V (IC106, #2,4,6) 1.00 V (IC102, #24) 1.00 V (IC102, #1) 1.00 V (IC102, #19,20,21) 10.0 V (R,G,B, Video) 20.00V (CRT Socket, G1) 11-10 LE15V*/LE17LS/LE17LT/ LE17KS/LE17KT/LE17JS/LE17JT...
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11 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. 11-6 LE17LS/LE17LT SN Video Schematic Diagram 80V_1 BD107 ZD106 UZ6.2BSB H_BLK BD106 R122 C124 C123 4.7uF 100nF 100V 100V RB04 BD105 C121 1/8W C122 100nF C111 C112...
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11 Schematic Diagrams 1.00V (IC102 #5,6,7) 1.00V (IC102 #19,20,21) 20.0V (IC106, #2,4,6) 1.00 V (IC102, #24) 1.00 V (IC102, #1) 1.00 V (IC102, #19,20,21) 10.0 V (R,G,B, Video) 20.00V (CRT Socket, G1) 11-12 LE15V*/LE17LS/LE17LT/ LE17KS/LE17KT/LE17JS/LE17JT...
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11 Schematic Diagrams ❈ This Document can not be used without Samsung’s authorization. 11-7 LE17LS/LE17LT SZ Video Schematic Diagram SK101 crt_sock10p GREEN BLUE RR07 RG07 RB07 330K 330K DR03 DG03 DB03 330K 1/2W 1SS244 1SS244 1SS244 1/2W 1/2W C112 C124...
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11 Schematic Diagrams 1.00V (IC102 #5,6,7) 1.00V (IC102 #19,20,21) 1.00 V (IC102, #24) 1.00 V (IC102, #1) 1.00 V (IC102, #19,20,21) 10.0 V (R,G,B, Video) 20.00V (CRT Socket, G1) 11-14 LE15V*/LE17LS/LE17LT/ LE17KS/LE17KT/LE17JS/LE17JT...