/ or other hazards. Product safety is under review continuously and new instructions are issued whenever appropriate. Components identified by on schematics and parts lists must be sealed by a soldering iron after replacement and adjustment. LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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“anti-static” can together, or lifting your foot from a carpeted floor can generate electrical charges sufficient to damage ESDs. generate enough static electricity to damage an ESD. Indicates ESDs on the Schematic Diagram in this manual. LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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Operating Temperature : 32°F ~ 104°F (0°C ~ 40°C) Humidity : 10 % ~ 80 % Storage Temperature : -4°F ~ 113°F (-20°C ~ 45°C) Humidity : 5 % ~ 95 % • Designs and specifications are subject to change without prior notice. LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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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 Figure 2-1. Male Type Figure 2-2. Male Type LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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2 Product Specifications 2-4 Timing Chart This section of the service manual describes the timing that the computer industry recognizes as standard for comput- er-generated video signals. 2-4-1 LB15VS Table 2-1 Timing Chart Mode VESA (LE15V* Only) 800/85 Hz 640/85 Hz...
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B : Horizontal sync width O : Frame time total P : Vertical sync width C : Back porch D : Active time Q : Back porch R : Active time E : Front porch S : Front porch LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
3 Disassembly and Reassembly 3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the LB15VS/LB17LS/LB17KS/LB17LT/LB17KT CDT monitors. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 3-1-1 LB15VS Cautions: 1.
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4. 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. LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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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. 2. Insert the opining jig into the grooves at each side and press until it cilcks and lift up the rear cover. LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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6. Disconnect function wire connecter from the MAIN board. Remove 4 screws from the front cover. 7. Remove CDT from the front cover. 3-2 Reassembly Reassembly procedures are in the reverse order of disassembly procedures. LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
Test the unit again in all directions. If the monitor again fails to meet specifications in every direction, contact your Regional After Service Center for possible CDT replacement. LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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Use control bar after selecting size B+ in the left Menu to adjust the horizontal size of the display, Pattern to 267mm(Tolerance : ±4mm.)(15”) Pattern to 312mm(Tolerance : ±4mm.)(17”) Run the All Mode save in the Right Menu. LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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Use control bar after selecting “V-LINEARITY BAL” in left menu to optimize the image. 4 mm 4-2-4 Trapezoid Adjustment Figure 4-4. Parallelogram CONDITIONS Scanning frequency: 54 kHz/85 Hz : 15” 68 kHz/85 Hz : 17” Display image: Crosshatch pattern LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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Use the directions in sections 4-3-2 through 4-3-3 to adjust the color coordinates for: 9300K to x = 0.283 ± 0.02, y = 0.298 ± 0.02 6500K to x = 0.313 ± 0.02, y = 0.329 ± 0.02 LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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3. Click on the << or >> boxes next to R_CUT and B_CUT to adjust the R-Bias to x = 0.312 ± 0.02 and the B-Bias to y = 0.329 ± 0.02. 4-3-4 (b) GAIN (WITHOUT ABL) ADJUSTMENT LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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68 kHz/85 Hz : 17” Display image: White flat field Brightness: Cut off point at 24 ft-L Contrast: Maximum PROCEDURE Measure luminance at nine points on the display screen (see figure below). Figure 4-9. Luminance Uniformity Check Locations LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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4. Adjust the purity magnet rings on the PCM assembly to display a pure green pattern. Optimum setting: x = 0.285 ± 0.015, y = 0.600 ± 0.015 5. Repeat steps 4 and 5 using a red pattern and then again, using a blue pattern. LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
Check and replace D606. IC601 Pin 1 waveform is Check and replace IC601. right? Check and replace IC201, C627 Voltage is 13 V ± IC301, IC401, Q590, Q490, 0.5V? and 12V regulator circuit. Normal operation? Replace main board. Verify voltages. Done LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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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 voltage exists? supply. Done LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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78 Vpp (Q401, Collector) 5-1-4 S Correction Failure Check S1 ~ S3 signal. S1~S3 signals are correct at Check and replace IC201. each frequency block? Check and replace Q451, Q452, Q453, Q458, Q457, Q456, Q455, D451, D452, D453. LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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IC401 Pin 24 output duty Check and replace IC201, varies with different B+ IC401. 1300 Vpp (Q490, Collector) offset DAC values? Q490 collector Check and replace Q411, waveform is right? Q412, Q413, and Q414. Check components around D405 and L411. LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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5-1-10 Tilt Failure ( Only 17” Function) Check tilt connector connection IC201 Pin 20 output duty varies Check and replace IC201. with different DAC values? Q323 Base output varies Check and replace Q323. with different DAC values? Check and replace Q321 and Q322. LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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IC301 Pin 6 output exists? components around IC301. Check DY connector connection. 5-1-12 V Size or Position Variation Failure IC401 Pin 23 output varies Check and replace IC201 and with different DAC values? IC401. Check and replace IC301. LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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IC102 Pin 22 input exists and Check and replace IC102. varies with different patterns? Check CN201. T501 Pin 8 output exists? Check and replace T501. IC201 Pin 26 output exists and varies with different Check and replace IC201. patterns? Done LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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5 Troubleshooting 5-1-15 Dynamic Focus Failure ( Only 17” Function) WAVEFORMS IC401 Pin 32 output is Replace the IC401. right? 0.58 Vpp (IC401, #32) Some parts around Q551 Replace failed part. are right? T561 Pin 6 input is 50.0 V (T561, #6) Check and replace C443.
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Check +12V, +80V line. inputs are right? Check and replace IC103. Cathode DC levels are Check +80V line. right? Check and replace IC103. 20.0V (IC103, #2,4,6) Check G2 wire, G2 voltage is right? CRT socket board and FBT. Change CRT. Done LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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5 Vpp (IC201, #13, 14) IC201 Pin 13 and 14 Check C202, C203 and X201. inputs are right? Check and replace IC201 and IC201 Pin 18 input is right? R225. All in/output values are Replace IC201. right? Done 5-10 LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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1.00 V (IC101, #1) IC101 Pin 11 and 12 Check IC201 Pin 41 and 42. inputs are right? IC101 Pin 19, 20 and 21 Check and replace IC101. outputs are right? 1.00 V (IC101, #19,20,21) Check and replace IC101. Done LB15VS/LB17LS/LB17KS/ 5-11 LB17LT/LB17KT...
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S/W button? Check IC201. 5-1-20 Degaussing Failure Check degaussing connector. RL601 operation is right? Check D-coil and TH601. Q621 base input is right? Check and replace Q621. IC201 Pin 10 output is right? Check and replace IC201. Done 5-12 LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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R, G, B cathode voltage. 5-2-2 Shut Down Blinking LED’s? Check power supply. Check horizontal, vertical deflection system and check Scan failure? power supply secondary voltages. Video failure? Check video board. Check and replace IC201. Done LB15VS/LB17LS/LB17KS/ 5-13 LB17LT/LB17KT...
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Check IC101 Pin 14, 15 and 16. cathodes? Check IC102. G2 voltage is right? Check T501. Heater voltage is right? Check D622, Q623 and R131. G1 voltage is right? Check D504, Q512 and T501. Replace CRT. Done 5-14 LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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G2 voltage is right? Check T501. Blank pulse at Pin 3 of Check IC401. IC401? 20.00V (CRT Socket, G1) V_FLB pulse at Check Q511. collector of Q511? Valid the vertical pulse Check CN102 and CN201. on CRT socket G1? Done LB15VS/LB17LS/LB17KS/ 5-15 LB17LT/LB17KT...
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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. Done 5-16 LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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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 LB15VS/LB17LS/LB17KS/ 5-17 LB17LT/LB17KT...
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Dynamic focus circuit is Refer to 5-1-15 dynamic right? focus failure. Replace the CRT and verify focus. 5-2-8 Purity Failure Degause Purity is correct? Done Degaussing circuit is Refer to 5-1-20 degaussing correct? failure. Replace CRT and verify purity. 5-18 LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
6 Exploded View & Parts List 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 LB15VS LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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6 Exploded View & Parts List 6-2 LB17KS LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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6 Exploded View & Parts List 6-3 LB17KT LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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6 Exploded View & Parts List 6-4 LB17LS/LB17LT LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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 LB15VS Main PCB Parts Level Code No. Loc. No. Description Specification Remarks LB15VS SN-LB15VS SDI,NORMAL BH94-01019A ASSY PCB MAIN-SN...
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7 Electrical Parts List Memo 7-46 LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...
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VIDEO BOARD VIDEO OUTPUT SIGNAL VIDEO INPUT IC103(LM2470) VIDEO PRE-AMP + OSD SOCKET IC101(LM1236) H/V SYNC HEATER MAIN BOARD H-SYNC, V-SYNC H/V SIZE REG. H-SYNC1 VER. DY VER. OUTPUT 17"Only V-SYNC1 CN401 FROM IC401 IC301 (SVT9325) T501 210V E/W_OUT UP, DOWN HORZ./VER.
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11 Schematic Diagrams 11 Schematic Diagrams This Document can not be used without Samsung’s authorization. LB15VS/LB17LS/LB17KS/LB17LT/LB17KT 11-1 Main Schematic Diagram CN204 6.3V slcon2p KEY1 SCHEMATIC DIAGRAM 17" only OEM PROJECT OEM Only R325 R327 R328 CN203 CN205 Project Name: LIBRA...
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11 Schematic Diagrams This Document can not be used without Samsung’s authorization. LB15VS/LB17LS/LB17KS/LB17LT/LB17KT 11-2 Video Schematic Diagram PROJECT: Libra project MODEL: LB17KS/LS,LB15VS 5V_V 5V_V 15"Only 5V_V crt_sock10p BD104 BD103 1.2uH 1.2uH C109 GREEN 100nF BLUE C110 C111 C114 C115 ZD102...
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11 Schematic Diagrams 1.00V (IC101 #5,6,7) 1.00V (IC101 #19,20,21) 1.00 V (IC101, #24) 1.00 V (IC101, #19,20,21) 1.00 V (IC101, #1) 10.0 V (R,G,B, Video) 20.00V (CRT Socket, G1) 11-4 LB15VS/LB17LS/LB17KS/ LB17LT/LB17KT...