Kortek KT-2114DF Service Manual Download

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8. CONNECTING DIAGRAM

CN401

CN407

CN807

CN411

CN401

15PIN VGA SIGNAL IN

CN404

CN409

CN406

* CN407 & CN409orCN406= GGA/EGA
* CN405 & CN404= VGA/SVGA

CN405

ⓛ

PIN NO.

CN4 06

CN409

①

R-IN

②

G-IN

③

B-IN

④

GND

⑤

V-S YNC

H/V -SYNC

⑥

H-SYNC

5PIN,6PIN SIGNAL INPUT

CN801

ⓛ

Summary of Contents for KT-2114DF

Page 1: ...SERVICE MANUAL COLOR CRT MONITOR KT 2914F KT 2914DF KT 2114F KT 2114DF KORTEK CORPORATION DOC NO KT XX14X SM DATE 2004 02 02 REV NO 0 REV DATE...

Page 2: ...IONS 3 2 PRODUCT SPECIFICATION 6 3 OPERATING INSTRUCTION 9 4 ADJUSTMENTS 11 5 TROUBLE SHOOTING GUIDE 19 6 PART LIST 29 7 BLOCK DIAGRAM 34 8 CONNECTING DIAGRAM 35 9 SCHEMATIC 36 10 PRINT CIRCUIT BOARD...

Page 3: ...age can produce potentially hazardous X Ray RADIA TION To avoid such hazards the high voltage must be above the specified limit The nominal value of the High voltage of this Monitor is 26KV 0 3KV at z...

Page 4: ...att resistor paralleled by a 0 15Uf capacitor in serial with an exposed metal chassis part and a known earth ground such as an electrical conductor and electrical ground connected to a earth ground c...

Page 5: ...he wrong direction may cause excessive X ray emissions WARNING 3 An electrolytic capacitor installed with the wrong polarity might explode 1 Servicing precautions are printed on the chassis and should...

Page 6: ...90 264V 60 50 3Hz Power Consumption Nomal Operation Input Current at 120V Input Current at 240V 120 Watts Operating 1 5Amps rms Turn on 30Amps Peak Operating 0 8Amps rms Turn on 60Amps Peak Linearity...

Page 7: ...C 12 SDA 13 H SYNC C S ORANGE 6P CONN 1 14 V SYNC WHITE 6P CONN 2 15 SCL SHELL GND RING WIRE CGA EGA 6PIN CONNECTION PCB CKT NO CN406 CONNECTION REMARK CGA SLOT ZAMMA Spec_ WIRE COLOR 6P CONN PCB 1 A...

Page 8: ...400 640 480 800 600 H f KHz 15 750 15 750 24 827 31 469 37 88 A uS 63 5 63 5 40 28 31 778 26 40 B uS 8 671 8 672 3 04 3 813 3 20 C uS 7 272 7 272 3 8 1 907 2 20 D uS 40 836 40 836 30 399 25 422 20 00...

Page 9: ...9 3 1 SET ASS Y 3 2 MAIN PCB ASS Y 3 Operating Instruction...

Page 10: ...the MENU disappears This button is used to select the control item on the MENU In MENU the control item could be selected and unselected by this button EXIT This button is used to exit the value of an...

Page 11: ...hout signal Adjustment 26KV 0 3KV PROCEDURE Disconnect the AC line cord from the power source Connect positive end of High Voltage probe to anode cap of CRT negative end of to GND main chassis First o...

Page 12: ...function control 3 Press the MENU SELECT button 4 UP or DOWN button is used to control the value of any function 5 When you press exit button the MENU disappears 4 2 1 Screen center adjustment width...

Page 13: ...se to H POS d Vertical position adjustment 4 2 2 Trapezoid adjustment frequency all mode signal pattern cross hatch 4 2 3 Pin balance adjustment frequency all mode signal pattern cross hatch 4 2 4 Par...

Page 14: ...4 2 6 Tilt adjustment frequency all mode signal pattern cross hatch brightness MIN cut off contrast MAX 4 2 7 Degaussing adjustment Don t adjust the degaussing Degaussing is possible in OSD adjustmen...

Page 15: ...ondition frequency 640 480 60Hz display pattern back raster pattern brightness MIN cut off contrast MAX 1 Select factory mode 2 Select COLOR TEMP with UP DOWN key 3 Select 9300K 4 Adjust back raster b...

Page 16: ...Select contrast icon with UP DOWN key adjust contrast to 50 60f l with UP DOWN key 8 Select ACL key A C in full white pattern and adjust ACL to 28 30f l attention If 50f l doesn t adjust in 20 window...

Page 17: ...MIN cut off contrast MAX Measure nine brightness display in the screen 4 3 5 Focus adjustment set condition frequency 640 480 60Hz display pattern H character brightness min cut off contrast max 1 Adj...

Page 18: ...ection east frequency included timing chart display pattern full white brightness MIN cut off display center Most suitable RED x 0 640 0 015 y 0 323 0 015 GREEN x 0 295 0 015 y 0 594 0 015 BLUE x 0 14...

Page 19: ...heck the other secondary outputs 250V 130V 80V 12V 12V 12V 6 3V 5V Lines Does each output appear Measure 80V output between cathode of D110 and Ground Does appear 80V DC Check and replace F101 IC103 C...

Page 20: ...2 2 Replace CRT and verify purity YES YES NO NO Check degauss Connector CN102 Check output voltage at pin 12 of IC502 Normal 0V Degaussing 5V Does DC voltage right Check and replace Q101 D101 RL101 R1...

Page 21: ...the convergence now within spec YES NO NO YES NO NO 5 2 5 Misconvergence Failure Check tilt connection CN402 IC 502 pin 35 output varies with different values DC 0V 5V Check and replace R COIL of the...

Page 22: ...Check and replace D608 610 Pin 9 of IC602 pulse exist Replace IC602 YES NO YES NO NO YES YES NO NO 5 2 7 High Voltage Failure Check pin 36 of IC502 output varies with different value DC 0V 5V Check Q7...

Page 23: ...le Focus Done Check and replace T701 Replace the CPT and verify focus YES NO YES NO NO 5 2 10 Dynamic Focus Failure or poor Focus Others Check the voltage at pin 21 of IC502 Normal 5V Push the EXIT Ke...

Page 24: ...ace Q605 12V Check and replace pin 12 of the IC802 NO YES YES 5 2 11 ACL Failure Is Screen voltage 550 50V right Check Screen control voltage and FBT Does Q201 collector pulse 35Vp p exist Check 80V L...

Page 25: ...oes fly back pulse at collector of Q712 appear Check the Pin 26 of IC301 Does 12Vp p pulse appear Check D712 D715 and 80V Line Check and replace IC301 Does the wave form at pin 8 of T703 appear Check...

Page 26: ...right Check and replace IC802 Q802R G B video output are right Check Q803 and 12V 80V Line R G B cathode wave forms are right Check R806R G B and Q801R G B G2 voltage are right 550 50V Check screen CP...

Page 27: ...U botton IC502 Pin10 Pin11 wave forms are right Check IC502 and SDA SCL Line Check and replace IC802 NO YES YES NO YES YES NO 5 2 16 OSD failure IC 301 Pin24 output parabola level variable Check and r...

Page 28: ...ppear at Pin5 of IC201 Refer to No power supply IC 301 Pin 13 Pin 23 output exist IC 502 Pin 33 output exist Check and replace IC301 Check and replace IC201 YES NO YES NO YES Check and replace IC502 N...

Page 29: ...1 EA R730 1 21 1203R9F5A 1 4W 3 9 KOHM1 RES METAL 1 EA R634 1 21 1203R9J4A 1 6W 3 9 KOHM RES CARBON 1 EA R516 1 21 1207R5J4A 1 6W 7 5 KOHM RES CARBON 1 EA R749 1 21 1208R2F4A 1 6W 8 2 KOHM1 RES METAL...

Page 30: ...FET 1 EA Q713 1 30 8Z0027BEX SSS10N60A FET 1 EA Q603 1 31 100002MZX ATS 49 U 12MHZ CRISTAL 1 EA X501 1 33 130001901 FQM19A002 F B T 1 EA T601 1 33 210082004 SCT 82D TRANS SCAN KT 2938F 1 EA T303 1 33...

Page 31: ...IP TAPING 2 EA F101 1 21 111200J4A 1 6W 120 OHM RES CARBON 3 EA R801 R816 R817 1 21 1201R5J4A 1 6W 1 5 KOHM RES CARBON 3 EA R109 R611 R703 1 21 1208R2J4A 1 6W 8 2 KOHM RES CARBON 3 EA R205 R401 R705 1...

Page 32: ...S 16V 220 UFT P CAP ELECT 8 11 5 2 EA C810 C823 2 30 3B3904TAX 2N3904 TA TR 2 EA Q801 Q802 2 09 121540P20 C3503 D H S ASS Y 3 PCS Q803R Q803G Q803B 2 21 111000J8A 1 2W 100 OHM RES CARBON 3 EA R806R R8...

Page 33: ...15 1 2 1 2W 1 2 1 2W 1 2 1 2W 1 2 1 2W 1 2 1 2W 10 R216 1 2 1 2W 2 7 1 2W 2 7 1 2W 4 7 1 2W 4 7 1 2W 11 T701 ET 14 ET 14 ET 14 NONE NONE 12 C706 103 250V MPP 103 250V MPP 103 250V MPP NONE NONE 13 R71...

Page 34: ...TICAL OUTPUT TDA8172 TLIT CONTROL TILT COIL DEFLECTION YOKE VIDEO AMP KA2506 HIGH VOLTAGE REGULATION OSD PROCESSOR WT6802 VIDEO OUTPUT CUT OFF CONTROL R G B INPUT MICRO CONTROLLER UNIT WT62P1 ADJUST K...

Page 35: ...01 CN407 CN807 CN411 CN401 15PIN VGA SIGNAL IN CN404 CN409 CN406 CN407 CN409orCN406 GGA EGA CN405 CN404 VGA SVGA CN405 PIN NO CN406 CN409 R IN R IN G IN G IN B IN B IN GND GND V SYNC H V SYNC H SYNC 5...

Page 36: ...4 330K 1 2W 1 CN803 GT 1P 1 CN804 GT 1P 1 CN805 GT 1P 1 CN808 GT 1P L807 BD L808 BD L809 BD C805 0 0047U M C808 0 22U M C801 100U 16V C205 470U 16V C508 47U 50V R 5 1 3 2 2K C506 1000P 50V D402 LED 1...

Page 37: ...37 10 PRINT CIRCUIT BOARD 10 1 MAIN 247mm 247mm...

Page 38: ...38 10 2 VIDEO 25mm 150mm 128mm 98mm...

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