Kortek KTN-1401 Service Manual Download | Manualshive

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30

7-6 X-RAY PROTECTION PLOBLEM

CHECK

IC301

X-RAY PROTECTION PROBLEM

CHANGE

IC301

NG

OK

OK

CHECK VR303

CHANGE VR303

NG

OK

OK

CHECK

C311

OK

CHECK

D301

CHANGE D301

NG

OK

OK

CHECK

FBT

CHANGE FBT

NG

OK

OK

END

CHECK & CHANGE

C311

NG

OK

KORTEK Corporation

KTN-2001/1401

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Summary of Contents for KTN-1401

Page 1: ...1 SERVICE MANUAL KTN 2001 KTN 1401 Rev No A...

Page 2: ...2 CONTENTS 1 PRECAUTIONS 3 2 PRODUCT SPECIFICATIONS 6 3 OPERATING INSTRUCTIONS 11 4 ADJUSTMENT 11 5 BLOCK DIAGRAM 13 6 GENERAL THEORY OF OPERATION 14 7 TROUBLESHOOTING GUIDE 25 8 WAVE FORM 31...

Page 3: ...uncoated or melted wire is found then please do not try to replace the related parts and contact a qualified service person 2 Many electrical mechanical parts in this monitor have special safety relat...

Page 4: ...high voltage The high voltage meter should indicate the following factory recommended level 4 If the actual level exceeds the max factory set level then immediate service is required to prevent the po...

Page 5: ...ll any component or assembly disconnect PCB plugs or connectors connect any test component in parallel with an electrolytic capacitor 3 After servicing always check that the screw components and wirin...

Page 6: ...hm MONITOR TERMINATIONS RASTER DIM ADJUST RANGE HORIZONTAL 360 407 mm RASTER DIM ADJUST RANGE VERTICAL 190 309 mm MODE 15 75 Khz PINCUSHION ALL BRIGHTNESS 3 0 MIS CONVERGENCE CENTER 0 75 0 8 mm MIS CO...

Page 7: ...NS RASTER DIM ADJUST RANGE HORIZONTAL 250 285 mm RASTER DIM ADJUST RANGE VERTICAL 118 214 mm MODE 15 75 Khz PINCUSHION ALL BRIGHTNESS 3 0 MIS CONVERGENCE CENTER 0 64 0 7 mm MIS CONVERGENCE CORNERS 1 0...

Page 8: ...8 2 2 PCB DIMENSIONS 1 MAIN PCB KTN 2001 1401 KORTEK Corporation...

Page 9: ...ABLE CONNECTOR 2 2 2 PIN DESCRIPTION PIN NO P I N N A M E P I N1 RED P I N2 B L U E P I N3 G R E E N P I N4 B L A C K P I N5 Y L L OW P I N6 W H I T E RED G R E E N B L U E Y E L L O B L U E W H I T E...

Page 10: ...VERTICAL SYNC G H NO 1 MODE STANDARD RESOLUTION H 624 V 200 SYNC POLARITY H POSI V POSI H FREQUENCY 15 750 PERIOD 62 4 SYNC 5 5 B P 5 8 ACTIVE 43 0 V FREQUENCY 60 PERIOD 16 62 SYNC 0 98 F P 1 06 ACTI...

Page 11: ...time The monitor must be on for 30 minutes before starting alignment Warm up time is especially critical in color temperature and white balance adjustments 3 Signal Analog 0 714vpp positive at 75 inte...

Page 12: ...V R603 B SELECT V SIZE FUNCTION ADJUST TO THE VERTICAL SIZE IS 190mm 3mm 118mm V R204 C SELECT H POSI FUNCTION ADJUST TO CENTER THE PATTERN WITHIN THE RASTER V R301 D SELECT V POSI FUNCTION ADJUST TO...

Page 13: ...0 3 N V I D E O D E I V E R G B H V S I G N A L C O N T R O L 74L S 8 6 V E R T I C A L O U T T D A 1 6 7 5 A H O R I Z O N T A L T D A 2 5 9 5 S M P S O U TP U T F B T O U TP U T H V G3 G1 H V R G B...

Page 14: ...f the complete monitor This will help when covering the sections individually The process from video signal to video display starts with the video signal generated from the source The signal is compos...

Page 15: ...18 22 and 27 are B G and R Drive PIN 22 is fixed G Drive is fixed as a reference and PIN 18 and 27 control gains Refer to LM1203 Date Book for details 6 3 VIDEO OUT PUT AMP BIAS SECTION Signal supplie...

Page 16: ...cuit operates as following As the DC is supplied to FE401 Gate through R402 overvoltage preventive resister and R403 Start Resister FE401 is turned on provides pulse to T401 PINs 2 and 4 and supplies...

Page 17: ...is reduced to stop and protect the circuit C405 R404 and D405 are the circuits that protect FE401 from surge as it switches These sequential actions make power to be supplied to the secondary side of...

Page 18: ...input from outside and built in OSC phase and coincide them which is mainly done by C308 C309 R306 R307 and is assured by adjustment of DC level with VR302 Generally connecting voltage is controlled w...

Page 19: ...ltage and circuit is composed of C308 R309 R308 and VR302 6 6 VERTICAL OUTPUT CIRCUIT SECTION As IC 201 is built in with oscillating part within chip it has a function of its own oscillation amplifica...

Page 20: ...2 C207 and VR204 and are controlled according to the value of V R204 PIN 8 is GND terminal PIN 9 and 10 are terminals to control V linearity and its circuit is as follows It is composed of R214 V R204...

Page 21: ...1 This voltage varies according to the supplied voltage and here supplied voltage is boosted into higher voltage at T701 Then it becomes output as high voltage screen voltage focus voltage and etc 6 8...

Page 22: ...s composed using the chip built in with 4 sets of EXCLUSIVE OR Gate circuit PIN 14 is Vcc supplying terminal for driving of chip PIN 1 2 4 5 9 10 12 and 13 are SYNC input terminal PIN 3 6 8 11 are out...

Page 23: ...tage to adjust so that Back Raster is 0 1 F L 4 Measuring condition cross hatch pattern 3 High voltage adjustment method 1 Measuring terminal CRT anode 2 Adjusting V R 24KV 300V 3 Measuring condition...

Page 24: ...time please confirm 30 F L 40F L at Full White 7 Other V R Adjustment 1 Measuring condition BS 120 cross hatch pattern 31 5 KHz 640 480 mode 2 Measuring method H size Min below 360mm 250mm Max over sc...

Page 25: ...CHANGE FUSE NG OK OK CHECK BD401 CHANGE BD401 NG OK OK CHECK FE401 CHECK CHANGE Q401 NG OK OK CHECK Q402 Q403 CHANGE Q402 3 NG OK OK CHECK B 110V CHECK T101 NG OK OK CHECK COMPONENT CHANG D403 D404 D...

Page 26: ...OK OK CHECK IC501 CHANGE IC501 NG OK OK CHECK 12V CHECK CHANGE D404 NG OK OK CHECK Q501 2 3 CHANGE Q401 2 3 NG OK OK CHECK CATHODE CHECK SG501 2 3 NG OK OK CHECK COMPONENT CHANG G1 LINE SG504 G2 LINE...

Page 27: ...C801 NO SYNC PLOBLEM CHANGE IC801 NG OK OK CHECK Q801 301 CHANGE Q801 301 NG OK OK CHECK IC301 IC201 CHECK CHANGE C205 NG OK OK CHECK IC501 CHANGE IC501 NG OK OK END CHECK CHANGE C303 V R302 NG OK KOR...

Page 28: ...ERTICAL DEFLECTION PROBLEM CHANGE D202 NG OK OK CHECK IC201 CHANGE IC201 NG OK OK CHECK 12V CHECK CHANGE D404 NG OK OK CHECK R218 CHANGE R218 NG OK OK CHECK DY CABLE CHANGE CDT NG OK OK END CHECK CHAN...

Page 29: ...HORIZONTAL DEFLECTION PROBLEM CHANGE IC601 NG OK OK CHECK Q601 CHANGE Q601 NG OK OK CHECK DRIVE CHECK CHANGE IC301 NG OK OK CHECK FBT CHANGE FBT NG OK OK CHECK DY CABLE CHANGE CDT NG OK OK END CHECK C...

Page 30: ...CHECK IC301 X RAY PROTECTION PROBLEM CHANGE IC301 NG OK OK CHECK VR303 CHANGE VR303 NG OK OK CHECK C311 OK CHECK D301 CHANGE D301 NG OK OK CHECK FBT CHANGE FBT NG OK OK END CHECK CHANGE C311 NG OK KO...

Page 31: ...parts 1 FE401 DRAIN OUTPUT WAVEFORM 2 HORIZONTAL INPUT WAVEFORM 3 VERTICAL INPUT WAVEFORM 4 Q605 HORIZONTAL DRIVE WAVEFORM 5 Q604 HORIZON OUTPUT WAVEFORM 6 IC201PIN 1 VERTICAL OUTPUT WAVEFORM KORTEK C...

Page 32: ...32 7 CLAMP IC501 PIN 14 WAVEFORM 8 Q702 COLLECTOR PULSE WAVEFORM 9 IC501 1203 PIN 25 IN PUT WAVEFORM 10 Q501 COLLECTOR WAVEFORM KORTEK Corporation KTN 2001 1401...

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